OAuth issue in Google AppEngine developing - google-app-engine

Question

i have encountered a weird problem in Google App Engine developing, every time is carry a body content in my post request, app engine failed to auth my account, but get request works.
can anybody help me? i'm using oauth library ChromeExOAuth in chrome extension developing.
oauth.authorize(function(){
var request = {
'method': 'POST',
'headers': {
"Content-Type" : "application/x-www-form-urlencoded"
},
'parameters': {
},
'body': "a=b"
};
oauth.sendSignedRequest("http://mytabshub.appspot.com/tabshub", function(resp, xhr){
console.log("responding from test server", xhr.responseText);
}, request);
});

Answer 1

For POST requests you must pass the oauth parameter url-encoded in the request body. The relavant code in the SDK is this (dev_appserver_oauth.py):
def _Parse(self, request, base_env_dict):
"""Parses a request into convenient pieces.
Args:
request: AppServerRequest.
base_env_dict: Dictionary of CGI environment parameters.
Returns:
A tuple (method, path, headers, parameters) of the HTTP method, the
path (minus query string), an instance of mimetools.Message with
headers from the request, and a dictionary of parameter lists from the
body or query string (in the form of {key :[value1, value2]}).
"""
method = base_env_dict['REQUEST_METHOD']
path, query = dev_appserver.SplitURL(request.relative_url)
parameters = {}
if method == 'POST':
form = cgi.FieldStorage(fp=request.infile,
headers=request.headers,
environ=base_env_dict)
for key in form:
if key not in parameters:
parameters[key] = []
for value in form.getlist(key):
parameters[key].append(value)
elif method == 'GET':
parameters = cgi.parse_qs(query)
return method, path, request.headers, parameters
See that the query is only parsed in GET requests. For POST, it must be in the body.