JavaScript Not Sending Info To WebSocket When Page is Loaded
Question
I am having trouble sending information of a session cookie when loading a page.
Here is how the function executes
<body onload="example();">
Here is the function it self
function example() {
websocket.send("<?php print($_SESSION['example']) ?>")
}
I've tried this way as well, but still does not work.
function example() {
websocket.send("Test")
}
I also tried calling this function when a button is clicked and it does work.
I was thinking maybe the connection to the websocket is not fast enough and the example(); function is called before the connection is established. Please let me know how I can make this work.
2 answers
solution1
1 2014-06-05 16:22:50
This a complete example of how to connect to a WebSocket from the onload document event:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>WebSocket Sample</title>
<script type="text/javascript">
function example()
{
// open websocket
var socket = new WebSocket('ws://localhost:80');
socket.onopen = function() {
console.log("onopen!");
// Web Socket is connected. send an initial random message.
socket.send("Hello!");
};
}
</script>
</head>
<body onload="example();">
<h1>Title</h1>
</body>
</html>
solution2
1 ACCPTED 2014-06-05 18:04:28
I found out that the connection stablish after the execution of the function so what I simply did was setTimeout , even duh its not a good practice, it will be enough for the project am doing. Here is short version of my solution.
<!DOCTYPE HTML>
<HTML>
<HEAD>
<script language="javascript" type="text/javascript">
function example() {
function sendUser() {
setTimeout(
function() {
websocket.send("Wroked!")
}, 1000);
}
}
</script>
</HEAD>
<BODY onload="example();">
</BODY>
</HTML>
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.