/**
* When a session is connected through a higher-level protocol it has a chance
* to use heartbeat management to shut down sessions that are too slow to send
* or receive messages. However, after a WebSocketSession is established and
* before the higher level protocol is fully connected there is a possibility
* for sessions to hang. This method checks and closes any sessions that have
* been connected for more than 60 seconds without having received a single
* message.
*/
private void checkSessions() throws IOException {
long currentTime = System.currentTimeMillis();
if (!isRunning() || (currentTime - this.lastSessionCheckTime < TIME_TO_FIRST_MESSAGE)) {
return;
}
if (this.sessionCheckLock.tryLock()) {
try {
for (WebSocketSessionHolder holder : this.sessions.values()) {
if (holder.hasHandledMessages()) {
continue;
}
long timeSinceCreated = currentTime - holder.getCreateTime();
if (timeSinceCreated < TIME_TO_FIRST_MESSAGE) {
continue;
}
WebSocketSession session = holder.getSession();
if (logger.isErrorEnabled()) {
logger.error("No messages received after " + timeSinceCreated + " ms. " +
"Closing " + holder.getSession() + ".");
}
try {
this.stats.incrementNoMessagesReceivedCount();
session.close(CloseStatus.SESSION_NOT_RELIABLE);
}
catch (Throwable t) {
logger.error("Failure while closing " + session, t);
}
}
}
finally {
this.sessionCheckLock.unlock();
}
}
}
/** Handle an outbound Spring Message to a WebSocket client. */
@Override
public void handleMessage(Message<?> message) throws MessagingException {
String sessionId = resolveSessionId(message);
if (sessionId == null) {
logger.error("Couldn't find sessionId in " + message);
return;
}
WebSocketSessionHolder holder = this.sessions.get(sessionId);
if (holder == null) {
if (logger.isDebugEnabled()) {
// The broker may not have removed the session yet
logger.debug("No session for " + message);
}
return;
}
WebSocketSession session = holder.getSession();
try {
findProtocolHandler(session).handleMessageToClient(session, message);
} catch (SessionLimitExceededException ex) {
try {
if (logger.isDebugEnabled()) {
logger.debug("Terminating '" + session + "'", ex);
}
this.stats.incrementLimitExceededCount();
clearSession(session, ex.getStatus()); // clear first, session may be unresponsive
session.close(ex.getStatus());
} catch (Exception secondException) {
logger.debug("Failure while closing session " + sessionId + ".", secondException);
}
} catch (Exception e) {
// Could be part of normal workflow (e.g. browser tab closed)
logger.debug("Failed to send message to client in " + session + ": " + message, e);
}
}
/** 给特定的在线用户发送消息 */
public void sendMessageToUsers(ArrayList<Long> userIdList, TextMessage message) {
if (userIdList == null) {
return;
}
int listSize = userIdList.size();
if (listSize == 0) {
return;
}
int i = 0;
for (WebSocketSession user : users) {
try {
if (user.getAttributes().get("USER_ID") != null) {
if (user.isOpen() && userIdList.contains(user.getAttributes().get("USER_ID"))) {
user.sendMessage(message);
i++;
if (listSize == i) {
break;
}
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/** 会话抛出异常 */
@Override
public void handleTransportError(WebSocketSession session, Throwable arg1) throws Exception {
// TODO Auto-generated method stub
if (session.isOpen()) {
session.close();
}
WebSocketCache.removeMemberSession(session);
}
@Override
public void handleTransportError(WebSocketSession session, Throwable exception)
throws IOException {
if (session.isOpen()) {
session.close();
}
users.remove(session);
}
private void clearSession(WebSocketSession session, CloseStatus closeStatus) throws Exception {
if (logger.isDebugEnabled()) {
logger.debug("Clearing session " + session.getId());
}
if (this.sessions.remove(session.getId()) != null) {
