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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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( Y) a/ Q5 |2 J( ^, K$ ?) e: m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。 % `. V' U0 O# T0 b1 T- e6 j+ [3 K
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1 g( O2 v, j6 k该套接口对象有四个用来监听套接口事件的回调: - socket.onopen = function(){! a$ [$ i/ D! b$ Z
$ l* s; R7 E0 D* [& ]$ `6 c. n- //打开
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- b1 a `. N3 g' E- socket.onmessage = function(){4 `$ w# G; K# Y2 b
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- //在event.data消息数据
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- socket.onclose = function(){
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- //关闭WebSocket& l( b9 q2 J, e! j5 t9 t
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- }
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, d- ?; T. F# t7 E- U! K& j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>, i- ]; F& }3 Z0 c$ P
- <html>
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- <head>' r/ C+ @6 H3 f) ^8 e5 C
- <meta charset="UTF-8">
5 d% u0 U" g: c6 i$ P1 Z0 [ - <meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no" name="viewport">: X9 r! Y- ?/ z4 G( Z% j E
- <title>WebSocket</title> F0 C0 w4 f% f6 e) S! R
- </head>7 d8 T+ ~6 C2 O% }/ ^' O8 V+ N5 Y& Z
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- </body>
, i. _8 P# C( W7 N8 G+ X5 o- ` - <script>
# E' j: w: l# q3 d# j; {& ^4 S - var socket;( B$ x1 _" G6 `- y
- if (window.WebSocket) {
/ K' x- y1 _2 O* H4 x1 |- J- \ - socket = new WebSocket("ws://localhost:8080/myapp");
# H+ T$ C) C! v8 T - socket.onmessage = function(event) {
& H' ?" V { M/ b - alert("Received data from websocket: " + event.data);* T+ [- X* p0 `$ ?& l+ x! T
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- socket.onopen = function(event) {
& K9 O/ h) X6 ~ - alert("Web Socket opened!");
8 F. M" f+ u4 R' @9 v2 L - };
3 G- ?2 ^& h6 y6 j3 d - socket.onclose = function(event) {0 g ?# h7 C$ Z1 f, t0 C
- alert("Web Socket closed.");
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- } else {1 j3 e2 M% J) c7 z0 H& K3 U5 O1 h
- alert("Your browser does not support Websockets. (Use Chrome)");, {6 M" l: G% V' i( v6 v
- }
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' P3 Z! C i$ N7 O8 |4 r- function send(message) {
: Z& s' l! A3 A, I9 C9 j - if (!window.WebSocket) {4 {+ f% A+ Y4 X4 Y1 ]3 w) t) c3 I
- return;3 a' E$ z0 R. t) N/ s6 _
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- if (socket.readyState == WebSocket.OPEN) {7 J2 E( w7 Z5 ~( d$ Q1 \ Y
- socket.send(message);0 Y. t% b' R2 l1 L8 D
- } else {# I$ ]" V2 m' K9 U/ D5 G
- alert("The socket is not open.");
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- </script>6 U: A# t6 J/ }. R# b8 g
$ N, L# H$ a; ]- </html>
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