Examples with BufferingStompDecoder org.springframework.messaging.simp.stomp.BufferingStompDecoder used on opensource projects

Example 1 with BufferingStompDecoder

use of org.springframework.messaging.simp.stomp.BufferingStompDecoder in project spring-framework by spring-projects.

the class StompSubProtocolHandler method handleMessageFromClient.

/**
 * Handle incoming WebSocket messages from clients.
 */
@Override
public void handleMessageFromClient(WebSocketSession session, WebSocketMessage<?> webSocketMessage, MessageChannel outputChannel) {
    List<Message<byte[]>> messages;
    try {
        ByteBuffer byteBuffer;
        if (webSocketMessage instanceof TextMessage) {
            byteBuffer = ByteBuffer.wrap(((TextMessage) webSocketMessage).asBytes());
        } else if (webSocketMessage instanceof BinaryMessage) {
            byteBuffer = ((BinaryMessage) webSocketMessage).getPayload();
        } else {
            return;
        }
        BufferingStompDecoder decoder = this.decoders.get(session.getId());
        if (decoder == null) {
            if (!session.isOpen()) {
                logger.trace("Dropped inbound WebSocket message due to closed session");
                return;
            }
            throw new IllegalStateException("No decoder for session id '" + session.getId() + "'");
        }
        messages = decoder.decode(byteBuffer);
        if (messages.isEmpty()) {
            if (logger.isTraceEnabled()) {
                logger.trace("Incomplete STOMP frame content received in session " + session + ", bufferSize=" + decoder.getBufferSize() + ", bufferSizeLimit=" + decoder.getBufferSizeLimit() + ".");
            }
            return;
        }
    } catch (Throwable ex) {
        if (logger.isErrorEnabled()) {
            logger.error("Failed to parse " + webSocketMessage + " in session " + session.getId() + ". Sending STOMP ERROR to client.", ex);
        }
        handleError(session, ex, null);
        return;
    }
    for (Message<byte[]> message : messages) {
        StompHeaderAccessor headerAccessor = MessageHeaderAccessor.getAccessor(message, StompHeaderAccessor.class);
        Assert.state(headerAccessor != null, "No StompHeaderAccessor");
        StompCommand command = headerAccessor.getCommand();
        boolean isConnect = StompCommand.CONNECT.equals(command) || StompCommand.STOMP.equals(command);
        boolean sent = false;
        try {
            headerAccessor.setSessionId(session.getId());
            headerAccessor.setSessionAttributes(session.getAttributes());
            headerAccessor.setUser(getUser(session));
            if (isConnect) {
                headerAccessor.setUserChangeCallback(user -> {
                    if (user != null && user != session.getPrincipal()) {
                        this.stompAuthentications.put(session.getId(), user);
                    }
                });
            }
            headerAccessor.setHeader(SimpMessageHeaderAccessor.HEART_BEAT_HEADER, headerAccessor.getHeartbeat());
            if (!detectImmutableMessageInterceptor(outputChannel)) {
                headerAccessor.setImmutable();
            }
            if (logger.isTraceEnabled()) {
                logger.trace("From client: " + headerAccessor.getShortLogMessage(message.getPayload()));
            }
            if (isConnect) {
                this.stats.incrementConnectCount();
            } else if (StompCommand.DISCONNECT.equals(command)) {
                this.stats.incrementDisconnectCount();
            }
            try {
                SimpAttributesContextHolder.setAttributesFromMessage(message);
                sent = outputChannel.send(message);
                if (sent) {
                    if (this.eventPublisher != null) {
                        Principal user = getUser(session);
                        if (isConnect) {
                            publishEvent(this.eventPublisher, new SessionConnectEvent(this, message, user));
                        } else if (StompCommand.SUBSCRIBE.equals(command)) {
                            publishEvent(this.eventPublisher, new SessionSubscribeEvent(this, message, user));
                        } else if (StompCommand.UNSUBSCRIBE.equals(command)) {
                            publishEvent(this.eventPublisher, new SessionUnsubscribeEvent(this, message, user));
                        }
                    }
                }
            } finally {
                SimpAttributesContextHolder.resetAttributes();
            }
        } catch (Throwable ex) {
            if (logger.isDebugEnabled()) {
                logger.debug("Failed to send message to MessageChannel in session " + session.getId(), ex);
            } else if (logger.isErrorEnabled()) {
                // Skip unsent CONNECT messages (likely auth issues)
                if (!isConnect || sent) {
                    logger.error("Failed to send message to MessageChannel in session " + session.getId() + ":" + ex.getMessage());
                }
            }
            handleError(session, ex, message);
        }
    }
}