host = $host;
$host->add_hook($host::HOOK_RENDER_ARTICLE, $this);
$host->add_hook($host::HOOK_RENDER_ARTICLE_CDM, $this);
$host->add_hook($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(SELF_URL_PATH, $_REQUEST["url"]);
// called without user context, let's just redirect to original URL
if (!$_SESSION["uid"]) {
header("Location: $url");
return;
}
$local_filename = CACHE_DIR . "/images/" . sha1($url);
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;
} 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: $url
";
print "";
}
}
}
}
function rewrite_url_if_needed($url, $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) {
$parts = parse_url($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 $url;
}
function hook_render_article_cdm($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 = $xpath->query("//video");
foreach ($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->saveXML();
return $article;
}
function hook_prefs_tab($args) {
if ($args != "prefFeeds") return;
print "";
}
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;
}
}