如何使用RESTEasy在Google App Engine中实现oAuth 2.0？

Question

I am developing a Google App Engine REST service and I want to use oAuth 2.0 for authentication. I added the following code to my service methods to check for a valid user and it works in that it throws an exception when I am not authenticated.

try 
{
    final OAuthService oauth = OAuthServiceFactory.getOAuthService();
    final User user = oauth.getCurrentUser();
}
catch (final OAuthRequestException e)
{
    throw new RuntimeException(e);
}

Now I want to authenticate against this with command line programs that are written in Java and Python.

I have spent hours searching Google and StackOverflow both and I can't find a single lucid example of how to authenticate against my GAE application with a non-browser application that makes any sense. I found lots of examples on how to authenticate against Google's own API's but nothing about authenticating against my own Google App Engine application.

Can someone provide a instructions on how to authenticate against a Google App Engine application with either Java or Python?

Answer 1

Solution

I finally got OAuth 2.0 working on my Google App Engine application. I have uploaded some example command line tool client code to my GitHub account. It is way too much code to publish here in code boxes. I will update this answer when I do a complete blog post about how I got it working and how the code works.

RESTEasy

Use the code posted in my question to access the User that is authenticated as the first thing in each service method, it will throw and exception if the user isn't authenticated.

Credits

Thanks to Fábio Uechi for posting some code that mostly worked and just needed some updating. I did more than a little updating and refactored it out a good bit from what he had done .