mirror of
https://github.com/warmcat/libwebsockets.git
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91 lines
1.8 KiB
HTML
91 lines
1.8 KiB
HTML
<meta charset="UTF-8">
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<html>
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<body>
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<img src="libwebsockets.org-logo.png"><br>
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<b>Minimal ws server proxy example</b>.<br>
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The server makes a dumb-increment-protocol wss connection<br>
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to libwebsockets.org. It proxies what it was sent to<br>
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all browsers open on this page.<br>
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The textarea show the last 20 lines received.
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<br>
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<br>
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<textarea id=r readonly cols=40 rows=20></textarea><br>
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</body>
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<script>
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var head = 0, tail = 0, ring = new Array();
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function get_appropriate_ws_url(extra_url)
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{
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var pcol;
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var u = document.URL;
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/*
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* We open the websocket encrypted if this page came on an
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* https:// url itself, otherwise unencrypted
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*/
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if (u.substring(0, 5) == "https") {
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pcol = "wss://";
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u = u.substr(8);
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} else {
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pcol = "ws://";
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if (u.substring(0, 4) == "http")
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u = u.substr(7);
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}
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u = u.split('/');
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/* + "/xxx" bit is for IE10 workaround */
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return pcol + u[0] + "/" + extra_url;
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}
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function new_ws(urlpath, protocol)
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{
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if (typeof MozWebSocket != "undefined")
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return new MozWebSocket(urlpath, protocol);
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return new WebSocket(urlpath, protocol);
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}
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ws = new_ws(get_appropriate_ws_url(""), "lws-minimal-proxy");
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try {
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ws.onopen = function() {
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document.getElementById("m").disabled = 0;
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document.getElementById("b").disabled = 0;
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}
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ws.onmessage =function got_packet(msg) {
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var n, s = "";
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ring[head] = msg.data + "\n";
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head = (head + 1) % 20;
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if (tail == head)
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tail = (tail + 1) % 20;
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n = tail;
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do {
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s = s + ring[n];
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n = (n + 1) % 20;
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} while (n != head);
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document.getElementById("r").value = s;
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document.getElementById("r").scrollTop =
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document.getElementById("r").scrollHeight;
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}
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ws.onclose = function(){
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document.getElementById("m").disabled = 1;
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document.getElementById("b").disabled = 1;
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}
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} catch(exception) {
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alert('<p>Error' + exception);
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}
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</script>
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</html>
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