hardcoded on/off VCL Generator, filters to readme
[varnish-caching-wordpress-plugin.git] / vcaching.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
<?php
/*
Plugin Name: Varnish Caching
Plugin URI: http://wordpress.org/extend/plugins/vcaching/
Description: WordPress Varnish Cache integration.
Version: 1.5.3
Author: Razvan Stanga
Author URI: http://git.razvi.ro/
License: http://www.apache.org/licenses/LICENSE-2.0
Text Domain: vcaching
Network: true
 
Copyright 2016: 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 $truncateCount = 0;
    protected $debug = 0;
    protected $vclGeneratorTab = true;
 
    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);
    }
 
    public function init()
    {
        load_plugin_textdomain($this->plugin, false, plugin_basename( dirname( __FILE__ ) ) . '/languages' );
 
        $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->setup_ips_to_hosts();
        $this->purgeKey = ($purgeKey = trim(get_option($this->prefix . 'purge_key'))) ? $purgeKey : null;
        $this->admin_menu();
 
        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->get_register_events() as $event) {
            add_action($event, array($this, 'purge_post'), 10, 2);
        }
 
        // purge all cache from admin bar
        if ($this->check_if_purgeable()) {
            add_action('admin_bar_menu', array($this, 'purge_varnish_cache_all_adminbar'), 100);
            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->purge_cache();
                }
            }
        }
 
        // purge post/page cache from post/page actions
        if ($this->check_if_purgeable()) {
            if(!session_id()) {
                session_start();
            }
            add_filter('post_row_actions', array(
                &$this,
                'post_row_actions'
            ), 0, 2);
            add_filter('page_row_actions', array(
                &$this,
                'page_row_actions'
            ), 0, 2);
            if (isset($_GET['action']) && isset($_GET['post_id']) && ($_GET['action'] == 'purge_post' || $_GET['action'] == 'purge_page') && check_admin_referer($this->plugin)) {
                $this->purge_post($_GET['post_id']);
                $_SESSION['vcaching_note'] = $this->noticeMessage;
                $referer = str_replace('purge_varnish_cache=1', '', wp_get_referer());
                wp_redirect($referer . (strpos($referer, '?') ? '&' : '?') . 'vcaching_note=' . $_GET['action']);
            }
            if (isset($_GET['vcaching_note']) && ($_GET['vcaching_note'] == 'purge_post' || $_GET['vcaching_note'] == 'purge_page')) {
                add_action('admin_notices' , array($this, 'purge_post_page'));
            }
        }
 
        if ($this->override = get_option($this->prefix . 'override')) {
            add_action('admin_menu', array($this, 'create_custom_fields'));
            add_action('save_post', array($this, 'save_custom_fields' ), 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 ($this->check_if_purgeable() && isset($_POST['varnish_caching_purge_url'])) {
            $this->purge_url(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 setup_ips_to_hosts()
    {
        $this->varnishIp = get_option($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);
        $varnishIp = apply_filters('vcaching_varnish_ips', $varnishIp);
        $varnishHost = explode(',', $this->varnishHost);
        $varnishHost = apply_filters('vcaching_varnish_hosts', $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 create_custom_fields()
    {
        if (function_exists('add_meta_box')) {
            foreach ($this->postTypes as $postType) {
                add_meta_box($this->plugin, __('Varnish Caching', $this->plugin), array($this, 'display_custom_fields'), $postType, 'side', 'high');
            }
        }
    }
 
    public function save_custom_fields($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 display_custom_fields()
    {
        global $post;
        wp_nonce_field('vc-custom-fields', 'vc-custom-fields_wpnonce', false, true);
        foreach ($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) {
                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><strong>' . $customField['title'] . '</strong></p>';
                        $value = get_post_meta($post->ID, $this->prefix . $customField[ 'name' ], true);
                        echo '<p><input type="text" name="' . $this->prefix . $customField['name'] . '" id="' . $this->prefix . $customField['name'] . '" value="' . $value . '" /></p>';
                        break;
                    }
                }
            } else {
                echo '<p><strong>' . $customField['title'] . '</strong></p>';
                $value = get_post_meta($post->ID, $this->prefix . $customField[ 'name' ], true);
                echo '<p><input type="text" name="' . $this->prefix . $customField['name'] . '" id="' . $this->prefix . $customField['name'] . '" value="' . $value . '" disabled /></p>';
            }
            $default_ttl = get_option($this->prefix . 'ttl');
            if ($customField['description']) echo '<p>' . sprintf($customField['description'], $default_ttl) . '</p>';
        }
    }
 
