完美解决spring websocket自动断开连接再创建引发的问题

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我是靠谱客的博主殷勤汽车，这篇文章主要介绍完美解决spring websocket自动断开连接再创建引发的问题，现在分享给大家，希望可以做个参考。

问题：由于 web session 超时时间为 30 分钟，如用户在 web session 规定时间内没有退出系统，但由于其它原因用户却断开的 websocket 的连接，如果用户还要聊天或是其它 websocket 方面的操作，那么就只能重新连接...

看代码：

复制代码

var socket; 
var $ = function() { 
 return document.getElementById(arguments[0]); 
} 
var log = function(msg) { 
 $("log").innerHTML ? $("log").innerHTML += "<br />" + msg : $("log").innerHTML = msg; 
} 
var initWebSocket = function() { 
 if (window.WebSocket) { 
  socket = new WebSocket("ws://127.0.0.1:8080/websocket"); 
  socket.onmessage = function(event) { 
   var json = JSON.parse(event.data); 
   document.getElementById("message").value = json.message; 
  }; 
  socket.onopen = function(event) { 
   log("Web Socket opened!"); 
  }; 
  socket.onclose = function(event) { 
   log("Web Socket closed."); 
  }; 
  socket.onerror = function(event) { 
   log("Web Socket error."); 
  }; 
 } else { 
  log("Your browser does not support Web Socket."); 
 } 
} 
var send = function() { 
 var data = function() { 
  socket.send("{'send':1,'take':2,'message':" + Math.random() + "}"); 
 }; 
 if (socket.readyState !== 1) { 
  socket.close(); 
  initWebSocket(); 
  setTimeout(function() { 
   data(); 
  }, 250); 
 } else { 
  data(); 
 }; 
 
} 
window.onload = function() { 
 initWebSocket(); 
}

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var socket; 
var $ = function() { 
 return document.getElementById(arguments[0]); 
} 
var log = function(msg) { 
 $("log").innerHTML ? $("log").innerHTML += "<br />" + msg : $("log").innerHTML = msg; 
} 
var initWebSocket = function() { 
 if (window.WebSocket) { 
  socket = new WebSocket("ws://127.0.0.1:8080/websocket"); 
  socket.onmessage = function(event) { 
   var json = JSON.parse(event.data); 
   document.getElementById("message").value = json.message; 
  }; 
  socket.onopen = function(event) { 
   log("Web Socket opened!"); 
  }; 
  socket.onclose = function(event) { 
   log("Web Socket closed."); 
  }; 
  socket.onerror = function(event) { 
   log("Web Socket error."); 
  }; 
 } else { 
  log("Your browser does not support Web Socket."); 
 } 
} 
var send = function() { 
 var data = function() { 
  socket.send("{'send':1,'take':2,'message':" + Math.random() + "}"); 
 }; 
 if (socket.readyState !== 1) { 
  socket.close(); 
  initWebSocket(); 
  setTimeout(function() { 
   data(); 
  }, 250); 
 } else { 
  data(); 
 }; 
 
} 
window.onload = function() { 
 initWebSocket(); 
}