+++ /dev/null
-<?php
-/**
- * @file mod/proxy.php
- * @brief Based upon "Privacy Image Cache" by Tobias Hößl <https://github.com/CatoTH/>
- */
-
-use Friendica\App;
-use Friendica\Core\Config;
-use Friendica\Core\System;
-use Friendica\Database\DBA;
-use Friendica\Model\Photo;
-use Friendica\Object\Image;
-use Friendica\Util\DateTimeFormat;
-use Friendica\Util\Network;
-
-define('PROXY_DEFAULT_TIME', 86400); // 1 Day
-
-define('PROXY_SIZE_MICRO', 'micro');
-define('PROXY_SIZE_THUMB', 'thumb');
-define('PROXY_SIZE_SMALL', 'small');
-define('PROXY_SIZE_MEDIUM', 'medium');
-define('PROXY_SIZE_LARGE', 'large');
-
-require_once 'include/security.php';
-
-function proxy_init(App $a) {
- // Pictures are stored in one of the following ways:
- // 1. If a folder "proxy" exists and is writeable, then use this for caching
- // 2. If a cache path is defined, use this
- // 3. If everything else failed, cache into the database
- //
- // Question: Do we really need these three methods?
-
- if (isset($_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 (function_exists('header_remove')) {
- header_remove('Pragma');
- header_remove('pragma');
- }
-
- $thumb = false;
- $size = 1024;
- $sizetype = '';
- $basepath = $a->get_basepath();
-
- // If the cache path isn't there, try to create it
- if (!is_dir($basepath . '/proxy') && is_writable($basepath)) {
- mkdir($basepath . '/proxy');
- }
-
- // Checking if caching into a folder in the webroot is activated and working
- $direct_cache = (is_dir($basepath . '/proxy') && is_writable($basepath . '/proxy'));
-
- // Look for filename in the arguments
- if ((isset($a->argv[1]) || isset($a->argv[2]) || isset($a->argv[3])) && !isset($_REQUEST['url'])) {
- if (isset($a->argv[3])) {
- $url = $a->argv[3];
- } elseif (isset($a->argv[2])) {
- $url = $a->argv[2];
- } else {
- $url = $a->argv[1];
- }
-
- if (isset($a->argv[3]) && ($a->argv[3] == 'thumb')) {
- $size = 200;
- }
-
- // thumb, small, medium and large.
- if (substr($url, -6) == ':micro') {
- $size = 48;
- $sizetype = ':micro';
- $url = substr($url, 0, -6);
- } elseif (substr($url, -6) == ':thumb') {
- $size = 80;
- $sizetype = ':thumb';
- $url = substr($url, 0, -6);
- } elseif (substr($url, -6) == ':small') {
- $size = 175;
- $url = substr($url, 0, -6);
- $sizetype = ':small';
- } elseif (substr($url, -7) == ':medium') {
- $size = 600;
- $url = substr($url, 0, -7);
- $sizetype = ':medium';
- } elseif (substr($url, -6) == ':large') {
- $size = 1024;
- $url = substr($url, 0, -6);
- $sizetype = ':large';
- }
-
- $pos = strrpos($url, '=.');
- if ($pos) {
- $url = substr($url, 0, $pos + 1);
- }
-
- $url = str_replace(['.jpg', '.jpeg', '.gif', '.png'], ['','','',''], $url);
-
- $url = base64_decode(strtr($url, '-_', '+/'), true);
-
- if ($url) {
- $_REQUEST['url'] = $url;
- }
- } else {
- $direct_cache = false;
- }
-
- if (!$direct_cache) {
- $urlhash = 'pic:' . sha1($_REQUEST['url']);
-
- $cachefile = get_cachefile(hash('md5', $_REQUEST['url']));
- if ($cachefile != '' && 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');
-
- // reduce quality - if it isn't a GIF
- if ($mime != 'image/gif') {
- $Image = new Image($img_str, $mime);
- if ($Image->isValid()) {
- $img_str = $Image->asString();
- }
- }
-
- echo $img_str;
- killme();
- }
- } else {
- $cachefile = '';
- }
-
- $valid = true;
- $photo = null;
- if (!$direct_cache && ($cachefile == '')) {
- $photo = DBA::selectFirst('photo', ['data', 'desc'], ['resource-id' => $urlhash]);
- if (DBA::isResult($photo)) {
- $img_str = $photo['data'];
- $mime = $photo['desc'];
- if ($mime == '') {
- $mime = 'image/jpeg';
- }
- }
- }
-
- if (!DBA::isResult($photo)) {
- // It shouldn't happen but it does - spaces in URL
- $_REQUEST['url'] = str_replace(' ', '+', $_REQUEST['url']);
- $redirects = 0;
- $img_str = Network::fetchUrl($_REQUEST['url'], true, $redirects, 10);
-
- $tempfile = tempnam(get_temppath(), 'cache');
- file_put_contents($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') || (!$img_str)) {
- $img_str = file_get_contents('images/blank.png');
- $mime = 'image/png';
- $cachefile = ''; // Clear the cachefile so that the dummy isn't stored
- $valid = false;
- $Image = new Image($img_str, 'image/png');
- if ($Image->isValid()) {
- $Image->scaleDown(10);
- $img_str = $Image->asString();
- }
- } elseif ($mime != 'image/jpeg' && !$direct_cache && $cachefile == '') {
- $image = @imagecreatefromstring($img_str);
-
- if ($image === FALSE) {
- die();
- }
-
- $fields = ['uid' => 0, 'contact-id' => 0, 'guid' => System::createGUID(), 'resource-id' => $urlhash, 'created' => DateTimeFormat::utcNow(), 'edited' => DateTimeFormat::utcNow(),
- 'filename' => basename($_REQUEST['url']), 'type' => '', 'album' => '', 'height' => imagesy($image), 'width' => imagesx($image),
- 'datasize' => 0, 'data' => $img_str, 'scale' => 100, 'profile' => 0,
- 'allow_cid' => '', 'allow_gid' => '', 'deny_cid' => '', 'deny_gid' => '', 'desc' => $mime];
- DBA::insert('photo', $fields);
- } else {
- $Image = new Image($img_str, $mime);
- if ($Image->isValid() && !$direct_cache && ($cachefile == '')) {
- Photo::store($Image, 0, 0, $urlhash, $_REQUEST['url'], '', 100);
- }
- }
- }
-
- $img_str_orig = $img_str;
-
- // reduce quality - if it isn't a GIF
- if ($mime != 'image/gif') {
- $Image = new Image($img_str, $mime);
- if ($Image->isValid()) {
- $Image->scaleDown($size);
- $img_str = $Image->asString();
- }
- }
-
- // If there is a real existing directory then put the cache file there
- // advantage: real file access is really fast
- // Otherwise write in cachefile
- if ($valid && $direct_cache) {
- file_put_contents($basepath . '/proxy/' . proxy_url($_REQUEST['url'], true), $img_str_orig);
- if ($sizetype != '') {
- file_put_contents($basepath . '/proxy/' . proxy_url($_REQUEST['url'], true) . $sizetype, $img_str);
- }
- } elseif ($cachefile != '') {
- file_put_contents($cachefile, $img_str_orig);
- }
-
- header('Content-type: ' . $mime);
-
- // Only output the cache headers when the file is valid
- if ($valid) {
- 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;
-
- killme();
-}
-
-/**
- * @brief Transform a remote URL into a local one
- *
- * This function only performs the URL replacement on http URL and if the
- * provided URL isn't local, "the isn't deactivated" (sic) and if the config
- * system.proxy_disabled is set to false.
