374 lines
11 KiB
PHP
374 lines
11 KiB
PHP
<?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\DBM;
|
|
use Friendica\Model\Photo;
|
|
use Friendica\Object\Image;
|
|
|
|
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(array('.jpg', '.jpeg', '.gif', '.png'), array('','','',''), $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;
|
|
$r = array();
|
|
|
|
if (!$direct_cache && ($cachefile == '')) {
|
|
$r = dba::selectOne('photo', ['data', 'desc'], ['resource-id' => $urlhash]);
|
|
if (DBM::is_result($r)) {
|
|
$img_str = $r['data'];
|
|
$mime = $r['desc'];
|
|
if ($mime == '') {
|
|
$mime = 'image/jpeg';
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!DBM::is_result($r)) {
|
|
// It shouldn't happen but it does - spaces in URL
|
|
$_REQUEST['url'] = str_replace(' ', '+', $_REQUEST['url']);
|
|
$redirects = 0;
|
|
$img_str = fetch_url($_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 = array('uid' => 0, 'contact-id' => 0, 'guid' => get_guid(), 'resource-id' => $urlhash, 'created' => datetime_convert(), 'edited' => datetime_convert(),
|
|
'filename' => basename($_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);
|
|
|
|
$extensions = array('jpg', 'jpeg', 'gif', 'png');
|
|
if (in_array($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);
|
|
$arr = array();
|
|
|
|
foreach ($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);
|
|
}
|