readme changelog updated, stable tag updated 1.4.3
readme changelog updated, stable tag updated

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  # Translation of Development (trunk) in Romanian
  # This file is distributed under the same license as the Development (trunk) package.
  msgid ""
  msgstr ""
  "PO-Revision-Date: 2015-11-26 15:42:47+0000\n"
  "MIME-Version: 1.0\n"
  "Content-Type: text/plain; charset=UTF-8\n"
  "Content-Transfer-Encoding: 8bit\n"
  "Plural-Forms: nplurals=3; plural=(n==1 ? 0 : (n==0 || (n%100 > 0 && n%100 < 20)) ? 1 : 2);\n"
  "X-Generator: GlotPress/1.0-alpha-1100\n"
  "Project-Id-Version: Development (trunk)\n"
 
  #: vcaching.php:505
  msgid "Settings"
  msgstr "Setari"
 
  #: vcaching.php:495
  msgid "Purge"
  msgstr "Sterge"
 
  #: vcaching.php:616
  msgid "URL"
  msgstr "URL-ul"
 
  #: vcaching.php:623
  msgid "Relative URL to purge. Example : /wp-content/uploads/.*"
  msgstr "URL relativ pentru stergere. Exemplu : /wp-content/uploads/.*"
 
  #: vcaching.php:351
  msgid "Trying to purge URL :"
  msgstr "Incercare de stergere URL :"
 
  #: vcaching.php:478
  msgid "Console"
  msgstr "Consolă"
 
  #: vcaching.php:476
  msgid "Options"
  msgstr "Opţiuni"
 
  #: vcaching.php:508
  msgid "Homepage cache TTL"
  msgstr "Cache TTL homepage "
 
  #: vcaching.php:509
  msgid "Cache TTL"
  msgstr "Cache TTL"
 
  #: vcaching.php:510
  msgid "IPs"
  msgstr "IPs"
 
  #: vcaching.php:511
  msgid "Dynamic host"
  msgstr "Host dinamic"
 
  #: vcaching.php:513
  msgid "Hosts"
  msgstr "Domenii"
 
  #: vcaching.php:515
  msgid "Override default TTL"
  msgstr "Suprascrie TTL"
 
  #: vcaching.php:516
  msgid "Purge key"
  msgstr "Cheia pentru purge"
 
  #: vcaching.php:517
  msgid "Enable debug"
  msgstr "Activeaza debug"
 
  #: vcaching.php:536
  msgid "Enable Varnish Caching"
  msgstr "Activeaza caching Varnish"
 
  #: vcaching.php:544
  msgid "Time to live in seconds in Varnish cache for homepage"
  msgstr "Secunde de caching in cache Varnish pentru homepage"
 
  #: vcaching.php:552
  msgid "Time to live in seconds in Varnish cache"
  msgstr "Secunde de caching in cache Varnish"
 
  #: vcaching.php:560
  msgid "Comma separated ip/ip:port. Example : 192.168.0.2,192.168.0.3:8080"
  msgstr "ip/ip:port separate de virgula. Exemple : 192.168.0.2,192.168.0.3:8080"
 
  #: vcaching.php:569
  msgid "Uses the $_SERVER['HTTP_HOST'] as hash for Varnish. This means the purge cache action will work on the domain you're on.<br />Use this option if you use only one domain."
  msgstr "Foloseste $_SERVER['HTTP_HOST'] ca hash pentru Varnish. Asta inseamna ca actiunea de purge va functiona doar pe domeniul care esti.<br />Foloseste aceasta optiune daca folosesti un singur domeniu."
 
  #: vcaching.php:579
  msgid "Comma separated hostnames. Varnish uses the hostname to create the cache hash. For each IP, you must set a hostname.<br />Use this option if you use multiple domains."
  msgstr "Domenii separate de virgula. Varnish foloseste domeniul pentru a creea hash-ul pentru cache. Pentru fiecare IP, trebuie sa setezi un domeniu.<br />Foloseste aceasta optiune daca folosesti mai multe domenii."
 
  #: vcaching.php:588
  msgid "Override default TTL on each post/page."
  msgstr "Suprascrie TTL pentru fiecare post/pagina."
 
  #: vcaching.php:597
  msgid "Key used to purge Varnish cache. It is sent to Varnish as X-VC-Purge-Key header. Use a SHA-256 hash.<br />If you can't use ACL's, use this option."
  msgstr "Cheie folosita la stergerea cacheului. Este trimisa catre Varnish ca headerul X-VC-Purge-Key. Foloseste un hash gen SHA-256.<br />Daca nu poti folosi ACL, foloseste aceasta optiune."
 
  #: vcaching.php:607
  msgid "Send all debugging headers to the client. Also shows complete response from Varnish on purge all."
  msgstr "Trimite toate headerele pentru debug catre client. De asemenea va arata raspunsul complet dat de Varnish la actiunea de sterge tot cacheul."
 
  #. Plugin Name of the plugin/theme
  msgid "VCaching"
  msgstr "VCaching"
 
  #. Plugin URI of the plugin/theme
  msgid "http://wordpress.org/extend/plugins/vcaching/"
  msgstr "http://wordpress.org/extend/plugins/vcaching/"
 
  #. Description of the plugin/theme
  msgid "WordPress Varnish Cache integration."
  msgstr "Integrare WordPress cu Varnish Cache."
 
  #. Author of the plugin/theme
  msgid "Razvan Stanga"
  msgstr "Razvan Stanga"
 
  #. Author URI of the plugin/theme
  msgid "http://git.razvi.ro/"
  msgstr "http://git.razvi.ro/"
 
  #: vcaching.php:46
  msgid "Not required. If filled in overrides default TTL of %s seconds. 0 means no caching."
  msgstr "Nu este obligatoriu. Daca este completat, va suprascrie TTL-ul de baza de %s secunde. 0 inseamna cache dezactivat."
 
  #: vcaching.php:242
  msgid "Varnish message:"
  msgstr "Mesaj de la Varnish:"
 
  #: vcaching.php:247
  msgid "Please set the IPs for Varnish!"
  msgstr "Te rog sa setezi IP-urile pentru Varnish."
 
  #: vcaching.php:252
  msgid "Varnish Caching requires you to use custom permalinks. Please go to the <a href=\"options-permalink.php\">Permalinks Options Page</a> to configure them."
  msgstr "Varnish Caching are nevoie sa folosesti custom permalinks. Te rugam mergi la <a href=\"options-permalink.php\">Permalinks Options Page</a> pentru a le configura."
 
  #: vcaching.php:259 vcaching.php:262 vcaching.php:278
  msgid "Purge ALL Varnish Cache"
  msgstr "Sterge TOT cacheul Varnish"
 
  #: vcaching.php:273
  msgid "Please setup Varnish IPs to be able to use <a href=\"%1$s\">Varnish Caching</a>."
  msgstr "Te rugam sa setezi IP-urile pentru a putea folosi <a href=\"%1$s\">Varnish Caching</a>."
 
  #: vcaching.php:275
  msgid "<a href=\"%1$s\">Varnish Caching</a> automatically purges your posts when published or updated. Sometimes you need a manual flush."
  msgstr "<a href=\"%1$s\">Varnish Caching</a> sterge automat cache-ul cand publici sau modifici un post. Uneori e nevoie si de o stergere manuala."
 
  #: vcaching.php:276
  msgid "Press the button below to force it to purge your entire cache."
  msgstr "Apasa butonul de mai jos pentru a forta stergerea totala a cache-ului."
 
  #: vcaching.php:280
  msgid "You do not have permission to purge the cache for the whole site. Please contact your adminstrator."
  msgstr "Nu ai permisiunea sa stergi tot cache-ul. Te rugam contacteaza un administrator."
 
  #: vcaching.php:465 vcaching.php:473
  msgid "Varnish Caching"
  msgstr "Caching Varnish"
 
  #: vcaching.php:507
  msgid "Enable"
  msgstr "Activare"
 Binary files /dev/null and b/languages/vcaching.mo differ
  # Translation of Development (trunk) in English (Canada)
  # This file is distributed under the same license as the Development (trunk) package.
  msgid ""
  msgstr ""
  "PO-Revision-Date: 2015-11-26 07:44:46+0000\n"
  "MIME-Version: 1.0\n"
  "Content-Type: text/plain; charset=UTF-8\n"
  "Content-Transfer-Encoding: 8bit\n"
  "Plural-Forms: nplurals=2; plural=n != 1;\n"
  "X-Generator: GlotPress/1.0-alpha-1100\n"
  "Project-Id-Version: Development (trunk)\n"
 
  #: vcaching.php:481
  msgid "Console"
  msgstr "Console"
 
  #: vcaching.php:619
  msgid "Purge URL"
  msgstr ""
 
  #: vcaching.php:626
  msgid "URL to purge"
  msgstr ""
 
  #: vcaching.php:479
  msgid "Options"
  msgstr "Options"
 
  #: vcaching.php:511
  msgid "Homepage cache TTL"
  msgstr "Homepage cache TTL"
 
  #: vcaching.php:512
  msgid "Cache TTL"
  msgstr "Cache TTL"
 
  #: vcaching.php:513
  msgid "IPs"
  msgstr "IPs"
 
  #: vcaching.php:514
  msgid "Dynamic host"
  msgstr "Dynamic host"
 
  #: vcaching.php:516
  msgid "Hosts"
  msgstr "Hosts"
 
  #: vcaching.php:518
  msgid "Override default TTL"
  msgstr "Override default TTL"
 
  #: vcaching.php:519
  msgid "Purge key"
  msgstr "Purge key"
 
  #: vcaching.php:520
  msgid "Enable debug"
  msgstr "Enable debug"
 
  #: vcaching.php:539
  msgid "Enable Varnish caching"
  msgstr "Enable Varnish caching"
 
  #: vcaching.php:547
  msgid "Time to live in seconds in Varnish cache for homepage"
  msgstr "Time to live in seconds in Varnish cache for homepage"
 
  #: vcaching.php:555
  msgid "Time to live in seconds in Varnish cache"
  msgstr "Time to live in seconds in Varnish cache"
 
  #: vcaching.php:563
  msgid "Comma separated ip/ip:port. Example : 192.168.0.2,192.168.0.3:8080"
  msgstr "Comma separated ip/ip:port. Example : 192.168.0.2,192.168.0.3:8080"
 
  #: vcaching.php:572
  msgid "Uses the $_SERVER['HTTP_HOST'] as hash for Varnish. This means the purge cache action will work on the domain you're on.<br />Use this option if you use only one domain."
  msgstr "Uses the $_SERVER['HTTP_HOST'] as hash for Varnish. This means the purge cache action will work on the domain you're on.<br />Use this option if you use only one domain."
 
  #: vcaching.php:582
  msgid "Comma separated hostnames. Varnish uses the hostname to create the cache hash. For each IP, you must set a hostname.<br />Use this option if you use multiple domains."
  msgstr "Comma separated hostnames. Varnish uses the hostname to create the cache hash. For each IP, you must set a hostname.<br />Use this option if you use multiple domains."
 
  #: vcaching.php:591
  msgid "Override default TTL on each post/page."
  msgstr "Override default TTL on each post/page."
 
  #: vcaching.php:600
  msgid "Key used to purge Varnish cache. It is sent to Varnish as X-VC-Purge-Key header. Use a SHA-256 hash.<br />If you can't use ACL's, use this option."
  msgstr "Key used to purge Varnish cache. It is sent to Varnish as X-VC-Purge-Key header. Use a SHA-256 hash.<br />If you can't use ACL's, use this option."
 
  #: vcaching.php:610
  msgid "Send all debugging headers to the client. Also shows complete response from Varnish on purge all."
  msgstr "Send all debugging headers to the client. Also shows complete response from Varnish on purge all."
 
  #. Plugin Name of the plugin/theme
  msgid "VCaching"
  msgstr "VCaching"
 
  #. Plugin URI of the plugin/theme
  msgid "http://wordpress.org/extend/plugins/vcaching/"
  msgstr "http://wordpress.org/extend/plugins/vcaching/"
 
  #. Description of the plugin/theme
  msgid "WordPress Varnish Cache integration."
  msgstr "WordPress Varnish Cache integration."
 
  #. Author of the plugin/theme
  msgid "Razvan Stanga"
  msgstr "Razvan Stanga"
 
  #. Author URI of the plugin/theme
  msgid "http://git.razvi.ro/"
  msgstr "http://git.razvi.ro/"
 
  #: vcaching.php:46
  msgid "Not required. If filled in overrides default TTL of %s seconds. 0 means no caching."
  msgstr "Not required. If filled in overrides default TTL of %s seconds. 0 means no caching."
 
  #: vcaching.php:242
  msgid "Varnish message:"
  msgstr "Varnish message:"
 
  #: vcaching.php:247
  msgid "Please set the IPs for Varnish!"
  msgstr "Please set the IPs for Varnish!"
 
  #: vcaching.php:252
  msgid "Varnish Caching requires you to use custom permalinks. Please go to the <a href=\"options-permalink.php\">Permalinks Options Page</a> to configure them."
  msgstr "Varnish Caching requires you to use custom permalinks. Please go to the <a href=\"options-permalink.php\">Permalinks Options Page</a> to configure them."
 
  #: vcaching.php:259 vcaching.php:262 vcaching.php:278
  msgid "Purge ALL Varnish Cache"
  msgstr "Purge ALL Varnish Cache"
 
  #: vcaching.php:273
  msgid "Please setup Varnish IPs to be able to use <a href=\"%1$s\">Varnish Caching</a>."
  msgstr "Please setup Varnish IPs to be able to use <a href=\"%1$s\">Varnish Caching</a>."
 
  #: vcaching.php:275
  msgid "<a href=\"%1$s\">Varnish Caching</a> automatically purges your posts when published or updated. Sometimes you need a manual flush."
  msgstr "<a href=\"%1$s\">Varnish Caching</a> automatically purges your posts when published or updated. Sometimes you need a manual flush."
 
  #: vcaching.php:276
  msgid "Press the button below to force it to purge your entire cache."
  msgstr "Press the button below to force it to purge your entire cache."
 
  #: vcaching.php:280
  msgid "You do not have permission to purge the cache for the whole site. Please contact your adminstrator."
  msgstr "You do not have permission to purge the cache for the whole site. Please contact your adminstrator."
 
  #: vcaching.php:467 vcaching.php:469 vcaching.php:476
  msgid "Varnish Caching"
  msgstr "Varnish Caching"
 
  #: vcaching.php:510
  msgid "Enable"
  msgstr "Enable"
file:a/readme.txt -> file:b/readme.txt
=== Varnish Caching === === Varnish Caching ===
Tags: varnish, purge, cache Donate link: www.paypal.com/use/email/razvan_stanga@yahoo.com
  Contributors: razvanstanga
  Tags: varnish, purge, cache, caching, optimization, performance, traffic
Requires at least: 4.0 Requires at least: 4.0
Tested up to: 4.3 Tested up to: 4.5
Stable tag: 3.7.3 Stable tag: 1.4.3
  License: GPLv2 or later
   
  Wordpress Varnish Cache 3.x/4.x integration
   
== Description == == Description ==
Varnish Cache Wordpress implementation Complete Wordpress Varnish Cache 3.x/4.x integration.
   
You can control from the Varnish Cache admin panel the following : This plugin handles all integration with Varnish Cache. It was designed for high traffic websites.
- Enable/Disable caching  
- Homepage cache TTL  
- Cache TTL (for every other page)  
- IPs/Hosts to clear cache to support every type of Varnish Cache implementation  
- Override default TTL in posts/pages  
- Purge key based PURGE  
- Debugging option  
   
Purges Varnish Cache when your site is modified. Main features
   
  * admin interface, see screenshots
  * console for manual purges, supports regular expressions so you can purge an entire folder or just a single file
  * supports every type of Varnish Cache implementation, see screenshots for examples
  * unlimited number of Varnish Cache servers
  * use of custom headers when communicating with Varnish Cache does not interfere with other caching plugins, cloudflare, etc
  * Varnish Cache configuration generator
  * purge key method so you don't need to setup ACLs
  * debugging
  * actively maintained
   
  You can control the following from the Varnish Caching admin panel :
   
  * Enable/Disable caching
  * Homepage cache TTL
  * Cache TTL (for every other page)
  * IPs/Hosts to clear cache to support every type of Varnish Cache implementation
  * Override default TTL in posts/pages
  * Purge key based PURGE
  * Logged in cookie
  * Debugging option
  * console for precise manual purges
   
  This plugin also auto purges Varnish Cache when your site is modified.
   
Varnish Caching sends a PURGE request to Varnish Cache when a page or post is modified. This occurs when editing, publishing, commenting or deleting an item, and when changing themes. Varnish Caching sends a PURGE request to Varnish Cache when a page or post is modified. This occurs when editing, publishing, commenting or deleting an item, and when changing themes.
   
<a href="https://www.varnish-cache.org/">Varnish</a> is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. This plugin <em>does not</em> install Varnish for you, nor does it configure Varnish for WordPress. It's expected you already did that on your own.  
   
Not all pages are purged every time, depending on your Varnish configuration. When a post, page, or custom post type is edited, or a new comment is added, <em>only</em> the following pages will purge: Not all pages are purged every time, depending on your Varnish configuration. When a post, page, or custom post type is edited, or a new comment is added, <em>only</em> the following pages will purge:
   
* The front page * The front page
* The post/page edited * The post/page edited
* Any categories or tags associated with the page * Any categories or tags associated with the page
   
  <a href="https://www.varnish-cache.org/">Varnish Cache</a> is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. This plugin <em>does not</em> install Varnish for you, nor does it configure Varnish for WordPress. It's expected you already did that on your own using the provided config files.
   
Inspired from the following : Inspired from the following :
- https://wordpress.org/plugins/varnish-http-purge/  
- https://github.com/dreamhost/varnish-vcl-collection/ * https://wordpress.org/plugins/varnish-http-purge/
  * https://github.com/dreamhost/varnish-vcl-collection/
   
Implemented on : Implemented on :
- www.bvoltaire.fr  
  * www.bvoltaire.fr
   
  == Installation ==
   
  * You must install Varnish Cache on your server(s)
  * Go to the configuration generator. Fill in the backends/ACLs then download the configuration files
  * Use these configuration files to configure Varnish Cache server(s). Usualy the configuration files are in /etc/varnish. In most cases you must put the downloaded configuration files in /etc/varnish and restart Varnish Cache
   
  Or use the provided Varnish Cache configuration files located in /wp-content/plugins/vcaching/varnish-conf folder.
   
  You can also use the purge key method if you can't setup ACLs. You must fill in lib/purge.vcl the purge key.
   
  == Frequently Asked Questions ==
   
  = What version of Varnish is supported? =
   
  This was built and tested on Varnish 3.x/4.x.
   
  = Why doesn't every page flush when I make a new post? =
   
  The only pages that should purge are the post's page, the front page, categories, and tags.
   
  = How do I manually purge the whole cache? =
   
  Click the 'Purge ALL Varnish Cache' button on the "Right Now" Dashboard.
   
  = How do I manually purge cache? =
   
  Use the console. For example you can purge the whole uploads folder with the URL /wp-content/uploads/.*
   
  = Does this work with W3 Total Cache? =
   
  Yes it does. This plugin uses its own custom headers to communicate with Varnish and does not interfere with the heders sent by W3 Total Cache or any other caching plugin.
   
  = Varnish Statistics =
   
  Statistics need a special setup. More info on the Statistics tab on your Wordpress environment.
   
  = How do I configure my Varnish Cache VCL? =
   
  Use the Varnish Cache configuration generator. Fill in the backends/ACLs then download your configuration files.
  Or use the provided Varnish Cache configuration files located in /wp-content/plugins/vcaching/varnish-conf folder.
   
  = Can I use this with a proxy service like CloudFlare? =
   
  Yes.
   
  = What is logged in cookie? =
   
  Logged in cookie is a special cookie this plugin sets upon user login. Varnish Cache uses this cookie to bypass caching for logged in users.
   
  This is a small step towards securing your site for denial of service attacks. Denial of service attacks can happen if the attacker bypasses Varnish Cache and hits the backend directly.
  With the current configuration and the way Wordpress works, this can still happen with POST/AJAX requests.
   
  == Changelog ==
   
  = 1.4.3 =
  * Truncate option added for too many 'trying to purge' messages. Added check for ZipArchive class to download VCLs.
   
  = 1.4.2 =
  * Bugfix release. Replaced home_url with plugins_url to show VCaching image
   
  = 1.4.1 =
  * Do not cache static files on admin domain
   
  = 1.4 =
  * Varnish Cache configuration generator
  * added `logged in cookie`. This replaces the logged in admin/user based on Wordpress standard cookies to bypass caching
  * moved backends to conf/backend.vcl
  * moved ACLs to conf/acl.vcl
  * updated VCLs. If you are using 1.3 VCLs should upgrade to 1.4
   
  = 1.3.3 =
  * support for Varnish 4
   
  = 1.3.2 =
  * bugfix displaying a single server stats
   
  = 1.3.1 =
  * better varnish statistics, generated by varnishstat
   
  = 1.3 =
  * varnish statistics
   
  = 1.2.3 =
  * wordpress 4.4 compatibility
  * Romanian language file
   
  = 1.2.1 =
  * wp cli
   
  = 1.2 =
  * console for precise manual purge
   
  = 1.1 =
  * Play nice with W3 Total Cache
   
  = 1.0 =
  * Initial commit
   
  == Upgrade Notice ==
   
  = 1.4 =
  Users using 1.3 Varnish Cache VCLs should upgrade to 1.4
   
  == Screenshots ==
   
  1. Settings admin panel
  2. Console/manual purge admin panel
  3. Varnish Cache Statistics admin panel
  4. Varnish Cache configuration generator admin panel
  5. override default TTL in posts/pages
  6. integration example
   
file:a/varnish-caching.php (deleted)
<?php  
/*  
Plugin Name: Varnish Caching  
Plugin URI: http://wordpress.org/extend/plugins/varnish-caching/  
Description: WordPress Varnish Cache integration.  
Version: 1.0  
Author: Razvan Stanga  
Author URI: http://git.razvi.ro/  
License: http://www.apache.org/licenses/LICENSE-2.0  
Text Domain: varnish-caching  
Network: true  
 
Copyright 2015: Razvan Stanga (email: varnish-caching@razvi.ro)  
*/  
 
class VarnishCaching {  
protected $blogId;  
protected $plugin = 'varnish-caching';  
protected $prefix = 'varnish_caching_';  
protected $purgeUrls = array();  
protected $varnishIp = null;  
protected $varnishHost = null;  
protected $dynamicHost = null;  
protected $ipsToHosts = array();  
protected $purgeKey = null;  
protected $getParam = 'purge_varnish_cache';  
protected $postTypes = array('page', 'post');  
protected $override = 0;  
protected $customFields = array();  
protected $noticeMessage = '';  
protected $debug = 0;  
 
public function __construct()  
{  
global $blog_id;  
defined($this->plugin) || define($this->plugin, true);  
 
$this->blogId = $blog_id;  
add_action('init', array(&$this, 'init'));  
add_action('activity_box_end', array($this, 'varnish_glance'), 100);  
 
$this->customFields = array(  
array(  
'name' => 'ttl',  
'title' => 'TTL',  
'description' => __('Not required. If filled in overrides default TTL of %s seconds. 0 means no caching.', $this->plugin),  
'type' => 'text',  
'scope' => array('post', 'page'),  
'capability' => 'manage_options'  
)  
);  
 
$this->setupIpsToHosts();  
$this->purgeKey = ($purgeKey = trim(get_option($this->prefix . 'purge_key'))) ? $purgeKey : null;  
$this->admin_menu();  
}  
 
public function init()  
{  
load_plugin_textdomain($this->plugin);  
 
add_action('wp', array($this, 'buffer_start'), 1000000);  
add_action('shutdown', array($this, 'buffer_end'), 1000000);  
 
$this->debug = get_option($this->prefix . 'debug');  
 
// send headers to varnish  
add_action('send_headers', array($this, 'send_headers'), 1000000);  
 
// register events to purge post  
foreach ($this->getRegisterEvents() as $event) {  
add_action($event, array($this, 'purge_post'), 10, 2);  
}  
 
