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 $a;
  36
  37         if ($a->config["system"]["db_log"] != "")
  38                 $stamp1 = microtime(true);
  39
  40         if(function_exists('header_remove')) {
  41                 header_remove('Pragma');
  42                 header_remove('pragma');
  43         }
  44
  45         $urlhash = 'pic:' . sha1($_REQUEST['url']);
  46         // Double encoded url - happens with Diaspora
  47         $urlhash2 = 'pic:' . sha1(urldecode($_REQUEST['url']));
  48
  49         $cache = get_config('system','itemcache');
  50         if (($cache != '') and is_dir($cache)) {
  51                 $cachefile = $cache."/".hash("md5", $_REQUEST['url']);
  52                 if (file_exists($cachefile)) {
  53                         $img_str = file_get_contents($cachefile);
  54
  55                         $mime = image_type_to_mime_type(exif_imagetype($cachefile));
  56
  57                         header("Content-type: $mime");
  58                         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
  59                         header("Cache-Control: max-age=" . (3600*24));
  60
  61                         echo $img_str;
  62
  63                         if ($a->config["system"]["db_log"] != "") {
  64                                 $stamp2 = microtime(true);
  65                                 $duration = round($stamp2-$stamp1, 3);
  66                                 if ($duration > $a->config["system"]["db_loglimit"])
  67                                         @file_put_contents($a->config["system"]["db_log"], $duration."\t".strlen($img_str)."\t".$_REQUEST['url']."\n", FILE_APPEND);
  68                         }
  69
  70                         killme();
  71                 }
  72         }
  73
  74         require_once("Photo.php");
  75
  76         $r = q("SELECT * FROM `photo` WHERE `resource-id` in ('%s', '%s') LIMIT 1", $urlhash, $urlhash2);
  77         if (count($r)) {
  78                 $img_str = $r[0]['data'];
  79                 $mime = $r[0]["desc"];
  80                 if ($mime == "") $mime = "image/jpeg";
  81
  82                 // Test
  83                 //if ($mime == "image/jpeg") {
  84                 //      $img = new Photo($img_str);
  85                 //      if($img->is_valid()) {
  86                 //              $img->scaleImage(1000);
  87                 //              $img_str = $img->imageString();
  88                 //      }
  89                 //}
  90         } else {
  91                 // It shouldn't happen but it does - spaces in URL
  92                 $_REQUEST['url'] = str_replace(" ", "+", $_REQUEST['url']);
  93
  94                 $img_str = fetch_url($_REQUEST['url'],true);
  95
  96                 $tempfile = tempnam("", "cache");
  97                 file_put_contents($tempfile, $img_str);
  98                 $mime = image_type_to_mime_type(exif_imagetype($tempfile));
  99                 unlink($tempfile);
 100
 101                 // If there is an error then return a blank image
 102                 if ((substr($a->get_curl_code(), 0, 1) == "4") or (!$img_str)) {
 103                         $img_str = file_get_contents("images/blank.png");
 104                         $mime = "image/png";
 105                 //} else if (substr($img_str, 0, 6) == "GIF89a") {
 106                 } else if ($mime != "image/jpeg") {
 107                         $image = @imagecreatefromstring($img_str);
 108
 109                         if($image === FALSE) die();
 110
 111                         q("INSERT INTO `photo`
 112                         ( `uid`, `contact-id`, `guid`, `resource-id`, `created`, `edited`, `filename`, `album`, `height`, `width`, `desc`, `data`, `scale`, `profile`, `allow_cid`, `allow_gid`, `deny_cid`, `deny_gid` )
 113                         VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', %d, %d, '%s', '%s', '%s', '%s' )",
 114                                 0, 0, get_guid(), dbesc($urlhash),
 115                                 dbesc(datetime_convert()),
 116                                 dbesc(datetime_convert()),
 117                                 dbesc(basename(dbesc($_REQUEST["url"]))),
 118                                 dbesc(''),
 119                                 intval(imagesy($image)),
 120                                 intval(imagesx($image)),
 121                                 $mime,
 122                                 dbesc($img_str),
 123                                 100,
 124                                 intval(0),
 125                                 dbesc(''), dbesc(''), dbesc(''), dbesc('')
 126                         );
 127
 128                 } else {
 129                         $img = new Photo($img_str);
 130                         if($img->is_valid()) {
 131                                 $img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100);
 132                                 //$img->scaleImage(1000); // Test
 133                                 $img_str = $img->imageString();
 134                         }
 135                         $mime = "image/jpeg";
 136                 }
 137         }
 138
 139         // Writing in cachefile
 140         if (isset($cachefile) && ($cachefile != '') and (file_exists($cachefile)) and (exif_imagetype($cachefile) > 0))
 141                 file_put_contents($cachefile, $img_str);
 142
 143         header("Content-type: $mime");
 144         header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
 145         header("Cache-Control: max-age=" . (3600*24));
 146
 147         echo $img_str;
