4 * Name: Privacy Image Cache
6 * Author: Tobias Hößl <https://github.com/CatoTH/>
9 define("PRIVACY_IMAGE_CACHE_DEFAULT_TIME", 86400); // 1 Day
11 require_once('include/security.php');
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');
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');
29 function privacy_image_cache_module() {}
32 function privacy_image_cache_init() {
33 if(function_exists('header_remove')) {
34 header_remove('Pragma');
35 header_remove('pragma');
38 $urlhash = 'pic:' . sha1($_REQUEST['url']);
39 // Double encoded url - happens with Diaspora
40 $urlhash2 = 'pic:' . sha1(urldecode($_REQUEST['url']));
42 $r = q("SELECT * FROM `photo` WHERE `resource-id` in ('%s', '%s') LIMIT 1", $urlhash, $urlhash2);
44 $img_str = $r[0]['data'];
45 $mime = $r[0]["desc"];
46 if ($mime == "") $mime = "image/jpeg";
48 require_once("Photo.php");
50 $img_str = fetch_url($_REQUEST['url'],true);
51 if (substr($img_str, 0, 6) == "GIF89a") {
53 $image = @imagecreatefromstring($img_str);
55 if($image === FALSE) die();
57 q("INSERT INTO `photo`
58 ( `uid`, `contact-id`, `guid`, `resource-id`, `created`, `edited`, `filename`, `album`, `height`, `width`, `desc`, `data`, `scale`, `profile`, `allow_cid`, `allow_gid`, `deny_cid`, `deny_gid` )
59 VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', %d, %d, '%s', '%s', '%s', '%s' )",
60 0, 0, get_guid(), dbesc($urlhash),
61 dbesc(datetime_convert()),
62 dbesc(datetime_convert()),
63 dbesc(basename(dbesc($_REQUEST["url"]))),
65 intval(imagesy($image)),
66 intval(imagesx($image)),
71 dbesc(''), dbesc(''), dbesc(''), dbesc('')
75 $img = new Photo($img_str);
76 if($img->is_valid()) {
77 $img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100);
78 $img_str = $img->imageString();
85 header("Content-type: $mime");
86 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (3600*24)) . " GMT");
87 header("Cache-Control: max-age=" . (3600*24));
98 function privacy_image_cache_is_local_image($url) {
99 if ($url[0] == '/') return true;
100 if (strtolower(substr($url, 0, 5)) == "data:") return true;
102 // links normalised - bug #431
103 $baseurl = normalise_link(get_app()->get_baseurl());
104 $url = normalise_link($url);
105 return (substr($url, 0, strlen($baseurl)) == $baseurl);
109 * @param array $matches
112 function privacy_image_cache_img_cb($matches) {
113 // following line changed per bug #431
114 if (privacy_image_cache_is_local_image($matches[2])) return $matches[1] . $matches[2] . $matches[3];
115 return $matches[1] . get_app()->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($matches[2]))) . $matches[3];
122 function privacy_image_cache_bbcode_hook(&$a, &$o) {
123 $o = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o);
131 function privacy_image_cache_display_item_hook(&$a, &$o) {
132 if (isset($o["output"])) {
133 if (isset($o["output"]["thumb"]) && !privacy_image_cache_is_local_image($o["output"]["thumb"]))
134 $o["output"]["thumb"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["thumb"])));
135 if (isset($o["output"]["author-avatar"]) && !privacy_image_cache_is_local_image($o["output"]["author-avatar"]))
136 $o["output"]["author-avatar"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["author-avatar"])));
145 function privacy_image_cache_ping_xmlize_hook(&$a, &$o) {
146 if ($o["photo"] != "" && !privacy_image_cache_is_local_image($o["photo"]))
147 $o["photo"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["photo"])));
153 * @param null|object $b
155 function privacy_image_cache_cron(&$a = null, &$b = null) {
156 $cachetime = get_config('privacy_image_cache','cache_time');
157 if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
159 $last = get_config('pi_cache','last_delete');
161 if ($time < ($last + 3600)) return;
163 logger("Purging old Cache of the Privacy Image Cache", LOGGER_DEBUG);
164 q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%" AND `created` < NOW() - INTERVAL %d SECOND', $cachetime);
165 set_config('pi_cache', 'last_delete', $time);
173 * @param null|object $o
175 function privacy_image_cache_plugin_admin(&$a, &$o){
178 $o = '<input type="hidden" name="form_security_token" value="' . get_form_security_token("picsave") . '">';
180 $cachetime = get_config('privacy_image_cache','cache_time');
181 if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME;
182 $cachetime_h = Ceil($cachetime / 3600);
184 $o .= '<label for="pic_cachetime">' . t('Lifetime of the cache (in hours)') . '</label>
185 <input id="pic_cachetime" name="cachetime" type="text" value="' . escape_tags($cachetime_h) . '"><br style="clear: both;">';
187 $o .= '<input type="submit" name="save" value="' . t('Save') . '">';
189 $o .= '<h4>' . t('Cache Statistics') . '</h4>';
191 $num = q('SELECT COUNT(*) num, SUM(LENGTH(data)) size FROM `photo` WHERE `uid`=0 AND `contact-id`=0 AND `resource-id` LIKE "pic:%%"');
192 $o .= '<label for="statictics_num">' . t('Number of items') . '</label><input style="color: gray;" id="statistics_num" disabled value="' . escape_tags($num[0]['num']) . '"><br style="clear: both;">';
193 $size = Ceil($num[0]['size'] / (1024 * 1024));
194 $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;">';
196 $o .= '<input type="submit" name="delete_all" value="' . t('Delete the whole cache') . '">';
202 * @param null|object $o
204 function privacy_image_cache_plugin_admin_post(&$a = null, &$o = null){
205 check_form_security_token_redirectOnErr('/admin/plugins/privacy_image_cache', 'picsave');
207 if (isset($_REQUEST['save'])) {
208 $cachetime_h = IntVal($_REQUEST['cachetime']);
209 if ($cachetime_h < 1) $cachetime_h = 1;
210 set_config('privacy_image_cache','cache_time', $cachetime_h * 3600);
212 if (isset($_REQUEST['delete_all'])) {
213 q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%"');