// purge all cache  
if (isset($_GET[$this->getParam]) && check_admin_referer($this->plugin)) {  
if (get_option('permalink_structure') == '' && current_user_can('manage_options')) {  
add_action('admin_notices' , array($this, 'pretty_permalinks_message'));  
}  
if ($this->varnishIp == null) {  
add_action('admin_notices' , array($this, 'purge_message_no_ips'));  
} else {  
$this->purgeCache();  
}  
}  
 
if ($this->check_if_purgeable()) {  
add_action('admin_bar_menu', array($this, 'purge_varnish_cache_all_adminbar'), 100);  
}  
if ($this->override = get_option($this->prefix . 'override')) {  
add_action('admin_menu', array($this, 'createCustomFields'));  
add_action('save_post', array($this, 'saveCustomFields' ), 1, 2);  
}  
add_action('wp_enqueue_scripts', array($this, 'override_ttl'), 1000);  
add_action('wp_enqueue_scripts', array($this, 'override_homepage_ttl'), 1000);  
}  
 
public function override_ttl($post)  
{  
$postId = isset($GLOBALS['wp_the_query']->post->ID) ? $GLOBALS['wp_the_query']->post->ID : 0;  
if ($postId && (is_page() || is_single())) {  
$ttl = get_post_meta($postId, $this->prefix . 'ttl', true);  
Header('X-VC-TTL: ' . $ttl, true);  
}  
}  
 
public function override_homepage_ttl()  
{  
if (is_home() || is_front_page()) {  
$this->homepage_ttl = get_option($this->prefix . 'homepage_ttl');  
Header('X-VC-TTL: ' . $this->homepage_ttl, true);  
}  
}  
 
public function buffer_callback($buffer)  
{  
return $buffer;  
}  
 
public function buffer_start()  
{  
ob_start(array($this, "buffer_callback"));  
}  
 
public function buffer_end()  
{  
ob_end_flush();  
}  
 
protected function setupIpsToHosts()  
{  
$this->varnishIp = get_option($this->prefix . 'ips');  
$this->varnishHost = get_option($this->prefix . 'hosts');  
$this->dynamicHost = get_option($this->prefix . 'dynamic_host');  
$varnishIp = explode(',', $this->varnishIp);  
$varnishHost = explode(',', $this->varnishHost);  
foreach ($varnishIp as $key => $ip) {  
$this->ipsToHosts[] = array(  
'ip' => $ip,  
'host' => $this->dynamicHost ? $_SERVER['HTTP_HOST'] : $varnishHost[$key]  
);  
}  
}  
 
public function createCustomFields()  
{  
if (function_exists('add_meta_box')) {  
foreach ($this->postTypes as $postType) {  
add_meta_box($this->plugin, 'Varnish', array($this, 'displayCustomFields'), $postType, 'side', 'high');  
}  
}  
}  
 
public function saveCustomFields($post_id, $post)  
{  
if (!isset($_POST['vc-custom-fields_wpnonce']) || !wp_verify_nonce($_POST['vc-custom-fields_wpnonce'], 'vc-custom-fields'))  
return;  
if (!current_user_can('edit_post', $post_id))  
return;  
if (!in_array($post->post_type, $this->postTypes))  
return;  
foreach ($this->customFields as $customField) {  
if (current_user_can($customField['capability'], $post_id)) {  
if (isset($_POST[$this->prefix . $customField['name']]) && trim($_POST[$this->prefix . $customField['name']])) {  
$value = $_POST[$this->prefix . $customField['name']];  
update_post_meta($post_id, $this->prefix . $customField['name'], $_POST[$this->prefix . $customField['name']]);  
} else {  
delete_post_meta($post_id, $this->prefix . $customField['name']);  
}  
}  
}  
}  
 
public function displayCustomFields()  
{  
global $post;  
?>  
<?php  
wp_nonce_field('vc-custom-fields', 'vc-custom-fields_wpnonce', false, true);  
foreach ($this->customFields as $customField) {  
// Check scope  
$scope = $customField['scope'];  
$output = false;  
foreach ($scope as $scopeItem) {  
switch ($scopeItem) {  
default: {  
if ($post->post_type == $scopeItem)  
$output = true;  
break;  
}  
}  
if ($output) break;  
}  
// Check capability  
if (!current_user_can($customField['capability'], $post->ID))  
$output = false;  
// Output if allowed  
if ($output) { ?>  
<?php  
switch ($customField['type']) {  
case "checkbox": {  
// Checkbox  
echo '<p><strong>' . $customField['title'] . '</strong></p>';  
echo '<label class="screen-reader-text" for="' . $this->prefix . $customField['name'] . '">' . $customField['title'] . '</label>';  
echo '<p><input type="checkbox" name="' . $this->prefix . $customField['name'] . '" id="' . $this->prefix . $customField['name'] . '" value="yes"';  
if (get_post_meta( $post->ID, $this->prefix . $customField['name'], true ) == "yes")  
echo ' checked="checked"';  
echo '" style="width: auto;" /></p>';  
break;  
}  
default: {  
// Plain text field  
echo '<p><b>' . $customField['title'] . '</b></p>';  
$value = intval(get_post_meta($post->ID, $this->prefix . $customField[ 'name' ], true));  
$default_ttl = get_option($this->prefix . 'ttl');  
$value = $value ? $value : $default;  
echo '<p><input type="text" name="' . $this->prefix . $customField['name'] . '" id="' . $this->prefix . $customField['name'] . '" value="' . $value . '" /></p>';  
break;  
}  
}  
?>  
<?php if ($customField['description']) echo '<p>' . sprintf($customField['description'], $default_ttl) . '</p>'; ?>  
<?php  
}  
} ?>  
<?php  
}  
 
public function check_if_purgeable()  
{  
return (!is_multisite() && current_user_can('activate_plugins')) || current_user_can('manage_network') || (is_multisite() && !current_user_can('manage_network') && (SUBDOMAIN_INSTALL || (!SUBDOMAIN_INSTALL && (BLOG_ID_CURRENT_SITE != $this->blogId))));  
}  
 
public function purge_message()  
{  
echo '<div id="message" class="updated fade"><p><strong>' . __('Varnish message:', $this->plugin) . '</strong><br />' . $this->noticeMessage . '</p></div>';  
}  
 
public function purge_message_no_ips()  
{  
echo '<div id="message" class="error fade"><p><strong>' . __('Please set the IPs for Varnish!', $this->plugin) . '</strong></p></div>';  
}  
 
public function pretty_permalinks_message()  
{  
echo '<div id="message" class="error"><p>' . __('Varnish Caching requires you to use custom permalinks. Please go to the <a href="options-permalink.php">Permalinks Options Page</a> to configure them.', $this->plugin) . '</p></div>';  
}  
 
public function purge_varnish_cache_all_adminbar($admin_bar)  
{  
$admin_bar->add_menu( array(  
'id' => 'purge-all-varnish-cache',  
'title' => __('Purge ALL Varnish Cache', $this->plugin),  
'href' => wp_nonce_url(add_query_arg($this->getParam, 1), $this->plugin),  
'meta' => array(  
'title' => __('Purge ALL Varnish Cache', $this->plugin),  
),  
));  
}  
 
public function varnish_glance()  
{  
$url = wp_nonce_url(admin_url('?' . $this->getParam), $this->plugin);  
$button = '';  
$nopermission = '';  
if ($this->varnishIp == null) {  
$intro .= sprintf(__('Please setup Varnish IPs to be able to use <a href="%1$s">Varnish Caching</a>.', $this->plugin), 'http://wordpress.org/plugins/varnish-caching/');  
} else {  
$intro .= sprintf(__('<a href="%1$s">Varnish Caching</a> automatically purges your posts when published or updated. Sometimes you need a manual flush.', $this->plugin), 'http://wordpress.org/plugins/varnish-caching/');  
$button .= __('Press the button below to force it to purge your entire cache.', $this->plugin);  
$button .= '</p><p><span class="button"><a href="' . $url . '"><strong>';  
$button .= __('Purge ALL Varnish Cache', $this->plugin);  
$button .= '</strong></a></span>';  
$nopermission .= __('You do not have permission to purge the cache for the whole site. Please contact your adminstrator.', $this->plugin);  
}  
if ($this->check_if_purgeable()) {  
$text = $intro . ' ' . $button;  
} else {  
$text = $intro . ' ' . $nopermission;  
}  
echo '<p class="varnish-galce">' . $text . '</p>';  
}  
 
protected function getRegisterEvents() {  
return array(  
'save_post',  
'deleted_post',  
'trashed_post',  
'edit_post',  
'delete_attachment',  
'switch_theme',  
);  
}  
 
public function purgeCache() {  
$purgeUrls = array_unique($this->purgeUrls);  
 
if (empty($purgeUrls)) {  
if (isset($_GET[$this->getParam]) && current_user_can('manage_options') && check_admin_referer($this->plugin)) {  
$this->purgeUrl(home_url() .'/?vc-regex');  
}  
} else {  
foreach($purgeUrls as $url) {  
$this->purgeUrl($url);  
}  
}  
add_action('admin_notices' , array($this, 'purge_message'));  
}  
 
protected function purgeUrl($url) {  
$p = parse_url($url);  
 
if (isset($p['query']) && ($p['query'] == 'vc-regex')) {  
$pregex = '.*';  
$purgemethod = 'regex';  
} else {  
$pregex = '';  
$purgemethod = 'default';  
}  
 
if (isset($p['path'])) {  
$path = $p['path'];  
} else {  
$path = '';  
}  
 
$schema = apply_filters('varnish_http_purge_schema', 'http://');  
 
foreach ($this->ipsToHosts as $key => $ipToHost) {  
$purgeme = $schema . $ipToHost['ip'] . $path . $pregex;  
$headers = array('host' => $ipToHost['host'], 'X-VC-Purge-Method' => $purgemethod, 'X-VC-Purge-Host' => $ipToHost['host']);  
if (!is_null($this->purgeKey)) {  
$headers['X-VC-Purge-Key'] = $this->purgeKey;  
}  
$response = wp_remote_request($purgeme, array('method' => 'PURGE', 'headers' => $headers));  
if ($response instanceof WP_Error) {  
foreach ($response->errors as $error => $errors) {  
$this->noticeMessage .= '<br />Error ' . $error . '<br />';  
foreach ($errors as $error => $description) {  
$this->noticeMessage .= ' - ' . $description . '<br />';  
}  
}  
} else {  
$this->noticeMessage .= '<br />Trying to purge URL : ' . $purgeme;  
$message = preg_match("/<title>(.*)<\/title>/i", $response['body'], $matches);  
$this->noticeMessage .= ' => <br /> ' . isset($matches[1]) ? " => " . $matches[1] : $response['body'];  
$this->noticeMessage .= '<br />';  
if ($this->debug) {  
$this->noticeMessage .= $response['body'] . "<br />";  
}  
}  
}  
 
do_action('after_purge_url', $url, $purgeme);  
}  
 
public function purge_post($postId)  
{  
// If this is a valid post we want to purge the post, the home page and any associated tags & cats  
// If not, purge everything on the site.  
 
$validPostStatus = array('publish', 'trash');  
$thisPostStatus = get_post_status($postId);  
 
// If this is a revision, stop.  
if(get_permalink($postId) !== true && !in_array($thisPostStatus, $validPostStatus)) {  
return;  
} else {  
// array to collect all our URLs  
$listofurls = array();  
 
// Category purge based on Donnacha's work in WP Super Cache  
$categories = get_the_category($postId);  
if ($categories) {  
foreach ($categories as $cat) {  
array_push($listofurls, get_category_link( $cat->term_id));  
}  
}  
// Tag purge based on Donnacha's work in WP Super Cache  
$tags = get_the_tags($postId);  
if ($tags) {  
foreach ($tags as $tag) {  
array_push($listofurls, get_tag_link( $tag->term_id));  
}  
}  
 
// Author URL  
array_push($listofurls,  
get_author_posts_url(get_post_field( 'post_author', $postId)),  
get_author_feed_link(get_post_field( 'post_author', $postId))  
);  
 
// Archives and their feeds  
$archiveurls = array();  
if ( get_post_type_archive_link(get_post_type($postId)) == true) {  
array_push($listofurls,  
get_post_type_archive_link( get_post_type($postId)),  
get_post_type_archive_feed_link( get_post_type($postId))  
);  
}  
 
// Post URL  
array_push($listofurls, get_permalink($postId));  
 
// Feeds  
array_push($listofurls,  
get_bloginfo_rss('rdf_url') ,  
get_bloginfo_rss('rss_url') ,  
get_bloginfo_rss('rss2_url'),  
get_bloginfo_rss('atom_url'),  
get_bloginfo_rss('comments_rss2_url'),  
get_post_comments_feed_link($postId)  
);  
 
// Home Page and (if used) posts page  
array_push($listofurls, home_url('/'));  
if ( get_option('show_on_front') == 'page') {  
array_push($listofurls, get_permalink( get_option('page_for_posts')));  
}  
 
// Now flush all the URLs we've collected  
foreach ($listofurls as $url) {  
array_push($this->purgeUrls, $url) ;  
}  
 
}  
 
// Filter to add or remove urls to the array of purged urls  
// @param array $purgeUrls the urls (paths) to be purged  
// @param int $postId the id of the new/edited post  
$this->purgeUrls = apply_filters('vc_purge_urls', $this->purgeUrls, $postId);  
$this->purgeCache();  
}  
 
public function send_headers()  
{  
$enable = get_option($this->prefix . 'enable');  
if ($enable) {  
Header('X-VC-Enabled: true', true);  
$ttl = get_option($this->prefix . 'ttl');  
Header('X-VC-TTL: ' . $ttl, true);  
if ($debug = get_option($this->prefix . 'debug')) {  
Header('X-VC-Debug: true', true);  
}  
} else {  
Header('X-VC-Enabled: false', true);  
}  
}  
 
public function admin_menu()  
{  
add_action('admin_menu', array($this, 'add_menu_item'));  
add_action('admin_init', array($this, 'setting_page_fields'));  
}  
 
public function add_menu_item()  
{  
add_menu_page(__('Varnish Caching', $this->plugin), __('Varnish Caching', $this->plugin), 'manage_options', $this->plugin . '-options', array($this, 'settings_page'), home_url() . '/wp-content/plugins/' . $this->plugin . '/icon.png', 99);  
}  
 
public function settings_page()  
{  
?>  
<div class="wrap">  
<h1><?=__('Varnish Caching Options', $this->plugin)?></h1>  
<form method="post" action="options.php">  
<?php  
settings_fields('section');  
do_settings_sections($this->plugin . '-options');  
submit_button();  
?>  
</form>  
</div>  
<?php  
}  
 
public function setting_page_fields()  
{  
add_settings_section('section', 'Settings', null, $this->plugin . '-options');  
 
add_settings_field($this->prefix . "enable", __("Enable" , $this->plugin), array($this, $this->prefix . "enable"), $this->plugin . '-options', "section");  
add_settings_field($this->prefix . "homepage_ttl", __("Homepage cache TTL", $this->plugin), array($this, $this->prefix . "homepage_ttl"), $this->plugin . '-options', "section");  
add_settings_field($this->prefix . "ttl", __("Cache TTL", $this->plugin), array($this, $this->prefix . "ttl"), $this->plugin . '-options', "section");  
add_settings_field($this->prefix . "ips", __("IPs", $this->plugin), array($this, $this->prefix . "ips"), $this->plugin . '-options', "section");  
add_settings_field($this->prefix . "dynamic_host", __("Dynamic host", $this->plugin), array($this, $this->prefix . "dynamic_host"), $this->plugin . '-options', "section");  
if (!get_option($this->prefix . 'dynamic_host')) {  
add_settings_field($this->prefix . "hosts", __("Hosts", $this->plugin), array($this, $this->prefix . "hosts"), $this->plugin . '-options', "section");  
}  
add_settings_field($this->prefix . "override", __("Override default TTL", $this->plugin), array($this, $this->prefix . "override"), $this->plugin . '-options', "section");  
add_settings_field($this->prefix . "purge_key", __("Purge key", $this->plugin), array($this, $this->prefix . "purge_key"), $this->plugin . '-options', "section");  
add_settings_field($this->prefix . "debug", __("Enable debug", $this->plugin), array($this, $this->prefix . "debug"), $this->plugin . '-options', "section");  
 
register_setting("section", $this->prefix . "enable");  
register_setting("section", $this->prefix . "ttl");  
register_setting("section", $this->prefix . "homepage_ttl");  
register_setting("section", $this->prefix . "ips");  
register_setting("section", $this->prefix . "dynamic_host");  
register_setting("section", $this->prefix . "hosts");  
register_setting("section", $this->prefix . "override");  
register_setting("section", $this->prefix . "purge_key");  
register_setting("section", $this->prefix . "debug");  
}  
 
public function varnish_caching_enable()  
{  
?>  
<input type="checkbox" name="varnish_caching_enable" value="1" <?php checked(1, get_option($this->prefix . 'enable'), true); ?> />  
<p class="description"><?=__('Enable Varnish caching', $this->plugin)?></p>  
<?php  
}  
 
public function varnish_caching_homepage_ttl()  
{  
?>  
<input type="text" name="varnish_caching_homepage_ttl" id="varnish_caching_homepage_ttl" value="<?php echo get_option($this->prefix . 'homepage_ttl'); ?>" />  
<p class="description"><?=__('Time to live in seconds in Varnish cache for homepage', $this->plugin)?></p>  
<?php  
}  
 
public function varnish_caching_ttl()  
{  
?>  
<input type="text" name="varnish_caching_ttl" id="varnish_caching_ttl" value="<?php echo get_option($this->prefix . 'ttl'); ?>" />  
<p class="description"><?=__('Time to live in seconds in Varnish cache', $this->plugin)?></p>  
<?php  
}  
 
public function varnish_caching_ips()  
{  
?>  
<input type="text" name="varnish_caching_ips" id="varnish_caching_ips" size="100" value="<?php echo get_option($this->prefix . 'ips'); ?>" />  
<p class="description"><?=__('Comma separated ip/ip:port. Example : 192.168.0.2,192.168.0.3:8080', $this->plugin)?></p>  
<?php  
}  
 
public function varnish_caching_dynamic_host()  
{  
?>  
<input type="checkbox" name="varnish_caching_dynamic_host" value="1" <?php checked(1, get_option($this->prefix . 'dynamic_host'), true); ?> />  
<p class="description">  
<?=__('Uses the $_SERVER[\'HTTP_HOST\'] as hash for Varnish. This means the purge cache action will work on the domain you\'re on.<br />Use this option if you use only one domain.', $this->plugin)?>  
</p>  
<?php  
}  
 
public function varnish_caching_hosts()  
{  
?>  
<input type="text" name="varnish_caching_hosts" id="varnish_caching_hosts" size="100" value="<?php echo get_option($this->prefix . 'hosts'); ?>" />  
<p class="description">  
<?=__('Comma separated hostnames. Varnish uses the hostname to create the cache hash. For each IP, you must set a hostname.<br />Use this option if you use multiple domains.', $this->plugin)?>  
</p>  
<?php  
}  
 
public function varnish_caching_override()  
{  
?>  
<input type="checkbox" name="varnish_caching_override" value="1" <?php checked(1, get_option($this->prefix . 'override'), true); ?> />  
<p class="description"><?=__('Override default TTL on each post/page.', $this->plugin)?></p>  
<?php  
}  
 
public function varnish_caching_purge_key()  
{  
?>  
<input type="text" name="varnish_caching_purge_key" id="varnish_caching_purge_key" size="100" value="<?php echo get_option($this->prefix . 'purge_key'); ?>" />  
<p class="description">  
<?=__('Key used to purge Varnish cache. It is sent to Varnish as X-VC-Purge-Key header. Use a SHA-256 hash.<br />If you can\'t use ACL\'s, use this option.', $this->plugin)?>  
</p>  
<?php  
}  
 
public function varnish_caching_debug()  
{  
?>  
<input type="checkbox" name="varnish_caching_debug" value="1" <?php checked(1, get_option($this->prefix . 'debug'), true); ?> />  
<p class="description">  
<?=__('Send all debugging headers to the client. Also shows complete response from Varnish on purge all.', $this->plugin)?>  
</p>  
<?php  
}  
}  
 
$purger = new VarnishCaching();  
 
file:a/varnish-conf/LICENSE (deleted)
GNU GENERAL PUBLIC LICENSE  
Version 2, June 1991  
 
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,  
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA  
Everyone is permitted to copy and distribute verbatim copies  
of this license document, but changing it is not allowed.  
 
Preamble  
 
The licenses for most software are designed to take away your  
freedom to share and change it. By contrast, the GNU General Public  
License is intended to guarantee your freedom to share and change free  
software--to make sure the software is free for all its users. This  
General Public License applies to most of the Free Software  
Foundation's software and to any other program whose authors commit to  
using it. (Some other Free Software Foundation software is covered by  
the GNU Lesser General Public License instead.) You can apply it to  
your programs, too.  
 
When we speak of free software, we are referring to freedom, not  
price. Our General Public Licenses are designed to make sure that you  
have the freedom to distribute copies of free software (and charge for  
this service if you wish), that you receive source code or can get it  
if you want it, that you can change the software or use pieces of it  
in new free programs; and that you know you can do these things.  
 
To protect your rights, we need to make restrictions that forbid  
anyone to deny you these rights or to ask you to surrender the rights.  
These restrictions translate to certain responsibilities for you if you  
distribute copies of the software, or if you modify it.  
 
For example, if you distribute copies of such a program, whether  
gratis or for a fee, you must give the recipients all the rights that  
you have. You must make sure that they, too, receive or can get the  
source code. And you must show them these terms so they know their  
rights.  
 
We protect your rights with two steps: (1) copyright the software, and  
(2) offer you this license which gives you legal permission to copy,  
distribute and/or modify the software.  
 
Also, for each author's protection and ours, we want to make certain  
that everyone understands that there is no warranty for this free  
software. If the software is modified by someone else and passed on, we  
want its recipients to know that what they have is not the original, so  
that any problems introduced by others will not reflect on the original  
authors' reputations.  
 
Finally, any free program is threatened constantly by software  
patents. We wish to avoid the danger that redistributors of a free  
program will individually obtain patent licenses, in effect making the  
program proprietary. To prevent this, we have made it clear that any  
patent must be licensed for everyone's free use or not licensed at all.  
 
The precise terms and conditions for copying, distribution and  
modification follow.  
 
GNU GENERAL PUBLIC LICENSE  
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION  
 
0. This License applies to any program or other work which contains  
a notice placed by the copyright holder saying it may be distributed  
under the terms of this General Public License. The "Program", below,  
refers to any such program or work, and a "work based on the Program"  
means either the Program or any derivative work under copyright law:  
that is to say, a work containing the Program or a portion of it,  
either verbatim or with modifications and/or translated into another  
language. (Hereinafter, translation is included without limitation in  
the term "modification".) Each licensee is addressed as "you".  
 
Activities other than copying, distribution and modification are not  
covered by this License; they are outside its scope. The act of  
running the Program is not restricted, and the output from the Program  
is covered only if its contents constitute a work based on the  
Program (independent of having been made by running the Program).  
Whether that is true depends on what the Program does.  
 
1. You may copy and distribute verbatim copies of the Program's  
source code as you receive it, in any medium, provided that you  
conspicuously and appropriately publish on each copy an appropriate  
copyright notice and disclaimer of warranty; keep intact all the  
notices that refer to this License and to the absence of any warranty;  
and give any other recipients of the Program a copy of this License  
along with the Program.  
 
You may charge a fee for the physical act of transferring a copy, and  
you may at your option offer warranty protection in exchange for a fee.  
 
