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TargetProcess / signalr-client-py

python client proxy for signalr
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Broken requests #37

Open adotorc opened 6 years ago

adotorc commented 6 years ago

As soon as signalr is imported, normal requests queries using ssl (get/post) fail to initialize, entering in a recursion loop that ultimately makes them crash.

Steps to reproduce:

import requests import signalr requests.get("https://www.google.com")

Traceback here:

Traceback (most recent call last): File "signalrRequestCrash.py", line 3, in requests.get("https://www.google.com") File "C:\Program Files (x86)\Python36-32\lib\site-packages\requests\api.py", line 72, in get return request('get', url, params=params, kwargs) File "C:\Program Files (x86)\Python36-32\lib\site-packages\requests\api.py", line 58, in request return session.request(method=method, url=url, kwargs) File "C:\Program Files (x86)\Python36-32\lib\site-packages\requests\sessions.py", line 508, in request resp = self.send(prep, send_kwargs) File "C:\Program Files (x86)\Python36-32\lib\site-packages\requests\sessions.py", line 618, in send r = adapter.send(request, kwargs) File "C:\Program Files (x86)\Python36-32\lib\site-packages\requests\adapters.py", line 440, in send timeout=timeout File "C:\Program Files (x86)\Python36-32\lib\site-packages\urllib3\connectionpool.py", line 601, in urlopen chunked=chunked) File "C:\Program Files (x86)\Python36-32\lib\site-packages\urllib3\connectionpool.py", line 346, in _make_request self._validate_conn(conn) File "C:\Program Files (x86)\Python36-32\lib\site-packages\urllib3\connectionpool.py", line 850, in _validate_conn conn.connect() File "C:\Program Files (x86)\Python36-32\lib\site-packages\urllib3\connection.py", line 314, in connect cert_reqs=resolve_cert_reqs(self.certreqs), File "C:\Program Files (x86)\Python36-32\lib\site-packages\urllib3\util\ssl.py", line 269, in create_urllib3_context context.options |= options File "C:\Program Files (x86)\Python36-32\lib\ssl.py", line 465, in options super(SSLContext, SSLContext).options.set(self, value) File "C:\Program Files (x86)\Python36-32\lib\ssl.py", line 465, in options super(SSLContext, SSLContext).options.set(self, value) File "C:\Program Files (x86)\Python36-32\lib\ssl.py", line 465, in options super(SSLContext, SSLContext).options.set(self, value) [Previous line repeated 323 more times] RecursionError: maximum recursion depth exceeded

Python 3.6.3 (32bits, Windows) Pip freeze results:

altgraph==0.14 asn1crypto==0.23.0 certifi==2017.7.27.1 cffi==1.11.2 chardet==3.0.4 cryptography==2.1.3 Cython==0.27.3 future==0.16.0 gevent==1.2.2 greenlet==0.4.12 idna==2.6 macholib==1.8 numpy==1.13.3 pefile==2017.9.3 pycparser==2.18 PyInstaller==3.3 pypiwin32==220 pyTelegramBotAPI==3.2.1 PyYAML==3.12 requests==2.18.4 shellescape==3.4.1 signalr-client==0.0.7 six==1.11.0 sseclient==0.0.18 TA-Lib==0.4.10 urllib3==1.22 websocket-client==0.44.0

zplizzi commented 6 years ago

Similar problem, these four lines cause a crash (IOError: [Errno 11] Resource temporarily unavailable):

from multiprocessing import Manager
from signalr import Connection

manager = Manager()
order_books = manager.dict()

Manager uses sockets for the interprocess communication, so I assume that's how these issues are related.

alexykot commented 6 years ago

I've encountered same thing just now, and the solution is to import and monkey patch gevent before that. I.e.:

import gevent.monkey
gevent.monkey.patch_all()

from requests import Session
from signalr import Connection

This prevents the infinite recursion problem.