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