2. You may modify your copy or copies of the Program or any portion  
of it, thus forming a work based on the Program, and copy and  
distribute such modifications or work under the terms of Section 1  
above, provided that you also meet all of these conditions:  
 
a) You must cause the modified files to carry prominent notices  
stating that you changed the files and the date of any change.  
 
b) You must cause any work that you distribute or publish, that in  
whole or in part contains or is derived from the Program or any  
part thereof, to be licensed as a whole at no charge to all third  
parties under the terms of this License.  
 
c) If the modified program normally reads commands interactively  
when run, you must cause it, when started running for such  
interactive use in the most ordinary way, to print or display an  
announcement including an appropriate copyright notice and a  
notice that there is no warranty (or else, saying that you provide  
a warranty) and that users may redistribute the program under  
these conditions, and telling the user how to view a copy of this  
License. (Exception: if the Program itself is interactive but  
does not normally print such an announcement, your work based on  
the Program is not required to print an announcement.)  
 
These requirements apply to the modified work as a whole. If  
identifiable sections of that work are not derived from the Program,  
and can be reasonably considered independent and separate works in  
themselves, then this License, and its terms, do not apply to those  
sections when you distribute them as separate works. But when you  
distribute the same sections as part of a whole which is a work based  
on the Program, the distribution of the whole must be on the terms of  
this License, whose permissions for other licensees extend to the  
entire whole, and thus to each and every part regardless of who wrote it.  
 
Thus, it is not the intent of this section to claim rights or contest  
your rights to work written entirely by you; rather, the intent is to  
exercise the right to control the distribution of derivative or  
collective works based on the Program.  
 
In addition, mere aggregation of another work not based on the Program  
with the Program (or with a work based on the Program) on a volume of  
a storage or distribution medium does not bring the other work under  
the scope of this License.  
 
3. You may copy and distribute the Program (or a work based on it,  
under Section 2) in object code or executable form under the terms of  
Sections 1 and 2 above provided that you also do one of the following:  
 
a) Accompany it with the complete corresponding machine-readable  
source code, which must be distributed under the terms of Sections  
1 and 2 above on a medium customarily used for software interchange; or,  
 
b) Accompany it with a written offer, valid for at least three  
years, to give any third party, for a charge no more than your  
cost of physically performing source distribution, a complete  
machine-readable copy of the corresponding source code, to be  
distributed under the terms of Sections 1 and 2 above on a medium  
customarily used for software interchange; or,  
 
c) Accompany it with the information you received as to the offer  
to distribute corresponding source code. (This alternative is  
allowed only for noncommercial distribution and only if you  
received the program in object code or executable form with such  
an offer, in accord with Subsection b above.)  
 
The source code for a work means the preferred form of the work for  
making modifications to it. For an executable work, complete source  
code means all the source code for all modules it contains, plus any  
associated interface definition files, plus the scripts used to  
control compilation and installation of the executable. However, as a  
special exception, the source code distributed need not include  
anything that is normally distributed (in either source or binary  
form) with the major components (compiler, kernel, and so on) of the  
operating system on which the executable runs, unless that component  
itself accompanies the executable.  
 
If distribution of executable or object code is made by offering  
access to copy from a designated place, then offering equivalent  
access to copy the source code from the same place counts as  
distribution of the source code, even though third parties are not  
compelled to copy the source along with the object code.  
 
4. You may not copy, modify, sublicense, or distribute the Program  
except as expressly provided under this License. Any attempt  
otherwise to copy, modify, sublicense or distribute the Program is  
void, and will automatically terminate your rights under this License.  
However, parties who have received copies, or rights, from you under  
this License will not have their licenses terminated so long as such  
parties remain in full compliance.  
 
5. You are not required to accept this License, since you have not  
signed it. However, nothing else grants you permission to modify or  
distribute the Program or its derivative works. These actions are  
prohibited by law if you do not accept this License. Therefore, by  
modifying or distributing the Program (or any work based on the  
Program), you indicate your acceptance of this License to do so, and  
all its terms and conditions for copying, distributing or modifying  
the Program or works based on it.  
 
6. Each time you redistribute the Program (or any work based on the  
Program), the recipient automatically receives a license from the  
original licensor to copy, distribute or modify the Program subject to  
these terms and conditions. You may not impose any further  
restrictions on the recipients' exercise of the rights granted herein.  
You are not responsible for enforcing compliance by third parties to  
this License.  
 
7. If, as a consequence of a court judgment or allegation of patent  
infringement or for any other reason (not limited to patent issues),  
conditions are imposed on you (whether by court order, agreement or  
otherwise) that contradict the conditions of this License, they do not  
excuse you from the conditions of this License. If you cannot  
distribute so as to satisfy simultaneously your obligations under this  
License and any other pertinent obligations, then as a consequence you  
may not distribute the Program at all. For example, if a patent  
license would not permit royalty-free redistribution of the Program by  
all those who receive copies directly or indirectly through you, then  
the only way you could satisfy both it and this License would be to  
refrain entirely from distribution of the Program.  
 
If any portion of this section is held invalid or unenforceable under  
any particular circumstance, the balance of the section is intended to  
apply and the section as a whole is intended to apply in other  
circumstances.  
 
It is not the purpose of this section to induce you to infringe any  
patents or other property right claims or to contest validity of any  
such claims; this section has the sole purpose of protecting the  
integrity of the free software distribution system, which is  
implemented by public license practices. Many people have made  
generous contributions to the wide range of software distributed  
through that system in reliance on consistent application of that  
system; it is up to the author/donor to decide if he or she is willing  
to distribute software through any other system and a licensee cannot  
impose that choice.  
 
This section is intended to make thoroughly clear what is believed to  
be a consequence of the rest of this License.  
 
8. If the distribution and/or use of the Program is restricted in  
certain countries either by patents or by copyrighted interfaces, the  
original copyright holder who places the Program under this License  
may add an explicit geographical distribution limitation excluding  
those countries, so that distribution is permitted only in or among  
countries not thus excluded. In such case, this License incorporates  
the limitation as if written in the body of this License.  
 
9. The Free Software Foundation may publish revised and/or new versions  
of the General Public License from time to time. Such new versions will  
be similar in spirit to the present version, but may differ in detail to  
address new problems or concerns.  
 
Each version is given a distinguishing version number. If the Program  
specifies a version number of this License which applies to it and "any  
later version", you have the option of following the terms and conditions  
either of that version or of any later version published by the Free  
Software Foundation. If the Program does not specify a version number of  
this License, you may choose any version ever published by the Free Software  
Foundation.  
 
10. If you wish to incorporate parts of the Program into other free  
programs whose distribution conditions are different, write to the author  
to ask for permission. For software which is copyrighted by the Free  
Software Foundation, write to the Free Software Foundation; we sometimes  
make exceptions for this. Our decision will be guided by the two goals  
of preserving the free status of all derivatives of our free software and  
of promoting the sharing and reuse of software generally.  
 
NO WARRANTY  
 
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY  
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN  
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES  
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED  
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF  
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS  
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE  
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,  
REPAIR OR CORRECTION.  
 
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING  
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR  
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,  
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING  
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED  
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY  
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER  
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE  
POSSIBILITY OF SUCH DAMAGES.  
 
END OF TERMS AND CONDITIONS  
 
How to Apply These Terms to Your New Programs  
 
If you develop a new program, and you want it to be of the greatest  
possible use to the public, the best way to achieve this is to make it  
free software which everyone can redistribute and change under these terms.  
 
To do so, attach the following notices to the program. It is safest  
to attach them to the start of each source file to most effectively  
convey the exclusion of warranty; and each file should have at least  
the "copyright" line and a pointer to where the full notice is found.  
 
<one line to give the program's name and a brief idea of what it does.>  
Copyright (C) <year> <name of author>  
 
This program is free software; you can redistribute it and/or modify  
it under the terms of the GNU General Public License as published by  
the Free Software Foundation; either version 2 of the License, or  
(at your option) any later version.  
 
This program is distributed in the hope that it will be useful,  
but WITHOUT ANY WARRANTY; without even the implied warranty of  
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the  
GNU General Public License for more details.  
 
You should have received a copy of the GNU General Public License along  
with this program; if not, write to the Free Software Foundation, Inc.,  
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.  
 
Also add information on how to contact you by electronic and paper mail.  
 
If the program is interactive, make it output a short notice like this  
when it starts in an interactive mode:  
 
Gnomovision version 69, Copyright (C) year name of author  
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.  
This is free software, and you are welcome to redistribute it  
under certain conditions; type `show c' for details.  
 
The hypothetical commands `show w' and `show c' should show the appropriate  
parts of the General Public License. Of course, the commands you use may  
be called something other than `show w' and `show c'; they could even be  
mouse-clicks or menu items--whatever suits your program.  
 
You should also get your employer (if you work as a programmer) or your  
school, if any, to sign a "copyright disclaimer" for the program, if  
necessary. Here is a sample; alter the names:  
 
Yoyodyne, Inc., hereby disclaims all copyright interest in the program  
`Gnomovision' (which makes passes at compilers) written by James Hacker.  
 
<signature of Ty Coon>, 1 April 1989  
Ty Coon, President of Vice  
 
This General Public License does not permit incorporating your program into  
proprietary programs. If your program is a subroutine library, you may  
consider it more useful to permit linking proprietary applications with the  
library. If this is what you want to do, use the GNU Lesser General  
Public License instead of this License.  
 
file:a/varnish-conf/README.rst (deleted)
======================  
varnish-vcl-collection  
======================  
 
Collection of Varnish VCL files. The purpose of this collection is to make  
it easier to configure varnish for some common setups and behaviors. Some  
of these files require you to define specific ACLs in your main VCL, and also  
note that the order of including files could change the behavior of Varnish.  
 
The main goal for this VCL Collection is to provide a simple config with just  
a few options that can make Varnish work for the majority of sites. Most of  
the "configuration" is done by choosing which files to include and defining  
ACLs. We hope to provide a robust configuration that can be used with  
relatively little information or control over what is actually running on  
the backend. This is particularly useful for managed web hosts who want  
to have customers benefit from the performance of a caching proxy without  
limiting what can run on the web backend and without customizing the  
configuration for each customer.  
 
See `wordpress-example.vcl` for an example of how to use this collection  
of VCLs to configure Varnish for a WordPress site.  
 
 
CloudFlare  
==========  
 
If you use CloudFlare and the backend is running `mod_cloudflare` (for Apache)  
or `http_realip_module` (for Nginx), then you should use `lib/cloudflare.vcl`.  
 
CloudFlare uses the HTTP Header `CF-Connecting-IP` to store the original  
client IP address. Note that unlike the `X-Forwarded-For` Header, this just  
contains the original IP address, not the entire forward chain.  
 
If you are using a CloudFlare Railgun server, or have any other trusted proxy  
servers between Varnish and CloudFlare, you will need to specify them in the  
`cloudflare` ACL.  
 
Also note that you will need to make sure that Varnish's IP is configured  
as trusted in `mod_cloudflare` or the `http_realip_module` on the backend.  
 
Example usage::  
 
include "lib/cloudflare.vcl";  
 
acl cloudflare {  
# put the IP of your Railgun (or proxy) server here  
# "1.2.3.4";  
}  
 
 
Mobile Device Optimizaiton  
==========================  
 
Different applications optimize for mobile devices in different ways. The  
best way is to use an "adaptive" design so that the same HTML is served to  
both desktop and mobile devices. If your application is "adaptive", then  
no special Varnish config is necessary; all devices will access the same  
objects in the Varnish cache.  
 
However, if your application does serve different content to different  
devices, then you'll need to handle that in Varnish. Since applications  
do mobile device detection differently, the VCL code included here is  
intentionally limited and simple. Crafting a custom configuration to handle  
the way your application treats mobile devices will usually give better  
results than using one of the following standard configs.  
 
`lib/mobile_cache.vcl` simply adds the string `mobile` to the hash data to  
give mobile devices a separate cache from non-mobile devices. This is only  
viable if your application serves just 2 different versions of each page  
depending on if the visitor is on a mobile device or not (and if the  
application uses the same method to detect mobile devices). Any disagreement  
between `mobile_cache.vcl` and your backend on what User-Agents should be  
considered "mobile" could mean that the incorrect versions of pages are  
served to some visitors.  
 
`lib/mobile_pass.vcl` simply disables caching for mobile devices. This is  
not good for performance, but will at least will prevent serving the  
incorrect version of pages to mobile visitors.  
 
 
HTTP Purging  
============  
 
Include `lib/purge.vcl` to allow purging pages from the cache using the HTTP  
PURGE method. This uses the ban feature of varnish and will make bans take  
advantage of Varnish's ban-lurker. You will need to specify a `purge` ACL  
so that only requests coming from your application are allowed to purge.  
 
Example usage::  
 
include "lib/purge.vcl";  
 
acl purge {  
# include the IP of your app if it isn't on localhost  
"localhost";  
"127.0.0.1";  
}  
 
There are several different possible behaviors of HTTP purging which can be  
controlled with the X-Purge-Method HTTP header. This config will be smart  
and attempt to automatically pick the best method based on the URL if you  
don't use an X-Purge-Method header. See the comments in `lib/purge.vcl` for  
details.  
You can also use the X-VC-Purge-Key method. Generate a MD5/SHA-256 hash and fill it on line  
if (req.http.X-VC-Purge-Key == "hash-to-be-filled-in") {  
in lib/purge.vcl. Then use the same hash in Varnish Caching WP admin.  
 
 
Static File Caching  
===================  
 
Include `lib/static.vcl` to use a simple set of rules to cache static files.  
This will ignore the query string part of request URLs, and discard all  
cookies for these requests. This will also cache static files for 24 hours.  
 
The cache behavior for this vcl can be bypassed by adding `nocache` to the  
url. For example, `http://example.com/foo.jpg?nocache` will always  
retrieve the file from the backend instead of serving from the cache.  
 
 
Big Files  
=========  
 
Varnish cannot cache files larger than the entire cache. Additionally, a few  
large files could potentially fill up the cache and force many more small  
files to be removed from the cache. Use `lib/bigfiles.vcl` or  
`lib/bigfiles_pipe.vcl` to prevent caching files larger than 10 MB. This  
size was chosen because this should allow most common website assets to be  
cached. Files larger than 10 MB such as videos, long podcasts, or binary  
downloads are better suited to be served with a CDN or some server separate  
from your main web application. This config will still allow Varnish to  
serve these large files, but the files will always be retrieved from the  
backend.  
 
`lib/bigfiles.vcl` marks files with `hit_for_pass` when they are above the  
size threshold. However this only works in Varnish 3.0.3 or later. Earlier  
versions of Varnish will instead show an internal server error when this  
method is used. In the case of these older versions of Varnish, you should  
use `lib/bigfiles_pipe.vcl`, which instead pipes the request.  
 
Your main VCL must have `import std;`. This import line is not included  
within the files themselves because having an import multiple times in a  
Varnish config (counting all included files) produces a compile error.  
 
Example usage::  
 
import std;  
include "lib/bigfiles.vcl";  
 
backend default {  
.host = "192.168.0.2";  
.port = "80";  
}  
 
import std;  
 
include "lib/xforward.vcl";  
include "lib/cloudflare.vcl";  
include "lib/purge.vcl";  
include "lib/bigfiles.vcl";  
include "lib/static.vcl";  
 
acl cloudflare {  
# set this ip to your Railgun IP (if applicable)  
# "1.2.3.4";  
}  
 
acl purge {  
"localhost";  
"127.0.0.1";  
#"192.168.0.2";  
}  
 
# Pick just one of the following:  
# (or don't use either of these if your application is "adaptive")  
# include "lib/mobile_cache.vcl";  
# include "lib/mobile_pass.vcl";  
 
### WordPress-specific config ###  
sub vcl_recv {  
# pipe on weird http methods  
if (req.request !~ "^GET|HEAD|PUT|POST|TRACE|OPTIONS|DELETE$") {  
return(pipe);  
}  
 
# redirect yourdomain.com to www.yourdomain.com  
if (req.http.host ~ "^yourdomain\.com$") {  
error 750 "http://www.yourdomain.com" + req.url;  
}  
 
# if you use a subdomain for wp-admin, do not cache it  
if (req.http.host ~ "admin.yourdomain.com") {  
return(pass);  
}  
 
### Check for reasons to bypass the cache!  
# never cache anything except GET/HEAD  
if (req.request != "GET" && req.request != "HEAD") {  
return(pass);  
}  
 
# don't cache logged-in users or authors  
if (req.http.Cookie ~ "wp-postpass_|wordpress_logged_in_|comment_author|PHPSESSID") {  
set req.http.X-VC-GotSession = "true";  
return(pass);  
}  
 
# don't cache ajax requests  
if (req.http.X-Requested-With == "XMLHttpRequest") {  
return(pass);  
}  
 
# don't cache these special pages  
if (req.url ~ "nocache|wp-admin|wp-(comments-post|login|activate|mail)\.php|bb-admin|server-status|control\.php|bb-login\.php|bb-reset-password\.php|register\.php") {  
return(pass);  
}  
 
### looks like we might actually cache it!  
# fix up the request  
set req.grace = 2m;  
set req.url = regsub(req.url, "\?replytocom=.*$", "");  
 
# strip query parameters from all urls (so they cache as a single object)  
# be carefull using this option  
#if (req.url ~ "\?.*") {  
# set req.url = regsub(req.url, "\?.*", "");  
#}  
 
# Remove has_js, Google Analytics __*, and wooTracker cookies.  
set req.http.Cookie = regsuball(req.http.Cookie, "(^|;\s*)(__[a-z]+|has_js|wooTracker)=[^;]*", "");  
set req.http.Cookie = regsub(req.http.Cookie, "^;\s*", "");  
if (req.http.Cookie ~ "^\s*$") {  
unset req.http.Cookie;  
}  
 
return(lookup);  
}  
 
sub vcl_hash {  
# Add the browser cookie only if a WordPress cookie found.  
if (req.http.Cookie ~ "wp-postpass_|wordpress_logged_in_|comment_author|PHPSESSID") {  
hash_data(req.http.Cookie);  
}  
}  
 
sub vcl_fetch {  
# make sure grace is at least 2 minutes  
if (beresp.grace < 2m) {  
set beresp.grace = 2m;  
}  
 
# overwrite ttl with X-VC-TTL  
if (beresp.http.X-VC-TTL) {  
set beresp.ttl = std.duration(beresp.http.X-VC-TTL + "s", 0s);  
}  
 
# catch obvious reasons we can't cache  
if (beresp.http.Set-Cookie) {  
set beresp.ttl = 0s;  
}  
 
# You don't wish to cache content for logged in users  
if (req.http.Cookie ~ "wp-postpass_|wordpress_logged_in_|comment_author|PHPSESSID") {  
set beresp.http.X-VC-Cacheable = "NO:Got Session";  
return(hit_for_pass);  
 
# Varnish determined the object was not cacheable  
} else if (beresp.ttl <= 0s) {  
set beresp.http.X-VC-Cacheable = "NO:Not Cacheable";  
return(hit_for_pass);  
 
# You are respecting the Cache-Control=private header from the backend  
} else if (beresp.http.Cache-Control ~ "private") {  
set beresp.http.X-VC-Cacheable = "NO:Cache-Control=private";  
return(hit_for_pass);  
 
# You are respecting the X-VC-Enabled=true header from the backend  
} else if (beresp.http.X-VC-Enabled ~ "true") {  
set beresp.http.X-VC-Cacheable = "YES";  
 
# Do not cache object  
} else if (beresp.http.X-VC-Enabled ~ "false") {  
set beresp.http.X-VC-Cacheable = "NO:Disabled";  
set beresp.ttl = 0s;  
}  
 
# Avoid caching error responses  
if (beresp.status == 404 || beresp.status >= 500) {  
set beresp.ttl = 0s;  
set beresp.grace = 15s;  
}  
 
# Deliver the content  
return(deliver);  
}  
 
sub vcl_error {  
if (obj.status == 750) {  
set obj.http.Location = obj.response;  
set obj.status = 302;  
return(deliver);  
}  
}  
 
# bigfiles.vcl -- Bypass Cache for Large Files  
 
sub vcl_fetch {  
# Bypass cache for files > 10 MB  
if (std.integer(beresp.http.Content-Length, 0) > 10485760) {  
return (hit_for_pass);  
}  
}  
 
# bigfiles_pipe.vcl -- Pipe for Large Files  
 
# You must have "import std;" in your main vcl:  
# import std;  
 
# NOTE: Using restart and pipe is a workaround for a bug in varnish prior to  
# 3.0.3. In 3.0.3+, hit_for_pass in vcl_fetch is all that is necessary.  
 
sub vcl_recv {  
if (req.http.X-Pipe-Big-File && req.restarts > 0) {  
unset req.http.X-Pipe-Big-File;  
return (pipe);  
}  
}  
 
sub vcl_fetch {  
# Bypass cache for files > 10 MB  
if (std.integer(beresp.http.Content-Length, 0) > 10485760) {  
set req.http.X-Pipe-Big-File = "Yes";  
return (restart);  
}  
}  
 
# cloudflare.vcl -- CloudFlare HTTP Headers  
 
# This should generally be loaded first to make sure that the headers  
# get set appropriately for all requests.  
 
acl official_cloudflare {  
# https://www.cloudflare.com/ips-v4  
"204.93.240.0"/24;  
"204.93.177.0"/24;  
"199.27.128.0"/21;  
"173.245.48.0"/20;  
"103.21.244.0"/22;  
"103.22.200.0"/22;  
"103.31.4.0"/22;  
"141.101.64.0"/18;  
"108.162.192.0"/18;  
"190.93.240.0"/20;  
"188.114.96.0"/20;  
"197.234.240.0"/22;  
"198.41.128.0"/17;  
"162.158.0.0"/15;  
# https://www.cloudflare.com/ips-v6  
"2400:cb00::"/32;  
"2606:4700::"/32;  
"2803:f800::"/32;  
"2405:b500::"/32;  
"2405:8100::"/32;  
}  
 
sub vcl_recv {  
# Set the CF-Connecting-IP header  
# If the client.ip is trusted, we leave the header alone if present.  
if (req.http.CF-Connecting-IP) {  
if (client.ip !~ official_cloudflare && client.ip !~ cloudflare) {  
set req.http.CF-Connecting-IP = client.ip;  
}  
} else {  
set req.http.CF-Connecting-IP = client.ip;  
}  
}  
 
# mobile_cache.vcl -- Separate cache for mobile clients  
 
# If the User-Agent looks like a mobile device, then we add the string  
# "mobile" to the hash_data. This results in mobile devices having  
# a separate cache from non-mobile devices.  
#  
# Note that if the backend does anything more sophisticated than having  
# a "desktop" and a "mobile" version of pages (for example serving one  
# page to iPhones and another to Androids), this will not be desirable.  
# Also if the backend disagrees with this logic as far as what is a  
# "mobile" User-Agent, then we may save the wrong version of pages in  
# the cache.  
 
sub vcl_hash {  
# General User-Agent list (anything that remotely looks like a mobile device)  
if (req.http.User-Agent ~ "(?i)ipod|android|blackberry|phone|mobile|kindle|silk|fennec|tablet|webos|palm|windows ce|nokia|philips|samsung|sanyo|sony|panasonic|ericsson|alcatel|series60|series40|opera mini|opera mobi|au-mic|audiovox|avantgo|blazer|danger|docomo|epoc|ericy|i-mode|ipaq|midp-|mot-|netfront|nitro|pocket|portalmmm|rover|sie-|symbian|cldc-|j2me|up\.browser|up\.link|vodafone|wap1\.|wap2\.") {  
hash_data("mobile");  
}  
}  
 
# mobile_pass.vcl -- Mobile pass-through support for Varnish  
 
# This simply bypasses the cache for anything that looks like a mobile  
# (or tablet) device.  
# Also passes through some requests that are specifically for the WordPress  
# Jetpack mobile plugin.  
 
sub vcl_recv {  
# Rules specifically for the Jetpack Mobile module  
if (req.url ~ "\?(.*&)?(ak_action|app-download)=") {  
return(pass);  
}  
if (req.http.Cookie ~ "(^|;\s*)akm_mobile=") {  
return(pass);  
}  
 
# General User-Agent blacklist (anything that remotely looks like a mobile device)  
if (req.http.User-Agent ~ "(?i)ipod|android|blackberry|phone|mobile|kindle|silk|fennec|tablet|webos|palm|windows ce|nokia|philips|samsung|sanyo|sony|panasonic|ericsson|alcatel|series60|series40|opera mini|opera mobi|au-mic|audiovox|avantgo|blazer|danger|docomo|epoc|ericy|i-mode|ipaq|midp-|mot-|netfront|nitro|pocket|portalmmm|rover|sie-|symbian|cldc-|j2me|up\.browser|up\.link|vodafone|wap1\.|wap2\.") {  
return(pass);  
}  
}  
 
