privacy_image_cache/privacy_image_cache.php

   1 <?php
   2
   3 /**
   4  * Name: Privacy Image Cache
   5  * Version: 0.1
   6  * Author: Tobias Hößl <https://github.com/CatoTH/>
   7  */
   8
   9 define("PRIVACY_IMAGE_CACHE_DEFAULT_TIME", 86400); // 1 Day
  10
  11 require_once('include/security.php');
  12
  13 function privacy_image_cache_install() {
  14     register_hook('bbcode',       'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
  15     register_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
  16     register_hook('ping_xmlize',  'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
  17     register_hook('cron',         'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron');
  18 }
  19
  20
  21 function privacy_image_cache_uninstall() {
  22     unregister_hook('bbcode',       'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
  23     unregister_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
  24     unregister_hook('ping_xmlize',  'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
  25     unregister_hook('cron',         'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron');
  26 }
  27
  28
  29 function privacy_image_cache_module() {}
  30
  31
  32 function privacy_image_cache_init() {
  33     $urlhash = 'pic:' . sha1($_REQUEST['url']);
  34     $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' LIMIT 1", $urlhash );
  35     if (count($r)) {
  36         $img_str = $r[0]['data'];
  37                 $mime = $r[0]["desc"];
  38                 if ($mime == "") $mime = "image/jpeg";
  39     }
  40     else {
  41         require_once("Photo.php");
  42
  43         $img_str = fetch_url($_REQUEST['url'],true);
  44                 if (substr($img_str, 0, 6) == "GIF89a") {
  45                         $mime = "image/gif";
  46                         $image = @imagecreatefromstring($img_str);
  47
  48                         if($image === FALSE) die();
  49
  50                         q("INSERT INTO `photo`
  51                         ( `uid`, `contact-id`, `guid`, `resource-id`, `created`, `edited`, `filename`, `album`, `height`, `width`, `desc`, `data`, `scale`, `profile`, `allow_cid`, `allow_gid`, `deny_cid`, `deny_gid` )
  52                         VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', %d, %d, '%s', '%s', '%s', '%s' )",
  53                                 0, 0, get_guid(), dbesc($urlhash),
  54                                 dbesc(datetime_convert()),
  55                                 dbesc(datetime_convert()),
  56                                 dbesc(basename(dbesc($_REQUEST["url"]))),
  57                                 dbesc(''),
  58                                 intval(imagesy($image)),
  59                                 intval(imagesx($image)),
  60                                 'image/gif',
  61                                 dbesc($img_str),
  62                                 100,
  63                                 intval(0),
  64                                 dbesc(''), dbesc(''), dbesc(''), dbesc('')
  65                         );
  66
  67                 } else {
  68                         $img = new Photo($img_str);
  69                         if($img->is_valid()) {
  70                                 $img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100);
  71                                 $img_str = $img->imageString();
  72                         }
  73                         $mime = "image/jpeg";
  74                 }
  75     }
  76
  77
  78     header("Content-type: $mime");
  79     header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
  80     header("Cache-Control: max-age=" . (3600*24));
  81
  82     echo $img_str;
  83
  84     killme();
  85 }
  86
  87 /**
  88  * @param $url string
  89  * @return boolean
  90  */
  91 function privacy_image_cache_is_local_image($url) {
  92     if ($url[0] == '/') return true;
  93         // links normalised - bug #431
  94     $baseurl = normalise_link(get_app()->get_baseurl());
  95         $url = normalise_link($url);
  96     return (substr($url, 0, strlen($baseurl)) == $baseurl);
  97 }
  98
  99 /**
 100  * @param array $matches
 101  * @return string
 102  */
 103 function privacy_image_cache_img_cb($matches) {
 104         // following line changed per bug #431
