What steps will reproduce the problem? 1. Send an HTTP PATCH request from a Google App Engine application. 2. Get an exception stating that "PATCH" is not supported

What is the expected output? What do you see instead? I would expect httplib2 to intercept the PATCH request and send a POST request instead with a "X-Http-Method-Override: PATCH" header to circumvent this limitation. This won't be needed when this issue is fixed: http://code.google.com/p/googleappengine/issues/detail?id=6316

The attached patch takes a shot at solving this issue.

Update for a code update:

class AppEngineHttpConnection(httplib.HTTPConnection): ... def request(self, method, url, body=None, headers={}): if method.lower() in UNAUTHORIZED_METHODS: # No side-effects on provided headers. new_headers = {} new_headers.update(headers) new_headers[HTTP_METHOD_OVERRIDE_HEADER] = method method = HTTP_OVERRIDE_METHOD headers = new_headers super(AppEngineHttpConnection, self).request(method, url, body, headers)

since AppEngineHttpConnection now inherits from httplib.HTTPConnection