/* Copyright (c) 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package sample.oauth;
import com.google.gdata.client.GoogleService;
import com.google.gdata.client.authn.oauth.GoogleOAuthHelper;
import com.google.gdata.client.authn.oauth.GoogleOAuthParameters;
import com.google.gdata.client.authn.oauth.OAuthHmacSha1Signer;
import com.google.gdata.client.authn.oauth.OAuthSigner;
import com.google.gdata.data.BaseEntry;
import com.google.gdata.data.BaseFeed;
import com.google.gdata.data.Feed;
import java.net.URL;
/**
* Sample application demonstrating how to do 2-Legged OAuth in the Google Data
* Java Client. See the comments below to learn about the details.
*
*
*/
public class TwoLeggedOAuthExample {
public static void main(String[] args) throws Exception {
////////////////////////////////////////////////////////////////////////////
// STEP 1: Gather the user's information
////////////////////////////////////////////////////////////////////////////
// This step collects information from the user, such as the consumer key
// and which service to query. This is just a general setup routine, and
// the method by which you collect user information may be different in your
// implementation.
UserInputHelper inputController =
new TwoLeggedOAuthUserInputHelper();
UserInputVariables variables = inputController.getVariables();
////////////////////////////////////////////////////////////////////////////
// STEP 2: Set up the OAuth objects
////////////////////////////////////////////////////////////////////////////
// You first need to initialize a few OAuth-related objects.
// GoogleOAuthParameters holds all the parameters related to OAuth.
// OAuthSigner is responsible for signing the OAuth base string.
GoogleOAuthParameters oauthParameters = new GoogleOAuthParameters();
// Set your OAuth Consumer Key (which you can register at
// https://www.google.com/accounts/ManageDomains).
oauthParameters.setOAuthConsumerKey(variables.getConsumerKey());
// Initialize the OAuth Signer. 2-Legged OAuth must use HMAC-SHA1, which
// uses the OAuth Consumer Secret to sign the request. The OAuth Consumer
// Secret can be obtained at https://www.google.com/accounts/ManageDomains.
oauthParameters.setOAuthConsumerSecret(variables.getSignatureKey());
OAuthSigner signer = new OAuthHmacSha1Signer();
// Finally create a new GoogleOAuthHelperObject. This is the object you
// will use for all OAuth-related interaction.
GoogleOAuthHelper oauthHelper = new GoogleOAuthHelper(signer);
////////////////////////////////////////////////////////////////////////////
// STEP 3: Make a request to Google
////////////////////////////////////////////////////////////////////////////
// Set the scope for this particular service.
oauthParameters.setScope(variables.getScope());
// Append the "xoauth_requestor_id" parameter to the feed url. This
// parameter indicates which user you are loading the data for.
String feedUrlString = variables.getFeedUrl();
feedUrlString += "?xoauth_requestor_id="
+ variables.getVariable("xoauth_requestor_id");
URL feedUrl = new URL(feedUrlString);
System.out.println("Sending request to " + feedUrl.toString());
System.out.println();
GoogleService googleService =
new GoogleService(variables.getGoogleServiceName(),
"2-legged-oauth-sample-app");
// Set the OAuth credentials which were obtained from the steps above.
googleService.setOAuthCredentials(oauthParameters, signer);
// Make the request to Google
BaseFeed resultFeed = googleService.getFeed(feedUrl, Feed.class);
System.out.println("Response Data:");
System.out.println("=====================================================");
System.out.println("| TITLE: " + resultFeed.getTitle().getPlainText());
if (resultFeed.getEntries().size() == 0) {
System.out.println("|\tNo entries found.");
} else {
for (int i = 0; i < resultFeed.getEntries().size(); i++) {
BaseEntry entry = (BaseEntry) resultFeed.getEntries().get(i);
System.out.println("|\t" + (i + 1) + ": "
+ entry.getTitle().getPlainText());
}
}
System.out.println("=====================================================");
}
}