This sample demonstrates a basic structure that you can use to perform 3-legged OAuth using the Google Data Python client library in Google App Engine. This particular example talks to the Documents List Data API.
Note: The sample is available in two versions, one that signs requests with RSA-SHA1 and another that signs with HMAC-SHA1.Google Data API Tips
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22 comments:
Hi, I've been studying this code pretty intensely, since I'm trying to implement authorization over a mobile device.
So I plan to have them do the initial setup, using a browser, but after that, they should be able to call in and invoke services from their phone. I'll use their caller ID to get to their access token, which your code has conveniently stored in a table called TokenCollection. I do this by associating phone numbers with email ids. These email ids are my indexes into your TokenCollection table.
How is the value of "access_token" passed from MainPage->get to FetchData->post? You don't seem to pass it as a parameter.
Thanks, Ted Gilchrist
Hi Ted,
Thanks for the comment.
The short answer is that the token is passed as a property of the client/service object.
The Python lib stores both AuthSub (session) and OAuth (access) tokens inside a token_store or within a current_token property, depending on the setup. By default, I believe the token_store is used.
The service object recalls the token later on like this:
http://code.google.com/p/gdata-python-client/source/browse/trunk/src/gdata/service.py#418.
This process is dead simple on App Engine b/c tokens are stored for the current logged in user. All you need to do is recall the token later on:
access_token = client.token_store.find_token(SCOPE)
Hope this helps,
Eric
Hi
can OAuth in Google App Engine be implemented by using java.Plz help
thank you
Hi Rahul,
There's a GAE Java + Google Data + OAuth sample here:
http://oauthexample.appspot.com/Welcome
the source is available here:
http://code.google.com/p/googleappengine/source/browse/#svn/trunk/java/demos/oauth
Cheers,
Eric
Hi, I am trying to run the sample using Google App Engine Launcher. But I am getting errors.
I don know how to get, CONSUMER_KEY': 'YOUR_CONSUMER_KEY',
I am using app spot, so I do have any domain to register and get consumer keys.
Please help me . I am a nob in python. thanks
Thanks for the info. It helps. ^_^
I am looking for an OAuth example that users the GData client library in a GWT framework. Any ideas? GWT doesn't like any of the oAuth classes. For example as soon as I include GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters(); the starting point for any OAuth Code I get a NoClassDefFoundError error.
A Gwt-Gae-Java demo would be much appreciated?
Made a GWT App Engine OAuth Demo: http://code.google.com/p/gwt-examples/wiki/DemoGwtGData
Hi Brandon,
your work seems pretty good, thanks a lot!
Hi,
I guess the oauthexample.appspot.com disabled.
Anyways, a problem has been eating up my head since last night !
After aquiring the Access Token (it works fine right after acquiring it and retrieves blog lists perfectly!) ,
BUT when, I'm saving it as a session attribute.
Then, in the subsequent pages ( and requests), I'm creating a GoogleOAuthParameters object to pass to the setUserCredentials(...) function.
HttpSession s = request.getSession(true);
String accessToken=s.getAttribute("accessToken").toString();
String ats=s.getAttribute("oauth_token_secret").toString();
if(!s.isNew()){
GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters();
oauthParameters.setOAuthConsumerKey("sbose78.appspot.com");
oauthParameters.setOAuthConsumerSecret("81XXXXXXXXXXXXXXXXX");
oauthParameters.setOAuthToken(accessToken);
oauthParameters.setOAuthTokenSecret(ats);
OAuthSigner signer=new OAuthHmacSha1Signer();
/************************************************************/
MyBlog b=new MyBlog(oauthParameters, signer);
String blogs[]=b.printUserBlogs();
for(int i=0;i"+blogs[i]);
}
}
else{
out.println("NEW SESSION.. WON'T WORK !!");
}
I'm getting the following exception:
com.google.gdata.util.AuthenticationException: OK
Must authenticate to use 'default' user
Things had worked out fine when I used my Access token right after acquiring it.
Thanks ,
Shoubhik Bose.
How is the value of "access_token" passed from MainPage->get to FetchData->post? You don't seem to pass it as a parameter.
Thanks, Ted Gilchrist
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Any ideas? GWT doesn't like any of the oAuth classes. For example as soon as I include GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters(); the starting point for any OAuth Code I get a NoClassDefFoundError error.
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Eric's suggestion to use Zend_Gdata_HttpClient instead of Zend_Http_Client is not clear and generates other errors.
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