如果你要有一个支持 WebSocket的服务器(Java、Php等),可以在浏览器中使用一个新的WebSocket服务协议,来打开一个链接: - <font color="rgb(0, 0, 136)">var</font> socket = <font color="rgb(0, 0, 136)">new</font> WebSocket(<font color="rgb(0, 153, 0)">"ws://172.0.0.1:8080/SpringWebSocketPush/websck"</font>);
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9 v* `7 h" u0 | U0 e% \与http://这一URL 前缀等价的WebSocket 前缀 是 ws:// ,安全 WebSocket 则有一个与http://等价的 wss:// 前缀。 1 H# @7 I- u# ^
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2 r0 @% A0 v6 T- W2 p3 w( ]7 U该套接口对象有四个用来监听套接口事件的回调: - socket.onopen = function(){
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& t p4 g. W# @& J% @3 t- //打开4 K2 N6 Q; ]& k( r, K1 J$ b4 a
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T) x! H6 B* W6 V# }- socket.onmessage = function(){
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4 s4 \+ F+ Y, p' S0 ]- //在event.data消息数据
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" N% A$ V- \- n( w4 C6 i. Y' ^, g( C- socket.onclose = function(){' m' i& Q9 Y% p" j
/ R: v; _, o5 r$ r' k5 S- k- //关闭WebSocket
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* s8 [1 d w1 Y; H' ~1 E- socket.onerror = function(){( V0 n+ u R2 n6 E' c( y5 j9 M6 h
, |& j" b2 Y, b; x- N- //错误触发
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通过套接口发送数据,调用socket.send: - <font color="rgb(79, 79, 79)">socket</font>.<font color="rgb(79, 79, 79)">send</font>(message)
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代码附上: - <!DOCTYPE html>' t ]- z! ~8 |
- <html>( F% g8 k' n& x; o5 l7 W; ]
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- <head>! {$ u2 B2 d: g
- <meta charset="UTF-8">: h0 H7 A% Q/ @6 a7 n+ a
- <meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no" name="viewport">
: y! j. W' e1 k8 U7 c6 V- G/ w - <title>WebSocket</title>
' B5 F- g* Q b- x - </head>
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6 y$ ]5 k7 V2 B" A- <body>. A6 P+ P$ Z! T8 w* i8 |8 {
- </body>
7 V0 W: {( b9 o! u' Y1 {% R - <script>, T+ v p& e0 }; v4 ^- j9 ]
- var socket;6 k3 H) q# \, i9 C3 @& [4 K$ U6 K
- if (window.WebSocket) {
3 `/ t$ X0 D& ~+ P) i( u7 C5 d9 u) X - socket = new WebSocket("ws://localhost:8080/myapp");4 c9 [# H. e' m9 f9 e% Y
- socket.onmessage = function(event) {& `; w' m$ S2 G/ |
- alert("Received data from websocket: " + event.data);
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- socket.onopen = function(event) {
* H$ {- n% G u1 c3 v | - alert("Web Socket opened!");
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- socket.onclose = function(event) {
0 i3 u# _, |2 o( g' Q- Q - alert("Web Socket closed.");
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- } else {
) Z$ f0 a$ r4 `8 Y" h8 K1 C - alert("Your browser does not support Websockets. (Use Chrome)");
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1 M) }* m% S& c, g5 }+ L" s6 W5 B, s- function send(message) {
, T2 T" ^2 Q" ^8 F - if (!window.WebSocket) {
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- }; o$ j2 s& R6 |
- if (socket.readyState == WebSocket.OPEN) {+ Z( F- S: b9 @, F; m! C0 p# \
- socket.send(message);
- g# H1 H- F9 \+ Q+ V l - } else {
8 f7 ^8 \8 A/ p. I - alert("The socket is not open.");: a7 ]* G: z# N/ I' V+ F$ f; z
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- </script>4 ?( k! b* M ?' _* N
( m" y% s6 H& o$ X8 V+ g0 `- </html>
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