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authorobscuren <geffobscura@gmail.com>2015-01-09 20:00:37 +0800
committerobscuren <geffobscura@gmail.com>2015-01-09 20:00:37 +0800
commitaee82d3196711f0dc46a625e31dc3a642e4e889b (patch)
tree7a676d161ac1eae5c660f73717ae67ad25c5a940 /cmd/mist/assets/ext/ethereum.js/lib/autoprovider.js
parent012a1c25331385aceb94af2a9829a2c6811d31b7 (diff)
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-/*
- This file is part of ethereum.js.
-
- ethereum.js is free software: you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- ethereum.js is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with ethereum.js. If not, see <http://www.gnu.org/licenses/>.
-*/
-/** @file autoprovider.js
- * @authors:
- * Marek Kotewicz <marek@ethdev.com>
- * Marian Oancea <marian@ethdev.com>
- * @date 2014
- */
-
-/*
- * @brief if qt object is available, uses QtProvider,
- * if not tries to connect over websockets
- * if it fails, it uses HttpRpcProvider
- */
-
-// TODO: is these line is supposed to be here?
-if (process.env.NODE_ENV !== 'build') {
- var WebSocket = require('ws'); // jshint ignore:line
- var web3 = require('./web3'); // jshint ignore:line
-}
-
-var AutoProvider = function (userOptions) {
- if (web3.haveProvider()) {
- return;
- }
-
- // before we determine what provider we are, we have to cache request
- this.sendQueue = [];
- this.onmessageQueue = [];
-
- if (navigator.qt) {
- this.provider = new web3.providers.QtProvider();
- return;
- }
-
- userOptions = userOptions || {};
- var options = {
- httprpc: userOptions.httprpc || 'http://localhost:8080',
- websockets: userOptions.websockets || 'ws://localhost:40404/eth'
- };
-
- var self = this;
- var closeWithSuccess = function (success) {
- ws.close();
- if (success) {
- self.provider = new web3.providers.WebSocketProvider(options.websockets);
- } else {
- self.provider = new web3.providers.HttpRpcProvider(options.httprpc);
- self.poll = self.provider.poll.bind(self.provider);
- }
- self.sendQueue.forEach(function (payload) {
- self.provider(payload);
- });
- self.onmessageQueue.forEach(function (handler) {
- self.provider.onmessage = handler;
- });
- };
-
- var ws = new WebSocket(options.websockets);
-
- ws.onopen = function() {
- closeWithSuccess(true);
- };
-
- ws.onerror = function() {
- closeWithSuccess(false);
- };
-};
-
-AutoProvider.prototype.send = function (payload) {
- if (this.provider) {
- this.provider.send(payload);
- return;
- }
- this.sendQueue.push(payload);
-};
-
-Object.defineProperty(AutoProvider.prototype, 'onmessage', {
- set: function (handler) {
- if (this.provider) {
- this.provider.onmessage = handler;
- return;
- }
- this.onmessageQueue.push(handler);
- }
-});
-
-module.exports = AutoProvider;