<?php /** * Name: Privacy Image Cache * Version: 0.1 * Author: Tobias Hößl <https://github.com/CatoTH/> */ define("PRIVACY_IMAGE_CACHE_DEFAULT_TIME", 86400); // 1 Day require_once('include/security.php'); function privacy_image_cache_install() { register_hook('prepare_body', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_prepare_body_hook'); // register_hook('bbcode', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook'); register_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook'); register_hook('ping_xmlize', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook'); register_hook('cron', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron'); } function privacy_image_cache_uninstall() { unregister_hook('prepare_body', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_prepare_body_hook'); unregister_hook('bbcode', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_bbcode_hook'); unregister_hook('display_item', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_display_item_hook'); unregister_hook('ping_xmlize', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_ping_xmlize_hook'); unregister_hook('cron', 'addon/privacy_image_cache/privacy_image_cache.php', 'privacy_image_cache_cron'); } function privacy_image_cache_module() {} function privacy_image_cache_init() { global $a, $_SERVER; if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) { header('HTTP/1.1 304 Not Modified'); header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT"); header('Etag: '.$_SERVER['HTTP_IF_NONE_MATCH']); header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT"); header("Cache-Control: max-age=31536000"); if(function_exists('header_remove')) { header_remove('Last-Modified'); header_remove('Expires'); header_remove('Cache-Control'); } exit; } if ($a->config["system"]["db_log"] != "") $stamp1 = microtime(true); if(function_exists('header_remove')) { header_remove('Pragma'); header_remove('pragma'); } $urlhash = 'pic:' . sha1($_REQUEST['url']); // Double encoded url - happens with Diaspora $urlhash2 = 'pic:' . sha1(urldecode($_REQUEST['url'])); $cachefile = get_cachefile(hash("md5", $_REQUEST['url'])); if ($cachefile != '') { if (file_exists($cachefile)) { $img_str = file_get_contents($cachefile); $mime = image_type_to_mime_type(exif_imagetype($cachefile)); header("Content-type: $mime"); header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT"); header('Etag: "'.md5($img_str).'"'); header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT"); header("Cache-Control: max-age=31536000"); echo $img_str; if ($a->config["system"]["db_log"] != "") { $stamp2 = microtime(true); $duration = round($stamp2-$stamp1, 3); if ($duration > $a->config["system"]["db_loglimit"]) @file_put_contents($a->config["system"]["db_log"], $duration."\t".strlen($img_str)."\t".$_REQUEST['url']."\n", FILE_APPEND); } killme(); } } require_once("Photo.php"); $r = q("SELECT * FROM `photo` WHERE `resource-id` in ('%s', '%s') LIMIT 1", $urlhash, $urlhash2); if (count($r)) { $img_str = $r[0]['data']; $mime = $r[0]["desc"]; if ($mime == "") $mime = "image/jpeg"; } else { // It shouldn't happen but it does - spaces in URL $_REQUEST['url'] = str_replace(" ", "+", $_REQUEST['url']); $img_str = fetch_url($_REQUEST['url'],true); $tempfile = tempnam(get_config("system","temppath"), "cache"); file_put_contents($tempfile, $img_str); $mime = image_type_to_mime_type(exif_imagetype($tempfile)); unlink($tempfile); // If there is an error then return a blank image if ((substr($a->get_curl_code(), 0, 1) == "4") or (!$img_str)) { $img_str = file_get_contents("images/blank.png"); $mime = "image/png"; $cachefile = ""; // Clear the cachefile so that the dummy isn't stored $img = new Photo($img_str); if($img->is_valid()) { $img->scaleImage(1); $img_str = $img->imageString(); } //} else if (substr($img_str, 0, 6) == "GIF89a") { } else if ($mime != "image/jpeg") { $image = @imagecreatefromstring($img_str); if($image === FALSE) die(); q("INSERT INTO `photo` ( `uid`, `contact-id`, `guid`, `resource-id`, `created`, `edited`, `filename`, `album`, `height`, `width`, `desc`, `data`, `scale`, `profile`, `allow_cid`, `allow_gid`, `deny_cid`, `deny_gid` ) VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', %d, %d, '%s', '%s', '%s', '%s' )", 0, 0, get_guid(), dbesc($urlhash), dbesc(datetime_convert()), dbesc(datetime_convert()), dbesc(basename(dbesc($_REQUEST["url"]))), dbesc(''), intval(imagesy($image)), intval(imagesx($image)), $mime, dbesc($img_str), 100, intval(0), dbesc(''), dbesc(''), dbesc(''), dbesc('') ); } else { $img = new Photo($img_str); if($img->is_valid()) { $img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100); //$img->scaleImage(1000); // Test $img_str = $img->imageString(); } $mime = "image/jpeg"; } } // Writing in cachefile // and (file_exists($cachefile)) and (exif_imagetype($cachefile) > 0)) if ($cachefile != '') file_put_contents($cachefile, $img_str); header("Content-type: $mime"); header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT"); header('Etag: "'.md5($img_str).'"'); header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT"); header("Cache-Control: max-age=31536000"); echo $img_str; if ($a->config["system"]["db_log"] != "") { $stamp2 = microtime(true); $duration = round($stamp2-$stamp1, 3); if ($duration > $a->config["system"]["db_loglimit"]) @file_put_contents($a->config["system"]["db_log"], $duration."