feat(exception_411): add new exception, HTTP 411.

falcon/exceptions.py

@@ -214,6 +214,27 @@ class HTTPConflict(HTTPError):
         HTTPError.__init__(self, status.HTTP_409, title, description, **kwargs)
 
 
+class HTTPLengthRequired(HTTPError):
+    """411 Length Required
+
+    From RFC 2616:
+
+    "The server refuses to accept the request without a defined
+   Content- Length. The client MAY repeat the request if it adds a
+   valid Content-Length header field containing the length of the
+   message-body in the request message."
+
+    """
+    def __init__(self, title, description, **kwargs):
+        """Initialize
+
+        Args:
+            Same as for HTTPError, except status is set for you.
+
+        """
+        HTTPError.__init__(self, status.HTTP_411, title, description, **kwargs)
+
+
 class HTTPPreconditionFailed(HTTPError):
     """412 Precondition Failed
 

falcon/tests/test_httperror.py

@@ -89,6 +89,12 @@ class MethodNotAllowedResource:
         raise falcon.HTTPMethodNotAllowed(['PUT'])
 
 
+class LengthRequiredResource:
+
+    def on_get(self, req, resp):
+        raise falcon.HTTPLengthRequired('title', 'description')
+
+
 class RangeNotSatisfiableResource:
 
     def on_get(self, req, resp):
@@ -277,6 +283,15 @@ class TestHTTPError(testing.TestBase):
         self.assertEqual(body, [])
         self.assertIn(('Allow', 'PUT'), self.srmock.headers)
 
+    def test_411(self):
+        self.api.add_route('/411', LengthRequiredResource())
+        body = self.simulate_request('/411')
+        parsed_body = json.loads(body[0].decode())
+
+        self.assertEqual(self.srmock.status, falcon.HTTP_411)
+        self.assertEqual(parsed_body['title'], 'title')
+        self.assertEqual(parsed_body['description'], 'description')
+
     def test_416_default_media_type(self):
         self.api = falcon.API('application/xml')
         self.api.add_route('/416', RangeNotSatisfiableResource())

tools/test-requires

@@ -2,4 +2,4 @@ coverage
 nose
 ordereddict
 six
-testtools
+testtools