[python爬虫]第二次的尝试：利用py爬虫来登陆知乎

这次按照的是 www.yiibai.com/python(小写)/python3-webbug-series4.html 的教程来写的，在原有代码的基础上稍微做了改动，体验了一把装逼的感觉，因为我测试用的知乎帐号是手机号注册的，所以代码上会有些出入

#encoding utf-8

__author__ = 'qiao'

import gzip
import re
import http.cookiejar
import urllib.request
import urllib.parse

def get_opener(head):

	cj = http.cookiejar.CookieJar()
	pro = urllib.request.HTTPCookieProcessor(cj)
	opener = urllib.request.build_opener(pro)
	header = []
	for key, value in head.items():
		elem = (key,value)
		header.append(elem)
	opener.addheaders = header
	return opener

def ungzip(data):
	try:
		print('Decompressing')
		data = gzip.decompress(data)
		print('Data decompression finished')
	except:
		print('It doesn\'t need decompress')
	return data

def get_xsrf(data):
	cer = re.compile('name=\"_xsrf\" value=\"(.*)\"',flags = 0)
	strlist = cer.findall(data)
	return strlist[0]

# test code
header = {
	'Connection': 'Keep-Alive',
	'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*',
	'Accept-Language': 'en-US,en;q=0.5',
	'Accept-Encoding': 'gzip, deflate',
	'Host': 'www.zhihu.com',
	'DNT':'1'
}

url = 'http://www.zhihu.com/'
opener = get_opener(header)
op = opener.open(url)
data = op.read()
data = ungzip(data)
_xsrf = get_xsrf(data.decode())

url += '/login/phone_num'
id = '你的帐号'
password = '你的密码'
post_dict = {
	'_xsrf':_xsrf,
	'phone_num':id,
	'password': password,
	'rememberme':'true',
	'captcha':''
}

post_data = urllib.parse.urlencode(post_dict).encode()
op = opener.open(url,post_data)
data = op.read()
data = ungzip(data)

print(data.decode())
print('Login Success')

程序运行后的输出是：

Decompressing
It doesn't need decompress
Decompressing
It doesn't need decompress
{"r":0,
 "msg": "\u767b\u5f55\u6210\u529f"
}
Login Success

其中\u767b\u5f55\u6210\u529f 是unicode编码，转换成中文就是“登录成功”

感觉还不错，接下来要在原理的层面上再深入理解爬虫，装高级一点的逼