# purge.vcl -- Cache Purge Library for Varnish  
 
# Regex purging  
# Treat the request URL as a regular expression.  
sub purge_regex {  
ban("obj.http.X-VC-Req-URL ~ " + req.url + " && obj.http.X-VC-Req-Host == " + req.http.host);  
}  
 
# Exact purging  
# Use the exact request URL (including any query params)  
sub purge_exact {  
ban("obj.http.X-VC-Req-URL == " + req.url + " && obj.http.X-VC-Req-Host == " + req.http.host);  
}  
 
# Page purging (default)  
# Use the exact request URL, but ignore any query params  
sub purge_page {  
set req.url = regsub(req.url, "\?.*$", "");  
ban("obj.http.X-VC-Req-URL-Base == " + req.url + " && obj.http.X-VC-Req-Host == " + req.http.host);  
}  
 
# The purge behavior can be controlled with the X-VC-Purge-Method header.  
#  
# Setting the X-VC-Purge-Method header to contain "regex" or "exact" will use  
# those respective behaviors. Any other value for the X-Purge header will  
# use the default ("page") behavior.  
#  
# The X-VC-Purge-Method header is not case-sensitive.  
#  
# If no X-VC-Purge-Method header is set, the request url is inspected to attempt  
# a best guess as to what purge behavior is expected. This should work for  
# most cases, although if you want to guarantee some behavior you should  
# always set the X-VC-Purge-Method header.  
 
sub vcl_recv {  
if (req.request == "PURGE") {  
if (req.http.X-VC-Purge-Key == "ff93c3cb929cee86901c7eefc8088e9511c005492c6502a930360c02221cf8f4") {  
set req.http.X-VC-Purge-Key-Auth = "true";  
} else {  
set req.http.X-VC-Purge-Key-Auth = "false";  
}  
if (client.ip !~ purge && req.http.X-VC-Purge-Key-Auth != "true") {  
error 405 "Not allowed from " + client.ip;  
}  
 
if (req.http.X-VC-Purge-Method) {  
if (req.http.X-VC-Purge-Method ~ "(?i)regex") {  
call purge_regex;  
} elsif (req.http.X-VC-Purge-Method ~ "(?i)exact") {  
call purge_exact;  
} else {  
call purge_page;  
}  
} else {  
# No X-Purge-Method header was specified.  
# Do our best to figure out which one they want.  
if (req.url ~ "\.\*" || req.url ~ "^\^" || req.url ~ "\$$" || req.url ~ "\\[.?*+^$|()]") {  
call purge_regex;  
} elsif (req.url ~ "\?") {  
call purge_exact;  
} else {  
call purge_page;  
}  
}  
error 200 "Purged " + req.url + " " + req.http.host;  
}  
}  
 
sub vcl_fetch {  
set beresp.http.X-VC-Req-Host = req.http.host;  
set beresp.http.X-VC-Req-URL = req.url;  
set beresp.http.X-VC-Req-URL-Base = regsub(req.url, "\?.*$", "");  
}  
 
sub vcl_deliver {  
unset resp.http.X-VC-Req-Host;  
unset resp.http.X-VC-Req-URL;  
unset resp.http.X-VC-Req-URL-Base;  
 
if (obj.hits > 0) {  
set resp.http.X-VC-Cache = "HIT";  
} else {  
set resp.http.X-VC-Cache = "MISS";  
}  
 
if (resp.http.X-VC-Debug ~ "true") {  
set resp.http.X-VC-Hash = req.url+"#"+req.http.host;  
} else {  
unset resp.http.X-VC-Enabled;  
unset resp.http.X-VC-Cache;  
unset resp.http.X-VC-Debug;  
unset resp.http.X-VC-Cacheable;  
unset resp.http.X-VC-Purge-Key-Auth;  
unset resp.http.X-VC-TTL;  
unset resp.http.X-VC-GotSession;  
}  
}  
 
# static.vcl -- Static File Caching for Varnish  
 
sub vcl_recv {  
if (req.request ~ "^(GET|HEAD)$" && req.url ~ "\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)(\?.*)?$") {  
# disable this if you want  
if (req.url ~ "nocache") {  
return(pass);  
}  
set req.url = regsub(req.url, "\?.*$", "");  
# unset cookie only if no http auth  
if (!req.http.Authorization) {  
unset req.http.Cookie;  
}  
set req.grace = 2m;  
return(lookup);  
}  
}  
 
sub vcl_fetch {  
if (req.request ~ "^(GET|HEAD)$" && req.url ~ "\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)$") {  
# overwrite ttl with X-VC-TTL  
set beresp.http.X-VC-TTL = "24";  
set beresp.ttl = std.duration(beresp.http.X-VC-TTL + "h", 0s);  
set beresp.grace = 2m;  
}  
}  
 
# xforward.vcl -- X-Forwarded-For HTTP Headers  
 
# This should generally be loaded first to make sure that the headers  
# get set appropriately for all requests. Note that when using this  
# you MUST NOT fall through to the VCL default handler for vcl_recv  
# since that will run the code again, resulting in the client.ip  
# being added twice.  
 
sub vcl_recv {  
if (req.http.X-Forwarded-For) {  
set req.http.X-Forwarded-For =  
req.http.X-Forwarded-For + ", " + client.ip;  
} else {  
set req.http.X-Forwarded-For = client.ip;  
}  
}  
 
  GNU GENERAL PUBLIC LICENSE
  Version 2, June 1991
 
  Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
  Preamble
 
  The licenses for most software are designed to take away your
  freedom to share and change it. By contrast, the GNU General Public
  License is intended to guarantee your freedom to share and change free
  software--to make sure the software is free for all its users. This
  General Public License applies to most of the Free Software
  Foundation's software and to any other program whose authors commit to
  using it. (Some other Free Software Foundation software is covered by
  the GNU Lesser General Public License instead.) You can apply it to
  your programs, too.
 
  When we speak of free software, we are referring to freedom, not
  price. Our General Public Licenses are designed to make sure that you
  have the freedom to distribute copies of free software (and charge for
  this service if you wish), that you receive source code or can get it
  if you want it, that you can change the software or use pieces of it
  in new free programs; and that you know you can do these things.
 
  To protect your rights, we need to make restrictions that forbid
  anyone to deny you these rights or to ask you to surrender the rights.
  These restrictions translate to certain responsibilities for you if you
  distribute copies of the software, or if you modify it.
 
  For example, if you distribute copies of such a program, whether
  gratis or for a fee, you must give the recipients all the rights that
  you have. You must make sure that they, too, receive or can get the
  source code. And you must show them these terms so they know their
  rights.
 
  We protect your rights with two steps: (1) copyright the software, and
  (2) offer you this license which gives you legal permission to copy,
  distribute and/or modify the software.
 
  Also, for each author's protection and ours, we want to make certain
  that everyone understands that there is no warranty for this free
  software. If the software is modified by someone else and passed on, we
  want its recipients to know that what they have is not the original, so
  that any problems introduced by others will not reflect on the original
  authors' reputations.
 
  Finally, any free program is threatened constantly by software
  patents. We wish to avoid the danger that redistributors of a free
  program will individually obtain patent licenses, in effect making the
  program proprietary. To prevent this, we have made it clear that any
  patent must be licensed for everyone's free use or not licensed at all.
 
  The precise terms and conditions for copying, distribution and
  modification follow.
 
  GNU GENERAL PUBLIC LICENSE
  TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
  0. This License applies to any program or other work which contains
  a notice placed by the copyright holder saying it may be distributed
  under the terms of this General Public License. The "Program", below,
  refers to any such program or work, and a "work based on the Program"
  means either the Program or any derivative work under copyright law:
  that is to say, a work containing the Program or a portion of it,
  either verbatim or with modifications and/or translated into another
  language. (Hereinafter, translation is included without limitation in
  the term "modification".) Each licensee is addressed as "you".
 
  Activities other than copying, distribution and modification are not
  covered by this License; they are outside its scope. The act of
  running the Program is not restricted, and the output from the Program
  is covered only if its contents constitute a work based on the
  Program (independent of having been made by running the Program).
  Whether that is true depends on what the Program does.
 
  1. You may copy and distribute verbatim copies of the Program's
  source code as you receive it, in any medium, provided that you
  conspicuously and appropriately publish on each copy an appropriate
  copyright notice and disclaimer of warranty; keep intact all the
  notices that refer to this License and to the absence of any warranty;
  and give any other recipients of the Program a copy of this License
  along with the Program.
 
  You may charge a fee for the physical act of transferring a copy, and
  you may at your option offer warranty protection in exchange for a fee.
 
  2. You may modify your copy or copies of the Program or any portion
  of it, thus forming a work based on the Program, and copy and
  distribute such modifications or work under the terms of Section 1
  above, provided that you also meet all of these conditions:
 
  a) You must cause the modified files to carry prominent notices
  stating that you changed the files and the date of any change.
 
  b) You must cause any work that you distribute or publish, that in
  whole or in part contains or is derived from the Program or any
  part thereof, to be licensed as a whole at no charge to all third
  parties under the terms of this License.
 
  c) If the modified program normally reads commands interactively
  when run, you must cause it, when started running for such
  interactive use in the most ordinary way, to print or display an
  announcement including an appropriate copyright notice and a
  notice that there is no warranty (or else, saying that you provide
  a warranty) and that users may redistribute the program under
  these conditions, and telling the user how to view a copy of this
  License. (Exception: if the Program itself is interactive but
  does not normally print such an announcement, your work based on
  the Program is not required to print an announcement.)
 
  These requirements apply to the modified work as a whole. If
  identifiable sections of that work are not derived from the Program,
  and can be reasonably considered independent and separate works in
  themselves, then this License, and its terms, do not apply to those
  sections when you distribute them as separate works. But when you
  distribute the same sections as part of a whole which is a work based
  on the Program, the distribution of the whole must be on the terms of
  this License, whose permissions for other licensees extend to the
  entire whole, and thus to each and every part regardless of who wrote it.
 
  Thus, it is not the intent of this section to claim rights or contest
  your rights to work written entirely by you; rather, the intent is to
  exercise the right to control the distribution of derivative or
  collective works based on the Program.
 
  In addition, mere aggregation of another work not based on the Program
  with the Program (or with a work based on the Program) on a volume of
  a storage or distribution medium does not bring the other work under
  the scope of this License.
 
  3. You may copy and distribute the Program (or a work based on it,
  under Section 2) in object code or executable form under the terms of
  Sections 1 and 2 above provided that you also do one of the following:
 
  a) Accompany it with the complete corresponding machine-readable
  source code, which must be distributed under the terms of Sections
  1 and 2 above on a medium customarily used for software interchange; or,
 
  b) Accompany it with a written offer, valid for at least three
  years, to give any third party, for a charge no more than your
  cost of physically performing source distribution, a complete
  machine-readable copy of the corresponding source code, to be
  distributed under the terms of Sections 1 and 2 above on a medium
  customarily used for software interchange; or,
 
  c) Accompany it with the information you received as to the offer
  to distribute corresponding source code. (This alternative is
  allowed only for noncommercial distribution and only if you
  received the program in object code or executable form with such
  an offer, in accord with Subsection b above.)
 
  The source code for a work means the preferred form of the work for
  making modifications to it. For an executable work, complete source
  code means all the source code for all modules it contains, plus any
  associated interface definition files, plus the scripts used to
  control compilation and installation of the executable. However, as a
  special exception, the source code distributed need not include
  anything that is normally distributed (in either source or binary
  form) with the major components (compiler, kernel, and so on) of the
  operating system on which the executable runs, unless that component
  itself accompanies the executable.
 
  If distribution of executable or object code is made by offering
  access to copy from a designated place, then offering equivalent
  access to copy the source code from the same place counts as
  distribution of the source code, even though third parties are not
  compelled to copy the source along with the object code.
 
  4. You may not copy, modify, sublicense, or distribute the Program
  except as expressly provided under this License. Any attempt
  otherwise to copy, modify, sublicense or distribute the Program is
  void, and will automatically terminate your rights under this License.
  However, parties who have received copies, or rights, from you under
  this License will not have their licenses terminated so long as such
  parties remain in full compliance.
 
  5. You are not required to accept this License, since you have not
  signed it. However, nothing else grants you permission to modify or
  distribute the Program or its derivative works. These actions are
  prohibited by law if you do not accept this License. Therefore, by
  modifying or distributing the Program (or any work based on the
  Program), you indicate your acceptance of this License to do so, and
  all its terms and conditions for copying, distributing or modifying
  the Program or works based on it.
 
  6. Each time you redistribute the Program (or any work based on the
  Program), the recipient automatically receives a license from the
  original licensor to copy, distribute or modify the Program subject to
  these terms and conditions. You may not impose any further
  restrictions on the recipients' exercise of the rights granted herein.
  You are not responsible for enforcing compliance by third parties to
  this License.
 
  7. If, as a consequence of a court judgment or allegation of patent
  infringement or for any other reason (not limited to patent issues),
  conditions are imposed on you (whether by court order, agreement or
  otherwise) that contradict the conditions of this License, they do not
  excuse you from the conditions of this License. If you cannot
  distribute so as to satisfy simultaneously your obligations under this
  License and any other pertinent obligations, then as a consequence you
  may not distribute the Program at all. For example, if a patent
  license would not permit royalty-free redistribution of the Program by
  all those who receive copies directly or indirectly through you, then
  the only way you could satisfy both it and this License would be to
  refrain entirely from distribution of the Program.
 
  If any portion of this section is held invalid or unenforceable under
  any particular circumstance, the balance of the section is intended to
  apply and the section as a whole is intended to apply in other
  circumstances.
 
  It is not the purpose of this section to induce you to infringe any
  patents or other property right claims or to contest validity of any
  such claims; this section has the sole purpose of protecting the
  integrity of the free software distribution system, which is
  implemented by public license practices. Many people have made
  generous contributions to the wide range of software distributed
  through that system in reliance on consistent application of that
  system; it is up to the author/donor to decide if he or she is willing
  to distribute software through any other system and a licensee cannot
  impose that choice.
 
  This section is intended to make thoroughly clear what is believed to
  be a consequence of the rest of this License.
 
  8. If the distribution and/or use of the Program is restricted in
  certain countries either by patents or by copyrighted interfaces, the
  original copyright holder who places the Program under this License
  may add an explicit geographical distribution limitation excluding
  those countries, so that distribution is permitted only in or among
  countries not thus excluded. In such case, this License incorporates
  the limitation as if written in the body of this License.
 
  9. The Free Software Foundation may publish revised and/or new versions
  of the General Public License from time to time. Such new versions will
  be similar in spirit to the present version, but may differ in detail to
  address new problems or concerns.
 
  Each version is given a distinguishing version number. If the Program
  specifies a version number of this License which applies to it and "any
  later version", you have the option of following the terms and conditions
  either of that version or of any later version published by the Free
  Software Foundation. If the Program does not specify a version number of
  this License, you may choose any version ever published by the Free Software
  Foundation.
 
  10. If you wish to incorporate parts of the Program into other free
  programs whose distribution conditions are different, write to the author
  to ask for permission. For software which is copyrighted by the Free
  Software Foundation, write to the Free Software Foundation; we sometimes
  make exceptions for this. Our decision will be guided by the two goals
  of preserving the free status of all derivatives of our free software and
  of promoting the sharing and reuse of software generally.
 
  NO WARRANTY
 
  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
  FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
  OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
  PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
  OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
  TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
  PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
  REPAIR OR CORRECTION.
 
  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
  WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
  REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
  INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
  OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
  TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
  YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
  PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
  POSSIBILITY OF SUCH DAMAGES.
 
  END OF TERMS AND CONDITIONS
 
  How to Apply These Terms to Your New Programs
 
  If you develop a new program, and you want it to be of the greatest
  possible use to the public, the best way to achieve this is to make it
  free software which everyone can redistribute and change under these terms.
 
  To do so, attach the following notices to the program. It is safest
  to attach them to the start of each source file to most effectively
  convey the exclusion of warranty; and each file should have at least
  the "copyright" line and a pointer to where the full notice is found.
 
  <one line to give the program's name and a brief idea of what it does.>
  Copyright (C) <year> <name of author>
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
 
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU General Public License for more details.
 
  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
  Also add information on how to contact you by electronic and paper mail.
 
  If the program is interactive, make it output a short notice like this
  when it starts in an interactive mode:
 
  Gnomovision version 69, Copyright (C) year name of author
  Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
  This is free software, and you are welcome to redistribute it
  under certain conditions; type `show c' for details.
 
  The hypothetical commands `show w' and `show c' should show the appropriate
  parts of the General Public License. Of course, the commands you use may
  be called something other than `show w' and `show c'; they could even be
  mouse-clicks or menu items--whatever suits your program.
 
  You should also get your employer (if you work as a programmer) or your
  school, if any, to sign a "copyright disclaimer" for the program, if
  necessary. Here is a sample; alter the names:
 
  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
  `Gnomovision' (which makes passes at compilers) written by James Hacker.
 
  <signature of Ty Coon>, 1 April 1989
  Ty Coon, President of Vice
 
  This General Public License does not permit incorporating your program into
  proprietary programs. If your program is a subroutine library, you may
  consider it more useful to permit linking proprietary applications with the
  library. If this is what you want to do, use the GNU Lesser General
  Public License instead of this License.
 
  ======================
  varnish-vcl-collection
  ======================
 
  Collection of Varnish VCL files. The purpose of this collection is to make
  it easier to configure varnish for some common setups and behaviors. Some
  of these files require you to define specific ACLs in your main VCL, and also
  note that the order of including files could change the behavior of Varnish.
 
  The main goal for this VCL Collection is to provide a simple config with just
  a few options that can make Varnish work for the majority of sites. Most of
  the "configuration" is done by choosing which files to include and defining
  ACLs. We hope to provide a robust configuration that can be used with
  relatively little information or control over what is actually running on
  the backend. This is particularly useful for managed web hosts who want
  to have customers benefit from the performance of a caching proxy without
  limiting what can run on the web backend and without customizing the
  configuration for each customer.
 
  See `default.vcl` for an example of how to use this collection
  of VCLs to configure Varnish for a WordPress site.
 
 
  CloudFlare
  ==========
 
  If you use CloudFlare and the backend is running `mod_cloudflare` (for Apache)
  or `http_realip_module` (for Nginx), then you should use `lib/cloudflare.vcl`.
 
  CloudFlare uses the HTTP Header `CF-Connecting-IP` to store the original
  client IP address. Note that unlike the `X-Forwarded-For` Header, this just
  contains the original IP address, not the entire forward chain.
 
  If you are using a CloudFlare Railgun server, or have any other trusted proxy
  servers between Varnish and CloudFlare, you will need to specify them in the
  `cloudflare` ACL.
 
  Also note that you will need to make sure that Varnish's IP is configured
  as trusted in `mod_cloudflare` or the `http_realip_module` on the backend.
 
  Example usage::
 
  include "lib/cloudflare.vcl";
 
  acl cloudflare {
  # put the IP of your Railgun (or proxy) server here
  # "1.2.3.4";
  }
 
 
  Mobile Device Optimizaiton
  ==========================
 
  Different applications optimize for mobile devices in different ways. The
  best way is to use an "adaptive" design so that the same HTML is served to
  both desktop and mobile devices. If your application is "adaptive", then
  no special Varnish config is necessary; all devices will access the same
  objects in the Varnish cache.
 
  However, if your application does serve different content to different
  devices, then you'll need to handle that in Varnish. Since applications
  do mobile device detection differently, the VCL code included here is
  intentionally limited and simple. Crafting a custom configuration to handle
  the way your application treats mobile devices will usually give better
  results than using one of the following standard configs.
 
  `lib/mobile_cache.vcl` simply adds the string `mobile` to the hash data to
  give mobile devices a separate cache from non-mobile devices. This is only
  viable if your application serves just 2 different versions of each page
  depending on if the visitor is on a mobile device or not (and if the
  application uses the same method to detect mobile devices). Any disagreement
  between `mobile_cache.vcl` and your backend on what User-Agents should be
  considered "mobile" could mean that the incorrect versions of pages are
  served to some visitors.
 
  `lib/mobile_pass.vcl` simply disables caching for mobile devices. This is
  not good for performance, but will at least will prevent serving the
  incorrect version of pages to mobile visitors.
 
 
  HTTP Purging
  ============
 
  Include `lib/purge.vcl` to allow purging pages from the cache using the HTTP
  PURGE method. This uses the ban feature of varnish and will make bans take
  advantage of Varnish's ban-lurker. You will need to specify a `purge` ACL
  so that only requests coming from your application are allowed to purge.
 
  Example usage::
 
  include "lib/purge.vcl";
 
  acl purge {
  # include the IP of your app if it isn't on localhost
  "localhost";
  "127.0.0.1";
  }
 
  There are several different possible behaviors of HTTP purging which can be
  controlled with the X-VC-Purge-Method HTTP header. This config will be smart
  and attempt to automatically pick the best method based on the URL if you
  don't use an X-VC-Purge-Method header. See the comments in `lib/purge.vcl` for
  details.
  You can also use the X-VC-Purge-Key method. Generate a MD5/SHA-256 hash and fill it on line
  if (req.http.X-VC-Purge-Key == "hash-to-be-filled-in") {
  in lib/purge.vcl. Then use the same hash in Varnish Caching WP admin.
 
 
  Static File Caching
  ===================
 
  Include `lib/static.vcl` to use a simple set of rules to cache static files.
  This will ignore the query string part of request URLs, and discard all
  cookies for these requests. This will also cache static files for 24 hours.
 
  The cache behavior for this vcl can be bypassed by adding `nocache` to the
  url. For example, `http://example.com/foo.jpg?nocache` will always
  retrieve the file from the backend instead of serving from the cache.
 
 
  Big Files
  =========
 
  Varnish cannot cache files larger than the entire cache. Additionally, a few
  large files could potentially fill up the cache and force many more small
  files to be removed from the cache. Use `lib/bigfiles.vcl` or
  `lib/bigfiles_pipe.vcl` to prevent caching files larger than 10 MB. This
  size was chosen because this should allow most common website assets to be
  cached. Files larger than 10 MB such as videos, long podcasts, or binary
  downloads are better suited to be served with a CDN or some server separate
  from your main web application. This config will still allow Varnish to
  serve these large files, but the files will always be retrieved from the
  backend.
 
  `lib/bigfiles.vcl` marks files with `hit_for_pass` when they are above the
  size threshold. However this only works in Varnish 3.0.3 or later. Earlier
  versions of Varnish will instead show an internal server error when this
  method is used. In the case of these older versions of Varnish, you should
  use `lib/bigfiles_pipe.vcl`, which instead pipes the request.
 
  Your main VCL must have `import std;`. This import line is not included
  within the files themselves because having an import multiple times in a
  Varnish config (counting all included files) produces a compile error.
 
