Improve feedback message in SSL error

Adds the error message to give a hint to the user about
what happened.

Change-Id: I9ca56de8592e65194062038c81b468be72ffb2d9
Closes-Bug: 1297280

keystoneclient/session.py

@@ -406,8 +406,9 @@ class Session(object):
         try:
             try:
                 resp = self.session.request(method, url, **kwargs)
-            except requests.exceptions.SSLError:
+            except requests.exceptions.SSLError as e:
-                msg = _('SSL exception connecting to %s') % url
+                msg = _('SSL exception connecting to %(url)s: '
+                        '%(error)s') % {'url': url, 'error': e}
                 raise exceptions.SSLError(msg)
             except requests.exceptions.Timeout:
                 msg = _('Request to %s timed out') % url

keystoneclient/tests/unit/test_session.py

@@ -25,6 +25,7 @@ from testtools import matchers
 from keystoneclient import adapter
 from keystoneclient.auth import base
 from keystoneclient import exceptions
+from keystoneclient.i18n import _
 from keystoneclient import session as client_session
 from keystoneclient.tests.unit import utils
 
@@ -218,6 +219,23 @@ class SessionTests(utils.TestCase):
         client_session.Session(session=mock_session)
         self.assertFalse(mock_session.mount.called)
 
+    def test_ssl_error_message(self):
+        error = uuid.uuid4().hex
+
+        def _ssl_error(request, context):
+            raise requests.exceptions.SSLError(error)
+
+        self.stub_url('GET', text=_ssl_error)
+        session = client_session.Session()
+
+        # The exception should contain the URL and details about the SSL error
+        msg = _('SSL exception connecting to %(url)s: %(error)s') % {
+            'url': self.TEST_URL, 'error': error}
+        self.assertRaisesRegexp(exceptions.SSLError,
+                                msg,
+                                session.get,
+                                self.TEST_URL)
+
 
 class RedirectTests(utils.TestCase):