257 lines
6.6 KiB
PHP
257 lines
6.6 KiB
PHP
<?php
|
|
class Af_Proxy_Http extends Plugin {
|
|
|
|
/* @var PluginHost $host */
|
|
private $host;
|
|
|
|
/* @var DiskCache $cache */
|
|
private $cache;
|
|
|
|
function about() {
|
|
return array(1.0,
|
|
"Loads media served over plain HTTP via built-in secure proxy",
|
|
"fox");
|
|
}
|
|
|
|
private $ssl_known_whitelist = "imgur.com gfycat.com i.reddituploads.com pbs.twimg.com i.redd.it i.sli.mg media.tumblr.com";
|
|
|
|
function is_public_method($method) {
|
|
return $method === "imgproxy";
|
|
}
|
|
|
|
function init($host) {
|
|
$this->host = $host;
|
|
$this->cache = new DiskCache("images");
|
|
|
|
$host->add_hook($host::HOOK_RENDER_ARTICLE, $this, 150);
|
|
$host->add_hook($host::HOOK_RENDER_ARTICLE_CDM, $this, 150);
|
|
$host->add_hook($host::HOOK_ENCLOSURE_ENTRY, $this);
|
|
|
|
$host->add_hook($host::HOOK_PREFS_TAB, $this);
|
|
|
|
if (empty($_SESSION['af_proxy_http_token']))
|
|
$_SESSION['af_proxy_http_token'] = bin2hex(get_random_bytes(16));
|
|
}
|
|
|
|
function hook_enclosure_entry($enc) {
|
|
if (preg_match("/image/", $enc["content_type"])) {
|
|
$proxy_all = $this->host->get($this, "proxy_all");
|
|
|
|
$enc["content_url"] = $this->rewrite_url_if_needed($enc["content_url"], $proxy_all);
|
|
}
|
|
|
|
return $enc;
|
|
}
|
|
|
|
function hook_render_article($article) {
|
|
return $this->hook_render_article_cdm($article);
|
|
}
|
|
|
|
public function imgproxy() {
|
|
$url = UrlHelper::validate(clean($_REQUEST["url"]));
|
|
|
|
// immediately redirect to original URL if:
|
|
// - url points back to ourselves
|
|
// - called without user context
|
|
// - session-spefific token is invalid
|
|
if (
|
|
strpos($url, get_self_url_prefix()) === 0 ||
|
|
empty($_SESSION["uid"]) ||
|
|
$_REQUEST['af_proxy_http_token'] != $_SESSION['af_proxy_http_token']) {
|
|
header("Location: $url");
|
|
return;
|
|
}
|
|
|
|
$local_filename = sha1($url);
|
|
|
|
if ($this->cache->exists($local_filename)) {
|
|
header("Location: " . $this->cache->get_url($local_filename));
|
|
return;
|
|
} else {
|
|
$data = UrlHelper::fetch(["url" => $url, "max_size" => MAX_CACHE_FILE_SIZE]);
|
|
|
|
if ($data) {
|
|
if ($this->cache->put($local_filename, $data)) {
|
|
header("Location: " . $this->cache->get_url($local_filename));
|
|
return;
|
|
}
|
|
} else {
|
|
global $fetch_last_error;
|
|
global $fetch_last_error_code;
|
|
global $fetch_last_error_content;
|
|
|
|
if (function_exists("imagecreate") && !isset($_REQUEST["text"])) {
|
|
$img = imagecreate(450, 75);
|
|
|
|
/*$bg =*/ imagecolorallocate($img, 255, 255, 255);
|
|
$textcolor = imagecolorallocate($img, 255, 0, 0);
|
|
|
|
imagerectangle($img, 0, 0, 450-1, 75-1, $textcolor);
|
|
|
|
imagestring($img, 5, 5, 5, "Proxy request failed", $textcolor);
|
|
imagestring($img, 5, 5, 30, truncate_middle($url, 46, "..."), $textcolor);
|
|
imagestring($img, 5, 5, 55, "HTTP Code: $fetch_last_error_code", $textcolor);
|
|
|
|
header("Content-type: image/png");
|
|
print imagepng($img);
|
|
imagedestroy($img);
|
|
|
|
} else {
|
|
header("Content-type: text/plain");
|
|
|
|
http_response_code(400);
|
|
|
|
print "Proxy request failed.\n".
|
|
"Fetch error $fetch_last_error ($fetch_last_error_code)\n".
