python - Cookie 政策被忽略？

Question

我正在尝试使用 requests.Session提出一些请求，但我不希望设置 cookie。正在查看this question ，看来我可以创建一个 cookie 策略，并根据该策略创建一个 cookie jar 来忽略 cookie。然而，对于我的请求，cookie 似乎仍然被设置:

from http import cookiejar

class BlockAll(cookiejar.CookiePolicy):
        """ Blocks all cookies for a given request.
        """
        return_ok = set_ok = domain_return_ok = path_return_ok = lambda self, *args, **kwargs: False
        netscape = True
        rfc2965 = hide_cookie2 = False


def get_cookie_jar():
    cookies = cookiejar.CookieJar(policy=BlockAll())
    return cookies

session = requests.Session()
response = session.request(
   method='post',
   url='some_url.com',
   cookies=get_cookie_jar(),
   ....
)

print(response.cookies)
<RequestsCookieJar[Cookie(version=0, name='JSESSIONID', value='1234', port=None, port_specified=False, domain='some_url.com', domain_specified=False, domain_initial_dot=False, path='/', path_specified=True, secure=False, expires=None, discard=True, comment=None, comment_url=None, rest={}, rfc2109=False)]>

这是为此类请求设置策略的正确方法吗？任何帮助/相关文档的链接将不胜感激。

Answer 1

request(...) 的 cookies 参数允许您在请求上指定传出 cookie。 响应中的传入 cookie 不会被咨询。

您需要在 session 上设置策略:

session = requests.Session()
session.cookies.set_policy(BlockAll())

演示:

>>> session = requests.Session()
>>> response = session.request('GET', 'http://httpbin.org/cookies/set?foo=bar')
>>> session.cookies  # no policy, so cookie got set
<RequestsCookieJar[Cookie(version=0, name='foo', value='bar', port=None, port_specified=False, domain='httpbin.org', domain_specified=False, domain_initial_dot=False, path='/', path_specified=True, secure=False, expires=None, discard=True, comment=None, comment_url=None, rest={}, rfc2109=False)]>
>>> session.cookies.clear()  # clean slate, no cookies
>>> session.cookies
<RequestsCookieJar[]>
>>> session.cookies.set_policy(BlockAll())
>>> response = session.request('GET', 'http://httpbin.org/cookies/set?foo=bar')
>>> session.cookies  # with policy, cookies still empty
<RequestsCookieJar[]>