Why requests raise this exception "check_hostname requires server_hostname"?

Question

p={
    'http':'http://my correct proxy here',
    'https':'https://my correct proxy here'
    }
self.response=requests.get(url=url,headers=self.headers,timeout=(6,15),proxies=p)

And then it raise the exception:

Traceback (most recent call last):
  File "C:\Users\xyl13509876955\Desktop\Monitor\dicks.py", line 61, in send_request
    self.response=requests.get(url=url,headers=self.headers,timeout=(6,15),proxies=p)
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\requests\api.py", line 76, in get
    return request('get', url, params=params, **kwargs)
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\requests\api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\requests\sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\requests\sessions.py", line 655, in send
    r = adapter.send(request, **kwargs)
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\requests\adapters.py", line 449, in send
    timeout=timeout
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\urllib3\connectionpool.py", line 696, in urlopen
    self._prepare_proxy(conn)
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\urllib3\connectionpool.py", line 964, in _prepare_proxy
    conn.connect()
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\urllib3\connection.py", line 359, in connect
    conn = self._connect_tls_proxy(hostname, conn)
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\urllib3\connection.py", line 506, in _connect_tls_proxy
    ssl_context=ssl_context,
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\urllib3\util\ssl_.py", line 432, in ssl_wrap_socket
    ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls)
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\site-packages\urllib3\util\ssl_.py", line 474, in _ssl_wrap_socket_impl
    return ssl_context.wrap_socket(sock)
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\ssl.py", line 423, in wrap_socket
    session=session
  File "C:\Users\xyl13509876955\AppData\Local\Programs\Python\Python37\lib\ssl.py", line 827, in _create
    raise ValueError("check_hostname requires server_hostname")
ValueError: check_hostname requires server_hostname

Please help me solve the problem and the best way is to show me the right code. I am very confused and frustrated for the problem!!

I get the error just from running `pip3 install --upgrade pip` — S.V, May 27 '21 at 20:01

score 38 · Answer 1 · answered Mar 17 '21 at 08:59

38

as a work around:

pip install urllib3==1.25.11

answered Mar 17 '21 at 08:59

j-hc

485
3
4

@scrubjay55 This actually worked! I spent one day and had almost given up on the SSL error. Tried a lot of solutions but nothing worked.. Relieved finally :) Thank you! How did you find out the fix? – dgor Apr 06 '21 at 13:44
18

Same error when executing "pip install urllib3==1.25.11" ... – wings Apr 30 '21 at 04:08
this worked for me. But I'm keen to properly fix this issue soon. – Theo F Jul 27 '21 at 13:18
1

I had to disable the proxy in Windows settings to be able to downgrade urllib3. Afterwards the issue is gone even with active proxy settings. – mihca Aug 19 '21 at 06:54

Bogdan · Accepted Answer · 2021-08-25T09:11:35.187

29

As I understand, in new urllib3 the main schema of proxy was changed... can read here. This settings help for me (for urllib3=1.26.4).

An old

proxy={
    'http':'8.88.888.8:8888',
    'https':'8.88.888.8:8888'
    }

The new

proxy={
    'https': 'https://8.88.888.8:8888',
    'http': 'http://8.88.888.8:8888',
    }

UPDATED

I have met this issue again for requests 2.26.0, but in this time it works with an old schema...

proxy={
    'http':'8.88.888.8:8888',
    'https':'8.88.888.8:8888'
    }

edited Aug 25 '21 at 09:11

answered Apr 08 '21 at 09:05

Bogdan

498
4
9

This is might be important to some: https://github.com/conda/conda/issues/10590 – nlhnt Jan 05 '22 at 13:26

KEVIN · Answer 3 · 2021-03-17T14:14:36.947

22

I have solved the problem. It is a bug with urllib3.

You can use pip install urllib3==1.25.8

edited Mar 17 '21 at 14:14

answered Mar 17 '21 at 14:05

KEVIN

821
1
4
9

can confirm this worked with python 2.7 and very useful to put in requirements.txt to ensure the version is precise – diaryfolio Sep 02 '21 at 08:09
This solved my problem with python 3.9.6 requests module using proxies, thanks KEVIN – Diego Suarez Feb 09 '22 at 08:43
This solved my problem with python3.10.10 running on MacOS 13.0.1 as well. How on earth has this been a problem for over two years without being fixed? – retsigam Mar 15 '23 at 23:52

score 7 · Answer 4 · answered Apr 04 '21 at 12:11

7

Downgrading urllib3 has solved it for me too. Though I had to reset the proxy env var: https_proxy="http://127.0.0.1:<PROXY_PORT>" pip install urllib3==1.25.11

Without that, I was getting the following error and it couldn't downgrade urllib3 (see SSLError installing with pip).

WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: WRONG_VERSION_NUMBER] wrong version number (_ssl.c:1091)'))': /simple/pip/

answered Apr 04 '21 at 12:11

mikhail

71
2

mee too. What's the value of PROXY_PORT? – Steven Lee Apr 19 '21 at 07:27
Depends on your proxy server. It should be your proxy address (not necessarily 127.0.0.1 as in my case) and the port. – mikhail Apr 26 '21 at 13:16
In my case, changing the value of the https_proxy variable from https to http solved the issue by itself. – shcrela Apr 27 '21 at 13:39

score 6 · Answer 5 · answered Sep 07 '21 at 13:23

6

In my case, Charles' windows proxy function caused this error. After I close windows proxy, this error is gone.

answered Sep 07 '21 at 13:23

Easy One

81
1
5

Similar situation, I turned down my "System Proxy" and the problem solved. – Ian Sep 08 '21 at 03:17

score 5 · Answer 6 · answered Apr 30 '21 at 00:53

5

Had the same problem on Ubuntu 18.04 using Python 3.6.9, searched through a lot of pages and finally fixed it via trial and error.

The fix is changing the environment variable https_proxy. Previously https_proxy is https://127.0.0.1:<PORT> and I removed the https header via:

export https_proxy=127.0.0.1:<PORT>

Then I can do python3 -m pip install --upgrade urllib3.

answered Apr 30 '21 at 00:53

siminsimin

301
2
6

Thanks, this works in windows too, set HTTPS_PROXY=127.0.0.1:3128, then it worked – ah-shiang han Sep 29 '21 at 06:40

Aramis NSR · Answer 7 · 2021-10-18T14:20:18.310

4

None of the answers did it for me. Here's a silly looking solution that fixed my problem:

If you, like me trying to install packages in a corporate environment, you probably have given a proxy to limit interactions with world wide web, so all you have to do is to export that proxy in http and https format.

something like this:

export http_proxy=http://x.x.x.x:8080

export https_proxy=http://x.x.x.x:8080

(my proxy didnt use the ssl, it didnt even matter.)

replace x with your proxy ip

edited Oct 18 '21 at 14:20

answered Oct 10 '21 at 05:07

Aramis NSR

1,602
16
26

1

worked for me thanks a lot man ;) – BugsCreator Nov 16 '21 at 16:16

score 3 · Answer 8 · answered Sep 26 '21 at 17:07

3

Turn Your VPN/Proxy thing (which enables as System Proxy) maybe it fixed.

i was using QV2ray and i had this issue, when i disabled it, pip works fine.

answered Sep 26 '21 at 17:07

Ali Frh

31
1

score 3 · Answer 9 · answered Oct 13 '21 at 11:59

3

Don't use VPN proxy service off it and try again

answered Oct 13 '21 at 11:59

Sithum Batrow

71
7

1

Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Kevin Seymour Oct 13 '21 at 12:21
This has already been mentioned in other answers. *When answering older questions that already have answers, please make sure you provide either a novel solution or a significantly better explanation than existing answers.* – Eric Aya Oct 13 '21 at 12:32
This is the right answer!!! – Vincent Dec 08 '21 at 01:51
Yes but I did not vote – Sithum Batrow Dec 08 '21 at 07:16

score 2 · Answer 10 · answered May 27 '21 at 20:39

2

On Linux, the problem can be resolved by replacing https with http in the proxy settings environment variable export https_proxy=http://123.123.123.123:8888. Note, it is proxy settings for https, but an http address is used.

answered May 27 '21 at 20:39

S.V

2,149
2
18
41

Work for me! But can you explain why? – Corey Nov 09 '21 at 00:12

score 2 · Answer 11 · answered Jul 12 '21 at 06:01

2

I ran into the same issue, the proxy config is enabled by accident. Just turning off the proxy worked for me.

answered Jul 12 '21 at 06:01

Jichao Zhang

436
5
7

I had to turn of the proxy (in Windows settings) to be able to install `urllib3==1.25.11` as suggested in other answers. Otherwise the installation of old urllib3 using pip failed with the same error message. After the installation of old urllib3, the issue is gone even with active proxy settings. – mihca Aug 19 '21 at 06:52

score 2 · Answer 12 · answered Mar 24 '22 at 21:00

2

As others mention, it has something to do with the connection to the server.

I solved it simply by closing Fiddler.

answered Mar 24 '22 at 21:00

Abdullah Gheith

521
6
19

score 1 · Answer 13 · answered Dec 26 '21 at 12:00

1

I got this error when I was using a proxy. I disabled the proxy, the error was fixed.

answered Dec 26 '21 at 12:00

Ebrahim Abdollahian

522
6
16

score 0 · Answer 14 · answered Jul 07 '22 at 08:41

For those of you that can't disable their proxy, I found that downgrading pip was the only thing that worked. The version that works for me is located here: https://pypi.org/project/pip/20.2.4/

Download the whl and use

pip install pip-20.2.4-py2.py3-none-any.whl

at the location you downloaded it to.

score 0 · Answer 15 · edited Oct 14 '22 at 16:16

0

I had the same problem using Python 3.10.7 (64-bit) on Windows 10.

Rolling back urllib3 to 1.25.11 didn't help.

Using python 3.19.13 (64-bit) instead resolved this error message no matter which urllib3 is used.

I assume that this is caused by some compatibility issue with Python 3.10.x.

edited Oct 14 '22 at 16:16

Yunnosch

26,130
9
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answered Oct 14 '22 at 16:13

SaturnIC

17
4

Why requests raise this exception "check_hostname requires server_hostname"?

15 Answers15

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