Handle 403 forbidden on download

A download of a deactivated image may result in a 403.
The cli should catch this error rather than stack trace.

We also catch other unexpected http responses.

Change-Id: If33fbc3a56cdb02b3ab32a6479a67fff20b4b1a9
Closes-bug: 1523612

glanceclient/tests/unit/v2/test_images.py

@@ -872,6 +872,15 @@ class TestController(testtools.TestCase):
         body = self.controller.data('image_id')
         self.assertEqual(None, body)
 
+    def test_download_forbidden(self):
+        self.controller.http_client.get = mock.Mock(
+            side_effect=exc.HTTPForbidden())
+        try:
+            self.controller.data('image_id')
+            self.fail('No forbidden exception raised.')
+        except exc.HTTPForbidden:
+            pass
+
     def test_update_replace_prop(self):
         image_id = '3a4560a1-e585-443e-9b39-553b46ec92d1'
         params = {'name': 'pong'}

glanceclient/tests/unit/v2/test_shell_v2.py

@@ -652,6 +652,36 @@ class ShellV2Test(testtools.TestCase):
             self.assert_exits_with_msg(func=test_shell.do_image_delete,
                                        func_args=args)
 
+    @mock.patch.object(utils, 'print_err')
+    def test_do_image_download_with_forbidden_id(self, mocked_print_err):
+        args = self._make_args({'id': 'IMG-01', 'file': None,
+                                'progress': False})
+        with mock.patch.object(self.gc.images, 'data') as mocked_data:
+            mocked_data.side_effect = exc.HTTPForbidden
+            try:
+                test_shell.do_image_download(self.gc, args)
+                self.fail('Exit not called')
+            except SystemExit:
+                pass
+
+            self.assertEqual(1, mocked_data.call_count)
+            self.assertEqual(1, mocked_print_err.call_count)
+
+    @mock.patch.object(utils, 'print_err')
+    def test_do_image_download_with_500(self, mocked_print_err):
+        args = self._make_args({'id': 'IMG-01', 'file': None,
+                                'progress': False})
+        with mock.patch.object(self.gc.images, 'data') as mocked_data:
+            mocked_data.side_effect = exc.HTTPInternalServerError
+            try:
+                test_shell.do_image_download(self.gc, args)
+                self.fail('Exit not called')
+            except SystemExit:
+                pass
+
+            self.assertEqual(1, mocked_data.call_count)
+            self.assertEqual(1, mocked_print_err.call_count)
+
     def test_do_member_list(self):
         args = self._make_args({'image_id': 'IMG-01'})
         with mock.patch.object(self.gc.image_members, 'list') as mocked_list: