Oauth for Google API example using Python / Django
- by DrDee
Hi,
I am trying to get Oauth working with the Google API using Python. I have tried different oauth libraries such as oauth, oauth2 and djanog-oauth but I cannot get it to work (including the provided examples).
For debugging Oauth I use Google's Oauth Playground and I have studied the API and the Oauth documentation
With some libraries I am struggling with getting a right signature, with other libraries I am struggling with converting the request token to an authorized token. What would really help me if someone can show me a working example for the Google API using one of the above-mentioned libraries.
EDIT: My initial question did not lead to any answers so I have added my code. There are two possible causes of this code not working:
1) Google does not authorize my request token, but not quite sure how to detect this
2) THe signature for the access token is invalid but then I would like to know which oauth parameters Google is expecting as I am able to generate a proper signature in the first phase.
This is written using oauth2.py and for Django hence the HttpResponseRedirect.
REQUEST_TOKEN_URL = 'https://www.google.com/accounts/OAuthGetRequestToken'
AUTHORIZATION_URL = 'https://www.google.com/accounts/OAuthAuthorizeToken'
ACCESS_TOKEN_URL = 'https://www.google.com/accounts/OAuthGetAccessToken'
CALLBACK = 'http://localhost:8000/mappr/mappr/oauth/' #will become real server when deployed
OAUTH_CONSUMER_KEY = 'anonymous'
OAUTH_CONSUMER_SECRET = 'anonymous'
signature_method = oauth.SignatureMethod_HMAC_SHA1()
consumer = oauth.Consumer(key=OAUTH_CONSUMER_KEY, secret=OAUTH_CONSUMER_SECRET)
client = oauth.Client(consumer)
request_token = oauth.Token('','') #hackish way to be able to access the token in different functions, I know this is bad, but I just want it to get working in the first place :)
def authorize(request):
if request.GET == {}:
tokens = OAuthGetRequestToken()
return HttpResponseRedirect(AUTHORIZATION_URL + '?' + tokens)
elif request.GET['oauth_verifier'] != '':
oauth_token = request.GET['oauth_token']
oauth_verifier = request.GET['oauth_verifier']
OAuthAuthorizeToken(oauth_token)
OAuthGetAccessToken(oauth_token, oauth_verifier)
#I need to add a Django return object but I am still debugging other phases.
def OAuthGetRequestToken():
print '*** OUTPUT OAuthGetRequestToken ***'
params = {
'oauth_consumer_key': OAUTH_CONSUMER_KEY,
'oauth_nonce': oauth.generate_nonce(),
'oauth_signature_method': 'HMAC-SHA1',
'oauth_timestamp': int(time.time()), #The timestamp should be expressed in number of seconds after January 1, 1970 00:00:00 GMT.
'scope': 'https://www.google.com/analytics/feeds/',
'oauth_callback': CALLBACK,
'oauth_version': '1.0'
}
# Sign the request.
req = oauth.Request(method="GET", url=REQUEST_TOKEN_URL, parameters=params)
req.sign_request(signature_method, consumer, None)
tokens =client.request(req.to_url())[1]
params = ConvertURLParamstoDictionary(tokens)
request_token.key = params['oauth_token']
request_token.secret = params['oauth_token_secret']
return tokens
def OAuthAuthorizeToken(oauth_token):
print '*** OUTPUT OAuthAuthorizeToken ***'
params ={
'oauth_token' :oauth_token,
'hd': 'default'
}
req = oauth.Request(method="GET", url=AUTHORIZATION_URL, parameters=params)
req.sign_request(signature_method, consumer, request_token)
response =client.request(req.to_url())
print response #for debugging purposes
def OAuthGetAccessToken(oauth_token, oauth_verifier):
print '*** OUTPUT OAuthGetAccessToken ***'
params = {
'oauth_consumer_key': OAUTH_CONSUMER_KEY,
'oauth_token': oauth_token,
'oauth_verifier': oauth_verifier,
'oauth_token_secret': request_token.secret,
'oauth_signature_method': 'HMAC-SHA1',
'oauth_timestamp': int(time.time()),
'oauth_nonce': oauth.generate_nonce(),
'oauth_version': '1.0',
}
req = oauth.Request(method="GET", url=ACCESS_TOKEN_URL, parameters=params)
req.sign_request(signature_method, consumer, request_token)
response =client.request(req.to_url())
print response
return req
def ConvertURLParamstoDictionary(tokens):
params = {}
tokens = tokens.split('&')
for token in tokens:
token = token.split('=')
params[token[0]] = token[1]
return params
