mirror of
https://libwebsockets.org/repo/libwebsockets
synced 2024-12-26 15:18:15 +00:00
69 lines
1.3 KiB
JavaScript
69 lines
1.3 KiB
JavaScript
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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return new WebSocket(urlpath, protocol);
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}
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document.addEventListener("DOMContentLoaded", function() {
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var ws = new_ws(get_appropriate_ws_url(""), "lws-minimal");
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try {
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ws.onopen = function() {
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document.getElementById("r").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) % 50;
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if (tail === head)
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tail = (tail + 1) % 50;
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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) % 50;
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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("r").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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}, false);
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