Example usage for org.springframework.web.socket.sockjs.transport TransportType fromValue

Introduction

In this page you can find the example usage for org.springframework.web.socket.sockjs.transport TransportType fromValue.

Prototype

@Nullable
    public static TransportType fromValue(String value) 

Source Link

Usage

From source file:org.springframework.web.socket.sockjs.transport.TransportHandlingSockJsService.java

@Override
protected void handleTransportRequest(ServerHttpRequest request, ServerHttpResponse response,
        WebSocketHandler handler, String sessionId, String transport) throws SockJsException {

    TransportType transportType = TransportType.fromValue(transport);
    if (transportType == null) {
        logger.error("Unknown transport type for " + request.getURI());
        response.setStatusCode(HttpStatus.NOT_FOUND);
        return;/*from  w w  w  .  j a  v a 2s .  co m*/
    }

    TransportHandler transportHandler = this.handlers.get(transportType);
    if (transportHandler == null) {
        logger.error("No TransportHandler for " + request.getURI());
        response.setStatusCode(HttpStatus.NOT_FOUND);
        return;
    }

    HttpMethod supportedMethod = transportType.getHttpMethod();
    if (!supportedMethod.equals(request.getMethod())) {
        if (HttpMethod.OPTIONS.equals(request.getMethod()) && transportType.supportsCors()) {
            response.setStatusCode(HttpStatus.NO_CONTENT);
            addCorsHeaders(request, response, HttpMethod.OPTIONS, supportedMethod);
            addCacheHeaders(response);
        } else if (transportType.supportsCors()) {
            sendMethodNotAllowed(response, supportedMethod, HttpMethod.OPTIONS);
        } else {
            sendMethodNotAllowed(response, supportedMethod);
        }
        return;
    }

    HandshakeInterceptorChain chain = new HandshakeInterceptorChain(this.interceptors, handler);
    SockJsException failure = null;

    try {
        SockJsSession session = this.sessions.get(sessionId);
        if (session == null) {
            if (transportHandler instanceof SockJsSessionFactory) {
                Map<String, Object> attributes = new HashMap<String, Object>();
                if (!chain.applyBeforeHandshake(request, response, attributes)) {
                    return;
                }
                SockJsSessionFactory sessionFactory = (SockJsSessionFactory) transportHandler;
                session = createSockJsSession(sessionId, sessionFactory, handler, attributes);
            } else {
                response.setStatusCode(HttpStatus.NOT_FOUND);
                if (logger.isDebugEnabled()) {
                    logger.debug(
                            "Session not found, sessionId=" + sessionId + ". The session may have been closed "
                                    + "(e.g. missed heart-beat) while a message was coming in.");
                }
                return;
            }
        }

        if (transportType.sendsNoCacheInstruction()) {
            addNoCacheHeaders(response);
        }

        if (transportType.supportsCors()) {
            addCorsHeaders(request, response);
        }

        transportHandler.handleRequest(request, response, handler, session);
        chain.applyAfterHandshake(request, response, null);
    } catch (SockJsException ex) {
        failure = ex;
    } catch (Throwable ex) {
        failure = new SockJsException("Uncaught failure for request " + request.getURI(), sessionId, ex);
    } finally {
        if (failure != null) {
            chain.applyAfterHandshake(request, response, failure);
            throw failure;
        }
    }
}

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