public function handle($request, Closure $next)
{
$request->grip_timeout = null;
$request->grip_hold = null;
$request->grip_channels = null;
$request->grip_proxied = false;
$request->grip_wscontext = null;
$grip_signed = false;
$grip_proxies = array();
if (\Config::has('app.grip_proxies')) {
$grip_proxies = \Config::get('app.grip_proxies');
}
if (array_key_exists('grip-sig', \Request::header())) {
foreach ($grip_proxies as $entry) {
if (\GripControl\GripControl::validate_sig(\Request::header('grip-sig'), $entry['key'])) {
$grip_signed = true;
break;
}
}
}
$content_type = null;
if (array_key_exists('content-type', \Request::header())) {
$content_type = \Request::header('content-type');
$at = strpos($content_type, ';');
if ($at !== false) {
$content_type = substr($content_type, 0, $at);
}
}
$accept_types = null;
if (array_key_exists('accept', \Request::header())) {
$accept_types = \Request::header('accept');
$tmp = explode(',', $accept_types);
$accept_types = array();
foreach ($tmp as $accept_type) {
$accept_types[] = trim($accept_type);
}
}
$wscontext = null;
if ($request->isMethod('post') && ($content_type == 'application/websocket-events' || !is_null($accept_types) && in_array('application/websocket-events', $accept_types))) {
$cid = null;
if (array_key_exists('connection-id', \Request::header())) {
$cid = \Request::header('content-type');
}
$meta = array();
foreach (\Request::header() as $key => $value) {
if (strpos($key, 'meta') === 0) {
$meta[substr($key, 5)] = $value[0];
}
}
$events = null;
try {
$events = \GripControl\GripControl::decode_websocket_events($request->getContent());
} catch (\RuntimeException $e) {
return new \Illuminate\Http\Response("Error parsing WebSocket events.\n", 400);
}
$wscontext = new WebSocketContext($cid, $meta, $events);
}
$request->grip_proxied = $grip_signed;
$request->grip_wscontext = $wscontext;
try {
$response = $next($request);
} catch (NonWebSocketRequestException $e) {
return new \Illuminate\Http\Response($e->getMessage(), 400);
}
if (!is_null($request->grip_wscontext) && $response->getStatusCode() == 200) {
$wscontext = $request->grip_wscontext;
$meta_remove = array();
foreach ($wscontext->orig_meta as $key => $value) {
$found = false;
foreach ($wscontext->meta as $nkey => $nvalue) {
if (strtolower($nkey) == $key) {
$found = true;
break;
}
}
if (!$found) {
$meta_remove[] = $key;
}
}
$meta_remove = array_unique($meta_remove);
$meta_set = array();
foreach ($wscontext->meta as $key => $value) {
$lname = strtolower($key);
$need_set = true;
foreach ($wscontext->orig_meta as $okey => $ovalue) {
if ($lname == $okey && $value == $ovalue) {
$need_set = false;
break;
}
}
if ($need_set) {
$meta_set[$lname] = $value;
}
}
$events = array();
if ($wscontext->accepted) {
$events[] = new \GripControl\WebSocketEvent('OPEN');
}
$events = array_merge($events, $wscontext->out_events);
if ($wscontext->closed) {
$events[] = new \GripControl\WebSocketEvent('CLOSE', pack("n", $wscontext->out_close_code));
}
$response->setContent(\GripControl\GripControl::encode_websocket_events($events));
$response->header('Content-Type', 'application/websocket-events');
$response->header('Sec-WebSocket-Extensions', 'grip');
foreach ($meta_remove as $key) {
$response->header('Set-Meta-' . $key, '');
}
foreach ($meta_set as $key => $value) {
$response->header('Set-Meta-' . $key, $value);
}
} elseif (!is_null($request->grip_hold)) {
if (!$request->grip_proxied && \Config::has('app.grip_proxy_required') && \Config::get('app.grip_proxy_required')) {
return new \Illuminate\Http\Response('Not implemented.\\n', 501);
}
$channels = $request->grip_channels;
$prefix = get_prefix();
if ($prefix != '') {
foreach ($channels as $channel) {
$channel->name += $prefix;
}
}
if ($response->getStatusCode() == 304) {
$iheaders = array();
foreach ($response->headers->all() as $key => $value) {
$iheaders[$key] = $value[0];
}
$iresponse = new \GripControl\Response($response->getStatusCode(), null, $iheaders, $response->getContent());
$response->setContent(\GripControl\GripControl::create_hold($request->grip_hold, $channels, $iresponse, $request->grip_timeout));
$response->headers->replace(array('Content-Type' => 'application/grip-instruct'));
$response->setStatusCode(200);
} else {
$response->header('Grip-Hold', $request->grip_hold);
$response->header('Grip-Channel', \GripControl\GripControl::create_grip_channel_header($channels));
if (!is_null($request->grip_timeout)) {
$response->header('Grip-Timeout', $request->grip_timeout);
}
}
}
return $response;
}
