1、增加websocket保活

sec-beidou/src/main/java/com/imdroid/beidou/controller/WebSocketServer.java

@@ -38,7 +38,7 @@ public class WebSocketServer {
 
     @OnMessage
     public void onMessage(String msg, Session session){
-        log.info("received msg from "+session.getBasicRemote());
+        log.info("websocket: "+msg);
     }
 
     @OnError

sec-beidou/src/main/resources/templates/page/cmd_line.html

@@ -116,7 +116,12 @@
 
 <!-- Web socket operations-->
 <script type="text/javascript">
+	var websocket;
+	var intervalId;
+	var rxWin;
+
 	layui.$(function(){
+		rxWin = layui.$('#rx_win');
 		if(typeof(WebSocket) == "undefined"){
 			console.log("WebSocket not support for this WebBrowser!")
 		}
@@ -129,10 +134,8 @@
 	function connectWebSocket() {
 		//获取当前网址，如： http://localhost:8080/ems/Pages/Basic/Person.jsp
 		var curPath = window.document.location.href;
-		console.log(curPath);
 		//获取主机地址之后的目录，如： /ems/Pages/Basic/Person.jsp
 		var pathName = window.document.location.pathname;
-		console.log(pathName);
 		var pos = curPath.indexOf(pathName);
 		//获取主机地址，如： http://localhost:8080
 		var basePath = curPath.substring(0, pos);
@@ -140,24 +143,33 @@
 		//建立webSocket连接
 		var webSocktPath;
 		webSocktPath = (basePath+"/websocket").replace("http","ws");
-		var websocket = new WebSocket(webSocktPath);
+		websocket = new WebSocket(webSocktPath);
 
 		//打开webSokcet连接时，回调该函数
 		websocket.onopen = function () {
 			console.log("Socket open");
+			intervalId = setInterval(function() {
+				websocket.send("hello");
+			}, 60000);// keep alive
 		}
 		websocket.onerror = function (){
 			console.log("Socket error");
 			layui.layer.alert("Open web socket failed!");
 		}
+		websocket.onclose = function (){
+			rxWin.append("websocket closed!\r\n");
+			// 如果需要停止重复执行的定时任务
+			clearInterval(intervalId);
+		}
 		//接收信息
 		websocket.onmessage = function (event) {
-			var rxWin = layui.$('#rx_win');
-			rxWin.val(rxWin.val()+event.data + "\r\n");
-			var obj = document.getElementById("rx_win");
-			obj.scrollTop = obj.scrollHeight;
+			rxWin.append(event.data + "\r\n");
+			rxWin.scrollTop = rxWin.scrollHeight;
 		}
+
 	}
+
+
 </script>
 
 </body>