爬虫5 html下载器 html_downloader.py

#coding:utf8
import urllib2

__author__ = 'wang'

class HtmlDownloader(object):
    def download(self, url):
        if url is None:
            return None

        response = urllib2.urlopen(url)

        if response.getcode() != 200:
            return None

        return response.read()