Added create function to host and service

Change-Id: I630b62e324e362a79602cdea1759e7cedded6ab1

surveilclient/common/http.py

@@ -15,6 +15,7 @@
 
 from six.moves import http_client as httplib
 
+from surveilclient import exc
 from surveilclient.openstack.common.py3kcompat import urlutils
 
 import copy
@@ -52,7 +53,17 @@ class HTTPClient(object):
         conn = self.get_connection()
         conn.request(method, self.endpoint_path + url, **kwargs)
         resp = conn.getresponse()
-        return resp
+
+        body_str = resp.read()
+
+        if 400 <= resp.status < 600:
+            raise exc.from_response(
+                response=resp, body=body_str, method=method, url=url)
+        elif resp.status == 300:
+            raise exc.from_response(
+                response=resp, body=body_str, method=method, url=url)
+
+        return resp, body_str
 
     def json_request(self, url, method, **kwargs):
         """Send an http request with the specified characteristics.
@@ -60,5 +71,9 @@ class HTTPClient(object):
         """
         kwargs['headers'] = copy.deepcopy(kwargs.get('headers', {}))
         kwargs['headers'].setdefault('Content-Type', 'application/json')
-        resp = self._http_request(url, method, **kwargs)
-        return resp, json.loads(resp.read().decode())
+
+        if 'body' in kwargs:
+            kwargs['body'] = json.dumps(kwargs['body'])
+
+        resp, body = self._http_request(url, method, **kwargs)
+        return resp, json.loads(body)

surveilclient/exc.py

@@ -12,6 +12,59 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
+import json
+
 
 class CommandError(BaseException):
     """Invalid usage of CLI."""
+
+
+class ClientException(Exception):
+    """The base exception class for all exceptions this library raises."""
+    pass
+
+
+class HttpError(ClientException):
+    """The base exception class for all HTTP exceptions."""
+    http_status = 0
+    message = "HTTP Error"
+
+    def __init__(self, message=None, details=None,
+                 response=None, request_id=None,
+                 url=None, method=None, http_status=None):
+        self.http_status = http_status or self.http_status
+        self.message = message or self.message
+        self.details = details
+        self.request_id = request_id
+        self.response = response
+        self.url = url
+        self.method = method
+        formatted_string = "%s (HTTP %s)" % (self.message, self.http_status)
+        if request_id:
+            formatted_string += " (Request-ID: %s)" % request_id
+        super(HttpError, self).__init__(formatted_string)
+
+
+def from_response(response, body, method, url):
+    """Returns an instance of :class:`HttpError` or subclass based on response.
+
+    :param response: instance of `requests.Response` class
+    :param method: HTTP method used for request
+    :param url: URL used for request
+    """
+
+    if response.getheader('Content-Type').startswith('application/json'):
+        try:
+            loaded_body = json.loads(body)
+            if 'faultstring' in loaded_body:
+                body = loaded_body['faultstring']
+        except ValueError:
+            pass
+
+    return HttpError(
+        response=response,
+        url=url,
+        method=method,
+        http_status=response.status,
+        message=body
+    )

surveilclient/v1_0/hosts.py

@@ -24,3 +24,11 @@ class HostsManager(surveil_manager.SurveilManager):
             HostsManager.base_url, 'GET'
         )
         return body
+
+    def create(self, **kwargs):
+        """Create a new host."""
+        resp, body = self.http_client.json_request(
+            HostsManager.base_url, 'POST',
+            body=kwargs
+        )
+        return body

surveilclient/v1_0/services.py

@@ -24,3 +24,11 @@ class ServicesManager(surveil_manager.SurveilManager):
             ServicesManager.base_url, 'GET'
         )
         return body
+
+    def create(self, **kwargs):
+        """Create a new host."""
+        resp, body = self.http_client.json_request(
+            ServicesManager.base_url, 'POST',
+            body=kwargs
+        )
+        return body