129 lines
2.1 KiB
JavaScript
129 lines
2.1 KiB
JavaScript
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/**
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* Module dependencies.
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*/
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var EventEmitter = require('events').EventEmitter;
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var parser = require('engine.io-parser');
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var util = require('util');
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var debug = require('debug')('engine:transport');
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/**
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* Expose the constructor.
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*/
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module.exports = Transport;
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/**
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* Noop function.
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*
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* @api private
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*/
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function noop () {}
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/**
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* Transport constructor.
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*
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* @param {http.IncomingMessage} request
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* @api public
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*/
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function Transport (req) {
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this.readyState = 'open';
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this.discarded = false;
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}
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/**
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* Inherits from EventEmitter.
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*/
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util.inherits(Transport, EventEmitter);
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/**
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* Flags the transport as discarded.
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*
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* @api private
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*/
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Transport.prototype.discard = function () {
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this.discarded = true;
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};
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/**
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* Called with an incoming HTTP request.
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*
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* @param {http.IncomingMessage} request
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* @api private
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*/
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Transport.prototype.onRequest = function (req) {
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debug('setting request');
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this.req = req;
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};
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/**
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* Closes the transport.
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*
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* @api private
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*/
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Transport.prototype.close = function (fn) {
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if ('closed' === this.readyState || 'closing' === this.readyState) return;
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this.readyState = 'closing';
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this.doClose(fn || noop);
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};
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/**
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* Called with a transport error.
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*
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* @param {String} message error
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* @param {Object} error description
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* @api private
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*/
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Transport.prototype.onError = function (msg, desc) {
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if (this.listeners('error').length) {
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var err = new Error(msg);
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err.type = 'TransportError';
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err.description = desc;
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this.emit('error', err);
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} else {
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debug('ignored transport error %s (%s)', msg, desc);
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}
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};
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/**
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* Called with parsed out a packets from the data stream.
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*
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* @param {Object} packet
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* @api private
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*/
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Transport.prototype.onPacket = function (packet) {
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this.emit('packet', packet);
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};
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/**
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* Called with the encoded packet data.
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*
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* @param {String} data
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* @api private
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*/
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Transport.prototype.onData = function (data) {
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this.onPacket(parser.decodePacket(data));
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};
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/**
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* Called upon transport close.
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*
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* @api private
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*/
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Transport.prototype.onClose = function () {
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this.readyState = 'closed';
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this.emit('close');
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};
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