http: handle RequestException

It's kind of requests catch-all excpetion, so print information in this case
in order to debug it better.

src/surykatka/http.py

@@ -18,6 +18,8 @@
 # See https://www.nexedi.com/licensing for rationale and options.
 
 import requests
+import sys
+import traceback
 from urllib.parse import urlparse, urlunsplit
 from forcediphttpsadapter.adapters import ForcedIPHTTPSAdapter
 from peewee import fn
@@ -84,6 +86,10 @@ def request(url, timeout=TIMEOUT, headers=None, session=requests, version=0):
     except requests.exceptions.TooManyRedirects:
         response = requests.models.Response()
         response.status_code = 520
+    except requests.exceptions.RequestException:
+        response = requests.models.Response()
+        response.status_code = 000
+        print(traceback.print_exception(*(sys.exc_info())))
     return response
 
 

tests/test_http.py

@@ -178,6 +178,19 @@ class SurykatkaHttpTestCase(unittest.TestCase):
             assert mock_request.call_count == 1
             assert response.status_code == 524, response.status_code
 
+    def test_request_RequestException(self):
+        url_to_proxy = "http://example.org/"
+        httpretty.register_uri(httpretty.GET, url_to_proxy)
+        with mock.patch("surykatka.http.requests.request") as mock_request:
+
+            def sideEffect(*args, **kw):
+                raise surykatka.http.requests.exceptions.RequestException()
+
+            mock_request.side_effect = sideEffect
+            response = request(url_to_proxy)
+            assert mock_request.call_count == 1
+            assert response.status_code == 000, response.status_code
+
     def test_request_tooManyRedirect(self):
         url_to_proxy = "http://example.org/"
         httpretty.register_uri(httpretty.GET, url_to_proxy)