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Diffstat (limited to 'lib/autoprovider.js')
-rw-r--r-- | lib/autoprovider.js | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/lib/autoprovider.js b/lib/autoprovider.js deleted file mode 100644 index 0501b93d8..000000000 --- a/lib/autoprovider.js +++ /dev/null @@ -1,114 +0,0 @@ -/* - 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 - */ - -var web3 = require('./web3'); // jshint ignore:line -if (process.env.NODE_ENV !== 'build') { - var WebSocket = require('ws'); // jshint ignore:line -} - -/** - * AutoProvider object prototype is implementing 'provider protocol' - * Automatically tries to setup correct provider(Qt, WebSockets or HttpRpc) - * First it checkes if we are ethereum browser (if navigator.qt object is available) - * if yes, we are using QtProvider - * if no, we check if it is possible to establish websockets connection with ethereum (ws://localhost:40404/eth is default) - * if it's not possible, we are using httprpc provider (http://localhost:8080) - * The constructor allows you to specify uris on which we are trying to connect over http or websockets - * You can do that by passing objects with fields httrpc and websockets - */ -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.send(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); - }; -}; - -/// Sends message forward to the provider, that is being used -/// if provider is not yet set, enqueues the message -AutoProvider.prototype.send = function (payload) { - if (this.provider) { - this.provider.send(payload); - return; - } - this.sendQueue.push(payload); -}; - -/// On incoming message sends the message to the provider that is currently being used -Object.defineProperty(AutoProvider.prototype, 'onmessage', { - set: function (handler) { - if (this.provider) { - this.provider.onmessage = handler; - return; - } - this.onmessageQueue.push(handler); - } -}); - -module.exports = AutoProvider; |