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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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。 4 ?/ a4 x* j) ]5 P8 D7 Q
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该套接口对象有四个用来监听套接口事件的回调: - socket.onopen = function(){+ H5 A6 k* | S; A4 w
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- //打开
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- }
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5 \$ s2 }- i/ T/ V. U- socket.onmessage = function(){. y' \: m: C- k- t! e
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- //在event.data消息数据
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, P/ w {9 H" d/ _5 f y @- socket.onclose = function(){7 D8 i1 z) K9 C; A( I
0 p/ |5 k% F) [7 h- //关闭WebSocket$ P# P2 \- D6 `: p
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" p* x8 b4 X b4 D4 i) a) [- socket.onerror = function(){% k! k/ W8 G) J) ~5 c, [- T; t/ H
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- //错误触发
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- }
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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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& b* X4 _; a5 W代码附上: - <!DOCTYPE html>- ~+ X3 F; ?9 |# z+ p
- <html>: R. t$ m" Q% `6 f; G6 k1 w, R
( l6 x3 @5 a5 I+ p2 I8 {% E: n' ]- <head>
H4 Y- d) i8 _9 @. n% ]" w - <meta charset="UTF-8">
3 {# u! D( ?2 G7 O G: g7 H - <meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no" name="viewport">
6 Z/ P7 ~# r3 r7 J) p - <title>WebSocket</title>
# K ^8 E# y- n4 y B0 a5 G - </head>, O2 g4 f- W( ~, W9 D
- ' ]1 ?8 ^' `8 a; L( X
- <body>
/ v9 P, c, F! K3 r: v - </body>
5 q, E, y) [$ S. R - <script>
0 }4 A' m' a8 ^; d M - var socket;' N2 |7 F- j! V+ i2 R9 i4 m
- if (window.WebSocket) {
5 f8 Y3 s' V6 |: i. |4 i1 z& `. C - socket = new WebSocket("ws://localhost:8080/myapp");7 F6 w! l8 m" @/ U, Z
- socket.onmessage = function(event) {* T9 M0 i0 s$ b8 s+ q. [5 f( Z
- alert("Received data from websocket: " + event.data); M6 |5 G+ d; I
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- socket.onopen = function(event) {' z+ l2 I4 C; M/ f% d& a, @
- alert("Web Socket opened!");% C Q1 y/ H. D0 p( b
- };
% ~7 [3 h, B7 A$ z - socket.onclose = function(event) {7 C5 b2 }) r4 m' P) @) m
- alert("Web Socket closed.");, W- |) E% |0 ]) J# |
- };! \ R$ a$ h% t4 Z1 [
- } else {; [8 o1 `' o, e2 N' l9 X6 Y
- alert("Your browser does not support Websockets. (Use Chrome)");+ ?$ _' C2 F Y6 b/ m% H
- }
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, n7 P" z% X. y% F4 l1 ^& C- function send(message) {* e! P* w/ m7 I: u
- if (!window.WebSocket) {
2 b# g( e" N5 d( t+ p' v$ g - return;
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: k" H7 r/ Q6 D; L4 c - if (socket.readyState == WebSocket.OPEN) {6 I( _$ }& s) k" w
- socket.send(message);
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- }
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( \( f4 B) j1 x5 a% g* U3 `9 _# k- </html>
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