python_day05(去爬登录的豆瓣)

# 爬豆瓣需要用cookie
# 需要注意隐藏的参数，即input 里面的默认的一些参数
# 需要自己注册一个账户密码
import urllib.request
import http.cookiejar
from lxml import etree
import spiderimage
head= {
    'Connection': 'Keep-Alive',
    'Accept': 'text/html, application/xhtml+xml, */*',
    'Accept-Language': 'en-US,en;q=0.8,zh-Hans-CN;q=0.5,zh-Hans;q=0.3',
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko'
}
url='https://accounts.douban.com/login'
# 使用cookie
def makeMyOpener(head):
    cj=http.cookiejar.CookieJar()
    opener=urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))
    header=[]
    for key,value in head.items():
        elem=(key,value)
        header.append(elem)
    opener.addheaders = header
    return opener
oper=makeMyOpener(head)
uop=oper.open(url,timeout=1000)
data=uop.read()
html=data.decode()
# lxml提取
# 提取验证码
selector=etree.HTML(html)
links=selector.xpath('//img[@id="captcha_image"]/@src')
for link in links:
    print(link)
    spiderimage.get_image(link,head,'captcs')
# find hidden value
captcha_ids=selector.xpath('//input[@name="captcha-id"]/@value');
for link in captcha_ids:
    captcha_id=link
captcha=input("请输入验证码：")
print(captcha)
datas = {'source':'index_nav','redir':'https://www.douban.com/','form_email':'此处填写自己的用户名','form_password':'此处填写自己的密码','captcha-solution':captcha,'captcha-id':captcha_id}

data_encoded = urllib.parse.urlencode(datas).encode(encoding='utf-8')
response=oper.open(url,data_encoded)
content = response.read()
html=content.decode();
spath = 'douban.html'
f=open(spath,"w",encoding='utf-8')
f.write(html)
f.close()