|
|
"Requested URL: $url";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private function rewrite_url_if_needed($url, $all_remote = false) {
|
|
/* don't rewrite urls pointing to ourselves */
|
|
|
|
if (strpos($url, get_self_url_prefix()) === 0)
|
|
return $url;
|
|
|
|
/* we don't need to handle URLs where local cache already exists, tt-rss rewrites those automatically */
|
|
if (!$this->cache->exists(sha1($url))) {
|
|
|
|
$scheme = parse_url($url, PHP_URL_SCHEME);
|
|
|
|
if ($all_remote) {
|
|
$host = parse_url($url, PHP_URL_HOST);
|
|
$self_host = parse_url(get_self_url_prefix(), PHP_URL_HOST);
|
|
|
|
$is_remote = $host != $self_host;
|
|
} else {
|
|
$is_remote = false;
|
|
}
|
|
|
|
if (($scheme != 'https' && $scheme != "") || $is_remote) {
|
|
if (strpos($url, "data:") !== 0) {
|
|
$parts = parse_url($url);
|
|
|
|
foreach (explode(" " , $this->ssl_known_whitelist) as $host) {
|
|
if (substr(strtolower($parts['host']), -strlen($host)) === strtolower($host)) {
|
|
$parts['scheme'] = 'https';
|
|
$url = UrlHelper::build_url($parts);
|
|
if ($all_remote && $is_remote) {
|
|
break;
|
|
} else {
|
|
return $url;
|
|
}
|
|
}
|
|
}
|
|
|
|
return $this->host->get_public_method_url($this, "imgproxy",
|
|
["url" => $url, "af_proxy_http_token" => $_SESSION["af_proxy_http_token"]]);
|
|
}
|
|
}
|
|
}
|
|
|
|
return $url;
|
|
}
|
|
|
|
function hook_render_article_cdm($article, $api_mode = false) {
|
|
|
|
$need_saving = false;
|
|
$proxy_all = $this->host->get($this, "proxy_all");
|
|
|
|
$doc = new DOMDocument();
|
|
if (@$doc->loadHTML('<?xml encoding="UTF-8">' . $article["content"])) {
|
|
$xpath = new DOMXPath($doc);
|
|
$imgs = $xpath->query("//img[@src]");
|
|
|
|
foreach ($imgs as $img) {
|
|
$new_src = $this->rewrite_url_if_needed($img->getAttribute("src"), $proxy_all);
|
|
|
|
if ($new_src != $img->getAttribute("src")) {
|
|
$img->setAttribute("src", $new_src);
|
|
$img->removeAttribute("srcset");
|
|
|
|
$need_saving = true;
|
|
}
|
|
}
|
|
|
|
$vids = $xpath->query("(//video|//picture)");
|
|
|
|
foreach ($vids as $vid) {
|
|
if ($vid->hasAttribute("poster")) {
|
|
$new_src = $this->rewrite_url_if_needed($vid->getAttribute("poster"), $proxy_all);
|
|
|
|
if ($new_src != $vid->getAttribute("poster")) {
|
|
$vid->setAttribute("poster", $new_src);
|
|
|
|
$need_saving = true;
|
|
}
|
|
}
|
|
|
|
$vsrcs = $xpath->query("source", $vid);
|
|
|
|
foreach ($vsrcs as $vsrc) {
|
|
$new_src = $this->rewrite_url_if_needed($vsrc->getAttribute("src"), $proxy_all);
|
|
|
|
if ($new_src != $vsrc->getAttribute("src")) {
|
|
$vid->setAttribute("src", $new_src);
|
|
|
|
$need_saving = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ($need_saving) $article["content"] = $doc->saveHTML();
|
|
|
|
return $article;
|
|
}
|
|
|
|
function hook_prefs_tab($args) {
|
|
if ($args != "prefFeeds") return;
|
|
?>
|
|
|
|
<div dojoType="dijit.layout.AccordionPane"
|
|
title="<i class='material-icons'>extension</i> <?= __('Image proxy settings (af_proxy_http)') ?>">
|
|
|
|
<form dojoType="dijit.form.Form">
|
|
|
|
<?= \Controls\pluginhandler_tags($this, "save") ?>
|
|
|
|
<script type="dojo/method" event="onSubmit" args="evt">
|
|
evt.preventDefault();
|
|
if (this.validate()) {
|
|
xhrPost("backend.php", this.getValues(), (transport) => {
|
|
Notify.info(transport.responseText);
|
|
})
|
|
}
|
|
</script>
|
|
|
|
<fieldset>
|
|
<label class="checkbox">
|
|
<?= \Controls\checkbox_tag("proxy_all", $this->host->get($this, "proxy_all")) ?>
|
|
<?= __("Enable proxy for all remote images.") ?>
|
|
</label>
|
|
</fieldset>
|
|
|
|
<hr/>
|
|
|
|
<?= \Controls\submit_tag(__("Save")) ?>
|
|
</form>
|
|
</div>
|
|
<?php
|
|
}
|
|
|
|
function save() {
|
|
$proxy_all = checkbox_to_sql_bool($_POST["proxy_all"] ?? "");
|
|
|
|
$this->host->set($this, "proxy_all", $proxy_all);
|
|
|
|
echo __("Configuration saved");
|
|
}
|
|
|
|
function api_version() {
|
|
return 2;
|
|
}
|
|
}
|