CoffeeScriptで書きなおしたnode.jsの標準モジュールを使ったサンプルクローラー

crawl.coffee

class Crawler
	fs = require 'fs'
	sys = require 'sys'
	http = require 'http'
	url = require 'url'

	constructor: ->
	crawl:(list) ->
		self = this
		self.fetch u for u in list
		
	fetch:(targetUrl)	->

		parsedUrl = url.parse(targetUrl)
		client = http.createClient(80,parsedUrl.hostname)
		request = client.request('GET',parsedUrl.pathname,'host':parsedUrl.hostname)
		request.end()

		request.on('response',(response)->
			body = ''
			response.on('end',->
				console.log(targetUrl + " - " + response.statusCode)
			)
		)
	readFile:(path) ->
		self = this
		fs.readFile(path, (err,data) ->
			console.log 'start'
			if err
				console.error "List file is not exists"
				process.exit(1)
			list = eval('(' + data + ')')
			self.crawl(list)
		)
module.exports = Crawler

main.coffee

Crawler = require 'crawler'
c = new Crawler()
listPath = process.argv[2]
c.readFile(listPath)