Don't set json content type for non-json data

+corresponding unit test on http client added

Change-Id: I8f2eacf595f1c73fea91b426b6c3fe6df4ad7bea
Closes-Bug: #1317259

saharaclient/api/base.py

@@ -73,7 +73,7 @@ class ResourceManager(object):
     def _create(self, url, data, response_key=None, dump_json=True):
         if dump_json:
             data = json.dumps(data)
-        resp = self.api.client.post(url, data)
+        resp = self.api.client.post(url, data, json=dump_json)
 
         if resp.status_code != 202:
             self._raise_api_exception(resp)
@@ -87,7 +87,7 @@ class ResourceManager(object):
     def _update(self, url, data, response_key=None, dump_json=True):
         if dump_json:
             data = json.dumps(data)
-        resp = self.api.client.put(url, data)
+        resp = self.api.client.put(url, data, json=dump_json)
 
         if resp.status_code != 202:
             self._raise_api_exception(resp)

saharaclient/api/httpclient.py

@@ -25,15 +25,17 @@ class HTTPClient(object):
         return requests.get(self.base_url + url,
                             headers={'x-auth-token': self.token})
 
-    def post(self, url, body):
-        return requests.post(self.base_url + url, body,
-                             headers={'x-auth-token': self.token,
-                                      'content-type': 'application/json'})
+    def post(self, url, body, json=True):
+        headers = {'x-auth-token': self.token}
+        if json:
+            headers['content-type'] = 'application/json'
+        return requests.post(self.base_url + url, body, headers=headers)
 
-    def put(self, url, body):
-        return requests.put(self.base_url + url, body,
-                            headers={'x-auth-token': self.token,
-                                     'content-type': 'application/json'})
+    def put(self, url, body, json=True):
+        headers = {'x-auth-token': self.token}
+        if json:
+            headers['content-type'] = 'application/json'
+        return requests.put(self.base_url + url, body, headers=headers)
 
     def delete(self, url):
         return requests.delete(self.base_url + url,

saharaclient/tests/unit/test_httpclient.py

@@ -0,0 +1,56 @@
+# Copyright (c) 2013 Mirantis Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import mock
+import testtools
+
+from saharaclient.api import httpclient
+
+
+class ResourceTest(testtools.TestCase):
+
+    @mock.patch('requests.post')
+    def test_post_json_content_type(self, mpost):
+        client = httpclient.HTTPClient("http://localhost", "token")
+        client.post('/test', '{"json":"True"}')
+
+        self.assertEqual(1, mpost.call_count)
+        self.assertEqual('application/json',
+                         mpost.call_args[1]['headers']["content-type"])
+
+    @mock.patch('requests.put')
+    def test_put_json_content_type(self, mput):
+        client = httpclient.HTTPClient("http://localhost", "token")
+        client.put('/test', '{"json":"True"}')
+
+        self.assertEqual(1, mput.call_count)
+        self.assertEqual('application/json',
+                         mput.call_args[1]['headers']["content-type"])
+
+    @mock.patch('requests.post')
+    def test_post_nonjson_content_type(self, mpost):
+        client = httpclient.HTTPClient("http://localhost", "token")
+        client.post('/test', 'nonjson', json=False)
+
+        self.assertEqual(1, mpost.call_count)
+        self.assertNotIn("content-type", mpost.call_args[1]['headers'])
+
+    @mock.patch('requests.put')
+    def test_put_nonjson_content_type(self, mput):
+        client = httpclient.HTTPClient("http://localhost", "token")
+        client.put('/test', 'nonjson', json=False)
+
+        self.assertEqual(1, mput.call_count)
+        self.assertNotIn("content-type", mput.call_args[1]['headers'])