\t".strlen($img_str)."\t".$_REQUEST['url']."\n", FILE_APPEND); } killme(); } /** * @param $url string * @return boolean */ function privacy_image_cache_is_local_image($url) { if ($url[0] == '/') return true; if (strtolower(substr($url, 0, 5)) == "data:") return true; // links normalised - bug #431 $baseurl = normalise_link(get_app()->get_baseurl()); $url = normalise_link($url); return (substr($url, 0, strlen($baseurl)) == $baseurl); } /** * @param array $matches * @return string */ function privacy_image_cache_img_cb($matches) { // following line changed per bug #431 if (privacy_image_cache_is_local_image($matches[2])) return $matches[1] . $matches[2] . $matches[3]; return $matches[1] . get_app()->get_baseurl() . "/privacy_image_cache/?url=" . addslashes(rawurlencode(htmlspecialchars_decode($matches[2]))) . $matches[3]; } /** * @param App $a * @param string $o */ function privacy_image_cache_prepare_body_hook(&$a, &$o) { $o["html"] = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o["html"]); } /** * @param App $a * @param string $o * Function disabled because the plugin moved */ function privacy_image_cache_bbcode_hook(&$a, &$o) { //$o = preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "privacy_image_cache_img_cb", $o); } /** * @param App $a * @param string $o */ function privacy_image_cache_display_item_hook(&$a, &$o) { if (isset($o["output"])) { if (isset($o["output"]["thumb"]) && !privacy_image_cache_is_local_image($o["output"]["thumb"])) $o["output"]["thumb"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["thumb"]))); if (isset($o["output"]["author-avatar"]) && !privacy_image_cache_is_local_image($o["output"]["author-avatar"])) $o["output"]["author-avatar"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["author-avatar"]))); if (isset($o["output"]["owner-avatar"]) && !privacy_image_cache_is_local_image($o["output"]["owner-avatar"])) $o["output"]["owner-avatar"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["output"]["owner-avatar"]))); } } /** * @param App $a * @param string $o */ function privacy_image_cache_ping_xmlize_hook(&$a, &$o) { if ($o["photo"] != "" && !privacy_image_cache_is_local_image($o["photo"])) $o["photo"] = $a->get_baseurl() . "/privacy_image_cache/?url=" . escape_tags(addslashes(rawurlencode($o["photo"]))); } /** * @param App $a * @param null|object $b */ function privacy_image_cache_cron(&$a = null, &$b = null) { $cachetime = get_config('privacy_image_cache','cache_time'); if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME; $last = get_config('pi_cache','last_delete'); $time = time(); if ($time < ($last + 3600)) return; logger("Purging old Cache of the Privacy Image Cache", LOGGER_DEBUG); q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%" AND `created` < NOW() - INTERVAL %d SECOND', $cachetime); set_config('pi_cache', 'last_delete', $time); } /** * @param App $a * @param null|object $o */ function privacy_image_cache_plugin_admin(&$a, &$o){ $o = '<input type="hidden" name="form_security_token" value="' . get_form_security_token("picsave") . '">'; $cachetime = get_config('privacy_image_cache','cache_time'); if (!$cachetime) $cachetime = PRIVACY_IMAGE_CACHE_DEFAULT_TIME; $cachetime_h = Ceil($cachetime / 3600); $o .= '<label for="pic_cachetime">' . t('Lifetime of the cache (in hours)') . '</label> <input id="pic_cachetime" name="cachetime" type="text" value="' . escape_tags($cachetime_h) . '"><br style="clear: both;">'; $o .= '<input type="submit" name="save" value="' . t('Save') . '">'; $o .= '<h4>' . t('Cache Statistics') . '</h4>'; $num = q('SELECT COUNT(*) num, SUM(LENGTH(data)) size FROM `photo` WHERE `uid`=0 AND `contact-id`=0 AND `resource-id` LIKE "pic:%%"'); $o .= '<label for="statictics_num">' . t('Number of items') . '</label><input style="color: gray;" id="statistics_num" disabled value="' . escape_tags($num[0]['num']) . '"><br style="clear: both;">'; $size = Ceil($num[0]['size'] / (1024 * 1024)); $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;">'; $o .= '<input type="submit" name="delete_all" value="' . t('Delete the whole cache') . '">'; } /** * @param App $a * @param null|object $o */ function privacy_image_cache_plugin_admin_post(&$a = null, &$o = null){ check_form_security_token_redirectOnErr('/admin/plugins/privacy_image_cache', 'picsave'); if (isset($_REQUEST['save'])) { $cachetime_h = IntVal($_REQUEST['cachetime']); if ($cachetime_h < 1) $cachetime_h = 1; set_config('privacy_image_cache','cache_time', $cachetime_h * 3600); } if (isset($_REQUEST['delete_all'])) { q('DELETE FROM `photo` WHERE `uid` = 0 AND `resource-id` LIKE "pic:%%"'); } }