- *
- * @param string $url The URL to proxyfy
- * @param bool $writemode Returns a local path the remote URL should be saved to
- * @param string $size One of the PROXY_SIZE_* constants
- *
- * @return string The proxyfied URL or relative path
- */
-function proxy_url($url, $writemode = false, $size = '') {
- $a = get_app();
-
- if (substr($url, 0, strlen('http')) !== 'http') {
- return $url;
- }
-
- // Only continue if it isn't a local image and the isn't deactivated
- if (proxy_is_local_image($url)) {
- $url = str_replace(normalise_link(System::baseUrl()) . '/', System::baseUrl() . '/', $url);
- return $url;
- }
-
- if (Config::get('system', 'proxy_disabled')) {
- return $url;
- }
-
- // Image URL may have encoded ampersands for display which aren't desirable for proxy
- $url = html_entity_decode($url, ENT_NOQUOTES, 'utf-8');
-
- // Creating a sub directory to reduce the amount of files in the cache directory
- $basepath = $a->get_basepath() . '/proxy';
-
- $shortpath = hash('md5', $url);
- $longpath = substr($shortpath, 0, 2);
-
- if (is_dir($basepath) && $writemode && !is_dir($basepath . '/' . $longpath)) {
- mkdir($basepath . '/' . $longpath);
- chmod($basepath . '/' . $longpath, 0777);
- }
-
- $longpath .= '/' . strtr(base64_encode($url), '+/', '-_');
-
- // Extract the URL extension
- $extension = pathinfo(parse_url($url, PHP_URL_PATH), PATHINFO_EXTENSION);
-
- $extensions = ['jpg', 'jpeg', 'gif', 'png'];
- if (in_array($extension, $extensions)) {
- $shortpath .= '.' . $extension;
- $longpath .= '.' . $extension;
- }
-
- $proxypath = System::baseUrl() . '/proxy/' . $longpath;
-
- if ($size != '') {
- $size = ':' . $size;
- }
-
- // Too long files aren't supported by Apache
- // Writemode in combination with long files shouldn't be possible
- if ((strlen($proxypath) > 250) && $writemode) {
- return $shortpath;
- } elseif (strlen($proxypath) > 250) {
- return System::baseUrl() . '/proxy/' . $shortpath . '?url=' . urlencode($url);
- } elseif ($writemode) {
- return $longpath;
- } else {
- return $proxypath . $size;
- }
-}
-
-/**
- * @param $url string
- * @return boolean
- */
-function proxy_is_local_image($url) {
- if ($url[0] == '/') {
- return true;
- }
-
- if (strtolower(substr($url, 0, 5)) == 'data:') {
- return true;
- }
-
- // links normalised - bug #431
- $baseurl = normalise_link(System::baseUrl());
- $url = normalise_link($url);
- return (substr($url, 0, strlen($baseurl)) == $baseurl);
-}
-
-/**
- * @brief Return the array of query string parameters from a URL
- *
- * @param string $url
- * @return array Associative array of query string parameters
- */
-function proxy_parse_query($url) {
- $query = parse_url($url, PHP_URL_QUERY);
- $query = html_entity_decode($query);
- $query_list = explode('&', $query);
- $arr = [];
-
- foreach ($query_list as $key_value) {
- $key_value_list = explode('=', $key_value);
- $arr[$key_value_list[0]] = $key_value_list[1];
- }
-
- unset($url, $query_list, $url);
- return $arr;
-}
-
-function proxy_img_cb($matches) {
- // if the picture seems to be from another picture cache then take the original source
- $queryvar = proxy_parse_query($matches[2]);
- if (($queryvar['url'] != '') && (substr($queryvar['url'], 0, 4) == 'http')) {
- $matches[2] = urldecode($queryvar['url']);
- }
-
- // following line changed per bug #431
- if (proxy_is_local_image($matches[2])) {
- return $matches[1] . $matches[2] . $matches[3];
- }
-
- return $matches[1] . proxy_url(htmlspecialchars_decode($matches[2])) . $matches[3];
-}
-
-function proxy_parse_html($html) {
- $html = str_replace(normalise_link(System::baseUrl()) . '/', System::baseUrl() . '/', $html);
-
- return preg_replace_callback('/(<img [^>]*src *= *["\'])([^"\']+)(["\'][^>]*>)/siU', 'proxy_img_cb', $html);
-}
projects / friendica.git / blobdiff