this.stats.decrementSessionCount(session);
}
findProtocolHandler(session).afterSessionEnded(session, closeStatus, this.clientInboundChannel);
}
@Override
public void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
JsonObject jsonMessage = gson.fromJson(message.getPayload(), JsonObject.class);
log.debug("Incoming message: {}", jsonMessage);
switch (jsonMessage.get("id").getAsString()) {
case "start":
start(session, jsonMessage);
break;
case "show_faces":
setVisualization(session, jsonMessage);
break;
case "scale_factor":
setScaleFactor(session, jsonMessage);
break;
case "process_num_frames":
setProcessNumberFrames(session, jsonMessage);
break;
case "width_to_process":
setWidthToProcess(session, jsonMessage);
break;
case "get_stats":
getStats(session);
break;
case "euclidean_dis":
setEuclideanDistance(session, jsonMessage);
break;
case "area_threshold":
setAreaThreshold(session, jsonMessage);
break;
case "track_treshold":
setTrackThreshold(session, jsonMessage);
break;
case "stop":
{
UserSession user = users.remove(session.getId());
if (user != null) {
user.release();
}
break;
}
case "onIceCandidate":
{
JsonObject candidate = jsonMessage.get("candidate").getAsJsonObject();
UserSession user = users.get(session.getId());
if (user != null) {
user.addCandidate(candidate);
}
break;
}
default:
error(session, "Invalid message with id " + jsonMessage.get("id").getAsString());
break;
}
}
@Override
public void handleTransportError(WebSocketSession session, Throwable exception)
throws Exception {
WebSocketSession removed =
IntegrationWebSocketContainer.this.sessions.remove(session.getId());
if (removed != null) {
IntegrationWebSocketContainer.this.sessions.remove(session.getId());
}
throw new Exception(exception);
}
/** 给所有在线用户发送消息 */
public void sendMessageToUsers(TextMessage message) {
for (WebSocketSession user : users) {
try {
if (user.isOpen()) {
user.sendMessage(message);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) {
List<WebSocketSession> sessions = Sessions.getSessions();
for (WebSocketSession webSocketSession : sessions) {
try {
webSocketSession.sendMessage(new TextMessage(message.getPayload()));
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
// WebSocketHandlerDecorator could close the session
if (!session.isOpen()) {
return;
}
this.stats.incrementSessionCount(session);
session = new ConcurrentWebSocketSessionDecorator(session, getSendTimeLimit(), getSendBufferSizeLimit());
this.sessions.put(session.getId(), new WebSocketSessionHolder(session));
findProtocolHandler(session).afterSessionStarted(session, this.clientInboundChannel);
}
@Override
public void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
JsonObject jsonMessage = gson.fromJson(message.getPayload(), JsonObject.class);
log.debug("Incoming message: {}", jsonMessage);
switch (jsonMessage.get("id").getAsString()) {
case "start":
start(session, jsonMessage);
break;
case "show_mouths":
setVisualization(session, jsonMessage);
break;
case "scale_factor":
log.debug("Case scale factor");
setScaleFactor(session, jsonMessage);
break;
case "process_num_frames":
log.debug("Case process num frames");
setProcessNumberFrames(session, jsonMessage);
break;
case "width_to_process":
log.debug("Case width to process");
setWidthToProcess(session, jsonMessage);
break;
case "stop":
{
UserSession user = users.remove(session.getId());
if (user != null) {
user.release();
}
break;
}
case "onIceCandidate":
{
JsonObject candidate = jsonMessage.get("candidate").getAsJsonObject();
UserSession user = users.get(session.getId());
if (user != null) {
IceCandidate cand =
new IceCandidate(
candidate.get("candidate").getAsString(),
candidate.get("sdpMid").getAsString(),
candidate.get("sdpMLineIndex").getAsInt());
user.addCandidate(cand);
}
break;
}
default:
