128 lines
3.1 KiB
PHP
128 lines
3.1 KiB
PHP
<?php
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class Af_Zz_ImgProxy extends Plugin {
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private $host;
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function about() {
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return array(1.0,
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"Load insecure images via built-in proxy",
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"fox");
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}
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function flags() {
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return array("needs_curl" => true);
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}
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function init($host) {
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$this->host = $host;
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$host->add_hook($host::HOOK_RENDER_ARTICLE, $this);
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$host->add_hook($host::HOOK_RENDER_ARTICLE_CDM, $this);
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$host->add_hook($host::HOOK_RENDER_ARTICLE_API, $this);
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}
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function hook_render_article($article) {
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return $this->hook_render_article_cdm($article);
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}
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function hook_render_article_api($headline) {
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return $this->hook_render_article_cdm($headline["headline"], true);
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}
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public function imgproxy() {
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$url = rewrite_relative_url(SELF_URL_PATH, $_REQUEST["url"]);
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$kind = (int) $_REQUEST["kind"]; // 1 = video
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$extension = $kind == 1 ? '.mp4' : '.png';
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$local_filename = CACHE_DIR . "/images/" . sha1($url) . $extension;
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//if ($_REQUEST["debug"] == "1") { print $local_filename; die; }
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header("Content-Disposition: inline; filename=\"".basename($local_filename)."\"");
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if (file_exists($local_filename)) {
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$mimetype = mime_content_type($local_filename);
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header("Content-type: $mimetype");
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$stamp = gmdate("D, d M Y H:i:s", filemtime($local_filename)). " GMT";
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header("Last-Modified: $stamp", true);
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readfile($local_filename);
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} else {
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$data = fetch_file_contents(array("url" => $url));
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if ($data) {
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if (file_put_contents($local_filename, $data)) {
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$mimetype = mime_content_type($local_filename);
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header("Content-type: $mimetype");
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}
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print $data;
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}
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}
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}
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function rewrite_url_if_needed($url, $kind = 0) {
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$scheme = parse_url($url, PHP_URL_SCHEME);
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if ($scheme != 'https' && $scheme != "" && strpos($url, "data:") !== 0) {
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$url = "backend.php?op=pluginhandler&plugin=af_zz_imgproxy&method=imgproxy&kind=$kind&url=" .
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htmlspecialchars($url);
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}
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return $url;
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}
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function hook_render_article_cdm($article, $api_mode = false) {
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$need_saving = false;
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$doc = new DOMDocument();
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if (@$doc->loadHTML($article["content"])) {
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$xpath = new DOMXPath($doc);
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$imgs = $xpath->query("//img[@src]");
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foreach ($imgs as $img) {
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$new_src = $this->rewrite_url_if_needed($img->getAttribute("src"));
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if ($new_src != $img->getAttribute("src")) {
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$img->setAttribute("src", $new_src);
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$need_saving = true;
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}
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}
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$vids = $xpath->query("//video");
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foreach ($vids as $vid) {
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if ($vid->hasAttribute("poster")) {
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$new_src = $this->rewrite_url_if_needed($vid->getAttribute("poster"));
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if ($new_src != $vid->getAttribute("poster")) {
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$vid->setAttribute("poster", $new_src);
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$need_saving = true;
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}
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}
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$vsrcs = $xpath->query("source", $vid);
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foreach ($vsrcs as $vsrc) {
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$new_src = $this->rewrite_url_if_needed($vsrc->getAttribute("src"), 1);
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if ($new_src != $vsrc->getAttribute("src")) {
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$vid->setAttribute("src", $new_src);
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$need_saving = true;
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}
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}
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}
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}
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if ($need_saving) $article["content"] = $doc->saveXML();
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return $article;
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}
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function api_version() {
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return 2;
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}
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} |