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friendica
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Simplified proxy handling

This commit is contained in:
Michael 2021-07-04 21:24:49 +00:00
parent dfc1b1e7a5
commit e519b782fd
6 changed files with 30 additions and 196 deletions
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6
include/api.php
View File

@ -2678,7 +2678,7 @@ function api_get_attachments(&$body)
if (DI::config()->get("system", "proxy_disabled")) {
$attachments[] = ["url" => $image, "mimetype" => $imagedata["mime"], "size" => $imagedata["size"]];
} else {
$attachments[] = ["url" => ProxyUtils::proxifyUrl($image, false), "mimetype" => $imagedata["mime"], "size" => $imagedata["size"]];
$attachments[] = ["url" => ProxyUtils::proxifyUrl($image), "mimetype" => $imagedata["mime"], "size" => $imagedata["size"]];
}
}
}
@ -2703,7 +2703,7 @@ function api_get_entitities(&$text, $bbcode)
preg_match_all("/\[img](.*?)\[\/img\]/ism", $bbcode, $images);
foreach ($images[1] as $image) {
$replace = ProxyUtils::proxifyUrl($image, false);
$replace = ProxyUtils::proxifyUrl($image);
$text = str_replace($image, $replace, $text);
}
return [];
@ -2818,7 +2818,7 @@ function api_get_entitities(&$text, $bbcode)
// If image cache is activated, then use the following sizes:
// thumb (150), small (340), medium (600) and large (1024)
if (!DI::config()->get("system", "proxy_disabled")) {
$media_url = ProxyUtils::proxifyUrl($url, false);
$media_url = ProxyUtils::proxifyUrl($url);
$sizes = [];
$scale = Images::getScalingDimensions($image[0], $image[1], 150);

2
src/Content/Text/BBCode.php
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@ -1012,7 +1012,7 @@ class BBCode
if (!empty($author_contact['id'])) {
$attributes['avatar'] = Contact::getAvatarUrlForId($author_contact['id'], ProxyUtils::SIZE_THUMB);
} elseif ($attributes['avatar']) {
$attributes['avatar'] = ProxyUtils::proxifyUrl($attributes['avatar'], false, ProxyUtils::SIZE_THUMB);
$attributes['avatar'] = ProxyUtils::proxifyUrl($attributes['avatar'], ProxyUtils::SIZE_THUMB);
}
$content = preg_replace(Strings::autoLinkRegEx(), '<a href="$1">$1</a>', $match[3]);

2
src/Model/Contact.php
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@ -1517,7 +1517,7 @@ class Contact
if (Proxy::isLocalImage($avatar)) {
return $avatar;
} else {
return Proxy::proxifyUrl($avatar, false, $size);
return Proxy::proxifyUrl($avatar, $size);
}
}

