/*
* Cettia
* http://cettia.io/projects/cettia-protocol/
*
* Copyright 2015 The Cettia Project
* Licensed under the Apache License, Version 2.0
* http://www.apache.org/licenses/LICENSE-2.0
*/
var events = require("events");/*
* Cettia
* http://cettia.io/projects/cettia-protocol/
*
* Copyright 2015 The Cettia Project
* Licensed under the Apache License, Version 2.0
* http://www.apache.org/licenses/LICENSE-2.0
*/
var events = require("events");It creates a base transport.
module.exports = function(uri, options) {A transport timeout in ms. It applies when a transport starts connection.
var timeout = options && options.timeout || 3000;A transport object.
var self = new events.EventEmitter();
self.open = function() {Establishes the real connection. `connect should be implemented by others.
self.connect(uri, options);Sets a timeout timer.
var timeoutTimer = setTimeout(function() {Fires a timeout error.
self.emit("error", new Error("timeout"));close should ensure that close event is fired.
self.close();
}, timeout);If it establishes a connection, cancels the timer.
self.on("open", function() {
clearTimeout(timeoutTimer);
});If it fails to establish a connection before the timer expires, cancels the timer.
self.on("close", function() {
clearTimeout(timeoutTimer);
});
return this;
};A flag to check the transport is opened.
self.opened = false;
self.on("open", function() {
self.opened = true;
});
self.on("close", function() {
self.opened = false;
});
self.send = function(data) {Allows to send data only it is opened. If not, fires an error.
if (self.opened) {
self.write(data);
} else {
self.emit("error", new Error("notopened"));
}
return this;
};
return self;
};