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package org.frameworkset.web.socket.handler;

import java.util.Map;

import org.frameworkset.http.ServerHttpRequest;
import org.frameworkset.http.ServerHttpResponse;
import org.frameworkset.web.socket.inf.WebSocketHandler;

public interface HandshakeHandler {
	/**
	 * Initiate the handshake.
	 * @param request the current request
	 * @param response the current response
	 * @param wsHandler the handler to process WebSocket messages; see
	 * {@link PerConnectionWebSocketHandler} for providing a handler with
	 * per-connection lifecycle.
	 * @param attributes attributes from the HTTP handshake to associate with the WebSocket
	 * session; the provided attributes are copied, the original map is not used.
	 * @return 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.
	 */
	boolean doHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler,
			Map attributes) throws HandshakeFailureException;

}