python 爬虫 | 检查网站情况
这里的笔记来源于对《用python写网络爬虫》的总结，写作以记录。 版本：python2.7
1、网站大小估计 在谷歌或百度中输入site:域名 例如
显示这个网站有1亿0720万个网页。
2、识别网站所用的技术 在爬去网站之前，了解网站使用的技术，会对爬去数据有一定的印象。这里使用builtwith模块来探测网上搭建的技术。
import builtwith
builtwith.parse("http://www.jianshu.com")结果： {u’javascript-frameworks’: [u’Prototype’, u’RequireJS’], u’programming-languages’: [u’Ruby’], u’web-frameworks’: [u’Twitter Bootstrap’, u’Ruby on Rails’]}
3、查看网站的拥有者 采用python-whois包，需要下载。
pip install python-whois查看所有者
import whois
print(whois.whois("http://www.jianshu.com"))结果： { “updated_date”: [ “2016-04-06 00:00:00”, “2016-04-06 10:24:47” ], “status”: [ “clientTransferProhibited https://icann.org/epp#clientTransferProhibited“, “clientTransferProhibited https://www.icann.org/epp#clientTransferProhibited” ], “name”: “Shanghai Bai Ji Information Technology Inc. Ltd,”, “dnssec”: “unSigned”, “city”: “Shanghai”, “expiration_date”: [ “2020-03-20 00:00:00”, “2020-03-20 18:28:58” ], “zipcode”: “200433”, “domain_name”: “JIANSHU.COM”, “country”: “CN”, “whois_server”: “whois.name.com”, “state”: “Shanghai”, “registrar”: “Name.com, Inc.”, “referral_url”: “http://www.name.com“, “address”: “Innospace 2, B1, Building #5, KIC, No.316 Songhu Road , Yangpu District”, “name_servers”: [ “F1G1NS1.DNSPOD.NET”, “F1G1NS2.DNSPOD.NET”, “f1g1ns1.dnspod.net”, “f1g1ns2.dnspod.net” ], “org”: “Shanghai Bai Ji Information Technology Inc. Ltd,”, “creation_date”: [ “2008-03-20 00:00:00”, “2008-03-20 18:28:58” ], “emails”: [ “contact@jianshu.com”, “abuse@name.com” ] } In [ ]: