@Override
public void call() throws Exception {
WebSocketUpgradeHandler handler =
WebSocketUpgradeHandler.class.cast(future.getAsyncHandler());
Request request = future.getRequest();
HttpResponseStatus status =
new NettyResponseStatus(future.getUri(), config, response, channel);
HttpResponseHeaders responseHeaders = new NettyResponseHeaders(response.headers());
Realm realm = request.getRealm() != null ? request.getRealm() : config.getRealm();
if (exitAfterProcessingFilters(channel, future, handler, status, responseHeaders)) {
return;
}
future.setHttpHeaders(response.headers());
if (exitAfterHandlingRedirect(
channel, future, response, request, response.getStatus().code(), realm)) return;
boolean validStatus = response.getStatus().equals(SWITCHING_PROTOCOLS);
boolean validUpgrade = response.headers().get(HttpHeaders.Names.UPGRADE) != null;
String connection = response.headers().get(HttpHeaders.Names.CONNECTION);
if (connection == null)
connection =
response.headers().get(HttpHeaders.Names.CONNECTION.toLowerCase(Locale.ENGLISH));
boolean validConnection = HttpHeaders.Values.UPGRADE.equalsIgnoreCase(connection);
boolean statusReceived = handler.onStatusReceived(status) == State.UPGRADE;
if (!statusReceived) {
try {
handler.onCompleted();
} finally {
future.done();
}
return;
}
final boolean headerOK = handler.onHeadersReceived(responseHeaders) == State.CONTINUE;
if (!headerOK || !validStatus || !validUpgrade || !validConnection) {
requestSender.abort(channel, future, new IOException("Invalid handshake response"));
return;
}
String accept = response.headers().get(HttpHeaders.Names.SEC_WEBSOCKET_ACCEPT);
String key =
getAcceptKey(
future
.getNettyRequest()
.getHttpRequest()
.headers()
.get(HttpHeaders.Names.SEC_WEBSOCKET_KEY));
if (accept == null || !accept.equals(key)) {
requestSender.abort(
channel,
future,
new IOException(
String.format("Invalid challenge. Actual: %s. Expected: %s", accept, key)));
}
channelManager.upgradePipelineForWebSockets(channel.pipeline());
invokeOnSucces(channel, handler);
future.done();
// set back the future so the protocol gets notified of frames
Channels.setAttribute(channel, future);
}
