Fix exceptions to be displayed properly

Valence exception messages are not displayed properly. This commit
is to fix the same.

Change-Id: If4da51f736d28e60a3cfa78094b2e60bedecdd83
Closes-Bug:#1715580

valenceclient/common/http.py

@@ -48,16 +48,7 @@ def _trim_endpoint_api_version(url):
 
 
 def _extract_error_json(body):
-    error_json = {}
-    try:
-        body_json = jsonutils.loads(body)
-        if 'error_message' in body_json:
-            raw_msg = body_json['error_message']
-            error_json = jsonutils.loads(raw_msg)
-    except ValueError:
-        pass
-
-    return error_json
+    return jsonutils.loads(body)
 
 
 def with_retries(func):
@@ -153,9 +144,7 @@ class HTTPClient(object):
         body_iter = six.StringIO(resp.text)
         if resp.status_code >= http_client.BAD_REQUEST:
             error_json = _extract_error_json(resp.text)
-            raise exc.from_response(resp, error_json.get('faultstring'),
-                                    error_json.get('debugfino'), method,
-                                    conn_url)
+            raise exc.from_response(resp, error_json, method, conn_url)
         elif resp.status_code in (http_client.FOUND,
                                   http_client.USE_PROXY):
             return self._http_request(resp['location'], method, **kwargs)

valenceclient/exc.py

@@ -14,15 +14,11 @@
 #    under the License.
 
 from valenceclient.common.apiclient import exceptions
-from valenceclient.common.apiclient.exceptions import BadRequest
-from valenceclient.common.apiclient.exceptions import ClientException
-from valenceclient.common.apiclient.exceptions import InternalServerError
-from valenceclient.common.apiclient.exceptions import ValidationError
 
-BadRequest = BadRequest
-ClientException = ClientException
-InternalServerError = InternalServerError
-ValidationError = ValidationError
+BadRequest = exceptions.BadRequest
+ClientException = exceptions.ClientException
+InternalServerError = exceptions.InternalServerError
+ValidationError = exceptions.ValidationError
 
 
 class InvalidValenceUrl(ClientException):
@@ -45,15 +41,10 @@ class ConnectionRefuse(ClientException):
     pass
 
 
-def from_response(response, message=None, traceback=None, method=None,
-                  url=None):
+def from_response(response, error=None, method=None, url=None):
     """Return an HttpError instance based on response from httplib/requests"""
-
     error_body = {}
-    if message:
-        error_body['message'] = message
-    if traceback:
-        error_body['traceback'] = traceback
+    error_body['message'] = error['detail']
 
     if hasattr(response, 'status') and not hasattr(response, 'status_code'):
         response.status_code = response.status

valenceclient/tests/unit/common/test_exc.py

@@ -26,18 +26,19 @@ class ExcTest(test_utils.BaseTestCase):
 
     def setUp(self):
         super(ExcTest, self).setUp()
-        self.message = 'SpongeBob SquarePants'
-        self.traceback = 'Foo Traceback'
+        self.error = {'code': 'Bad Request',
+                      'status': '400',
+                      'detail': 'unsupported parameters',
+                      'title': 'BadRequest'}
+
         self.method = 'call_spongebob'
         self.url = 'http://foo.bar'
-        self.expected_json = {'error': {'message': self.message,
-                                        'traceback': self.traceback}}
+        self.expected_json = {'error': {'message': 'unsupported parameters'}}
 
     def test_from_response(self, mock_apiclient):
         fake_response = mock.Mock(status_code=http_client.BAD_REQUEST)
-        exc.from_response(fake_response, message=self.message,
-                          traceback=self.traceback, method=self.method,
-                          url=self.url)
+        exc.from_response(fake_response, error=self.error,
+                          method=self.method, url=self.url)
         self.assertEqual(http_client.BAD_REQUEST, fake_response.status_code)
         self.assertEqual(self.expected_json, fake_response.json())
         mock_apiclient.assert_called_once_with(
@@ -48,8 +49,7 @@ class ExcTest(test_utils.BaseTestCase):
         fake_response.getheader.return_value = 'fake-header'
         delattr(fake_response, 'status_code')
 
-        exc.from_response(fake_response, message=self.message,
-                          traceback=self.traceback, method=self.method,
+        exc.from_response(fake_response, error=self.error, method=self.method,
                           url=self.url)
         expected_header = {'Content-Type': 'fake-header'}
         self.assertEqual(expected_header, fake_response.headers)

valenceclient/tests/unit/common/test_http.py

@@ -27,17 +27,13 @@ DEFAULT_HOST = 'localhost'
 DEFAULT_POST = '1234'
 
 
-def _get_error_body(faultstring=None, debuginfo=None, description=None):
-    if description:
-        error_body = {'description': description}
-    else:
-        error_body = {
-            'faultstring': faultstring,
-            'debuginfo': debuginfo
-            }
-    raw_error_body = jsonutils.dump_as_bytes(error_body)
-    body = {'error_message': raw_error_body}
-    return jsonutils.dumps(body)
+def _get_error_body(detail=None):
+    error = {'code': 'Bad Request',
+             'status': '400',
+             'detail': detail or 'unsupported params',
+             'title': 'BadRequest'}
+
+    return jsonutils.dumps(error)
 
 
 class HttpClientTest(utils.BaseTestCase):
@@ -76,6 +72,7 @@ class HttpClientTest(utils.BaseTestCase):
 
     def test_server_exception_msg_only(self):
         error_body = "test error msg"
+        error_body = _get_error_body(detail=error_body)
         kwargs = {"valence_url": "http://localhost"}
         client = http.HTTPClient(**kwargs)
         client.session = utils.mockSession(
@@ -90,7 +87,7 @@ class HttpClientTest(utils.BaseTestCase):
 
     def test_server_exception_description_only(self):
         error_msg = "test error msg"
-        error_body = _get_error_body(description=error_msg)
+        error_body = _get_error_body(detail=error_msg)
         kwargs = {"valence_url": "http://localhost/"}
         client = http.HTTPClient(**kwargs)
         client.session = utils.mockSession(