如何在Python请求中禁用安全证书检查

Question

我在用

import requests
requests.post(url='https://foo.com', data={'bar':'baz'})

但我收到了request.exceptions.SSLError。该网站的证书已过期，但是我没有发送敏感数据，因此对我来说无关紧要。我可以想象有一个像’verifiy
= False’这样的参数可以使用，但是我似乎找不到。

Answer 1

从文档中：

requests如果设置verify为False，也可以忽略验证SSL证书 。

>>> requests.get('https://kennethreitz.com', verify=False)
<Response [200]>

如果您使用的是第三方模块，并且想禁用检查功能，则可以使用上下文管理器来修补requests和更改它，从而使它verify=False成为默认设置并禁止显示警告。

import warnings
import contextlib

import requests
from urllib3.exceptions import InsecureRequestWarning


old_merge_environment_settings = requests.Session.merge_environment_settings

@contextlib.contextmanager
def no_ssl_verification():
    opened_adapters = set()

    def merge_environment_settings(self, url, proxies, stream, verify, cert):
        # Verification happens only once per connection so we need to close
        # all the opened adapters once we're done. Otherwise, the effects of
        # verify=False persist beyond the end of this context manager.
        opened_adapters.add(self.get_adapter(url))

        settings = old_merge_environment_settings(self, url, proxies, stream, verify, cert)
        settings['verify'] = False

        return settings

    requests.Session.merge_environment_settings = merge_environment_settings

    try:
        with warnings.catch_warnings():
            warnings.simplefilter('ignore', InsecureRequestWarning)
            yield
    finally:
        requests.Session.merge_environment_settings = old_merge_environment_settings

        for adapter in opened_adapters:
            try:
                adapter.close()
            except:
                pass

使用方法如下：

with no_ssl_verification():
    requests.get('https://wrong.host.badssl.com/')
    print('It works')

    requests.get('https://wrong.host.badssl.com/', verify=True)
    print('Even if you try to force it to')

requests.get('https://wrong.host.badssl.com/', verify=False)
print('It resets back')

session = requests.Session()
session.verify = True

with no_ssl_verification():
    session.get('https://wrong.host.badssl.com/', verify=True)
    print('Works even here')

try:
    requests.get('https://wrong.host.badssl.com/')
except requests.exceptions.SSLError:
    print('It breaks')

try:
    session.get('https://wrong.host.badssl.com/')
except requests.exceptions.SSLError:
    print('It breaks here again')

请注意，一旦您离开上下文管理器，此代码将关闭处理已打补丁请求的所有打开的适配器。这是因为请求维护了每个会话的连接池，并且证书验证每个连接仅执行一次，因此将发生以下意外情况：

>>> import requests
>>> session = requests.Session()
>>> session.get('https://wrong.host.badssl.com/', verify=False)
/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py:857: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
  InsecureRequestWarning)
<Response [200]>
>>> session.get('https://wrong.host.badssl.com/', verify=True)
/usr/local/lib/python3.7/site-packages/urllib3/connectionpool.py:857: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
  InsecureRequestWarning)
<Response [200]>