潘钊 / bsth_control · Files

package com.bsth.websocket;

import java.util.Map;

import javax.servlet.http.HttpSession;

import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.server.HandshakeInterceptor;

import com.bsth.common.Constants;

@Component
public class WebSocketHandshakeInterceptor implements HandshakeInterceptor {

	@Override
	public void afterHandshake(ServerHttpRequest request,
			ServerHttpResponse arg1, WebSocketHandler arg2, Exception arg3) {
	}

	@Override
	public boolean beforeHandshake(ServerHttpRequest request,
			ServerHttpResponse arg1, WebSocketHandler arg2,
			Map<String, Object> attributes) throws Exception {
		if (request instanceof ServletServerHttpRequest) {
			ServletServerHttpRequest servletRequest = (ServletServerHttpRequest) request;
			HttpSession session = servletRequest.getServletRequest()
					.getSession(false);
			if (session != null) {
				// 使用SESSION_USERNAME区分WebSocketHandler，以便定向发送消息
				String userName = session.getAttribute(Constants.SESSION_USERNAME).toString();
				attributes.put(Constants.SESSION_USERNAME, userName);
			}
		}
		return true;
	}
}