196
src/Module/Proxy.php
View File

@ -24,10 +24,9 @@ namespace Friendica\Module;
use Friendica\BaseModule;
use Friendica\Core\Logger;
use Friendica\Core\System;
use Friendica\DI;
use Friendica\Model\Photo;
use Friendica\Object\Image;
use Friendica\Util\HTTPSignature;
use Friendica\Util\Images;
use Friendica\Util\Proxy as ProxyUtils;
/**
@ -48,43 +47,23 @@ class Proxy extends BaseModule
*/
public static function rawContent(array $parameters = [])
{
// Set application instance here
$a = DI::app();
/*
* Pictures are stored in one of the following ways:
*
* 1. If a folder "proxy" exists and is writeable, then use this for caching
* 2. If a cache path is defined, use this
* 3. If everything else failed, cache into the database
*
* Question: Do we really need these three methods?
*/
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
header('HTTP/1.1 304 Not Modified');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
header('Etag: ' . $_SERVER['HTTP_IF_NONE_MATCH']);
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + (31536000)) . ' GMT');
header('Cache-Control: max-age=31536000');
if (function_exists('header_remove')) {
header_remove('Last-Modified');
header_remove('Expires');
header_remove('Cache-Control');
if (isset($_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");
if (!empty($_SERVER["HTTP_IF_NONE_MATCH"])) {
header("Etag: " . $_SERVER["HTTP_IF_NONE_MATCH"]);
}
/// @TODO Stop here?
exit();
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');
}
$direct_cache = self::setupDirectCache();
$request = self::getRequestInfo();
$request = self::getRequestInfo($parameters);
if (empty($request['url'])) {
throw new \Friendica\Network\HTTPException\BadRequestException();
@ -95,35 +74,21 @@ class Proxy extends BaseModule
System::externalRedirect($request['url']);
}
// Webserver already tried direct cache...
// Try to use filecache;
$cachefile = self::responseFromCache($request);
// Try to use photo from db
self::responseFromDB($request);
//
// If script is here, the requested url has never cached before.
// Let's fetch it, scale it if required, then save it in cache.
//
// It shouldn't happen but it does - spaces in URL
$request['url'] = str_replace(' ', '+', $request['url']);
// Fetch the content with the local user
$fetchResult = HTTPSignature::fetchRaw($request['url'], local_user(), ['timeout' => 10]);
$img_str = $fetchResult->getBody();
// If there is an error then return a blank image
// If there is an error then return an error
if ((substr($fetchResult->getReturnCode(), 0, 1) == '4') || empty($img_str)) {
Logger::info('Error fetching image', ['image' => $request['url'], 'return' => $fetchResult->getReturnCode(), 'empty' => empty($img_str)]);
self::responseError();
// stop.
}
$tempfile = tempnam(get_temppath(), 'cache');
file_put_contents($tempfile, $img_str);
$mime = mime_content_type($tempfile);
unlink($tempfile);
$mime = Images::getMimeTypeByData($img_str);
$image = new Image($img_str, $mime);
if (!$image->isValid()) {
@ -132,80 +97,33 @@ class Proxy extends BaseModule
// stop.
}
$basepath = $a->getBasePath();
$filepermission = DI::config()->get('system', 'proxy_file_chmod');
// Store original image
if ($direct_cache) {
// direct cache , store under ./proxy/
$filename = $basepath . '/proxy/' . ProxyUtils::proxifyUrl($request['url'], true);
file_put_contents($filename, $image->asString());
if (!empty($filepermission)) {
chmod($filename, $filepermission);
}
} elseif($cachefile !== '') {
// cache file
file_put_contents($cachefile, $image->asString());
} else {
// database
Photo::store($image, 0, 0, $request['urlhash'], $request['url'], '', 100);
}
// reduce quality - if it isn't a GIF
if ($image->getType() != 'image/gif') {
$image->scaleDown($request['size']);
}
// Store scaled image
if ($direct_cache && $request['sizetype'] != '') {
$filename = $basepath . '/proxy/' . ProxyUtils::proxifyUrl($request['url'], true) . $request['sizetype'];
file_put_contents($filename, $image->asString());
if (!empty($filepermission)) {
chmod($filename, $filepermission);
}
}
self::responseImageHttpCache($image);
// stop.
}
/**
* Build info about requested image to be proxied
*
* @return array
* [
* 'url' => requested url,
* 'urlhash' => sha1 has of the url prefixed with 'pic:',
* 'size' => requested image size (int)
* 'sizetype' => requested image size (string): ':micro', ':thumb', ':small', ':medium', ':large'
* ]
* @throws \Exception
*/
private static function getRequestInfo()
private static function getRequestInfo(array $parameters)
{
$a = DI::app();
$size = ProxyUtils::PIXEL_LARGE;
$sizetype = '';
// Look for filename in the arguments
// @TODO: Replace with parameter from router
if (($a->argc > 1) && !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];
}
/// @TODO: Why? And what about $url in this case?
/// @TODO: Replace with parameter from router
if (isset($a->argv[3]) && ($a->argv[3] == 'thumb')) {
$size = 200;
}
if (!empty($parameters['url']) && empty($_REQUEST['url'])) {
$url = $parameters['url'];
// thumb, small, medium and large.
if (substr($url, -6) == ':micro') {
@ -238,87 +156,17 @@ class Proxy extends BaseModule
$url = str_replace(['.jpg', '.jpeg', '.gif', '.png'], ['','','',''], $url);
$url = base64_decode(strtr($url, '-_', '+/'), true);
} else {
$url = $_REQUEST['url'] ?? '';
}
return [
'url' => $url,
'urlhash' => 'pic:' . sha1($url),
'size' => $size,
'sizetype' => $sizetype,
];
}
/**
* setup ./proxy folder for direct cache
*
* @return bool False if direct cache can't be used.
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
private static function setupDirectCache()
{
$a = DI::app();
$basepath = $a->getBasePath();
// If the cache path isn't there, try to create it
if (!is_dir($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'));
// we don't use direct cache if image url is passed in args and not in querystring
$direct_cache = $direct_cache && ($a->argc > 1) && !isset($_REQUEST['url']);
return $direct_cache;
}
/**
* Try to reply with image in cachefile
*
* @param array $request Array from getRequestInfo
*
* @return string Cache file name, empty string if cache is not enabled.
*
* If cachefile exists, script ends here and this function will never returns
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function responseFromCache(&$request)
{
$cachefile = get_cachefile(hash('md5', $request['url']));
if ($cachefile != '' && file_exists($cachefile)) {
$img = new Image(file_get_contents($cachefile), mime_content_type($cachefile));
self::responseImageHttpCache($img);
// stop.
}
return $cachefile;
}
/**
* Try to reply with image in database
*
* @param array $request Array from getRequestInfo
*
* If the image exists in database, then script ends here and this function will never returns
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
* @throws \ImagickException
*/
private static function responseFromDB(&$request)
{
$photo = Photo::getPhoto($request['urlhash']);
if ($photo !== false) {
$img = Photo::getImageForPhoto($photo);
self::responseImageHttpCache($img);
// stop.
}
}
/**
* In case of an error just stop. We don't return content to avoid caching problems
*

2
src/Protocol/OStatus.php
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@ -1207,7 +1207,7 @@ class OStatus
}
// Is it a remote picture? Then make a smaller preview here
$preview = ProxyUtils::proxifyUrl($preview, false, ProxyUtils::SIZE_SMALL);
$preview = ProxyUtils::proxifyUrl($preview, ProxyUtils::SIZE_SMALL);
// Is it a local picture? Then make it smaller here
$preview = str_replace(["-0.jpg", "-0.png"], ["-2.jpg", "-2.png"], $preview);

18
src/Util/Proxy.php
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@ -80,13 +80,12 @@ class Proxy
* 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 $size One of the ProxyUtils::SIZE_* constants
*
* @return string The proxyfied URL or relative path
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function proxifyUrl($url, $writemode = false, $size = '')
public static function proxifyUrl($url, $size = '')
{
// Get application instance
$a = DI::app();
@ -114,17 +113,9 @@ class Proxy
// 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->getBasePath() . '/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
@ -142,13 +133,8 @@ class Proxy
}
// 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) {
if (strlen($proxypath) > 250) {
return DI::baseUrl() . '/proxy/' . $shortpath . '?url=' . urlencode($url);
} elseif ($writemode) {
return $longpath;
} else {
return $proxypath . $size;
}