@Override
public void handle(Channel channel, NettyResponseFuture<?> future, Object e) throws Exception {
if (e instanceof HttpResponse) {
HttpResponse response = (HttpResponse) e;
Channels.setAttribute(channel, new UpgradeCallback(future, channel, response));
} else if (e instanceof WebSocketFrame) {
final WebSocketFrame frame = (WebSocketFrame) e;
WebSocketUpgradeHandler handler =
WebSocketUpgradeHandler.class.cast(future.getAsyncHandler());
NettyWebSocket webSocket = NettyWebSocket.class.cast(handler.onCompleted());
invokeOnSucces(channel, handler);
if (webSocket != null) {
if (frame instanceof CloseWebSocketFrame) {
Channels.setDiscard(channel);
CloseWebSocketFrame closeFrame = CloseWebSocketFrame.class.cast(frame);
webSocket.onClose(closeFrame.statusCode(), closeFrame.reasonText());
} else {
ByteBuf buf = frame.content();
if (buf != null && buf.readableBytes() > 0) {
try {
NettyResponseBodyPart part =
nettyConfig
.getBodyPartFactory()
.newResponseBodyPart(buf, frame.isFinalFragment());
handler.onBodyPartReceived(part);
if (frame instanceof BinaryWebSocketFrame) {
webSocket.onBinaryFragment(part);
} else if (frame instanceof TextWebSocketFrame) {
webSocket.onTextFragment(part);
} else if (frame instanceof PingWebSocketFrame) {
webSocket.onPing(part);
} else if (frame instanceof PongWebSocketFrame) {
webSocket.onPong(part);
}
} finally {
buf.release();
}
}
}
} else {
logger.debug("UpgradeHandler returned a null NettyWebSocket ");
}
} else {
logger.error("Invalid message {}", e);
}
}
@Override
public void onClose(NettyResponseFuture<?> future) {
logger.trace("onClose");
try {
WebSocketUpgradeHandler h = (WebSocketUpgradeHandler) future.getAsyncHandler();
NettyWebSocket webSocket = NettyWebSocket.class.cast(h.onCompleted());
logger.trace("Connection was closed abnormally (that is, with no close frame being sent).");
if (webSocket != null)
webSocket.close(
1006, "Connection was closed abnormally (that is, with no close frame being sent).");
} catch (Throwable t) {
logger.error("onError", t);
}
}
@Override
public void onError(NettyResponseFuture<?> future, Throwable e) {
logger.warn("onError {}", e);
try {
WebSocketUpgradeHandler h = (WebSocketUpgradeHandler) future.getAsyncHandler();
NettyWebSocket webSocket = NettyWebSocket.class.cast(h.onCompleted());
if (webSocket != null) {
webSocket.onError(e.getCause());
webSocket.close();
}
} catch (Throwable t) {
logger.error("onError", t);
}
}
@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);
}