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- <?php
- class Af_Zz_ImgProxy extends Plugin {
- private $host;
- function about() {
- return array(1.0,
- "Load insecure images via built-in proxy",
- "fox");
- }
- function is_public_method($method) {
- return $method === "imgproxy";
- }
- function init($host) {
- $this->host = $host;
- $host->add_hook($host::HOOK_RENDER_ARTICLE, $this);
- $host->add_hook($host::HOOK_RENDER_ARTICLE_CDM, $this);
- $host->add_hook($host::HOOK_RENDER_ARTICLE_API, $this);
- $host->add_hook($host::HOOK_ENCLOSURE_ENTRY, $this);
- $host->add_hook($host::HOOK_PREFS_TAB, $this);
- }
- function hook_enclosure_entry($enc) {
- $proxy_all = $this->host->get($this, "proxy_all");
- $enc["url"] = $this->rewrite_url_if_needed($enc["url"], $proxy_all);
- return $enc;
- }
- function hook_render_article($article) {
- return $this->hook_render_article_cdm($article);
- }
- function hook_render_article_api($headline) {
- return $this->hook_render_article_cdm($headline["headline"], true);
- }
- public function imgproxy() {
- $url = rewrite_relative_url(SELF_URL_PATH, $_REQUEST["url"]);
- $kind = (int) $_REQUEST["kind"]; // 1 = video
- // called without user context, let's just redirect to original URL
- if (!$_SESSION["uid"]) {
- header("Location: $url");
- return;
- }
- $extension = $kind == 1 ? '.mp4' : '.png';
- $local_filename = CACHE_DIR . "/images/" . sha1($url) . $extension;
- if ($_REQUEST["debug"] == "1") { print $url . "\n" . $local_filename; die; }
- header("Content-Disposition: inline; filename=\"".basename($local_filename)."\"");
- if (file_exists($local_filename)) {
- $mimetype = mime_content_type($local_filename);
- header("Content-type: $mimetype");
- $stamp = gmdate("D, d M Y H:i:s", filemtime($local_filename)). " GMT";
- header("Last-Modified: $stamp", true);
- readfile($local_filename);
- } else {
- $data = fetch_file_contents(array("url" => $url));
- if ($data) {
- if (file_put_contents($local_filename, $data)) {
- $mimetype = mime_content_type($local_filename);
- header("Content-type: $mimetype");
- }
- print $data;
- }
- }
- }
- function rewrite_url_if_needed($url, $kind, $all_remote = false) {
- $scheme = parse_url($url, PHP_URL_SCHEME);
- if ($all_remote) {
- $host = parse_url($url, PHP_URL_HOST);
- $self_host = parse_url(SELF_URL_PATH, PHP_URL_HOST);
- $is_remote = $host != $self_host;
- } else {
- $is_remote = false;
- }
- if (($scheme != 'https' && $scheme != "") || $is_remote) {
- if (strpos($url, "data:") !== 0) {
- $url = "public.php?op=pluginhandler&plugin=af_zz_imgproxy&pmethod=imgproxy&kind=$kind&url=" .
- urlencode($url);
- }
- }
- 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($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"), 0, $proxy_all);
- if ($new_src != $img->getAttribute("src")) {
- $img->setAttribute("src", $new_src);
- $need_saving = true;
- }
- }
- $vids = $xpath->query("//video");
- foreach ($vids as $vid) {
- if ($vid->hasAttribute("poster")) {
- $new_src = $this->rewrite_url_if_needed($vid->getAttribute("poster"), 0, $proxy_all);
- if ($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"), 1, $proxy_all);
- if ($new_src != $vsrc->getAttribute("src")) {
- $vid->setAttribute("src", $new_src);
- $need_saving = true;
- }
- }
- }
- }
- if ($need_saving) $article["content"] = $doc->saveXML();
- return $article;
- }
- function hook_prefs_tab($args) {
- if ($args != "prefFeeds") return;
- print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Image proxy settings (af_zz_imgproxy)')."\">";
- print "<form dojoType=\"dijit.form.Form\">";
- print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
- evt.preventDefault();
- if (this.validate()) {
- console.log(dojo.objectToQuery(this.getValues()));
- new Ajax.Request('backend.php', {
- parameters: dojo.objectToQuery(this.getValues()),
- onComplete: function(transport) {
- notify_info(transport.responseText);
- }
- });
- //this.reset();
- }
- </script>";
- print_hidden("op", "pluginhandler");
- print_hidden("method", "save");
- print_hidden("plugin", "af_zz_imgproxy");
- $proxy_all = $this->host->get($this, "proxy_all");
- print_checkbox("proxy_all", $proxy_all);
- print " <label for=\"proxy_all\">" . __("Enable proxy for all remote images.") . "</label>";
- print "<p>"; print_button("submit", __("Save"));
- print "</form>";
- print "</div>";
- }
- function save() {
- $proxy_all = checkbox_to_sql_bool($_POST["proxy_all"]) == "true";
- $this->host->set($this, "proxy_all", $proxy_all);
- echo __("Configuration saved");
- }
- function api_version() {
- return 2;
- }
- }
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