Example usage for org.springframework.web.socket.sockjs SockJsException SockJsException

Introduction

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

Prototype

public SockJsException(String message, @Nullable String sessionId, @Nullable Throwable cause) 

Source Link

Document

Constructor for SockJsException.

Usage

From source file:org.springframework.web.socket.sockjs.support.AbstractSockJsService.java

/**
 * This method determines the SockJS path and handles SockJS static URLs.
 * Session URLs and raw WebSocket requests are delegated to abstract methods.
 *//*from www  .j  a  v  a2 s.co m*/
@Override
public final void handleRequest(ServerHttpRequest request, ServerHttpResponse response,
        @Nullable String sockJsPath, WebSocketHandler wsHandler) throws SockJsException {

    if (sockJsPath == null) {
        if (logger.isWarnEnabled()) {
            logger.warn("Expected SockJS path. Failing request: " + request.getURI());
        }
        response.setStatusCode(HttpStatus.NOT_FOUND);
        return;
    }

    try {
        request.getHeaders();
    } catch (InvalidMediaTypeException ex) {
        // As per SockJS protocol content-type can be ignored (it's always json)
    }

    String requestInfo = (logger.isDebugEnabled() ? request.getMethod() + " " + request.getURI() : null);

    try {
        if (sockJsPath.equals("") || sockJsPath.equals("/")) {
            if (requestInfo != null) {
                logger.debug("Processing transport request: " + requestInfo);
            }
            response.getHeaders().setContentType(new MediaType("text", "plain", StandardCharsets.UTF_8));
            response.getBody().write("Welcome to SockJS!\n".getBytes(StandardCharsets.UTF_8));
        }

        else if (sockJsPath.equals("/info")) {
            if (requestInfo != null) {
                logger.debug("Processing transport request: " + requestInfo);
            }
            this.infoHandler.handle(request, response);
        }

        else if (sockJsPath.matches("/iframe[0-9-.a-z_]*.html")) {
            if (!this.allowedOrigins.isEmpty() && !this.allowedOrigins.contains("*")) {
                if (requestInfo != null) {
                    logger.debug("Iframe support is disabled when an origin check is required. "
                            + "Ignoring transport request: " + requestInfo);
                }
                response.setStatusCode(HttpStatus.NOT_FOUND);
                return;
            }
            if (this.allowedOrigins.isEmpty()) {
                response.getHeaders().add(XFRAME_OPTIONS_HEADER, "SAMEORIGIN");
            }
            if (requestInfo != null) {
                logger.debug("Processing transport request: " + requestInfo);
            }
            this.iframeHandler.handle(request, response);
        }

        else if (sockJsPath.equals("/websocket")) {
            if (isWebSocketEnabled()) {
                if (requestInfo != null) {
                    logger.debug("Processing transport request: " + requestInfo);
                }
                handleRawWebSocketRequest(request, response, wsHandler);
            } else if (requestInfo != null) {
                logger.debug("WebSocket disabled. Ignoring transport request: " + requestInfo);
            }
        }

        else {
            String[] pathSegments = StringUtils.tokenizeToStringArray(sockJsPath.substring(1), "/");
            if (pathSegments.length != 3) {
                if (logger.isWarnEnabled()) {
                    logger.warn("Invalid SockJS path '" + sockJsPath + "' - required to have 3 path segments");
                }
                if (requestInfo != null) {
                    logger.debug("Ignoring transport request: " + requestInfo);
                }
                response.setStatusCode(HttpStatus.NOT_FOUND);
                return;
            }

            String serverId = pathSegments[0];
            String sessionId = pathSegments[1];
            String transport = pathSegments[2];

            if (!isWebSocketEnabled() && transport.equals("websocket")) {
                if (requestInfo != null) {
                    logger.debug("WebSocket disabled. Ignoring transport request: " + requestInfo);
                }
                response.setStatusCode(HttpStatus.NOT_FOUND);
                return;
            } else if (!validateRequest(serverId, sessionId, transport) || !validatePath(request)) {
                if (requestInfo != null) {
                    logger.debug("Ignoring transport request: " + requestInfo);
                }
                response.setStatusCode(HttpStatus.NOT_FOUND);
                return;
            }

            if (requestInfo != null) {
                logger.debug("Processing transport request: " + requestInfo);
            }
            handleTransportRequest(request, response, wsHandler, sessionId, transport);
        }
        response.close();
    } catch (IOException ex) {
        throw new SockJsException("Failed to write to the response", null, ex);
    }
}

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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  ww. j a v  a 2  s  . c  om*/
    }

    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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