sendError(session, "Invalid message with id " + jsonMessage.get("id").getAsString());
break;
}
}
@Test
public void registerWebSocketHandlerWithSockJS() throws Exception {
WebSocketSession session =
this.webSocketClient
.doHandshake(new AbstractWebSocketHandler() {}, getWsBaseUrl() + "/sockjs/websocket")
.get();
TestWebSocketHandler serverHandler = this.wac.getBean(TestWebSocketHandler.class);
assertTrue(serverHandler.connectLatch.await(2, TimeUnit.SECONDS));
session.close();
}
@Test
public void fallbackAfterTransportFailure() throws Exception {
this.testFilter.sendErrorMap.put("/websocket", 200);
this.testFilter.sendErrorMap.put("/xhr_streaming", 500);
TestClientHandler handler = new TestClientHandler();
initSockJsClient(createWebSocketTransport(), createXhrTransport());
WebSocketSession session = this.sockJsClient.doHandshake(handler, this.baseUrl + "/echo").get();
assertEquals("Fallback didn't occur", XhrClientSockJsSession.class, session.getClass());
TextMessage message = new TextMessage("message1");
session.sendMessage(message);
handler.awaitMessage(message, 5000);
}
@Test
public void sendMessageToController() throws Exception {
TextMessage message = create(StompCommand.SEND).headers("destination:/app/simple").build();
WebSocketSession session = doHandshake(new TestClientWebSocketHandler(0, message), "/ws").get();
SimpleController controller = this.wac.getBean(SimpleController.class);
try {
assertTrue(controller.latch.await(10, TimeUnit.SECONDS));
} finally {
session.close();
}
}
private void sendMessage(final WebSocketSession session, final TextMessage textMessage) {
this.taskExecutor.execute(
() -> {
if (session.isOpen()) {
try {
session.sendMessage(textMessage);
} catch (IOException e) {
logger.error("sendMessage to session", e);
}
}
});
}
private <P, R> Response<R> sendRequestWebSocket(Request<P> request, Class<R> resultClass) {
log.info("Req-> {}", request.toString());
Future<Response<JsonElement>> responseFuture = null;
if (request.getId() != null) {
responseFuture = pendingRequests.prepareResponse(request.getId());
}
try {
synchronized (wsSession) {
wsSession.sendMessage(new TextMessage(JsonUtils.toJson(request)));
}
} catch (Exception e) {
throw new KurentoException(
"Exception while sending message '"
+ JsonUtils.toJson(request)
+ "' to websocket with native sessionId '"
+ wsSession.getId()
+ "'",
e);
}
if (responseFuture == null) {
return null;
}
Response<JsonElement> responseJsonObject;
try {
responseJsonObject = responseFuture.get(TIMEOUT, TimeUnit.MILLISECONDS);
log.info("<-Res {}", responseJsonObject.toString());
} catch (InterruptedException e) {
// TODO What to do in this case?
throw new JsonRpcException("Interrupted while waiting for a response", e);
} catch (ExecutionException e) {
// TODO Is there a better way to handle this?
throw new JsonRpcException("This exception shouldn't be thrown", e);
} catch (TimeoutException e) {
throw new TransportException(
"Timeout of "
+ TIMEOUT
+ " milliseconds waiting from response to request with id:"
+ request.getId(),
e);
}
return MessageUtils.convertResponse(responseJsonObject, resultClass);
}
private void start(final WebSocketSession session, JsonObject jsonMessage) {
try {
// Media Logic (Media Pipeline and Elements)
UserSession user = new UserSession();
MediaPipeline pipeline = kurento.createMediaPipeline();
user.setMediaPipeline(pipeline);
WebRtcEndpoint webRtcEndpoint = new WebRtcEndpoint.Builder(pipeline).build();
user.setWebRtcEndpoint(webRtcEndpoint);
users.put(session.getId(), user);
webRtcEndpoint.addOnIceCandidateListener(
new EventListener<OnIceCandidateEvent>() {
@Override
public void onEvent(OnIceCandidateEvent event) {
JsonObject response = new JsonObject();
response.addProperty("id", "iceCandidate");
