[Python] How do you access an authenticated Google App Engine service from a (non-web) python...

I have a Google App Engine app - http://mylovelyapp.appspot.com/ It has a page - mylovelypage

For the moment, the page just does self.response.out.write('OK')

If I run the following Python at my computer:

import urllib2
f = urllib2.urlopen("http://mylovelyapp.appspot.com/mylovelypage")
s = f.read()
print s
f.close()


it prints "OK"

the problem is if I add login:required to this page in the app's yaml

then this prints out the HTML of the Google Accounts login page

I've tried "normal" authentication approaches. e.g.

passman = urllib2.HTTPPasswordMgrWithDefaultRealm()

auth_handler = urllib2.HTTPBasicAuthHandler()
auth_handler.add_password(None,
uri='http://mylovelyapp.appspot.com/mylovelypage',
user='billy.bob@gmail.com',
passwd='billybobspasswd')
opener = urllib2.build_opener(auth_handler)
urllib2.install_opener(opener)


But it makes no difference - I still get the login page's HTML back.

I've tried Google's ClientLogin auth API, but I can't get it to work.

h = httplib2.Http()

auth_uri = 'https://www.google.com/accounts/ClientLogin'
headers = {'Content-Type': 'application/x-www-form-urlencoded'}
myrequest = "Email=%s&Passwd=%s&service=ah&source=DALELANE-0.0" % ("billy.bob@gmail.com", "billybobspassword")
response, content = h.request(auth_uri, 'POST', body=myrequest, headers=headers)

if response['status'] == '200':
authtok = re.search('Auth=(\S*)', content).group(1)

headers = {}
headers['Authorization'] = 'GoogleLogin auth=%s' % authtok.strip()
headers['Content-Length'] = '0'

response, content = h.request("http://mylovelyapp.appspot.com/mylovelypage",
'POST',
body="",
headers=headers)

while response['status'] == "302":
response, content = h.request(response['location'], 'POST', body="", headers=headers)

print content


I do seem to be able to get some token correctly, but attempts to use it in the header when I call 'mylovelypage' still just return me the login page's HTML. :-(

Can anyone help, please?

Could I use the GData client library to do this sort of thing? From what I've read, I think it should be able to access App Engine apps, but I haven't been any more successful at getting the authentication working for App Engine stuff there either

Any pointers to samples, articles, or even just keywords I should be searching for to get me started, would be very much appreciated.

Thanks!

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