如何在 Python 请求中禁用安全证书检查

Question

I am using

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

but I get a request.exceptions.SSLError. The website has an expired certficate, but I am not sending sensitive data, so it doesn't matter to me. I would imagine there is an argument like 'verifiy=False' that I could use, but I can't seem to find it.

Answer 1

From the documentation :

requests can also ignore verifying the SSL certificate if you set verify to False.

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

If you're using a third-party module and want to disable the checks, here's a context manager that monkey patches requests and changes it so that verify=False is the default and suppresses the warning.

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

Here's how you use it:

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

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

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

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

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

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

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

Note that this code closes all open adapters that handled a patched request once you leave the context manager. This is because requests maintains a per-session connection pool and certificate validation happens only once per connection so unexpected things like this will happen:

>>> import requests
>>> session = requests.Session()
>>> session.get('https://wrong.host.badssl.example/', 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.example/', 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]>

Answer 2

Use requests.packages.urllib3.disable_warnings() and verify=False on requests methods.

import requests
from urllib3.exceptions import InsecureRequestWarning

# Suppress only the single warning from urllib3 needed.
requests.packages.urllib3.disable_warnings(category=InsecureRequestWarning)

# Set `verify=False` on `requests.post`.
requests.post(url='https://example.com', data={'bar':'baz'}, verify=False)

Answer 3

To add to Blender's answer , you can disable SSL certificate validation for all requests using Session.verify = False

import requests

session = requests.Session()
session.verify = False
session.post(url='https://example.com', data={'bar':'baz'})

Note that urllib3 , (which Requests uses), strongly discourages making unverified HTTPS requests and will raise an InsecureRequestWarning .

Answer 4

也可以使用环境变量来完成：

export CURL_CA_BUNDLE=""

Answer 5

If you want to send exactly post request with verify=False option, fastest way is to use this code:

import requests

requests.api.request('post', url, data={'bar':'baz'}, json=None, verify=False)

Answer 6

If you are writing a scraper and really don't care about the SSL certificate you can set it global:

import ssl

ssl._create_default_https_context = ssl._create_unverified_context

DO NOT USE IN PRODUCTION

Answer 7

What has worked for me Due verify=False Bug

Due to a bug on session.verify=False that makes urllib* ignore
that when a environment variable ( CURL_CA_BUNDLE ) is set. So we set it to nothing.

import requests, os
session = requests.Session()
session.verify = False
session.trust_env = False
os.environ['CURL_CA_BUNDLE']="" # or whaever other is interfering with 
session.post(url='https://example.com', data={'bar':'baz'})

Not sure I need trust_env

Answer 8

first import ssl then make a variable like this with three lines of code in your python script file-

ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE

An Example that I have use in html parsing with beautifulsoup was like this -

import urllib.request,urllib.parse,urllib.error

from bs4 import BeautifulSoup
import ssl

ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE


url = input('Enter - ')
html = urllib.request.urlopen(url, context=ctx).read()
soup = BeautifulSoup(html, 'html.parser')

Answer 9

python 3.6+

import warnings
warnings.filterwarnings("ignore", message="Unverified HTTPS request")