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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# U( m8 F3 \3 J6 z/ }9 t2 Q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。 $ Q7 \7 S/ j; E8 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(){
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- //打开
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- socket.onmessage = function(){! E8 T* ~& T% d8 a0 m
; @( W7 c. B$ n8 N$ ` r5 A7 G- //在event.data消息数据" I% n. u d( ^" J
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- socket.onclose = function(){8 a1 [8 U+ r/ N# y. r4 N
; F+ ^, |- @; p1 o* i; d) Q- //关闭WebSocket& `, `7 U) P. c* t& O/ v
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- socket.onerror = function(){
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7 c# |7 p" Q6 J# P" x& s7 K- //错误触发" }+ N" f/ n& W; `8 S" s; ]
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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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代码附上: - <!DOCTYPE html>( w4 O# |+ c' |
- <html>
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- <head>
6 L& C9 y" \% `4 L4 }: m! d; x - <meta charset="UTF-8">7 f& b5 @! S7 s
- <meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0,user-scalable=no" name="viewport">2 t- `1 q' a1 H N# R' g
- <title>WebSocket</title>6 A3 u) a$ d0 z
- </head>
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2 z; [6 ?9 c" M: z$ Z6 w- <body>! z$ S- y/ a S( x+ O( t! P. E4 K
- </body># S/ r/ z/ M0 ^ A; ], `; g; y
- <script>
$ V9 R6 }8 T+ o3 y" D - var socket;5 ]; z$ Y' P8 @2 A2 _5 Q& E* ^
- if (window.WebSocket) {; G4 k' n* s7 c5 c
- socket = new WebSocket("ws://localhost:8080/myapp");$ q+ c: { ^, j2 Q3 [
- socket.onmessage = function(event) {
+ @& ]& ^ e, F6 E2 g) t) k! q7 T3 m - alert("Received data from websocket: " + event.data);( k7 A! Y2 I8 a$ ~6 y) G
- }
; Z6 s9 n) Z2 l8 Y6 G - socket.onopen = function(event) {
6 j2 o+ K% W' c X/ w - alert("Web Socket opened!");
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- socket.onclose = function(event) {" d5 v- S5 O* k0 e8 W# K
- alert("Web Socket closed.");
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- } else {! ^9 R2 N* y0 k- c- h, ]3 L. q8 C
- alert("Your browser does not support Websockets. (Use Chrome)");5 Y3 o) v9 _0 z* E. u/ H
- }
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$ D$ N6 _) x6 O7 } S5 q: V$ [ B- function send(message) {
$ u) X9 ` e& K) R: y - if (!window.WebSocket) {
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D1 c6 a7 z5 r- D, y8 O - if (socket.readyState == WebSocket.OPEN) {
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- } else {9 T, D9 K# ?) g: T% v/ @7 `8 s2 G
- alert("The socket is not open.");/ `4 p" T6 d" ?$ o
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- </script>5 q! M4 p2 \+ N2 t
2 k; Y& A9 Z" \6 v; [0 b- </html>
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