response.add("candidate", JsonUtils.toJsonObject(event.getCandidate()));
try {
synchronized (session) {
session.sendMessage(new TextMessage(response.toString()));
}
} catch (IOException e) {
log.debug(e.getMessage());
}
}
});
mouth = new NuboMouthDetector.Builder(pipeline).build();
webRtcEndpoint.connect(mouth);
mouth.connect(webRtcEndpoint);
// SDP negotiation (offer and answer)
String sdpOffer = jsonMessage.get("sdpOffer").getAsString();
String sdpAnswer = webRtcEndpoint.processOffer(sdpOffer);
// Sending response back to client
JsonObject response = new JsonObject();
response.addProperty("id", "startResponse");
response.addProperty("sdpAnswer", sdpAnswer);
synchronized (session) {
session.sendMessage(new TextMessage(response.toString()));
}
webRtcEndpoint.gatherCandidates();
} catch (Throwable t) {
sendError(session, t.getMessage());
}
}
/** 关闭连接后 */
public void afterConnectionClosed(WebSocketSession session, CloseStatus closeStatus)
throws Exception {
System.out.println("Websocket:" + session.getId() + "已经关闭");
Iterator<Entry<Long, WebSocketSession>> it = userSocketSessionMap.entrySet().iterator();
// 移除Socket会话
while (it.hasNext()) {
Entry<Long, WebSocketSession> entry = it.next();
if (entry.getValue().getId().equals(session.getId())) {
userSocketSessionMap.remove(entry.getKey());
System.out.println("Socket会话已经移除:用户ID" + entry.getKey());
break;
}
}
}
/** 消息传输错误处理 */
public void handleTransportError(WebSocketSession session, Throwable exception) throws Exception {
if (session.isOpen()) {
session.close();
}
Iterator<Entry<Long, WebSocketSession>> it = userSocketSessionMap.entrySet().iterator();
// 移除Socket会话
while (it.hasNext()) {
Entry<Long, WebSocketSession> entry = it.next();
if (entry.getValue().getId().equals(session.getId())) {
userSocketSessionMap.remove(entry.getKey());
System.out.println("Socket会话已经移除:用户ID" + entry.getKey());
break;
}
}
}
@Override
public void destroy() throws Exception {
try {
// Notify sessions to stop flushing messages
for (WebSocketSession session : this.sessions.values()) {
try {
session.close(CloseStatus.GOING_AWAY);
} catch (Exception e) {
logger.error("Failed to close session id '" + session.getId() + "': " + e.getMessage());
}
}
} finally {
this.sessions.clear();
}
}
@Test(timeout = 5000)
public void fallbackAfterConnectTimeout() throws Exception {
TestClientHandler clientHandler = new TestClientHandler();
this.testFilter.sleepDelayMap.put("/xhr_streaming", 10000L);
this.testFilter.sendErrorMap.put("/xhr_streaming", 503);
initSockJsClient(createXhrTransport());
this.sockJsClient.setConnectTimeoutScheduler(this.wac.getBean(ThreadPoolTaskScheduler.class));
WebSocketSession clientSession =
sockJsClient.doHandshake(clientHandler, this.baseUrl + "/echo").get();
assertEquals("Fallback didn't occur", XhrClientSockJsSession.class, clientSession.getClass());
TextMessage message = new TextMessage("message1");
clientSession.sendMessage(message);
clientHandler.awaitMessage(message, 5000);
clientSession.close();
}
public WebSocketServerSession(
String sessionId,
Object registerInfo,
SessionsManager sessionsManager,
WebSocketSession wsSession) {
super(sessionId, registerInfo, sessionsManager, wsSession.getId());
this.wsSession = wsSession;
this.setRsHelper(
new JsonRpcRequestSenderHelper(sessionId) {
@Override
public <P, R> Response<R> internalSendRequest(Request<P> request, Class<R> resultClass)
throws IOException {
return sendRequestWebSocket(request, resultClass);
}
@Override
protected void internalSendRequest(
Request<? extends Object> request,
Class<JsonElement> resultClass,
Continuation<Response<JsonElement>> continuation) {
sendRequestWebSocket(request, resultClass, continuation);
}
});
}
private synchronized void sendMessage(WebSocketSession session, TextMessage message) {
try {
