Example usage for org.springframework.http HttpStatus SWITCHING_PROTOCOLS

Introduction

In this page you can find the example usage for org.springframework.http HttpStatus SWITCHING_PROTOCOLS.

Prototype

HttpStatus SWITCHING_PROTOCOLS

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Document

101 Switching Protocols .

Usage

From source file:org.springframework.web.socket.server.DefaultHandshakeHandler.java

@Override
public final boolean doHandshake(ServerHttpRequest request, ServerHttpResponse response,
        WebSocketHandler webSocketHandler) throws IOException, HandshakeFailureException {

    logger.debug("Starting handshake for " + request.getURI());

    if (!HttpMethod.GET.equals(request.getMethod())) {
        response.setStatusCode(HttpStatus.METHOD_NOT_ALLOWED);
        response.getHeaders().setAllow(Collections.singleton(HttpMethod.GET));
        logger.debug("Only HTTP GET is allowed, current method is " + request.getMethod());
        return false;
    }//w  w  w .  ja va 2 s  .  c o m
    if (!"WebSocket".equalsIgnoreCase(request.getHeaders().getUpgrade())) {
        handleInvalidUpgradeHeader(request, response);
        return false;
    }
    if (!request.getHeaders().getConnection().contains("Upgrade")
            && !request.getHeaders().getConnection().contains("upgrade")) {
        handleInvalidConnectHeader(request, response);
        return false;
    }
    if (!isWebSocketVersionSupported(request)) {
        handleWebSocketVersionNotSupported(request, response);
        return false;
    }
    if (!isValidOrigin(request)) {
        response.setStatusCode(HttpStatus.FORBIDDEN);
        return false;
    }
    String wsKey = request.getHeaders().getSecWebSocketKey();
    if (wsKey == null) {
        logger.debug("Missing \"Sec-WebSocket-Key\" header");
        response.setStatusCode(HttpStatus.BAD_REQUEST);
        return false;
    }

    String selectedProtocol = selectProtocol(request.getHeaders().getSecWebSocketProtocol());
    // TODO: select extensions

    logger.debug("Upgrading HTTP request");

    response.setStatusCode(HttpStatus.SWITCHING_PROTOCOLS);
    response.getHeaders().setUpgrade("WebSocket");
    response.getHeaders().setConnection("Upgrade");
    response.getHeaders().setSecWebSocketProtocol(selectedProtocol);
    response.getHeaders().setSecWebSocketAccept(getWebSocketKeyHash(wsKey));
    // TODO: response.getHeaders().setSecWebSocketExtensions(extensions);

    response.flush();

    if (logger.isTraceEnabled()) {
        logger.trace("Upgrading with " + webSocketHandler);
    }

    this.requestUpgradeStrategy.upgrade(request, response, selectedProtocol, webSocketHandler);

    return true;
}

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