You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
102 lines
2.9 KiB
102 lines
2.9 KiB
/*
|
|
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;
|
|
|