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('prepare_body', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_prepare_body_hook');
  15  //   register_hook('bbcode',       'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
  16     register_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
  17     register_hook('ping_xmlize',  'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
  18     register_hook('cron',         'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron');
  19 }
  20
  21
  22 function privacy_image_cache_uninstall() {
  23     unregister_hook('prepare_body', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_prepare_body_hook');
  24     unregister_hook('bbcode',       'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook');
  25     unregister_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook');
  26     unregister_hook('ping_xmlize',  'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook');
  27     unregister_hook('cron',         'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron');
  28 }
  29
  30
  31 function privacy_image_cache_module() {}
  32
  33
  34 function privacy_image_cache_init() {
  35         global $a;
  36
  37         if(function_exists('header_remove')) {
  38                 header_remove('Pragma');
  39                 header_remove('pragma');
  40         }
  41
  42         $urlhash = 'pic:' . sha1($_REQUEST['url']);
  43         // Double encoded url - happens with Diaspora
  44         $urlhash2 = 'pic:' . sha1(urldecode($_REQUEST['url']));
  45
  46         $r = q("SELECT * FROM `photo` WHERE `resource-id` in ('%s', '%s') LIMIT 1", $urlhash, $urlhash2);
  47         if (count($r)) {
  48                 $img_str = $r[0]['data'];
  49                 $mime = $r[0]["desc"];
  50                 if ($mime == "") $mime = "image/jpeg";
  51         } else {
  52                 require_once("Photo.php");
  53
  54                 $img_str = fetch_url($_REQUEST['url'],true);
  55
  56                 $tempfile = tempnam("", "cache");
  57                 file_put_contents($tempfile, $img_str);
  58                 $mime = image_type_to_mime_type(exif_imagetype($tempfile));
  59                 unlink($tempfile);
  60
  61                 // If there is an error then return a blank image
  62                 if ((substr($a->get_curl_code(), 0, 1) == "4") or (!$img_str)) {
  63                         $img_str = file_get_contents("images/blank.png");
  64                         $mime = "image/png";
  65                 //} else if (substr($img_str, 0, 6) == "GIF89a") {
  66                 } else if ($mime != "image/jpeg") {
  67                         $image = @imagecreatefromstring($img_str);
  68
  69                         if($image === FALSE) die();
  70
  71                         q("INSERT INTO `photo`
  72                         ( `uid`, `contact-id`, `guid`, `resource-id`, `created`, `edited`, `filename`, `album`, `height`, `width`, `desc`, `data`, `scale`, `profile`, `allow_cid`, `allow_gid`, `deny_cid`, `deny_gid` )
  73                         VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', %d, %d, '%s', '%s', '%s', '%s' )",
  74                                 0, 0, get_guid(), dbesc($urlhash),
  75                                 dbesc(datetime_convert()),
  76                                 dbesc(datetime_convert()),
  77                                 dbesc(basename(dbesc($_REQUEST["url"]))),
  78                                 dbesc(''),
  79                                 intval(imagesy($image)),
  80                                 intval(imagesx($image)),
  81                                 $mime,
  82                                 dbesc($img_str),
  83                                 100,
  84                                 intval(0),
  85                                 dbesc(''), dbesc(''), dbesc(''), dbesc('')
  86                         );
  87
  88                 } else {
  89                         $img = new Photo($img_str);
  90                         if($img->is_valid()) {
  91                                 $img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100);
  92                                 $img_str = $img->imageString();
  93                         }
  94                         $mime = "image/jpeg";
  95                 }
  96         }
  97
  98         header("Content-type: $mime");
  99         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
 100         header("Cache-Control: max-age=" . (3600*24));
 101
 102         echo $img_str;
 103
 104         killme();
 105 }
 106
 107 /**
 108  * @param $url string
 109  * @return boolean
 110  */
 111 function privacy_image_cache_is_local_image($url) {
 112     if ($url[0] == '/') return true;
 113         if (strtolower(substr($url, 0, 5)) == "data:") return true;
 114