    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 Caching', $this->plugin) . '</strong><br /><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 purge_post_page()
    {
        if (isset($_SESSION['vcaching_note'])) {
            echo '<div id="message" class="updated fade"><p><strong>' . __('Varnish Caching', $this->plugin) . '</strong><br /><br />' . $_SESSION['vcaching_note'] . '</p></div>';
            unset ($_SESSION['vcaching_note']);
        }
    }
 
    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-glance">' . $text . '</p>';
    }
 
    protected function get_register_events()
    {
        $actions = array(
            'save_post',
            'deleted_post',
            'trashed_post',
            'edit_post',
            'delete_attachment',
            'switch_theme',
        );
        return apply_filters('vcaching_events', $actions);
    }
 
    public function purge_cache()
    {
        $purgeUrls = array_unique($this->purgeUrls);
 
        if (empty($purgeUrls)) {
            if (isset($_GET[$this->getParam]) && $this->check_if_purgeable() && check_admin_referer($this->plugin)) {
                $this->purge_url(home_url() .'/?vc-regex');
            }
        } else {
            foreach($purgeUrls as $url) {
                $this->purge_url($url);
            }
        }
        if ($this->truncateNotice) {
            $this->noticeMessage .= '<br />' . __('Truncate message activated. Showing only first 3 messages.', $this->plugin);
        }
        add_action('admin_notices' , array($this, 'purge_message'));
    }
 
    protected function purge_url($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 && $this->truncateCount <= 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 />";
                    }
                }
                $this->truncateCount++;
            }
        }
 
        do_action('vcaching_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')));
            }
 
            // If Automattic's AMP is installed, add AMP permalink
            if (function_exists('amp_get_permalink')) {
                array_push($listofurls, amp_get_permalink($postId));
            }
 
            // 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->purge_cache();
    }
 
    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: ' . $ttl, true);
            if ($this->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($this, 'console_page_fields'));
        if ($this->vclGeneratorTab) {
            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', $this->plugin)?></a>
            <?php if ($this->vclGeneratorTab): ?>
                <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"><?=__('VCLs Generator', $this->plugin)?></a>
            <?php endif; ?>
        </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(isset($_POST['option_page']) && $_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" maxlength="64" 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="100" maxlength="64" value="<?php echo get_option($this->prefix . 'cookie'); ?>" />
            <span onclick="generateHash(64, 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. Use a SHA-256 hash. You can set the `logged in cookie` in default.vcl.<br />Search the default value <i>flxn34napje9kwbwr4bjwz5miiv9dhgj87dct4ep0x3arr7ldif73ovpxcgm88vs</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(isset($_POST['option_page']) && $_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(isset($_POST['option_page']) && $_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('flxn34napje9kwbwr4bjwz5miiv9dhgj87dct4ep0x3arr7ldif73ovpxcgm88vs', $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;
    }
 
    public function post_row_actions($actions, $post)
    {
        if ($this->check_if_purgeable()) {
            $actions = array_merge($actions, array(
                'vcaching_purge_post' => sprintf('<a href="%s">' . __('Purge from Varnish', $this->plugin) . '</a>', wp_nonce_url(sprintf('admin.php?page=vcaching-plugin&tab=console&action=purge_post&post_id=%d', $post->ID), $this->plugin))
            ));
        }
        return $actions;
    }
 
    public function page_row_actions($actions, $post)
    {
        if ($this->check_if_purgeable()) {
            $actions = array_merge($actions, array(
                'vcaching_purge_page' => sprintf('<a href="%s">' . __('Purge from Varnish', $this->plugin) . '</a>', wp_nonce_url(sprintf('admin.php?page=vcaching-plugin&tab=console&action=purge_page&post_id=%d', $post->ID), $this->plugin))
            ));
        }
        return $actions;
    }
}
 
$vcaching = new VCaching();
 
// WP-CLI
if (defined('WP_CLI') && WP_CLI) {
    include('wp-cli.php');
}
 
comments