From de5669f723152bee265bcca7fb11557f75a2331c Mon Sep 17 00:00:00 2001 From: Andrew Dolgov Date: Thu, 15 Aug 2019 16:27:53 +0300 Subject: af_zz_imgproxy: rename to af_proxy_http, use priority hook loader --- plugins/af_proxy_http/init.php | 263 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 263 insertions(+) create mode 100644 plugins/af_proxy_http/init.php (limited to 'plugins/af_proxy_http') diff --git a/plugins/af_proxy_http/init.php b/plugins/af_proxy_http/init.php new file mode 100644 index 000000000..13e2eea23 --- /dev/null +++ b/plugins/af_proxy_http/init.php @@ -0,0 +1,263 @@ +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, $this); + } + + function hook_enclosure_entry($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 = rewrite_relative_url(get_self_url_prefix(), $_REQUEST["url"]); + + // called without user context, let's just redirect to original URL + if (!$_SESSION["uid"]) { + header("Location: $url"); + return; + } + + $local_filename = sha1($url); + + if ($this->cache->exists($local_filename)) { + header("Location: " . $this->cache->getUrl($local_filename)); + return; + //$this->cache->send($local_filename); + } else { + $data = fetch_file_contents(["url" => $url, "max_size" => MAX_CACHE_FILE_SIZE]); + + if ($data) { + + $disable_cache = $this->host->get($this, "disable_cache"); + + if (!$disable_cache) { + if ($this->cache->put($local_filename, $data)) { + header("Location: " . $this->cache->getUrl($local_filename)); + return; + } + } + + print $data; + } 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/html"); + + http_response_code(400); + + print "

Proxy request failed.

"; + print "

Fetch error $fetch_last_error ($fetch_last_error_code)

"; + print "

URL: $url

"; + print ""; + } + } + } + } + + private function rewrite_url_if_needed($url, $all_remote = false) { + /* we don't need to handle URLs where local cache already exists, tt-rss rewrites those automatically */ + if (!$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'; + $url = build_url($parts); + if ($all_remote && $is_remote) { + break; + } else { + return $url; + } + } + } + + return get_self_url_prefix() . "/public.php?op=pluginhandler&plugin=af_zz_imgproxy&pmethod=imgproxy&url=" . + urlencode($url); + } + } + } + + return $url; + } + + /** + * @SuppressWarnings(PHPMD.UnusedFormalParameter) + */ + function hook_render_article_cdm($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"), $proxy_all); + + if ($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; + + print "
extension ".__('Image proxy settings (af_zz_imgproxy)')."\">"; + + print "
"; + + print ""; + + 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 " 
"; + + $disable_cache = $this->host->get($this, "disable_cache"); + print_checkbox("disable_cache", $disable_cache); + print " "; + + print "

"; print_button("submit", __("Save")); + + print "

"; + + print "
"; + } + + function save() { + $proxy_all = checkbox_to_sql_bool($_POST["proxy_all"]); + $disable_cache = checkbox_to_sql_bool($_POST["disable_cache"]); + + $this->host->set($this, "proxy_all", $proxy_all, false); + $this->host->set($this, "disable_cache", $disable_cache); + + echo __("Configuration saved"); + } + + function api_version() { + return 2; + } +} -- cgit v1.2.3