 105     if (privacy_image_cache_is_local_image($matches[2])) return $matches[1] . $matches[2] . $matches[3];
 106     return $matches[1] . get_app()->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($matches[2]))) . $matches[3];
 107 }
 108
 109 /**
 110  * @param App $a
 111  * @param string $o
 112  */
 113 function privacy_image_cache_bbcode_hook(&$a, &$o) {
 114     $o = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o);
 115 }
 116
 117
 118 /**
 119  * @param App $a
 120  * @param string $o
 121  */
 122 function privacy_image_cache_display_item_hook(&$a, &$o) {
 123     if (isset($o["output"])) {
 124         if (isset($o["output"]["thumb"]) && !privacy_image_cache_is_local_image($o["output"]["thumb"]))
 125             $o["output"]["thumb"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["thumb"])));
 126         if (isset($o["output"]["author-avatar"]) && !privacy_image_cache_is_local_image($o["output"]["author-avatar"]))
 127             $o["output"]["author-avatar"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["author-avatar"])));
 128     }
 129 }
 130
 131
 132 /**
 133  * @param App $a
 134  * @param string $o
 135  */
 136 function privacy_image_cache_ping_xmlize_hook(&$a, &$o) {
 137     if ($o["photo"] != "" && !privacy_image_cache_is_local_image($o["photo"]))
 138         $o["photo"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["photo"])));
 139 }
 140
 141
 142 /**
 143  * @param App $a
 144  * @param null|object $b
 145  */
 146 function privacy_image_cache_cron(&$a = null, &$b = null) {
 147     $cachetime = get_config('privacy_image_cache','cache_time');
 148     if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
 149
 150     $last = get_config('pi_cache','last_delete');
 151     $time = time();
 152     if ($time < ($last + 3600)) return;
 153
 154     logger("Purging old Cache of the Privacy Image Cache", LOGGER_DEBUG);
 155     q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%" AND `created` < NOW() - INTERVAL %d SECOND', $cachetime);
 156     set_config('pi_cache', 'last_delete', $time);
 157 }
 158
 159
 160
 161
 162 /**
 163  * @param App $a
 164  * @param null|object $o
 165  */
 166 function privacy_image_cache_plugin_admin(&$a, &$o){
 167
 168
 169     $o = '<input type="hidden" name="form_security_token" value="' . get_form_security_token("picsave") . '">';
 170
 171     $cachetime = get_config('privacy_image_cache','cache_time');
 172     if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
 173     $cachetime_h = Ceil($cachetime / 3600);
 174
 175     $o .= '<label for="pic_cachetime">' . t('Lifetime of the cache (in hours)') . '</label>
 176         <input id="pic_cachetime" name="cachetime" type="text" value="' . escape_tags($cachetime_h) . '"><br style="clear: both;">';
 177
 178     $o .= '<input type="submit" name="save" value="' . t('Save') . '">';
 179
 180     $o .= '<h4>' . t('Cache Statistics') . '</h4>';
 181
 182     $num = q('SELECT COUNT(*) num, SUM(LENGTH(data)) size FROM `photo` WHERE `uid`=0 AND `contact-id`=0 AND `resource-id` LIKE "pic:%%"');
 183     $o .= '<label for="statictics_num">' . t('Number of items') . '</label><input style="color: gray;" id="statistics_num" disabled value="' . escape_tags($num[0]['num']) . '"><br style="clear: both;">';
 184     $size = Ceil($num[0]['size'] / (1024 * 1024));
 185     $o .= '<label for="statictics_size">' . t('Size of the cache') . '</label><input style="color: gray;" id="statistics_size" disabled value="' . $size . ' MB"><br style="clear: both;">';
 186
 187     $o .= '<input type="submit" name="delete_all" value="' . t('Delete the whole cache') . '">';
 188 }
 189
 190
 191 /**
 192  * @param App $a
 193  * @param null|object $o
 194  */
 195 function privacy_image_cache_plugin_admin_post(&$a = null, &$o = null){
 196     check_form_security_token_redirectOnErr('/admin/plugins/privacy_image_cache', 'picsave');
 197
 198     if (isset($_REQUEST['save'])) {
 199         $cachetime_h = IntVal($_REQUEST['cachetime']);
 200         if ($cachetime_h < 1) $cachetime_h = 1;
 201         set_config('privacy_image_cache','cache_time', $cachetime_h * 3600);
 202     }
 203     if (isset($_REQUEST['delete_all'])) {
 204         q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%"');
 205     }
 206 }