 115         // links normalised - bug #431
 116     $baseurl = normalise_link(get_app()->get_baseurl());
 117         $url = normalise_link($url);
 118     return (substr($url, 0, strlen($baseurl)) == $baseurl);
 119 }
 120
 121 /**
 122  * @param array $matches
 123  * @return string
 124  */
 125 function privacy_image_cache_img_cb($matches) {
 126         // following line changed per bug #431
 127         if (privacy_image_cache_is_local_image($matches[2]))
 128                 return $matches[1] . $matches[2] . $matches[3];
 129
 130         return $matches[1] . get_app()->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($matches[2]))) . $matches[3];
 131 }
 132
 133 /**
 134  * @param App $a
 135  * @param string $o
 136  */
 137 function privacy_image_cache_prepare_body_hook(&$a, &$o) {
 138         $o["html"] = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o["html"]);
 139 }
 140
 141 /**
 142  * @param App $a
 143  * @param string $o
 144  * Function disabled because the plugin moved
 145  */
 146 function privacy_image_cache_bbcode_hook(&$a, &$o) {
 147         //$o = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o);
 148 }
 149
 150
 151 /**
 152  * @param App $a
 153  * @param string $o
 154  */
 155 function privacy_image_cache_display_item_hook(&$a, &$o) {
 156     if (isset($o["output"])) {
 157         if (isset($o["output"]["thumb"]) && !privacy_image_cache_is_local_image($o["output"]["thumb"]))
 158             $o["output"]["thumb"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["thumb"])));
 159         if (isset($o["output"]["author-avatar"]) && !privacy_image_cache_is_local_image($o["output"]["author-avatar"]))
 160             $o["output"]["author-avatar"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["author-avatar"])));
 161     }
 162 }
 163
 164
 165 /**
 166  * @param App $a
 167  * @param string $o
 168  */
 169 function privacy_image_cache_ping_xmlize_hook(&$a, &$o) {
 170     if ($o["photo"] != "" && !privacy_image_cache_is_local_image($o["photo"]))
 171         $o["photo"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["photo"])));
 172 }
 173
 174
 175 /**
 176  * @param App $a
 177  * @param null|object $b
 178  */
 179 function privacy_image_cache_cron(&$a = null, &$b = null) {
 180     $cachetime = get_config('privacy_image_cache','cache_time');
 181     if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
 182
 183     $last = get_config('pi_cache','last_delete');
 184     $time = time();
 185     if ($time < ($last + 3600)) return;
 186
 187     logger("Purging old Cache of the Privacy Image Cache", LOGGER_DEBUG);
 188     q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%" AND `created` < NOW() - INTERVAL %d SECOND', $cachetime);
 189     set_config('pi_cache', 'last_delete', $time);
 190 }
 191
 192
 193
 194
 195 /**
 196  * @param App $a
 197  * @param null|object $o
 198  */
 199 function privacy_image_cache_plugin_admin(&$a, &$o){
 200
 201
 202     $o = '<input type="hidden" name="form_security_token" value="' . get_form_security_token("picsave") . '">';
 203
 204     $cachetime = get_config('privacy_image_cache','cache_time');
 205     if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
 206     $cachetime_h = Ceil($cachetime / 3600);
 207
 208     $o .= '<label for="pic_cachetime">' . t('Lifetime of the cache (in hours)') . '</label>
 209         <input id="pic_cachetime" name="cachetime" type="text" value="' . escape_tags($cachetime_h) . '"><br style="clear: both;">';
 210
 211     $o .= '<input type="submit" name="save" value="' . t('Save') . '">';
 212
 213     $o .= '<h4>' . t('Cache Statistics') . '</h4>';
 214
 215     $num = q('SELECT COUNT(*) num, SUM(LENGTH(data)) size FROM `photo` WHERE `uid`=0 AND `contact-id`=0 AND `resource-id` LIKE "pic:%%"');
 216     $o .= '<label for="statictics_num">' . t('Number of items') . '</label><input style="color: gray;" id="statistics_num" disabled value="' . escape_tags($num[0]['num']) . '"><br style="clear: both;">';
 217     $size = Ceil($num[0]['size'] / (1024 * 1024));
 218     $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;">';
 219
 220     $o .= '<input type="submit" name="delete_all" value="' . t('Delete the whole cache') . '">';
 221 }
 222
 223
 224 /**
 225  * @param App $a
 226  * @param null|object $o
 227  */
 228 function privacy_image_cache_plugin_admin_post(&$a = null, &$o = null){
 229     check_form_security_token_redirectOnErr('/admin/plugins/privacy_image_cache', 'picsave');
 230
 231     if (isset($_REQUEST['save'])) {
 232         $cachetime_h = IntVal($_REQUEST['cachetime']);
 233         if ($cachetime_h < 1) $cachetime_h = 1;
 234         set_config('privacy_image_cache','cache_time', $cachetime_h * 3600);
 235     }
 236     if (isset($_REQUEST['delete_all'])) {
 237         q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%"');
 238     }
 239 }