Provisioning Api using java

Question

Hi i'm working in java and tried to retrieve all the user in the domain for that i used Provisionin api............ Its working good But my idea is to Use 2-legged OAuth to retrieve the users from the domain Is it Possible? I don't how to specify the URL please Help me And i tried the following the program

    final String CONSUMER_KEY = "example.com";
    final String CONSUMER_SECRET = "12345678122154154df9";
    final String DOMAIN = "example.com";
    GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters();
    oauthParameters.setOAuthConsumerKey(CONSUMER_KEY);
    oauthParameters.setOAuthConsumerSecret(CONSUMER_SECRET);
    oauthParameters.setOAuthType(OAuthType.TWO_LEGGED_OAUTH);
    OAuthHmacSha1Signer signer = new OAuthHmacSha1Signer();
    URL feedUrl = new URL("https://apps-apis.google.com/a/feeds/" + DOMAIN + 
      "/user/2.0/[email protected]");
userService = new UserService("Myapplication");
    userService.setOAuthCredentials(oauthParameters, signer);
    userService.useSsl();
    UserFeed allUsers = new UserFeed();
       UserFeed allpage;
      Link nextLink;


do {
  allpage = userService.getFeed(feedUrl, UserFeed.class);

  allUsers.getEntries().addAll(allpage.getEntries());

  nextLink = allpage.getLink(Link.Rel.NEXT, Link.Type.ATOM);
  if (nextLink != null) {
    feedUrl = new URL(nextLink.getHref());
   }

}while (nextLink != null);
return allUsers;
 }

Its returing the error as com.google.gdata.util.AuthenticationException: Unknown authorization header

Anirudh · Accepted Answer · 2011-04-26 00:15:37Z

    // use real values.
    final String CONSUMER_KEY = "example.com";
    final String CONSUMER_SECRET = "secret-here";
    final String DOMAIN = "domain.com";

    GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters();
    oauthParameters.setOAuthConsumerKey(CONSUMER_KEY);
    oauthParameters.setOAuthConsumerSecret(CONSUMER_SECRET);
    oauthParameters.setOAuthType(OAuthType.TWO_LEGGED_OAUTH);
    OAuthHmacSha1Signer signer = new OAuthHmacSha1Signer();

    URL feedUrl = new URL("https://apps-apis.google.com/a/feeds/" + DOMAIN + "/user/2.0");

    UserService service = new UserService("ProvisiongApiClient");
    service.setOAuthCredentials(oauthParameters, signer);
    service.useSsl();
    UserFeed resultFeed = service.getFeed(feedUrl, UserFeed.class);

    for (UserEntry entry : resultFeed.getEntries()) {
      System.out.println(entry.getTitle().getPlainText());
    }

2-Legged OAuth for Google Apps APIs is special in the sense that it is user-less. You don't need [email protected]. An admin can authorize clients from https://www.google.com/a/cpanel/<your domain>/ManageOauthClients

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