function onHeadersReceived(ProxyEvent $event)
{
// so stupid... onCompleted won't be called on "streaming" responses
$response = $event['response'];
$request_url = $event['request']->getUri();
// proxify header location value
if ($response->headers->has('location')) {
$location = $response->headers->get('location');
// just in case this is a relative url like: /en
$response->headers->set('location', proxify_url($location, $request_url));
}
$code = $response->getStatusCode();
$text = $response->getStatusText();
if ($code >= 400 && $code <= 600) {
throw new \Exception("Error accessing resource: {$code} - {$text}");
}
// we need content-encoding (in case server refuses to serve it in plain text)
$forward_headers = array('content-type', 'content-length', 'accept-ranges', 'content-range', 'content-disposition', 'location', 'set-cookie');
foreach ($response->headers->all() as $name => $value) {
// is this one of the headers we wish to forward back to the client?
if (!in_array($name, $forward_headers)) {
$response->headers->remove($name);
}
}
// do not ever cache our proxy pages!
$response->headers->set("cache-control", "no-cache, no-store, must-revalidate");
$response->headers->set("pragma", "no-cache");
$response->headers->set("expires", 0);
}
private function form_action($matches)
{
// $matches[1] holds single or double quote - whichever was used by webmaster
// $matches[2] holds form submit URL - can be empty which in that case should be replaced with current URL
if (!$matches[2]) {
$matches[2] = $this->base_url;
}
$new_action = proxify_url($matches[2], $this->base_url);
// what is form method?
$form_post = preg_match('@method=(["\'])post\\1@i', $matches[0]) == 1;
// take entire form string - find real url and replace it with proxified url
$result = str_replace($matches[2], $new_action, $matches[0]);
// must be converted to POST otherwise GET form would just start appending name=value pairs to your proxy url
if (!$form_post) {
// may throw Duplicate Attribute warning but only first method matters
$result = str_replace("<form", '<form method="POST"', $result);
// got the idea from Glype - insert this input field to notify proxy later that this form must be converted to GET during http
$result .= '<input type="hidden" name="convertGET" value="1">';
}
return $result;
}
private function img_sprite($matches)
{
return str_replace($matches[1], proxify_url($matches[1], $matches[1]), $matches[0]);
}
// how are our URLs be generated from this point? this must be set here so the proxify_url function below can make use of it
if (Config::get('url_mode') == 1) {
Config::set('encryption_key', md5(Config::get('app_key') . $_SERVER['REMOTE_ADDR']));
} else {
if (Config::get('url_mode') == 2) {
Config::set('encryption_key', md5(Config::get('app_key') . session_id()));
}
}
// very important!!! otherwise requests are queued while waiting for session file to be unlocked
session_write_close();
// form submit in progress...
if (isset($_POST['url'])) {
$url = $_POST['url'];
$url = add_http($url);
header("HTTP/1.1 302 Found");
header('Location: ' . proxify_url($url));
exit;
} else {
if (!isset($_GET['q'])) {
// must be at homepage - should we redirect somewhere else?
if (Config::get('index_redirect')) {
// redirect to...
header("HTTP/1.1 302 Found");
header("Location: " . Config::get('index_redirect'));
} else {
echo render_template("./templates/main.php", array('version' => Proxy::VERSION));
}
exit;
}
}
// decode q parameter to get the real URL
function vid_player($url, $width, $height, $extension = false)
{
$path = parse_url($url, PHP_URL_PATH);
$html5 = false;
if ($path) {
$extension = $extension ? $extension : pathinfo($path, PATHINFO_EXTENSION);
if ($extension == 'mp4' || $extension == 'webm' || $extension == 'ogg') {
$html5 = true;
}
}
// this better be an absolute url
$video_url = proxify_url($url);
if ($html5) {
$html = '<video width="100%" height="100%" controls autoplay>
<source src="' . $video_url . '" type="video/' . $extension . '">
Your browser does not support the video tag.
</video>';
} else {
// encode before embedding it into player's parameters
$video_url = rawurlencode($video_url);
$html = '<object id="flowplayer" width="' . $width . '" height="' . $height . '" data="//releases.flowplayer.org/swf/flowplayer-3.2.18.swf" type="application/x-shockwave-flash">
<param name="allowfullscreen" value="true" />
<param name="wmode" value="transparent" />
<param name="flashvars" value=\'config={"clip":"' . $video_url . '", "plugins": {"controls": {"autoHide" : false} }}\' />
</object>';
}
return $html;
}
