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git.wh0rd.org - tt-rss.git/blob - plugins/af_zz_imgproxy/init.php
c3b3f7fd55247f37e80af4a8e0dc6d7471d68ea9
2 class Af_Zz_ImgProxy
extends Plugin
{
7 "Load insecure images via built-in proxy",
11 private $ssl_known_whitelist = "imgur.com gfycat.com i.reddituploads.com pbs.twimg.com i.redd.it i.sli.mg media.tumblr.com";
13 function is_public_method($method) {
14 return $method === "imgproxy";
17 function init($host) {
20 $host->add_hook($host::HOOK_RENDER_ARTICLE
, $this);
21 $host->add_hook($host::HOOK_RENDER_ARTICLE_CDM
, $this);
22 $host->add_hook($host::HOOK_ENCLOSURE_ENTRY
, $this);
24 $host->add_hook($host::HOOK_PREFS_TAB
, $this);
27 function hook_enclosure_entry($enc) {
28 if (preg_match("/image/", $enc["content_type"])) {
29 $proxy_all = $this->host
->get($this, "proxy_all");
31 $enc["content_url"] = $this->rewrite_url_if_needed($enc["content_url"], $proxy_all);
37 function hook_render_article($article) {
38 return $this->hook_render_article_cdm($article);
41 public function imgproxy() {
43 $url = rewrite_relative_url(get_self_url_prefix(), $_REQUEST["url"]);
45 // called without user context, let's just redirect to original URL
46 if (!$_SESSION["uid"]) {
47 header("Location: $url");
51 $local_filename = CACHE_DIR
. "/images/" . sha1($url);
53 if ($_REQUEST["debug"] == "1") { print $url . "\n" . $local_filename; die; }
55 header("Content-Disposition: inline; filename=\"".basename($local_filename)."\"");
57 if (file_exists($local_filename)) {
58 $mimetype = mime_content_type($local_filename);
59 header("Content-type: $mimetype");
61 $stamp = gmdate("D, d M Y H:i:s", filemtime($local_filename)). " GMT";
62 header("Last-Modified: $stamp", true);
64 readfile($local_filename);
66 $data = fetch_file_contents(array("url" => $url));
70 $disable_cache = $this->host
->get($this, "disable_cache");
72 if (!$disable_cache && strlen($data) > MIN_CACHE_FILE_SIZE
) {
73 if (file_put_contents($local_filename, $data)) {
74 $mimetype = mime_content_type($local_filename);
75 header("Content-type: $mimetype");
81 global $fetch_last_error;
82 global $fetch_last_error_code;
83 global $fetch_last_error_content;
85 if (function_exists("imagecreate") && !isset($_REQUEST["text"])) {
86 $img = imagecreate(450, 75);
88 /*$bg =*/ imagecolorallocate($img, 255, 255, 255);
89 $textcolor = imagecolorallocate($img, 255, 0, 0);
91 imagerectangle($img, 0, 0, 450-1, 75-1, $textcolor);
93 imagestring($img, 5, 5, 5, "Proxy request failed", $textcolor);
94 imagestring($img, 5, 5, 30, truncate_middle($url, 46, "..."), $textcolor);
95 imagestring($img, 5, 5, 55, "HTTP Code: $fetch_last_error_code", $textcolor);
97 header("Content-type: image/png");
102 header("Content-type: text/html");
104 http_response_code(400);
106 print "<h1>Proxy request failed.</h1>";
107 print "<p>Fetch error $fetch_last_error ($fetch_last_error_code)</p>";
108 print "<p>URL: $url</p>";
109 print "<textarea cols='80' rows='25'>" . htmlspecialchars($fetch_last_error_content) . "</textarea>";
115 function rewrite_url_if_needed($url, $all_remote = false) {
116 $scheme = parse_url($url, PHP_URL_SCHEME
);
119 $host = parse_url($url, PHP_URL_HOST
);
120 $self_host = parse_url(get_self_url_prefix(), PHP_URL_HOST
);
122 $is_remote = $host != $self_host;
127 if (($scheme != 'https' && $scheme != "") ||
$is_remote) {
128 if (strpos($url, "data:") !== 0) {
129 $parts = parse_url($url);
131 foreach (explode(" " , $this->ssl_known_whitelist
) as $host) {
132 if (substr(strtolower($parts['host']), -strlen($host)) === strtolower($host)) {
133 $parts['scheme'] = 'https';
134 $url = build_url($parts);
135 if ($all_remote && $is_remote) {
143 return get_self_url_prefix() . "/public.php?op=pluginhandler&plugin=af_zz_imgproxy&pmethod=imgproxy&url=" .
152 * @SuppressWarnings(PHPMD.UnusedFormalParameter)
154 function hook_render_article_cdm($article, $api_mode = false) {
156 $need_saving = false;
157 $proxy_all = $this->host
->get($this, "proxy_all");
159 $doc = new DOMDocument();
160 if (@$doc->loadHTML($article["content"])) {
161 $xpath = new DOMXPath($doc);
162 $imgs = $xpath->query("//img[@src]");
164 foreach ($imgs as $img) {
165 $new_src = $this->rewrite_url_if_needed($img->getAttribute("src"), $proxy_all);
167 if ($new_src != $img->getAttribute("src")) {
168 $img->setAttribute("src", $new_src);
169 $img->removeAttribute("srcset");
175 $vids = $xpath->query("//video");
177 foreach ($vids as $vid) {
178 if ($vid->hasAttribute("poster")) {
179 $new_src = $this->rewrite_url_if_needed($vid->getAttribute("poster"), $proxy_all);
181 if ($new_src != $vid->getAttribute("poster")) {
182 $vid->setAttribute("poster", $new_src);
188 $vsrcs = $xpath->query("source", $vid);
190 foreach ($vsrcs as $vsrc) {
191 $new_src = $this->rewrite_url_if_needed($vsrc->getAttribute("src"), $proxy_all);
193 if ($new_src != $vsrc->getAttribute("src")) {
194 $vid->setAttribute("src", $new_src);
202 if ($need_saving) $article["content"] = $doc->saveXML();
207 function hook_prefs_tab($args) {
208 if ($args != "prefFeeds") return;
210 print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Image proxy settings (af_zz_imgproxy)')."\">";
212 print "<form dojoType=\"dijit.form.Form\">";
214 print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
215 evt.preventDefault();
216 if (this.validate()) {
217 console.log(dojo.objectToQuery(this.getValues()));
218 new Ajax.Request('backend.php', {
219 parameters: dojo.objectToQuery(this.getValues()),
220 onComplete: function(transport) {
221 notify_info(transport.responseText);
228 print_hidden("op", "pluginhandler");
229 print_hidden("method", "save");
230 print_hidden("plugin", "af_zz_imgproxy");
232 $proxy_all = $this->host
->get($this, "proxy_all");
233 print_checkbox("proxy_all", $proxy_all);
234 print " <label for=\"proxy_all\">" . __("Enable proxy for all remote images.") . "</label><br/>";
236 $disable_cache = $this->host
->get($this, "disable_cache");
237 print_checkbox("disable_cache", $disable_cache);
238 print " <label for=\"disable_cache\">" . __("Don't cache files locally.") . "</label>";
240 print "<p>"; print_button("submit", __("Save"));
248 $proxy_all = checkbox_to_sql_bool($_POST["proxy_all"]) == "true";
249 $disable_cache = checkbox_to_sql_bool($_POST["disable_cache"]) == "true";
251 $this->host
->set($this, "proxy_all", $proxy_all, false);
252 $this->host
->set($this, "disable_cache", $disable_cache);
254 echo __("Configuration saved");
257 function api_version() {