Package org.springframework.web.socket.server

Interface HandshakeHandler

All Known Implementing Classes:

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

Method Details

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 - the attributes from the HTTP handshake to associate with the WebSocket session; the provided attributes are copied, the original map is not used.

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.