session.sendMessage(message);
} catch (IOException e) {
log.error("Exception sending message", e);
}
}
/** 连接成功 */
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
// TODO Auto-generated method stub
System.out.println(session);
Map<String, String> select = new HashMap<String, String>();
String userId = (String) session.getAttributes().get("userId");
String userPwd = (String) session.getAttributes().get("userPwd");
select.put("userId", userId);
select.put("userPwd", userPwd);
String result = webSocketService.getNewMessage(select);
session.sendMessage(new TextMessage(result.toString()));
WebSocketCache.putMemberSession(select.get("userId"), session);
}
public static void manageIfException(
WebSocketSession session, String methodName, ExceptionMethodWrapper method) {
try {
method.exec();
} catch (Throwable t) {
log.error(t.getMessage(), t);
InternalErrorCodes iec;
if (t instanceof AppException) {
AppException ae = (AppException) t;
iec = ae.getErrorCode();
} else {
iec = InternalErrorCodes.UNHANDLED_ERROR;
}
Response resp =
new Response.ResponseBuilder<>(methodName)
.status(iec.getStatus().intValue())
.error(new AppError(iec.getMessage(), t.getMessage(), iec.getCode()))
.build();
try {
session.sendMessage(new TextMessage(resp.toJsonStr()));
} catch (Exception e) {
log.error(e.getMessage(), e);
}
}
}
protected final SubProtocolHandler findProtocolHandler(WebSocketSession session) {
String protocol = null;
try {
protocol = session.getAcceptedProtocol();
} catch (Exception ex) {
// Shouldn't happen
logger.error(
"Failed to obtain session.getAcceptedProtocol(). Will use the "
+ "default protocol handler (if configured).",
ex);
}
SubProtocolHandler handler;
if (!StringUtils.isEmpty(protocol)) {
handler = this.protocolHandlerLookup.get(protocol);
Assert.state(
handler != null, "No handler for '" + protocol + "' among " + this.protocolHandlerLookup);
} else {
if (this.defaultProtocolHandler != null) {
handler = this.defaultProtocolHandler;
} else if (this.protocolHandlers.size() == 1) {
handler = this.protocolHandlers.iterator().next();
} else {
throw new IllegalStateException(
"Multiple protocol handlers configured and "
+ "no protocol was negotiated. Consider configuring a default SubProtocolHandler.");
}
}
return handler;
}
@Override
public void closeNativeSession(String reason) {
try {
wsSession.close(new CloseStatus(CloseStatus.NORMAL.getCode(), reason));
} catch (IOException e) {
log.warn("Exception closing webSocket session", e);
}
}
@Test
public void sendMessageToControllerAndReceiveReplyViaTopic() throws Exception {
TextMessage message1 =
create(StompCommand.SUBSCRIBE).headers("id:subs1", "destination:/topic/increment").build();
TextMessage message2 =
create(StompCommand.SEND).headers("destination:/app/increment").body("5").build();
TestClientWebSocketHandler clientHandler =
new TestClientWebSocketHandler(1, message1, message2);
WebSocketSession session = doHandshake(clientHandler, "/ws").get();
try {
assertTrue(clientHandler.latch.await(2, TimeUnit.SECONDS));
} finally {
session.close();
}
}
@Test
public void sendSubscribeToControllerAndReceiveReply() throws Exception {
String destHeader = "destination:/app/number";
TextMessage message = create(StompCommand.SUBSCRIBE).headers("id:subs1", destHeader).build();
TestClientWebSocketHandler clientHandler = new TestClientWebSocketHandler(1, message);
WebSocketSession session = doHandshake(clientHandler, "/ws").get();
try {
assertTrue(clientHandler.latch.await(2, TimeUnit.SECONDS));
String payload = clientHandler.actual.get(0).getPayload();
assertTrue(
"Expected STOMP destination=/app/number, got " + payload, payload.contains(destHeader));
assertTrue("Expected STOMP Payload=42, got " + payload, payload.contains("42"));
} finally {
session.close();
}
}
