Python requests.exceptions.SSLError: EOF occurred in violation of protocol

I would retrieve some information from an ABB G13 gateway that offer a RESTful JSON API. API is hosted by the gateway via https endpoint. Basic authentication mechanism is used for authentication. However all traffic goes through SSL layers.

On linux with command:

curl -s -k -X GET -u user:password 

All goes well!

I'm trying to write a script for windows in Python 2.7.10 with Requests 2.8.1 and with this code:

import requests requests.get(' auth=('user', 'password')) 

I have this error:

Traceback (most recent call last): File "C:/Users/mzilio/PycharmProjects/pwrgtw/test.py", line 20, in <module> requests.get(' auth=('user', 'password')) File "C:\Python27\lib\site-packages\requests\api.py", line 69, in get return request('get', url, params=params, **kwargs) File "C:\Python27\lib\site-packages\requests\api.py", line 50, in request response = session.request(method=method, url=url, **kwargs) File "C:\Python27\lib\site-packages\requests\sessions.py", line 468, in request resp = self.send(prep, **send_kwargs) File "C:\Python27\lib\site-packages\requests\sessions.py", line 576, in send r = adapter.send(request, **kwargs) File "C:\Python27\lib\site-packages\requests\adapters.py", line 433, in send raise SSLError(e, request=request) requests.exceptions.SSLError: EOF occurred in violation of protocol (_ssl.c:590) 

I've searched for a solution and I've tried to fix with this code:

import requests from requests.adapters import HTTPAdapter from requests.packages.urllib3.poolmanager import PoolManager import ssl class MyAdapter(HTTPAdapter): def init_poolmanager(self, connections, maxsize, block=False): self.poolmanager = PoolManager(num_pools=connections, maxsize=maxsize, block=block, ssl_version=ssl.PROTOCOL_TLSv1) s = requests.Session() s.mount(' MyAdapter()) s.get(') 

But it doesn't work for me cause I get this error:

Traceback (most recent call last): File "C:/Users/mzilio/PycharmProjects/pwrgtw/test.py", line 16, in <module> s.get(') File "C:\Python27\lib\site-packages\requests\sessions.py", line 480, in get return self.request('GET', url, **kwargs) File "C:\Python27\lib\site-packages\requests\sessions.py", line 468, in request resp = self.send(prep, **send_kwargs) File "C:\Python27\lib\site-packages\requests\sessions.py", line 576, in send r = adapter.send(request, **kwargs) File "C:\Python27\lib\site-packages\requests\adapters.py", line 433, in send raise SSLError(e, request=request) requests.exceptions.SSLError: EOF occurred in violation of protocol (_ssl.c:590) 

I'm stuck on this problem. Could someone help me? Thanks!

8 Answers

This thing worked for me, just make sure whether these modules are installed or not, if not then install them, following are:

pip install ndg-httpsclient pip install pyopenssl pip install pyasn1 

It removed my SSLError: EOF occurred in violation of protocol (_ssl.c:590) error.

Hope it helps.

I found it was going through a proxy when it should have connected to the server directly.

I fixed this by doing

unset https_proxy 

Step 1: Check that Python supports TLS 1.1

You may have a Python setup that only supports TLS 1.0 – not TLS 1.1 or above.

You can check it like this:

Python 3

from urllib.request import urlopen urlopen(').read() 

Python 2

from urllib2 import urlopen urlopen(').read() 

(If you get urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:852)> you may have to disable certificate verification. NOTE: doing this will disable SSL protections against evildoers who would impersonate or intercept traffic to that website - see )

import ssl urlopen(' context=ssl._create_unverified_context()).read() 

Check the output for the key tls_version. If it says TLS 1.0 and not TLS 1.1 or TLS 1.2 that could be the problem.

If you're using a virtualenv, be sure to run the command inside.

Step 2: Install Python with a newer version of OpenSSL

In order support TLS 1.1 or above, you may need to install a newer version of OpenSSL, and the install Python again afterwards. This should give you a Python that supports TLS 1.1.

The process depends on your operating system – here's a guide for OS X.

virtualenv users
For me, the Python outside of my virtualenv had TLS 1.2 support, so just I removed my old virtualenv, and created a new one with the same packages and then it worked. Easy peasy!

I had exactly the same error, turns out that I didn't have ndg-httpsclient installed, see my original issue raised in github.

If you are getting this error for intermediate requests, you can refer to the solution mentioned in .

Basically, if you are making a lot of requests to a server and facing this issue with some of those requests you can use Session to just retry the requests.

Let me know if this works.

The only time I have seen errors of this nature have been times that I was using requests to screen scrape data and I was using a multiprocessing library. I would either try your code without the pool manager or split your app into two apps, one that doles out urls and another that consumes them.

The client-server pair here should give you some ideas. I was able to scale my client out horizontally when I used the hacky server code to load all urls into a Queue in memory just before app.run. Hope that helps.

Close you proxy and try it again.

ENV: Python 3.10, returns tls_version: TLS 1.3:

For poor guys like me who MUST using system proxy to make query, this may be due to your incorrect https proxy setting (may be you not set it BUT python somehow believe you set it, don't know why exactly, maybe because of you have set the http proxy), you need to set it "properly".

I'm using windows10, haven't set the https proxy before, after set it as (my proxy server can't handle https flow), python works like normal, give it a try.