  Example usage::
 
  import std;
  include "lib/bigfiles.vcl";
 
  acl cloudflare {
  # set this ip to your Railgun IP (if applicable)
  # "1.2.3.4";
  }
 
  acl purge {
  "localhost";
  "127.0.0.1";
  #"192.168.0.2";
  }
  backend backend1 {
  .host = "192.168.0.2";
  .port = "80";
  }
 
  director backends round-robin {
  {
  .backend = backend1;
  }
  }
 
  sub vcl_recv {
  set req.backend = backends;
  }
  include "conf/backend.vcl";
  include "conf/acl.vcl";
 
  import std;
 
  include "lib/xforward.vcl";
  include "lib/cloudflare.vcl";
  include "lib/purge.vcl";
  include "lib/bigfiles.vcl";
  include "lib/static.vcl";
 
  # Pick just one of the following:
  # (or don't use either of these if your application is "adaptive")
  # include "lib/mobile_cache.vcl";
  # include "lib/mobile_pass.vcl";
 
  ### WordPress-specific config ###
  sub vcl_recv {
  # pipe on weird http methods
  if (req.request !~ "^GET|HEAD|PUT|POST|TRACE|OPTIONS|DELETE$") {
  return(pipe);
  }
 
  # redirect yourdomain.com to www.yourdomain.com
  #if (req.http.host ~ "^yourdomain\.com$") {
  # error 750 "http://www.yourdomain.com" + req.url;
  #}
 
  # if you use a subdomain for admin section, do not cache it
  #if (req.http.host ~ "admin.yourdomain.com") {
  # set req.http.X-VC-Cacheable = "NO:Admin domain";
  # return(pass);
  #}
 
  ### Check for reasons to bypass the cache!
  # never cache anything except GET/HEAD
  if (req.request != "GET" && req.request != "HEAD") {
  set req.http.X-VC-Cacheable = "NO:Request method:" + req.request;
  return(pass);
  }
 
  # don't cache logged-in users. you can set users `logged in cookie` name in settings
  if (req.http.Cookie ~ "c005492c65") {
  set req.http.X-VC-Cacheable = "NO:Found logged in cookie";
  return(pass);
  }
 
  # don't cache ajax requests
  if (req.http.X-Requested-With == "XMLHttpRequest") {
  set req.http.X-VC-Cacheable = "NO:Requested with: XMLHttpRequest";
  return(pass);
  }
 
  # don't cache these special pages. Not needed, left here as example
  #if (req.url ~ "nocache|wp-admin|wp-(comments-post|login|activate|mail)\.php|bb-admin|server-status|control\.php|bb-login\.php|bb-reset-password\.php|register\.php") {
  # set req.http.X-VC-Cacheable = "NO:Special page: " + req.url;
  # return(pass);
  #}
 
  ### looks like we might actually cache it!
  # fix up the request
  set req.grace = 2m;
  set req.url = regsub(req.url, "\?replytocom=.*$", "");
 
  # strip query parameters from all urls (so they cache as a single object)
  # be carefull using this option
  #if (req.url ~ "\?.*") {
  # set req.url = regsub(req.url, "\?.*", "");
  #}
 
  # Remove has_js, Google Analytics __*, and wooTracker cookies.
  set req.http.Cookie = regsuball(req.http.Cookie, "(^|;\s*)(__[a-z]+|has_js|wooTracker)=[^;]*", "");
  set req.http.Cookie = regsub(req.http.Cookie, "^;\s*", "");
  if (req.http.Cookie ~ "^\s*$") {
  unset req.http.Cookie;
  }
 
  return(lookup);
  }
 
  sub vcl_hash {
  set req.http.hash = req.url;
  if (req.http.host) {
  set req.http.hash = req.http.hash + "#" + req.http.host;
  } else {
  set req.http.hash = req.http.hash + "#" + server.ip;
  }
  # Add the browser cookie only if a WordPress cookie found. Not needed, left here as example
  #if (req.http.Cookie ~ "wp-postpass_|wordpress_logged_in_|comment_author|PHPSESSID") {
  # hash_data(req.http.Cookie);
  # set req.http.hash = req.http.hash + "#" + req.http.Cookie;
  #}
  }
 
  sub vcl_fetch {
  # make sure grace is at least 2 minutes
  if (beresp.grace < 2m) {
  set beresp.grace = 2m;
  }
 
  # overwrite ttl with X-VC-TTL
  if (beresp.http.X-VC-TTL) {
  set beresp.ttl = std.duration(beresp.http.X-VC-TTL + "s", 0s);
  }
 
  # catch obvious reasons we can't cache
  if (beresp.http.Set-Cookie) {
  set beresp.ttl = 0s;
  }
 
  # Don't cache object as instructed by header bereq.X-VC-Cacheable
  if (req.http.X-VC-Cacheable ~ "^NO") {
  set beresp.http.X-VC-Cacheable = req.http.X-VC-Cacheable;
  return(hit_for_pass);
 
  # Varnish determined the object was not cacheable
  } else if (beresp.ttl <= 0s) {
  if (!beresp.http.X-VC-Cacheable) {
  set beresp.http.X-VC-Cacheable = "NO:Not cacheable, ttl: "+ beresp.ttl;
  }
  return(hit_for_pass);
 
  # You are respecting the Cache-Control=private header from the backend
  } else if (beresp.http.Cache-Control ~ "private") {
  set beresp.http.X-VC-Cacheable = "NO:Cache-Control=private";
  return(hit_for_pass);
 
  # Cache object
  } else if (beresp.http.X-VC-Enabled ~ "true") {
  if (!beresp.http.X-VC-Cacheable) {
  set beresp.http.X-VC-Cacheable = "YES:Is cacheable, ttl: " + beresp.ttl;
  }
 
  # Do not cache object
  } else if (beresp.http.X-VC-Enabled ~ "false") {
  if (!beresp.http.X-VC-Cacheable) {
  set beresp.http.X-VC-Cacheable = "NO:Disabled";
  }
  set beresp.ttl = 0s;
  }
 
  # Avoid caching error responses
  if (beresp.status == 404 || beresp.status >= 500) {
  set beresp.ttl = 0s;
  set beresp.grace = 15s;
  }
 
  # Deliver the content
  return(deliver);
  }
 
  sub vcl_error {
  if (obj.status == 750) {
  set obj.http.Location = obj.response;
  set obj.status = 302;
  return(deliver);
  }
  }
 
  # bigfiles.vcl -- Bypass Cache for Large Files
 
  sub vcl_fetch {
  # Bypass cache for files > 10 MB
  if (std.integer(beresp.http.Content-Length, 0) > 10485760) {
  return (hit_for_pass);
  }
  }
 
  # bigfiles_pipe.vcl -- Pipe for Large Files
 
  # You must have "import std;" in your main vcl:
  # import std;
 
  # NOTE: Using restart and pipe is a workaround for a bug in varnish prior to
  # 3.0.3. In 3.0.3+, hit_for_pass in vcl_fetch is all that is necessary.
 
  sub vcl_recv {
  if (req.http.X-Pipe-Big-File && req.restarts > 0) {
  unset req.http.X-Pipe-Big-File;
  return (pipe);
  }
  }
 
  sub vcl_fetch {
  # Bypass cache for files > 10 MB
  if (std.integer(beresp.http.Content-Length, 0) > 10485760) {
  set req.http.X-Pipe-Big-File = "Yes";
  return (restart);
  }
  }
 
  # cloudflare.vcl -- CloudFlare HTTP Headers
 
  # This should generally be loaded first to make sure that the headers
  # get set appropriately for all requests.
 
  acl official_cloudflare {
  # https://www.cloudflare.com/ips-v4
  "204.93.240.0"/24;
  "204.93.177.0"/24;
  "199.27.128.0"/21;
  "173.245.48.0"/20;
  "103.21.244.0"/22;
  "103.22.200.0"/22;
  "103.31.4.0"/22;
  "141.101.64.0"/18;
  "108.162.192.0"/18;
  "190.93.240.0"/20;
  "188.114.96.0"/20;
  "197.234.240.0"/22;
  "198.41.128.0"/17;
  "162.158.0.0"/15;
  # https://www.cloudflare.com/ips-v6
  "2400:cb00::"/32;
  "2606:4700::"/32;
  "2803:f800::"/32;
  "2405:b500::"/32;
  "2405:8100::"/32;
  }
 
  sub vcl_recv {
  # Set the CF-Connecting-IP header
  # If the client.ip is trusted, we leave the header alone if present.
  if (req.http.CF-Connecting-IP) {
  if (client.ip !~ official_cloudflare && client.ip !~ cloudflare) {
  set req.http.CF-Connecting-IP = client.ip;
  }
  } else {
  set req.http.CF-Connecting-IP = client.ip;
  }
  }
 
  # mobile_cache.vcl -- Separate cache for mobile clients
 
  # If the User-Agent looks like a mobile device, then we add the string
  # "mobile" to the hash_data. This results in mobile devices having
  # a separate cache from non-mobile devices.
  #
  # Note that if the backend does anything more sophisticated than having
  # a "desktop" and a "mobile" version of pages (for example serving one
  # page to iPhones and another to Androids), this will not be desirable.
  # Also if the backend disagrees with this logic as far as what is a
  # "mobile" User-Agent, then we may save the wrong version of pages in
  # the cache.
 
  sub vcl_hash {
  # General User-Agent list (anything that remotely looks like a mobile device)
  if (req.http.User-Agent ~ "(?i)ipod|android|blackberry|phone|mobile|kindle|silk|fennec|tablet|webos|palm|windows ce|nokia|philips|samsung|sanyo|sony|panasonic|ericsson|alcatel|series60|series40|opera mini|opera mobi|au-mic|audiovox|avantgo|blazer|danger|docomo|epoc|ericy|i-mode|ipaq|midp-|mot-|netfront|nitro|pocket|portalmmm|rover|sie-|symbian|cldc-|j2me|up\.browser|up\.link|vodafone|wap1\.|wap2\.") {
  hash_data("mobile");
  }
  }
 
  # mobile_pass.vcl -- Mobile pass-through support for Varnish
 
  # This simply bypasses the cache for anything that looks like a mobile
  # (or tablet) device.
  # Also passes through some requests that are specifically for the WordPress
  # Jetpack mobile plugin.
 
  sub vcl_recv {
  # Rules specifically for the Jetpack Mobile module
  if (req.url ~ "\?(.*&)?(ak_action|app-download)=") {
  return(pass);
  }
  if (req.http.Cookie ~ "(^|;\s*)akm_mobile=") {
  return(pass);
  }
 
  # General User-Agent blacklist (anything that remotely looks like a mobile device)
  if (req.http.User-Agent ~ "(?i)ipod|android|blackberry|phone|mobile|kindle|silk|fennec|tablet|webos|palm|windows ce|nokia|philips|samsung|sanyo|sony|panasonic|ericsson|alcatel|series60|series40|opera mini|opera mobi|au-mic|audiovox|avantgo|blazer|danger|docomo|epoc|ericy|i-mode|ipaq|midp-|mot-|netfront|nitro|pocket|portalmmm|rover|sie-|symbian|cldc-|j2me|up\.browser|up\.link|vodafone|wap1\.|wap2\.") {
  return(pass);
  }
  }
 
  # purge.vcl -- Cache Purge Library for Varnish
 
  # Regex purging
  # Treat the request URL as a regular expression.
  sub purge_regex {
  ban("obj.http.X-VC-Req-URL ~ " + req.url + " && obj.http.X-VC-Req-Host == " + req.http.host);
  }
 
  # Exact purging
  # Use the exact request URL (including any query params)
  sub purge_exact {
  ban("obj.http.X-VC-Req-URL == " + req.url + " && obj.http.X-VC-Req-Host == " + req.http.host);
  }
 
  # Page purging (default)
  # Use the exact request URL, but ignore any query params
  sub purge_page {
  set req.url = regsub(req.url, "\?.*$", "");
  ban("obj.http.X-VC-Req-URL-Base == " + req.url + " && obj.http.X-VC-Req-Host == " + req.http.host);
  }
 
  # The purge behavior can be controlled with the X-VC-Purge-Method header.
  #
  # Setting the X-VC-Purge-Method header to contain "regex" or "exact" will use
  # those respective behaviors. Any other value for the X-Purge header will
  # use the default ("page") behavior.
  #
  # The X-VC-Purge-Method header is not case-sensitive.
  #
  # If no X-VC-Purge-Method header is set, the request url is inspected to attempt
  # a best guess as to what purge behavior is expected. This should work for
  # most cases, although if you want to guarantee some behavior you should
  # always set the X-VC-Purge-Method header.
 
  sub vcl_recv {
  set req.http.X-VC-My-Purge-Key = "ff93c3cb929cee86901c7eefc8088e9511c005492c6502a930360c02221cf8f4";
  if (req.request == "PURGE") {
  if (req.http.X-VC-Purge-Key == req.http.X-VC-My-Purge-Key) {
  set req.http.X-VC-Purge-Key-Auth = "true";
  } else {
  set req.http.X-VC-Purge-Key-Auth = "false";
  }
  if (client.ip !~ purge && req.http.X-VC-Purge-Key-Auth != "true") {
  error 405 "Not allowed from " + client.ip;
  }
 
  if (req.http.X-VC-Purge-Method) {
  if (req.http.X-VC-Purge-Method ~ "(?i)regex") {
  call purge_regex;
  } elsif (req.http.X-VC-Purge-Method ~ "(?i)exact") {
  call purge_exact;
  } else {
  call purge_page;
  }
  } else {
  # No X-VC-Purge-Method header was specified.
  # Do our best to figure out which one they want.
  if (req.url ~ "\.\*" || req.url ~ "^\^" || req.url ~ "\$$" || req.url ~ "\\[.?*+^$|()]") {
  call purge_regex;
  } elsif (req.url ~ "\?") {
  call purge_exact;
  } else {
  call purge_page;
  }
  }
  error 200 "Purged " + req.url + " " + req.http.host;
  }
  unset req.http.X-VC-My-Purge-Key;
  # unset Varnish Caching custom headers from client
  unset req.http.X-VC-Cacheable;
  unset req.http.X-VC-Debug;
  }
 
  sub vcl_fetch {
  set beresp.http.X-VC-Req-Host = req.http.host;
  set beresp.http.X-VC-Req-URL = req.url;
  set beresp.http.X-VC-Req-URL-Base = regsub(req.url, "\?.*$", "");
  }
 
  sub vcl_deliver {
  unset resp.http.X-VC-Req-Host;
  unset resp.http.X-VC-Req-URL;
  unset resp.http.X-VC-Req-URL-Base;
 
  if (obj.hits > 0) {
  set resp.http.X-VC-Cache = "HIT";
  } else {
  set resp.http.X-VC-Cache = "MISS";
  }
 
  if (req.http.X-VC-Debug ~ "true" || resp.http.X-VC-Debug ~ "true") {
  set resp.http.X-VC-Hash = req.http.hash;
  if (req.http.X-VC-DebugMessage) {
  set resp.http.X-VC-DebugMessage = req.http.X-VC-DebugMessage;
  }
  } else {
  unset resp.http.X-VC-Enabled;
  unset resp.http.X-VC-Cache;
  unset resp.http.X-VC-Debug;
  unset resp.http.X-VC-DebugMessage;
  unset resp.http.X-VC-Cacheable;
  unset resp.http.X-VC-Purge-Key-Auth;
  unset resp.http.X-VC-TTL;
  }
  }
 
  # static.vcl -- Static File Caching for Varnish
 
  sub vcl_recv {
  if (req.request ~ "^(GET|HEAD)$" && req.url ~ "\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)(\?.*)?$") {
  # if you use a subdomain for admin section, do not cache it
  #if (req.http.host ~ "admin.yourdomain.com") {
  # set req.http.X-VC-Cacheable = "NO:Admin domain";
  # return(pass);
  #}
  # enable this if you want
  #if (req.url ~ "debug") {
  # set req.http.X-VC-Debug = "true";
  #}
  # enable this if you need it
  #if (req.url ~ "nocache") {
  # set req.http.X-VC-Cacheable = "NO:Not cacheable, nocache in URL";
  # return(pass);
  #}
  set req.url = regsub(req.url, "\?.*$", "");
  # unset cookie only if no http auth
  if (!req.http.Authorization) {
  unset req.http.Cookie;
  }
  set req.grace = 2m;
  return(lookup);
  }
  }
 
  sub vcl_fetch {
  if (req.request ~ "^(GET|HEAD)$" && req.url ~ "\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)$") {
  # overwrite ttl with X-VC-TTL
  set beresp.http.X-VC-TTL = 24*60*60;
  set beresp.ttl = std.duration(beresp.http.X-VC-TTL + "s", 0s);
  set beresp.http.X-VC-Cacheable = "YES:Is cacheable, ttl: " + beresp.ttl;
  set beresp.grace = 2m;
  }
  }
 
  # xforward.vcl -- X-Forwarded-For HTTP Headers
 
  # This should generally be loaded first to make sure that the headers
  # get set appropriately for all requests. Note that when using this
  # you MUST NOT fall through to the VCL default handler for vcl_recv
  # since that will run the code again, resulting in the client.ip
  # being added twice.
 
  sub vcl_recv {
  if (req.http.X-Forwarded-For) {
  set req.http.X-Forwarded-For =
  req.http.X-Forwarded-For + ", " + client.ip;
  } else {
  set req.http.X-Forwarded-For = client.ip;
  }
  }
 
  GNU GENERAL PUBLIC LICENSE
  Version 2, June 1991
 
  Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
  Preamble
 
  The licenses for most software are designed to take away your
  freedom to share and change it. By contrast, the GNU General Public
  License is intended to guarantee your freedom to share and change free
  software--to make sure the software is free for all its users. This
  General Public License applies to most of the Free Software
  Foundation's software and to any other program whose authors commit to
  using it. (Some other Free Software Foundation software is covered by
  the GNU Lesser General Public License instead.) You can apply it to
  your programs, too.
 
  When we speak of free software, we are referring to freedom, not
  price. Our General Public Licenses are designed to make sure that you
  have the freedom to distribute copies of free software (and charge for
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  if you want it, that you can change the software or use pieces of it
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  To protect your rights, we need to make restrictions that forbid
  anyone to deny you these rights or to ask you to surrender the rights.
  These restrictions translate to certain responsibilities for you if you
  distribute copies of the software, or if you modify it.
 
  For example, if you distribute copies of such a program, whether
  gratis or for a fee, you must give the recipients all the rights that
  you have. You must make sure that they, too, receive or can get the
  source code. And you must show them these terms so they know their
  rights.
 
  We protect your rights with two steps: (1) copyright the software, and
  (2) offer you this license which gives you legal permission to copy,
  distribute and/or modify the software.
 
  Also, for each author's protection and ours, we want to make certain
  that everyone understands that there is no warranty for this free
  software. If the software is modified by someone else and passed on, we
  want its recipients to know that what they have is not the original, so
  that any problems introduced by others will not reflect on the original
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  Finally, any free program is threatened constantly by software
  patents. We wish to avoid the danger that redistributors of a free
  program will individually obtain patent licenses, in effect making the
  program proprietary. To prevent this, we have made it clear that any
  patent must be licensed for everyone's free use or not licensed at all.
 
  The precise terms and conditions for copying, distribution and
  modification follow.
 
  GNU GENERAL PUBLIC LICENSE
  TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
  0. This License applies to any program or other work which contains
  a notice placed by the copyright holder saying it may be distributed
  under the terms of this General Public License. The "Program", below,
  refers to any such program or work, and a "work based on the Program"
  means either the Program or any derivative work under copyright law:
  that is to say, a work containing the Program or a portion of it,
  either verbatim or with modifications and/or translated into another
  language. (Hereinafter, translation is included without limitation in
  the term "modification".) Each licensee is addressed as "you".
 
  Activities other than copying, distribution and modification are not
  covered by this License; they are outside its scope. The act of
  running the Program is not restricted, and the output from the Program
  is covered only if its contents constitute a work based on the
  Program (independent of having been made by running the Program).
  Whether that is true depends on what the Program does.
 
  1. You may copy and distribute verbatim copies of the Program's
  source code as you receive it, in any medium, provided that you
  conspicuously and appropriately publish on each copy an appropriate
  copyright notice and disclaimer of warranty; keep intact all the
  notices that refer to this License and to the absence of any warranty;
  and give any other recipients of the Program a copy of this License
  along with the Program.
 
  You may charge a fee for the physical act of transferring a copy, and
  you may at your option offer warranty protection in exchange for a fee.
 
  2. You may modify your copy or copies of the Program or any portion
  of it, thus forming a work based on the Program, and copy and
  distribute such modifications or work under the terms of Section 1
  above, provided that you also meet all of these conditions:
 
  a) You must cause the modified files to carry prominent notices
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  b) You must cause any work that you distribute or publish, that in
  whole or in part contains or is derived from the Program or any
  part thereof, to be licensed as a whole at no charge to all third
  parties under the terms of this License.
 
  c) If the modified program normally reads commands interactively
  when run, you must cause it, when started running for such
  interactive use in the most ordinary way, to print or display an
  announcement including an appropriate copyright notice and a
  notice that there is no warranty (or else, saying that you provide
  a warranty) and that users may redistribute the program under
  these conditions, and telling the user how to view a copy of this
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  the Program is not required to print an announcement.)
 
  These requirements apply to the modified work as a whole. If
  identifiable sections of that work are not derived from the Program,
  and can be reasonably considered independent and separate works in
  themselves, then this License, and its terms, do not apply to those
  sections when you distribute them as separate works. But when you
  distribute the same sections as part of a whole which is a work based
  on the Program, the distribution of the whole must be on the terms of
  this License, whose permissions for other licensees extend to the
  entire whole, and thus to each and every part regardless of who wrote it.
 
  Thus, it is not the intent of this section to claim rights or contest
  your rights to work written entirely by you; rather, the intent is to
  exercise the right to control the distribution of derivative or
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  In addition, mere aggregation of another work not based on the Program
  with the Program (or with a work based on the Program) on a volume of
  a storage or distribution medium does not bring the other work under
  the scope of this License.
 
  3. You may copy and distribute the Program (or a work based on it,
  under Section 2) in object code or executable form under the terms of
  Sections 1 and 2 above provided that you also do one of the following:
 
  a) Accompany it with the complete corresponding machine-readable
  source code, which must be distributed under the terms of Sections
  1 and 2 above on a medium customarily used for software interchange; or,
 
  b) Accompany it with a written offer, valid for at least three
  years, to give any third party, for a charge no more than your
  cost of physically performing source distribution, a complete
  machine-readable copy of the corresponding source code, to be
  distributed under the terms of Sections 1 and 2 above on a medium
  customarily used for software interchange; or,
 
  c) Accompany it with the information you received as to the offer
  to distribute corresponding source code. (This alternative is
  allowed only for noncommercial distribution and only if you
  received the program in object code or executable form with such
  an offer, in accord with Subsection b above.)
 
  The source code for a work means the preferred form of the work for
  making modifications to it. For an executable work, complete source
  code means all the source code for all modules it contains, plus any
  associated interface definition files, plus the scripts used to
  control compilation and installation of the executable. However, as a
  special exception, the source code distributed need not include
  anything that is normally distributed (in either source or binary
  form) with the major components (compiler, kernel, and so on) of the
  operating system on which the executable runs, unless that component
  itself accompanies the executable.
 
  If distribution of executable or object code is made by offering
  access to copy from a designated place, then offering equivalent
  access to copy the source code from the same place counts as
  distribution of the source code, even though third parties are not
  compelled to copy the source along with the object code.
 
  4. You may not copy, modify, sublicense, or distribute the Program
  except as expressly provided under this License. Any attempt
  otherwise to copy, modify, sublicense or distribute the Program is
  void, and will automatically terminate your rights under this License.
  However, parties who have received copies, or rights, from you under
  this License will not have their licenses terminated so long as such
  parties remain in full compliance.
 
  5. You are not required to accept this License, since you have not
  signed it. However, nothing else grants you permission to modify or
  distribute the Program or its derivative works. These actions are
  prohibited by law if you do not accept this License. Therefore, by
  modifying or distributing the Program (or any work based on the
  Program), you indicate your acceptance of this License to do so, and
  all its terms and conditions for copying, distributing or modifying
  the Program or works based on it.
 
  6. Each time you redistribute the Program (or any work based on the
  Program), the recipient automatically receives a license from the
  original licensor to copy, distribute or modify the Program subject to
  these terms and conditions. You may not impose any further
  restrictions on the recipients' exercise of the rights granted herein.
  You are not responsible for enforcing compliance by third parties to
  this License.
 
  7. If, as a consequence of a court judgment or allegation of patent
  infringement or for any other reason (not limited to patent issues),
  conditions are imposed on you (whether by court order, agreement or
  otherwise) that contradict the conditions of this License, they do not
  excuse you from the conditions of this License. If you cannot
  distribute so as to satisfy simultaneously your obligations under this
  License and any other pertinent obligations, then as a consequence you
  may not distribute the Program at all. For example, if a patent
  license would not permit royalty-free redistribution of the Program by
  all those who receive copies directly or indirectly through you, then
  the only way you could satisfy both it and this License would be to
  refrain entirely from distribution of the Program.
 
