Using Oltu to connect to Doorkeeper - ruby-on-rails

Question

I'm attempting to authenticate against a rails app running as an OAuth2 provider running Doorkeeper.
I'm attempting to modify an example from the Oltu sources. The code that I have currently is:
public class OAuthClientTest {
public static void main(String[] args) throws OAuthSystemException, IOException {
String authUri = "http://smoke-track.herokuapp.com/oauth/authorize";
String callback = "http://localhost:8080";
String clientId = "728ad798943fff1afd90e79765e9534ef52a5b166cfd25f055d1c8ff6f3ae7fd";
String secret = "3728e0449052b616e2465c04d3cbd792f2d37e70ca64075708bfe8b53c28d529";
String tokenUri = "http://smoke-track.herokuapp.com/oauth/token";
try {
OAuthClientRequest request = OAuthClientRequest
.authorizationLocation(authUri)
.setClientId(clientId)
.setRedirectURI(callback)
.setResponseType("code")
.buildQueryMessage();
System.out.println("Visit: " + request.getLocationUri() + "\nand grant permission");
System.out.print("Now enter the OAuth code you have received in redirect uri ");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String code = br.readLine();
request = OAuthClientRequest
.tokenLocation(tokenUri)
.setGrantType(GrantType.AUTHORIZATION_CODE)
.setClientId(clientId)
.setClientSecret(secret)
.setRedirectURI(callback)
.setCode(code)
.buildBodyMessage();
OAuthClient oAuthClient = new OAuthClient(new URLConnectionClient());
//Facebook is not fully compatible with OAuth 2.0 draft 10, access token response is
//application/x-www-form-urlencoded, not json encoded so we use dedicated response class for that
//Own response class is an easy way to deal with oauth providers that introduce modifications to
//OAuth specification
GitHubTokenResponse oAuthResponse = oAuthClient.accessToken(request, GitHubTokenResponse.class);
System.out.println(
"Access Token: " + oAuthResponse.getAccessToken() + ", Expires in: " + oAuthResponse
.getExpiresIn());
} catch (OAuthProblemException e) {
System.out.println("OAuth error: " + e.getError());
System.out.println("OAuth error description: " + e.getDescription());
}
}
}
When I run this example with the original Facebook credentials, it takes me to a page that allows authentication. When I use my rails app, I get a url of the form:
http://smoke-track.herokuapp.com/oauth/authorize?response_type=code&redirect_uri=http%3A%2F%2Flocalhost%3A8080&client_id=728ad798943fff1afd90e79765e9534ef52a5b166cfd25f055d1c8ff6f3ae7fd
When I enter this in the browser I am forwarded to the redirect uri followed by:
?code=6d09201b18178ee7737fcdd330563143ef0b60855e9d06621dcec627a9c3f29a
When I enter the code at the prompt, I get the following errors:
OAuth error: invalid_request
OAuth error description: Missing parameters: access_token
I don't get that error when authenticating against Facebook. Any ideas as to what I am doing wrong?

Answer 1

you might try to use OAuthJSONAccessTokenResponse rather than GitHubTokenResponse