javascript websocket onmessage event.data
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javascript websocket onmessage event.data
提问by user33054
Using JavaScript WebSocket how to pass event.dataout onMessagefunction?
使用JavaScript的WebSocket怎么传event.data出来onMessage的功能？
var eventData = EventRequest("text");
..... codes .....
EventRequest = function (text)
{
var socket = new WebSocket ('ws://localhost:8080/');
websocket.onopen = function(evt) { onOpen(evt); };
websocket.onmessage = function(evt) { onMessage(evt); };
function onOpen (evt)
{
socket.send("text");
}
function onMessage (evt)
{
alert (evt.data);
return evt.data;
}
};
I tried different ways to pass evt.data out, but I have not been able to. I can see the correct evt.datadata. I just can not pass the data out of onMessagefunction.
我尝试了不同的方法来传递 evt.data，但我一直没能做到。我可以看到正确的evt.data数据。我只是无法将数据传递出去onMessage。
I tried
我试过
function wcConnection (){
this.dataInput = '';
}
Inside onMessagefunction, I added
在onMessage函数内部，我添加了
function onMessage (evt)
{
alert (evt.data);
this.dataInput = evt.data;
}
Any help would be appreciated.
任何帮助，将不胜感激。
回答by Terry
If you server is python tornado
如果你的服务器是 python 龙卷风
def on_message(self, message):
t = json.dumps(['foo', {'bar': ('baz', None, 1.0, 2)}])
self.write_message(t)
In your client, to retrieve the message, you could do
在您的客户端中，要检索消息，您可以执行以下操作
ws.onmessage = function (evt) {
console.log(JSON.parse(event.data));
}
you should see the json in the console
您应该会在控制台中看到 json
回答by Mohit Satish Pawar
Why are you returning value to websocket.onmessage function? This is the function where you got that value. If you want to pass the value to another function just pass the event object to that function and access it using "evt.data".
为什么要向 websocket.onmessage 函数返回值？这是您获得该值的函数。如果您想将值传递给另一个函数，只需将事件对象传递给该函数并使用“evt.data”访问它。
websocket.onmessage = function(evt) { responseData(evt); };
function responseData(evt) {
/* Here is your data, Do you what you want! */
console.log(JSON.parse(evt.data));
}
