Fix urllib3 Recursion Regression (#410)

* Fix urllib3 recursion

* Add regression testing for gevent

* [Mega-Linter] Apply linters fixes

* Add urllib3 to gevent tox env

Co-authored-by: TimPansino <TimPansino@users.noreply.github.com>

newrelic/packages/urllib3/contrib/_securetransport/bindings.py

@@ -48,7 +48,7 @@
 )
 from ctypes.util import find_library
 
-from urllib3.packages.six import raise_from
+from ...packages.six import raise_from
 
 if platform.system() != "Darwin":
     raise ImportError("Only macOS is supported")

newrelic/packages/urllib3/util/ssltransport.py

@@ -2,8 +2,8 @@
 import socket
 import ssl
 
-from urllib3.exceptions import ProxySchemeUnsupported
-from urllib3.packages import six
+from ..exceptions import ProxySchemeUnsupported
+from ..packages import six
 
 SSL_BLOCKSIZE = 16384
 

tests/adapter_gevent/test_patch_thread.py → tests/adapter_gevent/test_patching.py

@@ -12,8 +12,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import gevent.monkey
-
 
 def test_patch_thread():
+    import gevent.monkey
+
     gevent.monkey.patch_thread()
+
+
+def test_patch_ssl_recursion():
+    import gevent.monkey
+
+    gevent.monkey.patch_all()
+
+    # Delay imports and test creation of contexts from both bundled and installed urllib3
+    import urllib3.util.ssl_
+
+    import newrelic.packages.urllib3.util.ssl_
+
+    context1 = urllib3.util.ssl_.create_urllib3_context()
+    context2 = newrelic.packages.urllib3.util.ssl_.create_urllib3_context()

tox.ini

@@ -157,6 +157,7 @@ deps =
     adapter_cheroot: cheroot
     adapter_gevent: WSGIProxy2
     adapter_gevent: gevent
+    adapter_gevent: urllib3
     adapter_gunicorn-aiohttp1: aiohttp<2.0
     adapter_gunicorn-aiohttp3: aiohttp<4.0
     adapter_gunicorn-gunicorn19: gunicorn<20