首先使用node.js 搭建一个简易的 websocket服务器：
var cons = new Array();
var ws = require(‘ws‘).Server;
var server = new ws({ port: 8888 });
server.on(‘connection‘, function (ws) {
console.log(‘new connection founded successfully‘);
cons.push(ws);
ws.on(‘message‘, function (data) {
for (var i = 0; i < cons.length; i++) {
cons[i].send(data);
}
});
ws.on(‘close‘, function () {
for (var i = 0; i < cons.length; i++) {
if (cons[i] == ws) cons.splice(i, 1);
}
});
});
console.log(‘websocket-server running...‘);
接下来为了更容易理解， 我在这分为两个页面，一个为视频者页面，另一个是观看者页面
下面代码为视频者页面：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script src="jQuery_1.8.2.min.js"></script>
<script type="text/javascript">
$(function () {
var video = document.getElementById("video");
var canvas = document.getElementById("canvas"),
context = canvas.getContext("2d");
var w;
if (navigator.webkitGetUserMedia) {
navigator.webkitGetUserMedia({ video: true }, function (stream) {
video.src = window.webkitURL.createObjectURL(stream);
video.play();
w = new WebSocket(url);
w.onopen = function () {
sendImg();
}
w.onmessage = function (e) {
sendImg();
}
}, function () {
console.log("video error");
});
var host = ‘localhost‘;
var port = 8888;
var url = ‘ws://‘ + host + ‘:‘ + port + ‘/‘;
function sendImg() {
context.drawImage(video, 0, 0, 320, 320);
var imgData = canvas.toDataURL();
w.send(imgData);
}
}
});
</script>
</head>
<body>
<video id="video" width="640" height="480" style="background:#000;" autoplay></video>
<canvas style="display:none" id="canvas" width="320" height="320"></canvas>
</body>
</html>
接下来是观看者页面：
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<script src="jQuery_1.8.2.min.js"></script>
<script>
$(function () {
var host = ‘localhost‘;
var port = 8888;
var url = ‘ws://‘ + host + ‘:‘ + port + ‘/‘;
var w = new WebSocket(url);
w.onmessage = function (e) {
$("#canvas").attr("src", e.data);
}
});
</script>
</head>
<body>
<img id="canvas" width="320" height="320" />
</body>
</html>
效果如下（不要看人！看效果^_^）：
时间： 2024-10-12 07:12:03