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    python如何获取cookie

    (*-*)浩(*-*)浩2019-08-29 09:57:02原创10819

    介绍下3种python获取cookie的方法。

    (1)借助handler

    这种方法也是网上介绍最多的一种方法,但是用起来比较麻烦

    from http import cookiejar
    from urllib import request
    
    class Craw():
        def __init__(self):
            self.url = ''
            self.headers['User-Agent'] = 'Mozilla/5.0 (Windows NT 6.3; Win64; x64) ' \
                                         'AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.162 Safari/537.36'
            self.headers['Content-Type'] = 'application/x-www-form-urlencoded'
    
        def getCookies(self):
            cookie = cookiejar.CookieJar()
            handler = request.HTTPCookieProcessor(cookie)
            opener = request.build_opener(handler)
            response = opener.open(self.url)
            cookieValue = ''
            for item in cookie:
                cookieValue += item.name + '=' + item.value + ';'
            self.headers['Cookie'] = cookieValue
            response = requests.get(url=self.url)
     
        def getVerificationCode(self):
         img_url = ''
            imgResponse = requests.get(url=img_url,headers = self.headers) #直接使用headers即可
            base64_jpg = base64.b64encode(imgResponse.content)
            return base64_jpg

    (2)使用response headers的set_cookie

    import requests
    import re
    class Crawler():
       def getCookie(self):
         response = requests.post(self.url)
        set_cookie = response.headers['Set-Cookie']
        array = re.split('[;,]',set_cookie)
        cookieValue = ''
        for arr in array:
          if arr.find('DZSW_SESSIONID') >= 0 or arr.find('bl0gm1HBTB') >= 0:
            cookieValue += arr + ';'

    (3)使用response的cookies属性获取

    只写getCookies方法,代码如下:

    import requests    
    class Crawler():
        def getCookie(self):
            response = requests.get(self.url)
            cookie_value = ''
            for key,value in response.cookies.items():  
                cookie_value += key + '=' + value + ';'  
            self.headers['Cookie'] = cookie_value
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