  If any portion of this section is held invalid or unenforceable under
  any particular circumstance, the balance of the section is intended to
  apply and the section as a whole is intended to apply in other
  circumstances.
 
  It is not the purpose of this section to induce you to infringe any
  patents or other property right claims or to contest validity of any
  such claims; this section has the sole purpose of protecting the
  integrity of the free software distribution system, which is
  implemented by public license practices. Many people have made
  generous contributions to the wide range of software distributed
  through that system in reliance on consistent application of that
  system; it is up to the author/donor to decide if he or she is willing
  to distribute software through any other system and a licensee cannot
  impose that choice.
 
  This section is intended to make thoroughly clear what is believed to
  be a consequence of the rest of this License.
 
  8. If the distribution and/or use of the Program is restricted in
  certain countries either by patents or by copyrighted interfaces, the
  original copyright holder who places the Program under this License
  may add an explicit geographical distribution limitation excluding
  those countries, so that distribution is permitted only in or among
  countries not thus excluded. In such case, this License incorporates
  the limitation as if written in the body of this License.
 
  9. The Free Software Foundation may publish revised and/or new versions
  of the General Public License from time to time. Such new versions will
  be similar in spirit to the present version, but may differ in detail to
  address new problems or concerns.
 
  Each version is given a distinguishing version number. If the Program
  specifies a version number of this License which applies to it and "any
  later version", you have the option of following the terms and conditions
  either of that version or of any later version published by the Free
  Software Foundation. If the Program does not specify a version number of
  this License, you may choose any version ever published by the Free Software
  Foundation.
 
  10. If you wish to incorporate parts of the Program into other free
  programs whose distribution conditions are different, write to the author
  to ask for permission. For software which is copyrighted by the Free
  Software Foundation, write to the Free Software Foundation; we sometimes
  make exceptions for this. Our decision will be guided by the two goals
  of preserving the free status of all derivatives of our free software and
  of promoting the sharing and reuse of software generally.
 
  NO WARRANTY
 
  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
  FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
  OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
  PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
  OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
  TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
  PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
  REPAIR OR CORRECTION.
 
  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
  WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
  REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
  INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
  OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
  TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
  YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
  PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
  POSSIBILITY OF SUCH DAMAGES.
 
  END OF TERMS AND CONDITIONS
 
  How to Apply These Terms to Your New Programs
 
  If you develop a new program, and you want it to be of the greatest
  possible use to the public, the best way to achieve this is to make it
  free software which everyone can redistribute and change under these terms.
 
  To do so, attach the following notices to the program. It is safest
  to attach them to the start of each source file to most effectively
  convey the exclusion of warranty; and each file should have at least
  the "copyright" line and a pointer to where the full notice is found.
 
  <one line to give the program's name and a brief idea of what it does.>
  Copyright (C) <year> <name of author>
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
 
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU General Public License for more details.
 
  You should have received a copy of the GNU General Public License along
  with this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
  Also add information on how to contact you by electronic and paper mail.
 
  If the program is interactive, make it output a short notice like this
  when it starts in an interactive mode:
 
  Gnomovision version 69, Copyright (C) year name of author
  Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
  This is free software, and you are welcome to redistribute it
  under certain conditions; type `show c' for details.
 
  The hypothetical commands `show w' and `show c' should show the appropriate
  parts of the General Public License. Of course, the commands you use may
  be called something other than `show w' and `show c'; they could even be
  mouse-clicks or menu items--whatever suits your program.
 
  You should also get your employer (if you work as a programmer) or your
  school, if any, to sign a "copyright disclaimer" for the program, if
  necessary. Here is a sample; alter the names:
 
  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
  `Gnomovision' (which makes passes at compilers) written by James Hacker.
 
  <signature of Ty Coon>, 1 April 1989
  Ty Coon, President of Vice
 
  This General Public License does not permit incorporating your program into
  proprietary programs. If your program is a subroutine library, you may
  consider it more useful to permit linking proprietary applications with the
  library. If this is what you want to do, use the GNU Lesser General
  Public License instead of this License.
 
  ======================
  varnish-vcl-collection
  ======================
 
  Collection of Varnish VCL files. The purpose of this collection is to make
  it easier to configure varnish for some common setups and behaviors. Some
  of these files require you to define specific ACLs in your main VCL, and also
  note that the order of including files could change the behavior of Varnish.
 
  The main goal for this VCL Collection is to provide a simple config with just
  a few options that can make Varnish work for the majority of sites. Most of
  the "configuration" is done by choosing which files to include and defining
  ACLs. We hope to provide a robust configuration that can be used with
  relatively little information or control over what is actually running on
  the backend. This is particularly useful for managed web hosts who want
  to have customers benefit from the performance of a caching proxy without
  limiting what can run on the web backend and without customizing the
  configuration for each customer.
 
  See `default.vcl` for an example of how to use this collection
  of VCLs to configure Varnish for a WordPress site.
 
 
  CloudFlare
  ==========
 
  If you use CloudFlare and the backend is running `mod_cloudflare` (for Apache)
  or `http_realip_module` (for Nginx), then you should use `lib/cloudflare.vcl`.
 
  CloudFlare uses the HTTP Header `CF-Connecting-IP` to store the original
  client IP address. Note that unlike the `X-Forwarded-For` Header, this just
  contains the original IP address, not the entire forward chain.
 
  If you are using a CloudFlare Railgun server, or have any other trusted proxy
  servers between Varnish and CloudFlare, you will need to specify them in the
  `cloudflare` ACL.
 
  Also note that you will need to make sure that Varnish's IP is configured
  as trusted in `mod_cloudflare` or the `http_realip_module` on the backend.
 
  Example usage::
 
  include "lib/cloudflare.vcl";
 
  acl cloudflare {
  # put the IP of your Railgun (or proxy) server here
  # "1.2.3.4";
  }
 
 
  Mobile Device Optimizaiton
  ==========================
 
  Different applications optimize for mobile devices in different ways. The
  best way is to use an "adaptive" design so that the same HTML is served to
  both desktop and mobile devices. If your application is "adaptive", then
  no special Varnish config is necessary; all devices will access the same
  objects in the Varnish cache.
 
  However, if your application does serve different content to different
  devices, then you'll need to handle that in Varnish. Since applications
  do mobile device detection differently, the VCL code included here is
  intentionally limited and simple. Crafting a custom configuration to handle
  the way your application treats mobile devices will usually give better
  results than using one of the following standard configs.
 
  `lib/mobile_cache.vcl` simply adds the string `mobile` to the hash data to
  give mobile devices a separate cache from non-mobile devices. This is only
  viable if your application serves just 2 different versions of each page
  depending on if the visitor is on a mobile device or not (and if the
  application uses the same method to detect mobile devices). Any disagreement
  between `mobile_cache.vcl` and your backend on what User-Agents should be
  considered "mobile" could mean that the incorrect versions of pages are
  served to some visitors.
 
  `lib/mobile_pass.vcl` simply disables caching for mobile devices. This is
  not good for performance, but will at least will prevent serving the
  incorrect version of pages to mobile visitors.
 
 
  HTTP Purging
  ============
 
  Include `lib/purge.vcl` to allow purging pages from the cache using the HTTP
  PURGE method. This uses the ban feature of varnish and will make bans take
  advantage of Varnish's ban-lurker. You will need to specify a `purge` ACL
  so that only requests coming from your application are allowed to purge.
 
  Example usage::
 
  include "lib/purge.vcl";
 
  acl purge {
  # include the IP of your app if it isn't on localhost
  "localhost";
  "127.0.0.1";
  }
 
  There are several different possible behaviors of HTTP purging which can be
  controlled with the X-VC-Purge-Method HTTP header. This config will be smart
  and attempt to automatically pick the best method based on the URL if you
  don't use an X-VC-Purge-Method header. See the comments in `lib/purge.vcl` for
  details.
  You can also use the X-VC-Purge-Key method. Generate a MD5/SHA-256 hash and fill it on line
  if (req.http.X-VC-Purge-Key == "hash-to-be-filled-in") {
  in lib/purge.vcl. Then use the same hash in Varnish Caching WP admin.
 
 
  Static File Caching
  ===================
 
  Include `lib/static.vcl` to use a simple set of rules to cache static files.
  This will ignore the query string part of request URLs, and discard all
  cookies for these requests. This will also cache static files for 24 hours.
 
  The cache behavior for this vcl can be bypassed by adding `nocache` to the
  url. For example, `http://example.com/foo.jpg?nocache` will always
  retrieve the file from the backend instead of serving from the cache.
 
 
  Big Files
  =========
 
  Varnish cannot cache files larger than the entire cache. Additionally, a few
  large files could potentially fill up the cache and force many more small
  files to be removed from the cache. Use `lib/bigfiles.vcl` or
  `lib/bigfiles_pipe.vcl` to prevent caching files larger than 10 MB. This
  size was chosen because this should allow most common website assets to be
  cached. Files larger than 10 MB such as videos, long podcasts, or binary
  downloads are better suited to be served with a CDN or some server separate
  from your main web application. This config will still allow Varnish to
  serve these large files, but the files will always be retrieved from the
  backend.
 
  `lib/bigfiles.vcl` marks files with `hit_for_pass` when they are above the
  size threshold. However this only works in Varnish 3.0.3 or later. Earlier
  versions of Varnish will instead show an internal server error when this
  method is used. In the case of these older versions of Varnish, you should
  use `lib/bigfiles_pipe.vcl`, which instead pipes the request.
 
  Your main VCL must have `import std;`. This import line is not included
  within the files themselves because having an import multiple times in a
  Varnish config (counting all included files) produces a compile error.
 
  Example usage::
 
  import std;
  include "lib/bigfiles.vcl";
 
  acl cloudflare {
  # set this ip to your Railgun IP (if applicable)
  # "1.2.3.4";
  }
 
  acl purge {
  "localhost";
  "127.0.0.1";
  #"192.168.0.2";
  }
  import directors;
 
  backend backend1 {
  .host = "192.168.0.2";
  .port = "80";
  }
 
  sub vcl_init {
  new backends = directors.round_robin();
  backends.add_backend(backend1);
  }
 
  sub vcl_recv {
  set req.backend_hint = backends.backend();
  }
 
  vcl 4.0;
 
  include "conf/backend.vcl";
  include "conf/acl.vcl";
 
  import std;
 
  include "lib/xforward.vcl";
  include "lib/cloudflare.vcl";
  include "lib/purge.vcl";
  include "lib/bigfiles.vcl";
  include "lib/static.vcl";
 
  # Pick just one of the following:
  # (or don't use either of these if your application is "adaptive")
  # include "lib/mobile_cache.vcl";
  # include "lib/mobile_pass.vcl";
 
  ### WordPress-specific config ###
  sub vcl_recv {
  # pipe on weird http methods
  if (req.method !~ "^GET|HEAD|PUT|POST|TRACE|OPTIONS|DELETE$") {
  return(pipe);
  }
 
  # redirect yourdomain.com to www.yourdomain.com
  #if (req.http.host ~ "^yourdomain\.com$") {
  # set req.http.X-VC-Redirect = "http://www.yourdomain.com" + req.url;
  # return (synth(750, "Moved permanently"));
  #}
 
  # if you use a subdomain for admin section, do not cache it
  #if (req.http.host ~ "admin.yourdomain.com") {
  # set req.http.X-VC-Cacheable = "NO:Admin domain";
  # return(pass);
  #}
 
  ### Check for reasons to bypass the cache!
  # never cache anything except GET/HEAD
  if (req.method != "GET" && req.method != "HEAD") {
  set req.http.X-VC-Cacheable = "NO:Request method:" + req.method;
  return(pass);
  }
 
  # don't cache logged-in users. you can set users `logged in cookie` name in settings
  if (req.http.Cookie ~ "c005492c65") {
  set req.http.X-VC-Cacheable = "NO:Found logged in cookie";
  return(pass);
  }
 
  # don't cache ajax requests
  if (req.http.X-Requested-With == "XMLHttpRequest") {
  set req.http.X-VC-Cacheable = "NO:Requested with: XMLHttpRequest";
  return(pass);
  }
 
  # don't cache these special pages. Not needed, left here as example
  #if (req.url ~ "nocache|wp-admin|wp-(comments-post|login|activate|mail)\.php|bb-admin|server-status|control\.php|bb-login\.php|bb-reset-password\.php|register\.php") {
  # set req.http.X-VC-Cacheable = "NO:Special page: " + req.url;
  # return(pass);
  #}
 
  ### looks like we might actually cache it!
  # fix up the request
  set req.url = regsub(req.url, "\?replytocom=.*$", "");
 
  # strip query parameters from all urls (so they cache as a single object)
  # be carefull using this option
  #if (req.url ~ "\?.*") {
  # set req.url = regsub(req.url, "\?.*", "");
  #}
 
  # Remove has_js, Google Analytics __*, and wooTracker cookies.
  set req.http.Cookie = regsuball(req.http.Cookie, "(^|;\s*)(__[a-z]+|has_js|wooTracker)=[^;]*", "");
  set req.http.Cookie = regsub(req.http.Cookie, "^;\s*", "");
  if (req.http.Cookie ~ "^\s*$") {
  unset req.http.Cookie;
  }
 
  return(hash);
  }
 
  sub vcl_hash {
  set req.http.hash = req.url;
  if (req.http.host) {
  set req.http.hash = req.http.hash + "#" + req.http.host;
  } else {
  set req.http.hash = req.http.hash + "#" + server.ip;
  }
  # Add the browser cookie only if cookie found. Not needed, left here as example
  #if (req.http.Cookie ~ "wp-postpass_|wordpress_logged_in_|comment_author|PHPSESSID") {
  # hash_data(req.http.Cookie);
  # set req.http.hash = req.http.hash + "#" + req.http.Cookie;
  #}
  }
 
  sub vcl_backend_response {
  # make sure grace is at least 2 minutes
  if (beresp.grace < 2m) {
  set beresp.grace = 2m;
  }
 
  # overwrite ttl with X-VC-TTL
  if (beresp.http.X-VC-TTL) {
  set beresp.ttl = std.duration(beresp.http.X-VC-TTL + "s", 0s);
  }
 
  # catch obvious reasons we can't cache
  if (beresp.http.Set-Cookie) {
  set beresp.ttl = 0s;
  }
 
  # Don't cache object as instructed by header bereq.X-VC-Cacheable
  if (bereq.http.X-VC-Cacheable ~ "^NO") {
  set beresp.http.X-VC-Cacheable = bereq.http.X-VC-Cacheable;
  set beresp.uncacheable = true;
  set beresp.ttl = 120s;
 
  # Varnish determined the object is not cacheable
  } else if (beresp.ttl <= 0s) {
  if (!beresp.http.X-VC-Cacheable) {
  set beresp.http.X-VC-Cacheable = "NO:Not cacheable, ttl: "+ beresp.ttl;
  }
  set beresp.uncacheable = true;
  set beresp.ttl = 120s;
 
  # You are respecting the Cache-Control=private header from the backend
  } else if (beresp.http.Cache-Control ~ "private") {
  set beresp.http.X-VC-Cacheable = "NO:Cache-Control=private";
  set beresp.uncacheable = true;
  set beresp.ttl = 120s;
 
  # Cache object
  } else if (beresp.http.X-VC-Enabled ~ "true") {
  if (!beresp.http.X-VC-Cacheable) {
  set beresp.http.X-VC-Cacheable = "YES:Is cacheable, ttl: " + beresp.ttl;
  }
 
  # Do not cache object
  } else if (beresp.http.X-VC-Enabled ~ "false") {
  if (!beresp.http.X-VC-Cacheable) {
  set beresp.http.X-VC-Cacheable = "NO:Disabled";
  }
  set beresp.ttl = 0s;
  }
 
  # Avoid caching error responses
  if (beresp.status == 404 || beresp.status >= 500) {
  set beresp.ttl = 0s;
  set beresp.grace = 15s;
  }
 
  # Deliver the content
  return(deliver);
  }
 
  sub vcl_synth {
  if (resp.status == 750) {
  set resp.http.Location = req.http.X-VC-Redirect;
  set resp.status = 302;
  return(deliver);
  }
  }
 
  # bigfiles.vcl -- Bypass Cache for Large Files
 
  sub vcl_backend_response {
  # Bypass cache for files > 10 MB
  if (std.integer(beresp.http.Content-Length, 0) > 10485760) {
  set beresp.uncacheable = true;
  set beresp.ttl = 120s;
  return (deliver);
  }
  }
 
  # bigfiles_pipe.vcl -- Pipe for Large Files
 
  # You must have "import std;" in your main vcl:
  # import std;
 
  # NOTE: Using restart and pipe is a workaround for a bug in varnish prior to
  # 3.0.3. In 3.0.3+, hit_for_pass in vcl_fetch is all that is necessary.
 
  sub vcl_recv {
  if (req.http.X-Pipe-Big-File && req.restarts > 0) {
  unset req.http.X-Pipe-Big-File;
  return (pipe);
  }
  }
 
  sub vcl_fetch {
  # Bypass cache for files > 10 MB
  if (std.integer(beresp.http.Content-Length, 0) > 10485760) {
  set req.http.X-Pipe-Big-File = "Yes";
  return (restart);
  }
  }
 
  # cloudflare.vcl -- CloudFlare HTTP Headers
 
  # This should generally be loaded first to make sure that the headers
  # get set appropriately for all requests.
 
  acl official_cloudflare {
  # https://www.cloudflare.com/ips-v4
  "204.93.240.0"/24;
  "204.93.177.0"/24;
  "199.27.128.0"/21;
  "173.245.48.0"/20;
  "103.21.244.0"/22;
  "103.22.200.0"/22;
  "103.31.4.0"/22;
  "141.101.64.0"/18;
  "108.162.192.0"/18;
  "190.93.240.0"/20;
  "188.114.96.0"/20;
  "197.234.240.0"/22;
  "198.41.128.0"/17;
  "162.158.0.0"/15;
  # https://www.cloudflare.com/ips-v6
  "2400:cb00::"/32;
  "2606:4700::"/32;
  "2803:f800::"/32;
  "2405:b500::"/32;
  "2405:8100::"/32;
  }
 
  sub vcl_recv {
  # Set the CF-Connecting-IP header
  # If the client.ip is trusted, we leave the header alone if present.
  if (req.http.CF-Connecting-IP) {
  if (client.ip !~ official_cloudflare && client.ip !~ cloudflare) {
  set req.http.CF-Connecting-IP = client.ip;
  }
  } else {
  set req.http.CF-Connecting-IP = client.ip;
  }
  }
 
  # mobile_cache.vcl -- Separate cache for mobile clients
 
  # If the User-Agent looks like a mobile device, then we add the string
  # "mobile" to the hash_data. This results in mobile devices having
  # a separate cache from non-mobile devices.
  #
  # Note that if the backend does anything more sophisticated than having
  # a "desktop" and a "mobile" version of pages (for example serving one
  # page to iPhones and another to Androids), this will not be desirable.
  # Also if the backend disagrees with this logic as far as what is a
  # "mobile" User-Agent, then we may save the wrong version of pages in
  # the cache.
 
  sub vcl_hash {
  # General User-Agent list (anything that remotely looks like a mobile device)
  if (req.http.User-Agent ~ "(?i)ipod|android|blackberry|phone|mobile|kindle|silk|fennec|tablet|webos|palm|windows ce|nokia|philips|samsung|sanyo|sony|panasonic|ericsson|alcatel|series60|series40|opera mini|opera mobi|au-mic|audiovox|avantgo|blazer|danger|docomo|epoc|ericy|i-mode|ipaq|midp-|mot-|netfront|nitro|pocket|portalmmm|rover|sie-|symbian|cldc-|j2me|up\.browser|up\.link|vodafone|wap1\.|wap2\.") {
  hash_data("mobile");
  }
  }
 
  # mobile_pass.vcl -- Mobile pass-through support for Varnish
 
  # This simply bypasses the cache for anything that looks like a mobile
  # (or tablet) device.
  # Also passes through some requests that are specifically for the WordPress
  # Jetpack mobile plugin.
 
  sub vcl_recv {
  # Rules specifically for the Jetpack Mobile module
  if (req.url ~ "\?(.*&)?(ak_action|app-download)=") {
  return(pass);
  }
  if (req.http.Cookie ~ "(^|;\s*)akm_mobile=") {
  return(pass);
  }
 
  # General User-Agent blacklist (anything that remotely looks like a mobile device)
  if (req.http.User-Agent ~ "(?i)ipod|android|blackberry|phone|mobile|kindle|silk|fennec|tablet|webos|palm|windows ce|nokia|philips|samsung|sanyo|sony|panasonic|ericsson|alcatel|series60|series40|opera mini|opera mobi|au-mic|audiovox|avantgo|blazer|danger|docomo|epoc|ericy|i-mode|ipaq|midp-|mot-|netfront|nitro|pocket|portalmmm|rover|sie-|symbian|cldc-|j2me|up\.browser|up\.link|vodafone|wap1\.|wap2\.") {
  return(pass);
  }
  }
 
  # purge.vcl -- Cache Purge Library for Varnish
 
  # Regex purging
  # Treat the request URL as a regular expression.
  sub purge_regex {
  ban("obj.http.X-VC-Req-URL ~ " + req.url + " && obj.http.X-VC-Req-Host == " + req.http.host);
  }
 
  # Exact purging
  # Use the exact request URL (including any query params)
  sub purge_exact {
  ban("obj.http.X-VC-Req-URL == " + req.url + " && obj.http.X-VC-Req-Host == " + req.http.host);
  }
 
  # Page purging (default)
  # Use the exact request URL, but ignore any query params
  sub purge_page {
  set req.url = regsub(req.url, "\?.*$", "");
  ban("obj.http.X-VC-Req-URL-Base == " + req.url + " && obj.http.X-VC-Req-Host == " + req.http.host);
  }
 
  # The purge behavior can be controlled with the X-VC-Purge-Method header.
  #
  # Setting the X-VC-Purge-Method header to contain "regex" or "exact" will use
  # those respective behaviors. Any other value for the X-Purge header will
  # use the default ("page") behavior.
  #
  # The X-VC-Purge-Method header is not case-sensitive.
  #
  # If no X-VC-Purge-Method header is set, the request url is inspected to attempt
  # a best guess as to what purge behavior is expected. This should work for
  # most cases, although if you want to guarantee some behavior you should
  # always set the X-VC-Purge-Method header.
 
  sub vcl_recv {
  set req.http.X-VC-My-Purge-Key = "ff93c3cb929cee86901c7eefc8088e9511c005492c6502a930360c02221cf8f4";
  if (req.method == "PURGE") {
  if (req.http.X-VC-Purge-Key == req.http.X-VC-My-Purge-Key) {
  set req.http.X-VC-Purge-Key-Auth = "true";
  } else {
  set req.http.X-VC-Purge-Key-Auth = "false";
  }
  if (client.ip !~ purge && req.http.X-VC-Purge-Key-Auth != "true") {
  return (synth(405, "Not allowed from " + client.ip));
  }
 
  if (req.http.X-VC-Purge-Method) {
  if (req.http.X-VC-Purge-Method ~ "(?i)regex") {
  call purge_regex;
  } elsif (req.http.X-VC-Purge-Method ~ "(?i)exact") {
  call purge_exact;
  } else {
  call purge_page;
  }
  } else {
  # No X-VC-Purge-Method header was specified.
  # Do our best to figure out which one they want.
  if (req.url ~ "\.\*" || req.url ~ "^\^" || req.url ~ "\$$" || req.url ~ "\\[.?*+^$|()]") {
  call purge_regex;
  } elsif (req.url ~ "\?") {
  call purge_exact;
  } else {
  call purge_page;
  }
  }
  return (synth(200,"Purged " + req.url + " " + req.http.host));
  }
  unset req.http.X-VC-My-Purge-Key;
  # unset Varnish Caching custom headers from client
  unset req.http.X-VC-Cacheable;
  unset req.http.X-VC-Debug;
  }
 
  sub vcl_backend_response {
  set beresp.http.X-VC-Req-Host = bereq.http.host;
  set beresp.http.X-VC-Req-URL = bereq.url;
  set beresp.http.X-VC-Req-URL-Base = regsub(bereq.url, "\?.*$", "");
  }
 
  sub vcl_deliver {
  unset resp.http.X-VC-Req-Host;
  unset resp.http.X-VC-Req-URL;
  unset resp.http.X-VC-Req-URL-Base;
 
  if (obj.hits > 0) {
  set resp.http.X-VC-Cache = "HIT";
  } else {
  set resp.http.X-VC-Cache = "MISS";
  }
 
  if (req.http.X-VC-Debug ~ "true" || resp.http.X-VC-Debug ~ "true") {
  set resp.http.X-VC-Hash = req.http.hash;
  if (req.http.X-VC-DebugMessage) {
  set resp.http.X-VC-DebugMessage = req.http.X-VC-DebugMessage;
  }
  } else {
  unset resp.http.X-VC-Enabled;
  unset resp.http.X-VC-Cache;
  unset resp.http.X-VC-Debug;
  unset resp.http.X-VC-DebugMessage;
  unset resp.http.X-VC-Cacheable;
  unset resp.http.X-VC-Purge-Key-Auth;
  unset resp.http.X-VC-TTL;
  }
  }
 
