org.springframework.web.socket.server

Interface HandshakeHandler

All Known Implementing Classes:

DefaultHandshakeHandler, WebSocketTransportHandler

public interface HandshakeHandler

Contract for processing a WebSocket handshake request.

Since:

4.0

Author:

Rossen Stoyanchev

See Also:

HandshakeInterceptor, WebSocketHttpRequestHandler, SockJsService

Method Summary

Modifier and Type	Method and Description
boolean	doHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map<String,Object> attributes) Initiate the handshake.

Method Detail

doHandshake

boolean doHandshake(ServerHttpRequest request,
                    ServerHttpResponse response,
                    WebSocketHandler wsHandler,
                    Map<String,Object> attributes)
             throws HandshakeFailureException

Initiate the handshake.

Parameters:

request - the current request

response - the current response

wsHandler - the handler to process WebSocket messages; see PerConnectionWebSocketHandler for providing a handler with per-connection lifecycle.

attributes - handshake request specific attributes to be set on the WebSocket session via HandshakeInterceptor and thus made available to the WebSocketHandler;

Returns:

whether the handshake negotiation was successful or not. In either case the response status, headers, and body will have been updated to reflect the result of the negotiation

Throws:

HandshakeFailureException - thrown when handshake processing failed to complete due to an internal, unrecoverable error, i.e. a server error as opposed to a failure to successfully negotiate the handshake.