import?urllib2

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（）

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-10-06?15:17??python爬蟲\
?????文件?????????272??2017-10-05?00:22??python爬蟲\html_downloader.py
?????文件?????????678??2017-10-05?00:22??python爬蟲\html_downloader.pyc
?????文件?????????784??2017-10-06?11:28??python爬蟲\html_outputer.py
?????文件????????1371??2017-10-06?11:28??python爬蟲\html_outputer.pyc
?????文件????????1235??2017-10-06?11:48??python爬蟲\html_parser.py
?????文件????????1714??2017-10-06?11:49??python爬蟲\html_parser.pyc
?????文件????????1173??2017-10-06?11:54??python爬蟲\Main.py
?????文件??????475449??2017-10-06?12:06??python爬蟲\output.html
?????文件?????????724??2017-10-04?23:52??python爬蟲\url_manager.py
?????文件????????1497??2017-10-04?23:53??python爬蟲\url_manager.pyc