  # static.vcl -- Static File Caching for Varnish
 
  sub vcl_recv {
  if (req.method ~ "^(GET|HEAD)$" && req.url ~ "\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)(\?.*)?$") {
  # if you use a subdomain for admin section, do not cache it
  #if (req.http.host ~ "admin.yourdomain.com") {
  # set req.http.X-VC-Cacheable = "NO:Admin domain";
  # return(pass);
  #}
  # enable this if you want
  #if (req.url ~ "debug") {
  # set req.http.X-VC-Debug = "true";
  #}
  # enable this if you need it
  #if (req.url ~ "nocache") {
  # set req.http.X-VC-Cacheable = "NO:Not cacheable, nocache in URL";
  # return(pass);
  #}
  set req.url = regsub(req.url, "\?.*$", "");
  # unset cookie only if no http auth
  if (!req.http.Authorization) {
  unset req.http.Cookie;
  }
  return(hash);
  }
  }
 
  sub vcl_backend_response {
  if (bereq.method ~ "^(GET|HEAD)$" && bereq.url ~ "\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)$") {
  # overwrite ttl with X-VC-TTL
  set beresp.http.X-VC-TTL = 24*60*60;
  set beresp.ttl = std.duration(beresp.http.X-VC-TTL + "s", 0s);
  set beresp.http.X-VC-Cacheable = "YES:Is cacheable, ttl: " + beresp.ttl;
  }
  }
 
  # xforward.vcl -- X-Forwarded-For HTTP Headers
 
  # This should generally be loaded first to make sure that the headers
  # get set appropriately for all requests. Note that when using this
  # you MUST NOT fall through to the VCL default handler for vcl_recv
  # since that will run the code again, resulting in the client.ip
  # being added twice.
 
  sub vcl_recv {
  if (req.http.X-Forwarded-For) {
  set req.http.X-Forwarded-For =
  req.http.X-Forwarded-For + ", " + client.ip;
  } else {
  set req.http.X-Forwarded-For = client.ip;
  }
  }
 
file:b/vcaching.php (new)
  <?php
  /*
  Plugin Name: Varnish Caching
  Plugin URI: http://wordpress.org/extend/plugins/vcaching/
  Description: WordPress Varnish Cache integration.
  Version: 1.4.3
  Author: Razvan Stanga
  Author URI: http://git.razvi.ro/
  License: http://www.apache.org/licenses/LICENSE-2.0
  Text Domain: vcaching
  Network: true
 
  Copyright 2015: Razvan Stanga (email: varnish-caching@razvi.ro)
  */
 
  class VCaching {
  protected $blogId;
  protected $plugin = 'vcaching';
  protected $prefix = 'varnish_caching_';
  protected $purgeUrls = array();
  protected $varnishIp = null;
  protected $varnishHost = null;
  protected $dynamicHost = null;
  protected $ipsToHosts = array();
  protected $statsJsons = array();
  protected $purgeKey = null;
  protected $getParam = 'purge_varnish_cache';
  protected $postTypes = array('page', 'post');
  protected $override = 0;
  protected $customFields = array();
  protected $noticeMessage = '';
  protected $truncateNotice = false;
  protected $debug = 0;
 
  public function __construct()
  {
  global $blog_id;
  defined($this->plugin) || define($this->plugin, true);
 
  $this->blogId = $blog_id;
  add_action('init', array(&$this, 'init'));
  add_action('activity_box_end', array($this, 'varnish_glance'), 100);
 
  $this->customFields = array(
  array(
  'name' => 'ttl',
  'title' => 'TTL',
  'description' => __('Not required. If filled in overrides default TTL of %s seconds. 0 means no caching.', $this->plugin),
  'type' => 'text',
  'scope' => array('post', 'page'),
  'capability' => 'manage_options'
  )
  );
 
  $this->setupIpsToHosts();
  $this->purgeKey = ($purgeKey = trim(get_option($this->prefix . 'purge_key'))) ? $purgeKey : null;
  $this->admin_menu();
  }
 
  public function init()
  {
  load_plugin_textdomain($this->plugin, false, plugin_basename( dirname( __FILE__ ) ) . '/languages' );
 
  add_action('wp', array($this, 'buffer_start'), 1000000);
  add_action('shutdown', array($this, 'buffer_end'), 1000000);
 
  $this->truncateNotice = get_option($this->prefix . 'truncate_notice');
  $this->debug = get_option($this->prefix . 'debug');
 
  // send headers to varnish
  add_action('send_headers', array($this, 'send_headers'), 1000000);
 
  // logged in cookie
  add_action('wp_login', array($this, 'wp_login'), 1000000);
  add_action('wp_logout', array($this, 'wp_logout'), 1000000);
 
  // register events to purge post
  foreach ($this->getRegisterEvents() as $event) {
  add_action($event, array($this, 'purge_post'), 10, 2);
  }
 
  // purge all cache
  if (isset($_GET[$this->getParam]) && check_admin_referer($this->plugin)) {
  if (get_option('permalink_structure') == '' && current_user_can('manage_options')) {
  add_action('admin_notices' , array($this, 'pretty_permalinks_message'));
  }
  if ($this->varnishIp == null) {
  add_action('admin_notices' , array($this, 'purge_message_no_ips'));
  } else {
  $this->purgeCache();
  }
  }
 
  if ($this->check_if_purgeable()) {
  add_action('admin_bar_menu', array($this, 'purge_varnish_cache_all_adminbar'), 100);
  }
  if ($this->override = get_option($this->prefix . 'override')) {
  add_action('admin_menu', array($this, 'createCustomFields'));
  add_action('save_post', array($this, 'saveCustomFields' ), 1, 2);
  add_action('wp_enqueue_scripts', array($this, 'override_ttl'), 1000);
  }
  add_action('wp_enqueue_scripts', array($this, 'override_homepage_ttl'), 1000);
 
  // console purge
  if (isset($_POST['varnish_caching_purge_url'])) {
  $this->purgeUrl(home_url() . $_POST['varnish_caching_purge_url']);
  add_action('admin_notices' , array($this, 'purge_message'));
  }
  }
 
  public function override_ttl($post)
  {
  $postId = isset($GLOBALS['wp_the_query']->post->ID) ? $GLOBALS['wp_the_query']->post->ID : 0;
  if ($postId && (is_page() || is_single())) {
  $ttl = get_post_meta($postId, $this->prefix . 'ttl', true);
  if (trim($ttl) != '') {
  Header('X-VC-TTL: ' . intval($ttl), true);
  }
  }
  }
 
  public function override_homepage_ttl()
  {
  if (is_home() || is_front_page()) {
  $this->homepage_ttl = get_option($this->prefix . 'homepage_ttl');
  Header('X-VC-TTL: ' . intval($this->homepage_ttl), true);
  }
  }
 
  public function buffer_callback($buffer)
  {
  return $buffer;
  }
 
  public function buffer_start()
  {
  ob_start(array($this, "buffer_callback"));
  }
 
  public function buffer_end()
  {
  ob_end_flush();
  }
 
  protected function setupIpsToHosts()
  {
  $this->varnishIp = get_option($this->prefix . 'ips');
  $this->varnishHost = get_option($this->prefix . 'hosts');
  $this->dynamicHost = get_option($this->prefix . 'dynamic_host');
  $this->statsJsons = get_option($this->prefix . 'stats_json_file');
  $varnishIp = explode(',', $this->varnishIp);
  $varnishHost = explode(',', $this->varnishHost);
  $statsJsons = explode(',', $this->statsJsons);
  foreach ($varnishIp as $key => $ip) {
  $this->ipsToHosts[] = array(
  'ip' => $ip,
  'host' => $this->dynamicHost ? $_SERVER['HTTP_HOST'] : $varnishHost[$key],
  'statsJson' => isset($statsJsons[$key]) ? $statsJsons[$key] : null
  );
  }
  }
 
  public function createCustomFields()
  {
  if (function_exists('add_meta_box')) {
  foreach ($this->postTypes as $postType) {
  add_meta_box($this->plugin, 'Varnish', array($this, 'displayCustomFields'), $postType, 'side', 'high');
  }
  }
  }
 
  public function saveCustomFields($post_id, $post)
  {
  if (!isset($_POST['vc-custom-fields_wpnonce']) || !wp_verify_nonce($_POST['vc-custom-fields_wpnonce'], 'vc-custom-fields'))
  return;
  if (!current_user_can('edit_post', $post_id))
  return;
  if (!in_array($post->post_type, $this->postTypes))
  return;
  foreach ($this->customFields as $customField) {
  if (current_user_can($customField['capability'], $post_id)) {
  if (isset($_POST[$this->prefix . $customField['name']]) && trim($_POST[$this->prefix . $customField['name']]) != '') {
  update_post_meta($post_id, $this->prefix . $customField['name'], $_POST[$this->prefix . $customField['name']]);
  } else {
  delete_post_meta($post_id, $this->prefix . $customField['name']);
  }
  }
  }
  }
 
  public function displayCustomFields()
  {
  global $post;
  ?>
  <?php
  wp_nonce_field('vc-custom-fields', 'vc-custom-fields_wpnonce', false, true);
  foreach ($this->customFields as $customField) {
  // Check scope
  $scope = $customField['scope'];
  $output = false;
  foreach ($scope as $scopeItem) {
  switch ($scopeItem) {
  default: {
  if ($post->post_type == $scopeItem)
  $output = true;
  break;
  }
  }
  if ($output) break;
  }
  // Check capability
  if (!current_user_can($customField['capability'], $post->ID))
  $output = false;
  // Output if allowed
  if ($output) { ?>
  <?php
  switch ($customField['type']) {
  case "checkbox": {
  // Checkbox
  echo '<p><strong>' . $customField['title'] . '</strong></p>';
  echo '<label class="screen-reader-text" for="' . $this->prefix . $customField['name'] . '">' . $customField['title'] . '</label>';
  echo '<p><input type="checkbox" name="' . $this->prefix . $customField['name'] . '" id="' . $this->prefix . $customField['name'] . '" value="yes"';
  if (get_post_meta($post->ID, $this->prefix . $customField['name'], true ) == "yes")
  echo ' checked="checked"';
  echo '" style="width: auto;" /></p>';
  break;
  }
  default: {
  // Plain text field
  echo '<p><b>' . $customField['title'] . '</b></p>';
  $value = get_post_meta($post->ID, $this->prefix . $customField[ 'name' ], true);
  $default_ttl = get_option($this->prefix . 'ttl');
  echo '<p><input type="text" name="' . $this->prefix . $customField['name'] . '" id="' . $this->prefix . $customField['name'] . '" value="' . $value . '" /></p>';
  break;
  }
  }
  ?>
  <?php if ($customField['description']) echo '<p>' . sprintf($customField['description'], $default_ttl) . '</p>'; ?>
  <?php
  }
  } ?>
  <?php
  }
 
  public function check_if_purgeable()
  {
  return (!is_multisite() && current_user_can('activate_plugins')) || current_user_can('manage_network') || (is_multisite() && !current_user_can('manage_network') && (SUBDOMAIN_INSTALL || (!SUBDOMAIN_INSTALL && (BLOG_ID_CURRENT_SITE != $this->blogId))));
  }
 
  public function purge_message()
  {
  echo '<div id="message" class="updated fade"><p><strong>' . __('Varnish message:', $this->plugin) . '</strong><br />' . $this->noticeMessage . '</p></div>';
  }
 
  public function purge_message_no_ips()
  {
  echo '<div id="message" class="error fade"><p><strong>' . __('Please set the IPs for Varnish!', $this->plugin) . '</strong></p></div>';
  }
 
  public function pretty_permalinks_message()
  {
  echo '<div id="message" class="error"><p>' . __('Varnish Caching requires you to use custom permalinks. Please go to the <a href="options-permalink.php">Permalinks Options Page</a> to configure them.', $this->plugin) . '</p></div>';
  }
 
  public function purge_varnish_cache_all_adminbar($admin_bar)
  {
  $admin_bar->add_menu(array(
  'id' => 'purge-all-varnish-cache',
  'title' => __('Purge ALL Varnish Cache', $this->plugin),
  'href' => wp_nonce_url(add_query_arg($this->getParam, 1), $this->plugin),
  'meta' => array(
  'title' => __('Purge ALL Varnish Cache', $this->plugin),
  )
  ));
  }
 
  public function varnish_glance()
  {
  $url = wp_nonce_url(admin_url('?' . $this->getParam), $this->plugin);
  $button = '';
  $nopermission = '';
  if ($this->varnishIp == null) {
  $intro .= sprintf(__('Please setup Varnish IPs to be able to use <a href="%1$s">Varnish Caching</a>.', $this->plugin), 'http://wordpress.org/plugins/varnish-caching/');
  } else {
  $intro .= sprintf(__('<a href="%1$s">Varnish Caching</a> automatically purges your posts when published or updated. Sometimes you need a manual flush.', $this->plugin), 'http://wordpress.org/plugins/varnish-caching/');
  $button .= __('Press the button below to force it to purge your entire cache.', $this->plugin);
  $button .= '</p><p><span class="button"><a href="' . $url . '"><strong>';
  $button .= __('Purge ALL Varnish Cache', $this->plugin);
  $button .= '</strong></a></span>';
  $nopermission .= __('You do not have permission to purge the cache for the whole site. Please contact your adminstrator.', $this->plugin);
  }
  if ($this->check_if_purgeable()) {
  $text = $intro . ' ' . $button;
  } else {
  $text = $intro . ' ' . $nopermission;
  }
  echo '<p class="varnish-galce">' . $text . '</p>';
  }
 
  protected function getRegisterEvents() {
  $actions = array(
  'save_post',
  'deleted_post',
  'trashed_post',
  'edit_post',
  'delete_attachment',
  'switch_theme',
  );
  return apply_filters('vcaching_events', $actions);
  }
 
  public function purgeCache() {
  $purgeUrls = array_unique($this->purgeUrls);
 
  if (empty($purgeUrls)) {
  if (isset($_GET[$this->getParam]) && current_user_can('manage_options') && check_admin_referer($this->plugin)) {
  $this->purgeUrl(home_url() .'/?vc-regex');
  }
  } else {
  foreach($purgeUrls as $url) {
  $this->purgeUrl($url);
  }
  }
  add_action('admin_notices' , array($this, 'purge_message'));
  }
 
  protected function purgeUrl($url) {
  $p = parse_url($url);
 
  if (isset($p['query']) && ($p['query'] == 'vc-regex')) {
  $pregex = '.*';
  $purgemethod = 'regex';
  } else {
  $pregex = '';
  $purgemethod = 'default';
  }
 
  if (isset($p['path'])) {
  $path = $p['path'];
  } else {
  $path = '';
  }
 
  $schema = apply_filters('vcaching_schema', 'http://');
 
  foreach ($this->ipsToHosts as $key => $ipToHost) {
  $purgeme = $schema . $ipToHost['ip'] . $path . $pregex;
  $headers = array('host' => $ipToHost['host'], 'X-VC-Purge-Method' => $purgemethod, 'X-VC-Purge-Host' => $ipToHost['host']);
  if (!is_null($this->purgeKey)) {
  $headers['X-VC-Purge-Key'] = $this->purgeKey;
  }
  $response = wp_remote_request($purgeme, array('method' => 'PURGE', 'headers' => $headers));
  if ($response instanceof WP_Error) {
  foreach ($response->errors as $error => $errors) {
  $this->noticeMessage .= '<br />Error ' . $error . '<br />';
  foreach ($errors as $error => $description) {
  $this->noticeMessage .= ' - ' . $description . '<br />';
  }
  }
  } else {
  if ($this->truncateNotice && $key <= 2 || $this->truncateNotice == false) {
  $this->noticeMessage .= '' . __('Trying to purge URL :', $this->plugin) . $purgeme;
  preg_match("/<title>(.*)<\/title>/i", $response['body'], $matches);
  $this->noticeMessage .= ' => <br /> ' . isset($matches[1]) ? " => " . $matches[1] : $response['body'];
  $this->noticeMessage .= '<br />';
  if ($this->debug) {
  $this->noticeMessage .= $response['body'] . "<br />";
  }
  }
  }
  }
  if ($this->truncateNotice) {
  $this->noticeMessage .= '<br />' . __('Truncate message activated. Showing only first 3 messages.', $this->plugin);
  }
 
  do_action('after_purge_url', $url, $purgeme);
  }
 
  public function purge_post($postId)
  {
  // If this is a valid post we want to purge the post, the home page and any associated tags & cats
  // If not, purge everything on the site.
 
  $validPostStatus = array('publish', 'trash');
  $thisPostStatus = get_post_status($postId);
 
  // If this is a revision, stop.
  if(get_permalink($postId) !== true && !in_array($thisPostStatus, $validPostStatus)) {
  return;
  } else {
  // array to collect all our URLs
  $listofurls = array();
 
  // Category purge based on Donnacha's work in WP Super Cache
  $categories = get_the_category($postId);
  if ($categories) {
  foreach ($categories as $cat) {
  array_push($listofurls, get_category_link($cat->term_id));
  }
  }
  // Tag purge based on Donnacha's work in WP Super Cache
  $tags = get_the_tags($postId);
  if ($tags) {
  foreach ($tags as $tag) {
  array_push($listofurls, get_tag_link($tag->term_id));
  }
  }
 
  // Author URL
  array_push($listofurls,
  get_author_posts_url(get_post_field('post_author', $postId)),
  get_author_feed_link(get_post_field('post_author', $postId))
  );
 
  // Archives and their feeds
  $archiveurls = array();
  if ( get_post_type_archive_link(get_post_type($postId)) == true) {
  array_push($listofurls,
  get_post_type_archive_link( get_post_type($postId)),
  get_post_type_archive_feed_link( get_post_type($postId))
  );
  }
 
  // Post URL
  array_push($listofurls, get_permalink($postId));
 
  // Feeds
  array_push($listofurls,
  get_bloginfo_rss('rdf_url') ,
  get_bloginfo_rss('rss_url') ,
  get_bloginfo_rss('rss2_url'),
  get_bloginfo_rss('atom_url'),
  get_bloginfo_rss('comments_rss2_url'),
  get_post_comments_feed_link($postId)
  );
 
  // Home Page and (if used) posts page
  array_push($listofurls, home_url('/'));
  if ( get_option('show_on_front') == 'page') {
  array_push($listofurls, get_permalink(get_option('page_for_posts')));
  }
 
  // Now flush all the URLs we've collected
  foreach ($listofurls as $url) {
  array_push($this->purgeUrls, $url) ;
  }
  }
  // Filter to add or remove urls to the array of purged urls
  // @param array $purgeUrls the urls (paths) to be purged
  // @param int $postId the id of the new/edited post
  $this->purgeUrls = apply_filters('vcaching_purge_urls', $this->purgeUrls, $postId);
  $this->purgeCache();
  }
 
  public function send_headers()
  {
  $enable = get_option($this->prefix . 'enable');
  if ($enable) {
  Header('X-VC-Enabled: true', true);
  if (is_user_logged_in()) {
  Header('X-VC-Cacheable: NO:User is logged in', true);
  $ttl = 0;
  } else {
  $ttl = get_option($this->prefix . 'ttl');
  }
  Header('X-VC-TTL: ' . $ttl, true);
  if ($debug = get_option($this->prefix . 'debug')) {
  Header('X-VC-Debug: true', true);
  }
  } else {
  Header('X-VC-Enabled: false', true);
  }
  }
 
  public function wp_login()
  {
  $cookie = get_option($this->prefix . 'cookie');
  setcookie($cookie, 1, time()+3600*24*100, COOKIEPATH, COOKIE_DOMAIN, false, true);
  }
 
  public function wp_logout()
  {
  $cookie = get_option($this->prefix . 'cookie');
  setcookie($cookie, null, time()-3600*24*100, COOKIEPATH, COOKIE_DOMAIN, false, true);
  }
 
  public function admin_menu()
  {
  add_action('admin_menu', array($this, 'add_menu_item'));
  add_action('admin_init', array($this, 'options_page_fields'));
  add_action('admin_init', array($this, 'console_page_fields'));
  add_action('admin_init', array($this, 'conf_page_fields'));
  }
 
  public function add_menu_item()
  {
  if ($this->check_if_purgeable()) {
  add_menu_page(__('Varnish Caching', $this->plugin), __('Varnish Caching', $this->plugin), 'manage_options', $this->plugin . '-plugin', array($this, 'settings_page'), plugins_url() . '/' . $this->plugin . '/icon.png', 99);
  }
  }
 
  public function settings_page()
  {
  ?>
  <div class="wrap">
  <h1><?=__('Varnish Caching', $this->plugin)?></h1>
 
  <h2 class="nav-tab-wrapper">
  <a class="nav-tab <?php if(!isset($_GET['tab']) || $_GET['tab'] == 'options'): ?>nav-tab-active<?php endif; ?>" href="<?php echo admin_url() ?>index.php?page=<?=$this->plugin?>-plugin&amp;tab=options"><?=__('Settings', $this->plugin)?></a>
  <?php if ($this->check_if_purgeable()): ?>
  <a class="nav-tab <?php if($_GET['tab'] == 'console'): ?>nav-tab-active<?php endif; ?>" href="<?php echo admin_url() ?>index.php?page=<?=$this->plugin?>-plugin&amp;tab=console"><?=__('Console', $this->plugin)?></a>
  <?php endif; ?>
  <a class="nav-tab <?php if($_GET['tab'] == 'stats'): ?>nav-tab-active<?php endif; ?>" href="<?php echo admin_url() ?>index.php?page=<?=$this->plugin?>-plugin&amp;tab=stats"><?=__('Statistics', $this->plugin)?></a>
  <a class="nav-tab <?php if($_GET['tab'] == 'conf'): ?>nav-tab-active<?php endif; ?>" href="<?php echo admin_url() ?>index.php?page=<?=$this->plugin?>-plugin&amp;tab=conf"><?=__('Varnish VCLs', $this->plugin)?></a>
  </h2>
 
  <?php if(!isset($_GET['tab']) || $_GET['tab'] == 'options'): ?>
  <form method="post" action="options.php">
  <?php
  settings_fields($this->prefix . 'options');
  do_settings_sections($this->prefix . 'options');
  submit_button();
  ?>
  </form>
  <script type="text/javascript">
  function generateHash(length, bits, id) {
  bits = bits || 36;
  var outStr = "", newStr;
  while (outStr.length < length)
  {
  newStr = Math.random().toString(bits).slice(2);
  outStr += newStr.slice(0, Math.min(newStr.length, (length - outStr.length)));
  }
  jQuery('#' + id).val(outStr);
  }
  </script>
  <?php elseif($_GET['tab'] == 'console'): ?>
  <form method="post" action="index.php?page=<?=$this->plugin?>-plugin&amp;tab=console">
  <?php
  settings_fields($this->prefix . 'console');
  do_settings_sections($this->prefix . 'console');
  submit_button(__('Purge', $this->plugin));
  ?>
  </form>
  <?php elseif($_GET['tab'] == 'stats'): ?>
  <h2><?= __('Statistics', $this->plugin) ?></h2>
 