 148
 149         if ($a->config["system"]["db_log"] != "") {
 150                 $stamp2 = microtime(true);
 151                 $duration = round($stamp2-$stamp1, 3);
 152                 if ($duration > $a->config["system"]["db_loglimit"])
 153                         @file_put_contents($a->config["system"]["db_log"], $duration."\t".strlen($img_str)."\t".$_REQUEST['url']."\n", FILE_APPEND);
 154         }
 155
 156         killme();
 157 }
 158
 159 /**
 160  * @param $url string
 161  * @return boolean
 162  */
 163 function privacy_image_cache_is_local_image($url) {
 164     if ($url[0] == '/') return true;
 165         if (strtolower(substr($url, 0, 5)) == "data:") return true;
 166
 167         // links normalised - bug #431
 168     $baseurl = normalise_link(get_app()->get_baseurl());
 169         $url = normalise_link($url);
 170     return (substr($url, 0, strlen($baseurl)) == $baseurl);
 171 }
 172
 173 /**
 174  * @param array $matches
 175  * @return string
 176  */
 177 function privacy_image_cache_img_cb($matches) {
 178         // following line changed per bug #431
 179         if (privacy_image_cache_is_local_image($matches[2]))
 180                 return $matches[1] . $matches[2] . $matches[3];
 181
 182         return $matches[1] . get_app()->get_baseurl() . "/privacy_image_cache/?url=" . addslashes(rawurlencode(htmlspecialchars_decode($matches[2]))) . $matches[3];
 183 }
 184
 185 /**
 186  * @param App $a
 187  * @param string $o
 188  */
 189 function privacy_image_cache_prepare_body_hook(&$a, &$o) {
 190         $o["html"] = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o["html"]);
 191 }
 192
 193 /**
 194  * @param App $a
 195  * @param string $o
 196  * Function disabled because the plugin moved
 197  */
 198 function privacy_image_cache_bbcode_hook(&$a, &$o) {
 199         //$o = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o);
 200 }
 201
 202
 203 /**
 204  * @param App $a
 205  * @param string $o
 206  */
 207 function privacy_image_cache_display_item_hook(&$a, &$o) {
 208     if (isset($o["output"])) {
 209         if (isset($o["output"]["thumb"]) && !privacy_image_cache_is_local_image($o["output"]["thumb"]))
 210             $o["output"]["thumb"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["thumb"])));
 211         if (isset($o["output"]["author-avatar"]) && !privacy_image_cache_is_local_image($o["output"]["author-avatar"]))
 212             $o["output"]["author-avatar"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["author-avatar"])));
 213     }
 214 }
 215
 216
 217 /**
 218  * @param App $a
 219  * @param string $o
 220  */
 221 function privacy_image_cache_ping_xmlize_hook(&$a, &$o) {
 222     if ($o["photo"] != "" && !privacy_image_cache_is_local_image($o["photo"]))
 223         $o["photo"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["photo"])));
 224 }
 225
 226
 227 /**
 228  * @param App $a
 229  * @param null|object $b
 230  */
 231 function privacy_image_cache_cron(&$a = null, &$b = null) {
 232     $cachetime = get_config('privacy_image_cache','cache_time');
 233     if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
 234
 235     $last = get_config('pi_cache','last_delete');
 236     $time = time();
 237     if ($time < ($last + 3600)) return;
 238
 239     logger("Purging old Cache of the Privacy Image Cache", LOGGER_DEBUG);
 240     q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%" AND `created` < NOW() - INTERVAL %d SECOND', $cachetime);
 241     set_config('pi_cache', 'last_delete', $time);
 242 }
 243
 244
 245
 246
 247 /**
 248  * @param App $a
 249  * @param null|object $o
 250  */
 251 function privacy_image_cache_plugin_admin(&$a, &$o){
 252
 253
 254     $o = '<input type="hidden" name="form_security_token" value="' . get_form_security_token("picsave") . '">';
 255
 256     $cachetime = get_config('privacy_image_cache','cache_time');
 257     if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
 258     $cachetime_h = Ceil($cachetime / 3600);
 259
 260     $o .= '<label for="pic_cachetime">' . t('Lifetime of the cache (in hours)') . '</label>
 261         <input id="pic_cachetime" name="cachetime" type="text" value="' . escape_tags($cachetime_h) . '"><br style="clear: both;">';
 262
 263     $o .= '<input type="submit" name="save" value="' . t('Save') . '">';
 264
 265     $o .= '<h4>' . t('Cache Statistics') . '</h4>';
 266
 267     $num = q('SELECT COUNT(*) num, SUM(LENGTH(data)) size FROM `photo` WHERE `uid`=0 AND `contact-id`=0 AND `resource-id` LIKE "pic:%%"');
 268     $o .= '<label for="statictics_num">' . t('Number of items') . '</label><input style="color: gray;" id="statistics_num" disabled value="' . escape_tags($num[0]['num']) . '"><br style="clear: both;">';
 269     $size = Ceil($num[0]['size'] / (1024 * 1024));
 270     $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;">';
 271
 272     $o .= '<input type="submit" name="delete_all" value="' . t('Delete the whole cache') . '">';
 273 }
 274
 275
 276 /**
 277  * @param App $a
 278  * @param null|object $o
 279  */
 280 function privacy_image_cache_plugin_admin_post(&$a = null, &$o = null){
 281     check_form_security_token_redirectOnErr('/admin/plugins/privacy_image_cache', 'picsave');
 282
 283     if (isset($_REQUEST['save'])) {
 284         $cachetime_h = IntVal($_REQUEST['cachetime']);
 285         if ($cachetime_h < 1) $cachetime_h = 1;
 286         set_config('privacy_image_cache','cache_time', $cachetime_h * 3600);
 287     }
 288     if (isset($_REQUEST['delete_all'])) {
 289         q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%"');
 290     }
 291 }