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

Question

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 https://host/meters/a_serial/power

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('https://host/meters/a_serial/power', 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('https://host/meters/a_serial/power', auth=('user', 'password'))
  File "C:Python27libsite-packages
equestsapi.py", line 69, in get
    return request('get', url, params=params, **kwargs)
  File "C:Python27libsite-packages
equestsapi.py", line 50, in request
    response = session.request(method=method, url=url, **kwargs)
  File "C:Python27libsite-packages
equestssessions.py", line 468, in request
    resp = self.send(prep, **send_kwargs)
  File "C:Python27libsite-packages
equestssessions.py", line 576, in send
    r = adapter.send(request, **kwargs)
  File "C:Python27libsite-packages
equestsadapters.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('https://', MyAdapter())
s.get('https://host/meters/a_serial/power')

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('https://host/meters/a_serial/power')
  File "C:Python27libsite-packages
equestssessions.py", line 480, in get
    return self.request('GET', url, **kwargs)
  File "C:Python27libsite-packages
equestssessions.py", line 468, in request
    resp = self.send(prep, **send_kwargs)
  File "C:Python27libsite-packages
equestssessions.py", line 576, in send
    r = adapter.send(request, **kwargs)
  File "C:Python27libsite-packages
equestsadapters.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!

Answer 1

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.