  <div class="wrap">
  <?php if ($_GET['info'] == 1 || trim($this->statsJsons) == ""): ?>
  <div class="fade">
  <h4><?=__('Setup information', $this->plugin)?></h4>
  <?= __('<strong>Short story</strong><br />You must generate by cronjob the JSON stats file. The generated files must be copied on the backend servers in the wordpress root folder.', $this->plugin) ?>
  <br /><br />
  <?=sprintf(__('<strong>Long story</strong><br />On every Varnish Cache server setup a cronjob that generates the JSON stats file :<br /> %1$s /path/to/be/set/filename.json # every 3 minutes.', $this->plugin), '*/3 * * * * root /usr/bin/varnishstat -1j >')?>
  <br />
  <?= __('The generated files must be copied on the backend servers in the wordpress root folder.', $this->plugin) ?>
  <br />
  <?=__("Use a different filename for each Varnish Cache server. After this is done, fill in the relative path to the files in Statistics JSONs on the Settings tab.", $this->plugin)?>
  <br /><br />
  <?= __('Example 1 <br />If you have a single server, both Varnish Cache and the backend on it, use the folowing cronjob:', $this->plugin) ?>
  <br />
  <?=sprintf(__('%1$s /path/to/the/wordpress/root/varnishstat.json # every 3 minutes.', $this->plugin), '*/3 * * * * root /usr/bin/varnishstat -1j >')?>
  <br />
  <?=__("Then fill in the relative path to the files in Statistics JSONs on the Settings tab :", $this->plugin)?>
  <br />
  <input type="text" size="100" value="<?=__("/varnishstat.json", $this->plugin)?>" />
 
  <br /><br />
  <?=__("Example 2 <br />You have 2 Varnish Cache Servers, and 3 backend servers. Setup the cronjob :", $this->plugin)?>
  <br />
  <?=sprintf(__('VC Server 1 : %1$s # every 3 minutes.', $this->plugin), '*/3 * * * * root /usr/bin/varnishstat -1j > /root/varnishstat/server1_3389398cd359cfa443f85ca040da069a.json')?>
  <br />
  <?=sprintf(__('VC Server 2 : %1$s # every 3 minutes.', $this->plugin), '*/3 * * * * root /usr/bin/varnishstat -1j > /root/varnishstat/server2_3389398cd359cfa443f85ca040da069a.json')?>
  <br />
  <?=__("Copy the files on the backend servers in /path/to/wordpress/root/varnishstat/ folder. Then fill in the relative path to the files in Statistics JSONs on the Settings tab :", $this->plugin)?>
  <br />
 
  <input type="text" size="100" value="<?=__("/varnishstat/server1_3389398cd359cfa443f85ca040da069a.json,/varnishstat/server2_3389398cd359cfa443f85ca040da069a.json", $this->plugin)?>" />
  </div>
  <?php endif; ?>
 
  <?php if(trim($this->statsJsons)): ?>
  <h2 class="nav-tab-wrapper">
  <?php foreach ($this->ipsToHosts as $server => $ipToHost): ?>
  <a class="server nav-tab <?php if($server == 0) echo "nav-tab-active"; ?>" href="#" server="<?=$server?>"><?= sprintf(__('Server %1$s', $this->plugin), $ipToHost['ip'])?></a>
  <?php endforeach; ?>
  </h2>
 
  <?php foreach ($this->ipsToHosts as $server => $ipToHost): ?>
  <div id="server_<?=$server?>" class="servers" style="display:<?php if($server == 0) {echo 'block';} else {echo 'none';} ?>">
  <?= sprintf(__('Fetching stats for server %1$s', $this->plugin), $ipToHost['ip']) ?>
  </div>
  <script type="text/javascript">
  jQuery.getJSON("<?=$ipToHost['statsJson']?>", function(data) {
  var server = '#server_<?=$server?>';
  jQuery(server).html('');
  jQuery(server).append('<p><?= __('Stats generated on', $this->plugin) ?> ' + data.timestamp + '</p>');
  jQuery(server).append('<table class="wp-list-table widefat fixed striped server_<?=$server?>"><thead><tr><td class="manage-column"><strong><?= __('Description', $this->plugin) ?></strong></td><td class="manage-column"><strong><?= __('Value', $this->plugin) ?></strong></td><td class="manage-column"><strong><?= __('Key', $this->plugin) ?></strong></td></tr></thead><tbody id="varnishstats_<?=$server?>"></tbody></table>');
  delete data.timestamp;
  jQuery.each(data, function(key, val) {
  jQuery('#varnishstats_<?=$server?>').append('<tr><td>'+val.description+'</td><td>'+val.value+'</td><td>'+key+'</td></tr>');
  });
  });
  </script>
  <?php endforeach; ?>
  <script type="text/javascript">
  jQuery('.nav-tab-wrapper > a.server').click(function(e){
  e.preventDefault();
  jQuery('.nav-tab-wrapper > a.server').removeClass('nav-tab-active');
  jQuery(this).addClass('nav-tab-active');
  jQuery(".servers").hide();
  jQuery("#server_" + jQuery(this).attr('server')).show();
  });
  </script>
  <?php endif; ?>
  </div>
  <?php elseif($_GET['tab'] == 'conf'): ?>
  <form method="post" action="options.php">
  <?php
  settings_fields($this->prefix . 'conf');
  do_settings_sections($this->prefix . 'conf');
  submit_button();
  ?>
  </form>
  <?php if (class_exists('ZipArchive')): ?>
  <form method="post" action="index.php?page=<?=$this->plugin?>-plugin&amp;tab=conf">
  <?php
  settings_fields($this->prefix . 'download');
  do_settings_sections($this->prefix . 'download');
  submit_button(__('Download'));
  ?>
  </form>
  <?php else: ?>
  <?php
  do_settings_sections($this->prefix . 'download_error');
  echo sprintf(__('You server\'s PHP configuration is missing the ZIP extension (ZipArchive class is used by VCaching). Please enable the ZIP extension. For more information click <a href="%1$s" target="_blank">here</a>.', $this->plugin), 'http://www.php.net/manual/en/book.zip.php');
  echo "<br />";
  echo __('If you cannot enable the ZIP extension, please use the provided Varnish Cache configuration files located in /wp-content/plugins/vcaching/varnish-conf folder', $this->plugin);
  ?>
  <?php endif; ?>
  <?php endif; ?>
  </div>
  <?php
  }
 
  public function options_page_fields()
  {
  add_settings_section($this->prefix . 'options', __('Settings', $this->plugin), null, $this->prefix . 'options');
 
  add_settings_field($this->prefix . "enable", __("Enable" , $this->plugin), array($this, $this->prefix . "enable"), $this->prefix . 'options', $this->prefix . 'options');
  add_settings_field($this->prefix . "homepage_ttl", __("Homepage cache TTL", $this->plugin), array($this, $this->prefix . "homepage_ttl"), $this->prefix . 'options', $this->prefix . 'options');
  add_settings_field($this->prefix . "ttl", __("Cache TTL", $this->plugin), array($this, $this->prefix . "ttl"), $this->prefix . 'options', $this->prefix . 'options');
  add_settings_field($this->prefix . "ips", __("IPs", $this->plugin), array($this, $this->prefix . "ips"), $this->prefix . 'options', $this->prefix . 'options');
  add_settings_field($this->prefix . "dynamic_host", __("Dynamic host", $this->plugin), array($this, $this->prefix . "dynamic_host"), $this->prefix . 'options', $this->prefix . 'options');
  if (!get_option($this->prefix . 'dynamic_host')) {
  add_settings_field($this->prefix . "hosts", __("Hosts", $this->plugin), array($this, $this->prefix . "hosts"), $this->prefix . 'options', $this->prefix . 'options');
  }
  add_settings_field($this->prefix . "override", __("Override default TTL", $this->plugin), array($this, $this->prefix . "override"), $this->prefix . 'options', $this->prefix . 'options');
  add_settings_field($this->prefix . "purge_key", __("Purge key", $this->plugin), array($this, $this->prefix . "purge_key"), $this->prefix . 'options', $this->prefix . 'options');
  add_settings_field($this->prefix . "cookie", __("Logged in cookie", $this->plugin), array($this, $this->prefix . "cookie"), $this->prefix . 'options', $this->prefix . 'options');
  add_settings_field($this->prefix . "stats_json_file", __("Statistics JSONs", $this->plugin), array($this, $this->prefix . "stats_json_file"), $this->prefix . 'options', $this->prefix . 'options');
  add_settings_field($this->prefix . "truncate_notice", __("Truncate notice message", $this->plugin), array($this, $this->prefix . "truncate_notice"), $this->prefix . 'options', $this->prefix . 'options');
  add_settings_field($this->prefix . "debug", __("Enable debug", $this->plugin), array($this, $this->prefix . "debug"), $this->prefix . 'options', $this->prefix . 'options');
 
  if($_POST['option_page'] == $this->prefix . 'options') {
  register_setting($this->prefix . 'options', $this->prefix . "enable");
  register_setting($this->prefix . 'options', $this->prefix . "ttl");
  register_setting($this->prefix . 'options', $this->prefix . "homepage_ttl");
  register_setting($this->prefix . 'options', $this->prefix . "ips");
  register_setting($this->prefix . 'options', $this->prefix . "dynamic_host");
  register_setting($this->prefix . 'options', $this->prefix . "hosts");
  register_setting($this->prefix . 'options', $this->prefix . "override");
  register_setting($this->prefix . 'options', $this->prefix . "purge_key");
  register_setting($this->prefix . 'options', $this->prefix . "cookie");
  register_setting($this->prefix . 'options', $this->prefix . "stats_json_file");
  register_setting($this->prefix . 'options', $this->prefix . "truncate_notice");
  register_setting($this->prefix . 'options', $this->prefix . "debug");
  }
  }
 
  public function varnish_caching_enable()
  {
  ?>
  <input type="checkbox" name="varnish_caching_enable" value="1" <?php checked(1, get_option($this->prefix . 'enable'), true); ?> />
  <p class="description"><?=__('Enable Varnish Caching', $this->plugin)?></p>
  <?php
  }
 
  public function varnish_caching_homepage_ttl()
  {
  ?>
  <input type="text" name="varnish_caching_homepage_ttl" id="varnish_caching_homepage_ttl" value="<?php echo get_option($this->prefix . 'homepage_ttl'); ?>" />
  <p class="description"><?=__('Time to live in seconds in Varnish cache for homepage', $this->plugin)?></p>
  <?php
  }
 
  public function varnish_caching_ttl()
  {
  ?>
  <input type="text" name="varnish_caching_ttl" id="varnish_caching_ttl" value="<?php echo get_option($this->prefix . 'ttl'); ?>" />
  <p class="description"><?=__('Time to live in seconds in Varnish cache', $this->plugin)?></p>
  <?php
  }
 
  public function varnish_caching_ips()
  {
  ?>
  <input type="text" name="varnish_caching_ips" id="varnish_caching_ips" size="100" value="<?php echo get_option($this->prefix . 'ips'); ?>" />
  <p class="description"><?=__('Comma separated ip/ip:port. Example : 192.168.0.2,192.168.0.3:8080', $this->plugin)?></p>
  <?php
  }
 
  public function varnish_caching_dynamic_host()
  {
  ?>
  <input type="checkbox" name="varnish_caching_dynamic_host" value="1" <?php checked(1, get_option($this->prefix . 'dynamic_host'), true); ?> />
  <p class="description">
  <?=__('Uses the $_SERVER[\'HTTP_HOST\'] as hash for Varnish. This means the purge cache action will work on the domain you\'re on.<br />Use this option if you use only one domain.', $this->plugin)?>
  </p>
  <?php
  }
 
  public function varnish_caching_hosts()
  {
  ?>
  <input type="text" name="varnish_caching_hosts" id="varnish_caching_hosts" size="100" value="<?php echo get_option($this->prefix . 'hosts'); ?>" />
  <p class="description">
  <?=__('Comma separated hostnames. Varnish uses the hostname to create the cache hash. For each IP, you must set a hostname.<br />Use this option if you use multiple domains.', $this->plugin)?>
  </p>
  <?php
  }
 
  public function varnish_caching_override()
  {
  ?>
  <input type="checkbox" name="varnish_caching_override" value="1" <?php checked(1, get_option($this->prefix . 'override'), true); ?> />
  <p class="description"><?=__('Override default TTL on each post/page.', $this->plugin)?></p>
  <?php
  }
 
  public function varnish_caching_purge_key()
  {
  ?>
  <input type="text" name="varnish_caching_purge_key" id="varnish_caching_purge_key" size="100" value="<?php echo get_option($this->prefix . 'purge_key'); ?>" />
  <span onclick="generateHash(64, 0, 'varnish_caching_purge_key'); return false;" class="dashicons dashicons-image-rotate" title="<?=__('Generate')?>"></span>
  <p class="description">
  <?=__('Key used to purge Varnish cache. It is sent to Varnish as X-VC-Purge-Key header. Use a SHA-256 hash.<br />If you can\'t use ACL\'s, use this option. You can set the `purge key` in lib/purge.vcl.<br />Search the default value ff93c3cb929cee86901c7eefc8088e9511c005492c6502a930360c02221cf8f4 to find where to replace it.', $this->plugin)?>
  </p>
  <?php
  }
 
  public function varnish_caching_cookie()
  {
  ?>
  <input type="text" name="varnish_caching_cookie" id="varnish_caching_cookie" size="10" maxlength="10" value="<?php echo get_option($this->prefix . 'cookie'); ?>" />
  <span onclick="generateHash(10, 0, 'varnish_caching_cookie'); return false;" class="dashicons dashicons-image-rotate" title="<?=__('Generate')?>"></span>
  <p class="description">
  <?=__('This module sets a special cookie to tell Varnish that the user is logged in. This should be a random 10 chars string [0-9a-z]. You can set the `logged in cookie` in default.vcl.<br />Search the default value <i>c005492c65</i> to find where to replace it.', $this->plugin)?>
  </p>
  <?php
  }
 
  public function varnish_caching_stats_json_file()
  {
  ?>
  <input type="text" name="varnish_caching_stats_json_file" id="varnish_caching_stats_json_file" size="100" value="<?php echo get_option($this->prefix . 'stats_json_file'); ?>" />
  <p class="description">
  <?=sprintf(__('Comma separated relative URLs. One for each IP. <a href="%1$s/wp-admin/index.php?page=vcaching-plugin&tab=stats&info=1">Click here</a> for more info on how to set this up.', $this->plugin), home_url())?>
  </p>
  <?php
  }
 
  public function varnish_caching_truncate_notice()
  {
  ?>
  <input type="checkbox" name="varnish_caching_truncate_notice" value="1" <?php checked(1, get_option($this->prefix . 'truncate_notice'), true); ?> />
  <p class="description">
  <?=__('When using multiple Varnish Cache servers, VCaching shows too many `Trying to purge URL` messages. Check this option to truncate that message.', $this->plugin)?>
  </p>
  <?php
  }
 
  public function varnish_caching_debug()
  {
  ?>
  <input type="checkbox" name="varnish_caching_debug" value="1" <?php checked(1, get_option($this->prefix . 'debug'), true); ?> />
  <p class="description">
  <?=__('Send all debugging headers to the client. Also shows complete response from Varnish on purge all.', $this->plugin)?>
  </p>
  <?php
  }
 
  public function console_page_fields()
  {
  add_settings_section('console', __("Console", $this->plugin), null, $this->prefix . 'console');
 
  add_settings_field($this->prefix . "purge_url", __("URL", $this->plugin), array($this, $this->prefix . "purge_url"), $this->prefix . 'console', "console");
  }
 
  public function varnish_caching_purge_url()
  {
  ?>
  <input type="text" name="varnish_caching_purge_url" size="100" id="varnish_caching_purge_url" value="" />
  <p class="description"><?=__('Relative URL to purge. Example : /wp-content/uploads/.*', $this->plugin)?></p>
  <?php
  }
 
  public function conf_page_fields()
  {
  add_settings_section('conf', __("Varnish configuration", $this->plugin), null, $this->prefix . 'conf');
 
  add_settings_field($this->prefix . "varnish_backends", __("Backends", $this->plugin), array($this, $this->prefix . "varnish_backends"), $this->prefix . 'conf', "conf");
  add_settings_field($this->prefix . "varnish_acls", __("ACLs", $this->plugin), array($this, $this->prefix . "varnish_acls"), $this->prefix . 'conf', "conf");
 
  if($_POST['option_page'] == $this->prefix . 'conf') {
  register_setting($this->prefix . 'conf', $this->prefix . "varnish_backends");
  register_setting($this->prefix . 'conf', $this->prefix . "varnish_acls");
  }
 
  add_settings_section('download', __("Get configuration files", $this->plugin), null, $this->prefix . 'download');
  if (!class_exists('ZipArchive')) {
  add_settings_section('download_error', __("You cannot download the configuration files", $this->plugin), null, $this->prefix . 'download_error');
  }
 
  add_settings_field($this->prefix . "varnish_version", __("Version", $this->plugin), array($this, $this->prefix . "varnish_version"), $this->prefix . 'download', "download");
 
  if($_POST['option_page'] == $this->prefix . 'download') {
  $version = in_array($_POST['varnish_caching_varnish_version'], array(3,4)) ? $_POST['varnish_caching_varnish_version'] : 3;
  $tmpfile = tempnam("tmp", "zip");
  $zip = new ZipArchive();
  $zip->open($tmpfile, ZipArchive::OVERWRITE);
  $files = array(
  'default.vcl' => true,
  'LICENSE' => false,
  'README.rst' => false,
  'conf/acl.vcl' => true,
  'conf/backend.vcl' => true,
  'lib/bigfiles.vcl' => false,
  'lib/bigfiles_pipe.vcl' => false,
  'lib/cloudflare.vcl' => false,
  'lib/mobile_cache.vcl' => false,
  'lib/mobile_pass.vcl' => false,
  'lib/purge.vcl' => true,
  'lib/static.vcl' => false,
  'lib/xforward.vcl' => false,
  );
  foreach ($files as $file => $parse) {
  $filepath = __DIR__ . '/varnish-conf/v' . $version . '/' . $file;
  if ($parse) {
  $content = $this->_parse_conf_file($version, $file, file_get_contents($filepath));
  } else {
  $content = file_get_contents($filepath);
  }
  $zip->addFromString($file, $content);
  }
  $zip->close();
  header('Content-Type: application/zip');
  header('Content-Length: ' . filesize($tmpfile));
  header('Content-Disposition: attachment; filename="varnish_v' . $version . '_conf.zip"');
  readfile($tmpfile);
  unlink($tmpfile);
  exit();
  }
  }
 
  public function varnish_caching_varnish_version()
  {
  ?>
  <select name="varnish_caching_varnish_version" id="varnish_caching_varnish_version">
  <option value="3">3</option>
  <option value="4">4</option>
  </select>
  <p class="description"><?=__('Varnish Cache version', $this->plugin)?></p>
  <?php
  }
 
  public function varnish_caching_varnish_backends()
  {
  ?>
  <input type="text" name="varnish_caching_varnish_backends" id="varnish_caching_varnish_backends" size="100" value="<?php echo get_option($this->prefix . 'varnish_backends'); ?>" />
  <p class="description"><?=__('Comma separated ip/ip:port. Example : 192.168.0.2,192.168.0.3:8080', $this->plugin)?></p>
  <?php
  }
 
  public function varnish_caching_varnish_acls()
  {
  ?>
  <input type="text" name="varnish_caching_varnish_acls" id="varnish_caching_varnish_acls" size="100" value="<?php echo get_option($this->prefix . 'varnish_acls'); ?>" />
  <p class="description"><?=__('Comma separated ip/ip range. Example : 192.168.0.2,192.168.1.1/24', $this->plugin)?></p>
  <?php
  }
 
  private function _parse_conf_file($version, $file, $content)
  {
  if ($file == 'default.vcl') {
  $logged_in_cookie = get_option($this->prefix . 'cookie');
  $content = str_replace('c005492c65', $logged_in_cookie, $content);
  } else if ($file == 'conf/backend.vcl') {
  if ($version == 3) {
  $content = "";
  } else if ($version == 4) {
  $content = "import directors;\n\n";
  }
  $backend = array();
  $ips = get_option($this->prefix . 'varnish_backends');
  $ips = explode(',', $ips);
  $id = 1;
  foreach ($ips as $ip) {
  if (strstr($ip, ":")) {
  $_ip = explode(':', $ip);
  $ip = $_ip[0];
  $port = $_ip[1];
  } else {
  $port = 80;
  }
  $content .= "backend backend" . $id . " {\n";
  $content .= "\t.host = \"" . $ip . "\";\n";
  $content .= "\t.port = \"" . $port . "\";\n";
  $content .= "}\n";
  $backend[3] .= "\t{\n";
  $backend[3] .= "\t\t.backend = backend" . $id . ";\n";
  $backend[3] .= "\t}\n";
  $backend[4] .= "\tbackends.add_backend(backend" . $id . ");\n";
  $id++;
  }
  if ($version == 3) {
  $content .= "\ndirector backends round-robin {\n";
  $content .= $backend[3];
  $content .= "}\n";
  $content .= "\nsub vcl_recv {\n";
  $content .= "\tset req.backend = backends;\n";
  $content .= "}\n";
  } elseif ($version == 4) {
  $content .= "\nsub vcl_init {\n";
  $content .= "\tnew backends = directors.round_robin();\n";
  $content .= $backend[4];
  $content .= "}\n";
  $content .= "\nsub vcl_recv {\n";
  $content .= "\tset req.backend_hint = backends.backend();\n";
  $content .= "}\n";
  }
  } else if ($file == 'conf/acl.vcl') {
  $acls = get_option($this->prefix . 'varnish_acls');
  $acls = explode(',', $acls);
  $content = "acl cloudflare {\n";
  $content .= "\t# set this ip to your Railgun IP (if applicable)\n";
  $content .= "\t# \"1.2.3.4\";\n";
  $content .= "}\n";
  $content .= "\nacl purge {\n";
  $content .= "\t\"localhost\";\n";
  $content .= "\t\"127.0.0.1\";\n";
  foreach ($acls as $acl) {
  $content .= "\t\"" . $acl . "\";\n";
  }
  $content .= "}\n";
  } else if ($file == 'lib/purge.vcl') {
  $purge_key = get_option($this->prefix . 'purge_key');
  $content = str_replace('ff93c3cb929cee86901c7eefc8088e9511c005492c6502a930360c02221cf8f4', $purge_key, $content);
  }
  return $content;
  }
  }
 
  $vcaching = new VCaching();
 
  // WP-CLI
  if ( defined('WP_CLI') && WP_CLI ) {
  include('wp-cli.php');
  }
 
file:a/wp-cli.php -> file:b/wp-cli.php
<?php <?php
   
if (!defined('ABSPATH')) { if (!defined('ABSPATH')) {
die(); die();
} }
   
if (!defined('WP_CLI')) return; if (!defined('WP_CLI')) return;
   
/** /**
* Purges Varnish Cache * Purges Varnish Cache
*/ */
class WP_CLI_VarnishCaching_Purge_Command extends WP_CLI_Command { class WP_CLI_VCaching_Purge_Command extends WP_CLI_Command {
   
public function __construct() { public function __construct() {
$this->varnish_caching = new VarnishCaching(); $this->vcaching = new VCaching();
} }
   
/** /**
* Forces a Varnish Purge * Forces a Varnish Purge
* *
* ## EXAMPLES * ## EXAMPLES
* *
* wp varnish purge * wp vcaching purge
* *
*/ */
public function purge() { public function purge() {
wp_create_nonce('varnish-http-purge-cli'); wp_create_nonce('vcaching-purge-cli');
$this->varnish_caching->purgeUrl(home_url() .'/?vc-regex'); $this->vcaching->purgeUrl(home_url() .'/?vc-regex');
WP_CLI::success('The Varnish cache was purged.'); WP_CLI::success('ALL Varnish cache was purged.');
} }
   
} }
   
WP_CLI::add_command('varnish', 'WP_CLI_VarnishCaching_Purge_Command'); WP_CLI::add_command('vcaching', 'WP_CLI_VCaching_Purge_Command');
   
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