79 lines
2.2 KiB
JavaScript
79 lines
2.2 KiB
JavaScript
/*
|
|
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 websocket.js
|
|
* @authors:
|
|
* Jeffrey Wilcke <jeff@ethdev.com>
|
|
* Marek Kotewicz <marek@ethdev.com>
|
|
* Marian Oancea <marian@ethdev.com>
|
|
* @date 2014
|
|
*/
|
|
|
|
// TODO: is these line is supposed to be here?
|
|
if (process.env.NODE_ENV !== 'build') {
|
|
var WebSocket = require('ws'); // jshint ignore:line
|
|
}
|
|
|
|
var WebSocketProvider = function(host) {
|
|
// onmessage handlers
|
|
this.handlers = [];
|
|
// queue will be filled with messages if send is invoked before the ws is ready
|
|
this.queued = [];
|
|
this.ready = false;
|
|
|
|
this.ws = new WebSocket(host);
|
|
|
|
var self = this;
|
|
this.ws.onmessage = function(event) {
|
|
for(var i = 0; i < self.handlers.length; i++) {
|
|
self.handlers[i].call(self, JSON.parse(event.data), event);
|
|
}
|
|
};
|
|
|
|
this.ws.onopen = function() {
|
|
self.ready = true;
|
|
|
|
for(var i = 0; i < self.queued.length; i++) {
|
|
// Resend
|
|
self.send(self.queued[i]);
|
|
}
|
|
};
|
|
};
|
|
|
|
WebSocketProvider.prototype.send = function(payload) {
|
|
if(this.ready) {
|
|
var data = JSON.stringify(payload);
|
|
|
|
this.ws.send(data);
|
|
} else {
|
|
this.queued.push(payload);
|
|
}
|
|
};
|
|
|
|
WebSocketProvider.prototype.onMessage = function(handler) {
|
|
this.handlers.push(handler);
|
|
};
|
|
|
|
WebSocketProvider.prototype.unload = function() {
|
|
this.ws.close();
|
|
};
|
|
Object.defineProperty(WebSocketProvider.prototype, "onmessage", {
|
|
set: function(provider) { this.onMessage(provider); }
|
|
});
|
|
|
|
if (typeof(module) !== "undefined")
|
|
module.exports = WebSocketProvider;
|