Support for OAuth 2.0 draft 10 is deprecated. Instead, please use the latest draft of OAuth 2.0.

OAuth 2.0 draft 10 is one of the supported authentication methods in this library.

• Overview
• Sample Program

Overview

We support the following end user authorization schemes from OAuth 2.0 draft 10:

• Web Server
• Native Application

Please read implementation details in the OAuth 2.0 draft 10 JavaDoc.

For more details on OAuth 2.0 draft 10 in general, please read the specification.

Sample Program

Note that you must manually fill in the client ID and secret in order for this sample to work. Otherwise, you will likely get a "401 Unauthorized" or "400 Bad Request" error message. Please create your own project and an "install application" client ID and secret at the Google APIs Console. You must also enabled the "URL Shortener API" under the "Services" tab or else you will get a "403 Forbidden":

package com.google.sample;

import com.google.api.client.auth.oauth2.draft10.AccessTokenResponse;
import com.google.api.client.googleapis.auth.oauth2.draft10.GoogleAccessProtectedResource;
import com.google.api.client.googleapis.auth.oauth2.draft10.GoogleAccessTokenRequest.GoogleAuthorizationCodeGrant;
import com.google.api.client.googleapis.auth.oauth2.draft10.GoogleAuthorizationRequestUrl;
import com.google.api.client.http.ByteArrayContent;
import com.google.api.client.http.GenericUrl;
import com.google.api.client.http.HttpRequest;
import com.google.api.client.http.HttpRequestFactory;
import com.google.api.client.http.HttpResponse;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson.JacksonFactory;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class UrlShortenerTest {
  private static final String SCOPE = "https://www.googleapis.com/auth/urlshortener";
  private static final String CALLBACK_URL = "urn:ietf:wg:oauth:2.0:oob";
  private static final HttpTransport TRANSPORT = new NetHttpTransport();
  private static final JsonFactory JSON_FACTORY = new JacksonFactory();

  // FILL THESE IN WITH YOUR VALUES FROM THE API CONSOLE
  private static final String CLIENT_ID = "<REPLACE ME>";
  private static final String CLIENT_SECRET = "<REPLACE ME TOO!>";

  public static void main(String[] args) throws IOException {
    // Generate the URL to which we will direct users
    String authorizeUrl = new GoogleAuthorizationRequestUrl(CLIENT_ID,
        CALLBACK_URL, SCOPE).build();
    System.out.println("Paste this url in your browser: " + authorizeUrl);

    // Wait for the authorization code
    System.out.println("Type the code you received here: ");
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
    String authorizationCode = in.readLine();

    // Exchange for an access and refresh token
    GoogleAuthorizationCodeGrant authRequest = new GoogleAuthorizationCodeGrant(TRANSPORT,
        JSON_FACTORY, CLIENT_ID, CLIENT_SECRET, authorizationCode, CALLBACK_URL);
    authRequest.useBasicAuthorization = false;
    AccessTokenResponse authResponse = authRequest.execute();
    String accessToken = authResponse.accessToken;
    GoogleAccessProtectedResource access = new GoogleAccessProtectedResource(accessToken,
        TRANSPORT, JSON_FACTORY, CLIENT_ID, CLIENT_SECRET, authResponse.refreshToken);
    HttpRequestFactory rf = TRANSPORT.createRequestFactory(access);
    System.out.println("Access token: " + authResponse.accessToken);

    // Make an authenticated request
    GenericUrl shortenEndpoint = new GenericUrl("https://www.googleapis.com/urlshortener/v1/url");
    String requestBody =
        "{\"longUrl\":\"http://farm6.static.flickr.com/5281/5686001474_e06f1587ff_o.jpg\"}";
    HttpRequest request = rf.buildPostRequest(shortenEndpoint,
        ByteArrayContent.fromString("application/json", requestBody))
    HttpResponse shortUrl = request.execute();
    BufferedReader output = new BufferedReader(new InputStreamReader(shortUrl.getContent()));
    System.out.println("Shorten Response: ");
    for (String line = output.readLine(); line != null; line = output.readLine()) {
      System.out.println(line);
    }

    // Refresh a token (SHOULD ONLY BE DONE WHEN ACCESS TOKEN EXPIRES)
    access.refreshToken();
    System.out.println("Original Token: " + accessToken + " New Token: " + access.getAccessToken());
  }
}