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82 lines
2.5 KiB
JavaScript
82 lines
2.5 KiB
JavaScript
/* vim: ts=4:sw=4:expandtab
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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;(function(){
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'use strict';
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/*
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* var socket = textsecure.websocket(url);
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*
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* Returns an adamantium-reinforced super socket, capable of sending
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* app-level keep alives and automatically reconnecting.
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*
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*/
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window.textsecure.websocket = function (url) {
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var socketWrapper = {
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onmessage : function() {},
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ondisconnect : function() {},
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};
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var socket;
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var keepAliveTimer;
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var reconnectSemaphore = 0;
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var reconnectTimeout = 1000;
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function resetKeepAliveTimer() {
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clearTimeout(keepAliveTimer);
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keepAliveTimer = setTimeout(function() {
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socket.send(
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new textsecure.protobuf.WebSocketMessage({
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type: textsecure.protobuf.WebSocketMessage.Type.REQUEST,
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request: { verb: 'GET', path: '/v1/keepalive' }
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}).encode().toArrayBuffer()
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);
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resetKeepAliveTimer();
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}, 15000);
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};
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function reconnect(e) {
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reconnectSemaphore--;
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setTimeout(connect, reconnectTimeout);
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socketWrapper.ondisconnect(e);
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};
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function connect() {
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clearTimeout(keepAliveTimer);
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if (++reconnectSemaphore <= 0) { return; }
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if (socket) { socket.close(); }
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socket = new WebSocket(url);
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socket.onerror = reconnect;
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socket.onclose = reconnect;
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socket.onopen = resetKeepAliveTimer;
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socket.onmessage = function(response) {
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socketWrapper.onmessage(response);
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resetKeepAliveTimer();
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};
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socketWrapper.send = function(msg) {
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socket.send(msg);
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}
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}
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connect();
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return socketWrapper;
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};
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})();
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