Handle UnicodeDecodeError in log_http_response

Similar to commit dec9c9f35 and log_curl_request,
this ignores decoding errors when logging response
headers by passing errors='ignore' to safe_encode.

Change-Id: Ic915a7d8334e9473f300c9db670a3a8f5cda8976
Closes-Bug: #1369756

glanceclient/common/http.py

@@ -130,7 +130,8 @@ class HTTPClient(object):
         if body:
             body = strutils.safe_decode(body)
             dump.extend([body, ''])
-        LOG.debug('\n'.join([strutils.safe_encode(x) for x in dump]))
+        LOG.debug('\n'.join([strutils.safe_encode(x, errors='ignore')
+                             for x in dump]))
 
     @staticmethod
     def encode_headers(headers):

tests/test_http.py

@@ -232,6 +232,16 @@ class TestClient(testtools.TestCase):
         self.assertTrue(isinstance(body, types.GeneratorType))
         self.assertEqual([data], list(body))
 
+    def test_log_http_response_with_non_ascii_char(self):
+        try:
+            response = 'Ok'
+            headers = {"Content-Type": "text/plain",
+                       "test": "value1\xa5\xa6"}
+            fake = utils.FakeResponse(headers, six.StringIO(response))
+            self.client.log_http_response(fake)
+        except UnicodeDecodeError as e:
+            self.fail("Unexpected UnicodeDecodeError exception '%s'" % e)
+
 
 class TestVerifiedHTTPSConnection(testtools.TestCase):
     """Test fixture for glanceclient.common.http.VerifiedHTTPSConnection."""