Created
August 8, 2012 22:04
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Example of EventEmitter
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| var http = require('http') | |
| , util = require('util') | |
| , url = "http://www.thehubway.com/data/stations/bikeStations.xml" | |
| , events = require('events'); | |
| function handleError(e) { | |
| console.error(e.message); | |
| } | |
| function ResponseDataListener(res) { | |
| if (!(this instanceof ResponseDataListener)) { | |
| return new ResponseDataListener(res); | |
| } else { | |
| events.EventEmitter.call(this); // call the super constructor first | |
| this.data; | |
| var self = this; | |
| res.on('data', function(chunk) { | |
| self.addChunk(chunk); | |
| }) | |
| res.on('end', function() { | |
| self.emit('end', self.toString()); | |
| }) | |
| return this; | |
| } | |
| } | |
| util.inherits(ResponseDataListener, events.EventEmitter); | |
| ResponseDataListener.prototype.addChunk = function(chunk) { | |
| this.data += chunk; | |
| } | |
| ResponseDataListener.prototype.toString = function() { | |
| return this.data; | |
| } | |
| http.get(url, function(res) { | |
| ResponseDataListener(res).on('end', function(s) { | |
| console.log("*** markComplete ***"); | |
| }); | |
| res.on('error', handleError); | |
| }).on('error', handleError); |
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