Android:使用OAuth访问google任务的问题

由于google tasks没有公共api,我想编写解决方案,像浏览器一样请求数据,然后解析结果以进一步显示。

为了访问数据,我使用google实现了OAuth身份验证来访问此url: https://mail.google.com/

对于OAuth,我使用了sign post库,它工作得很好。

问题是当我试图进入 https://mail.google.com/tasks/ig 对于签名请求,它将返回我的登录页,而不是包含任务的所需列表。

更具体地说,这里是我的代码:

public class GoogleOAuthActivity extends Activity {
    private static final String TAG = GoogleOAuthActivity.class.getSimpleName();
    private CommonsHttpOAuthProvider provider;
    private CommonsHttpOAuthConsumer consumer;

    @Override
    @SuppressWarnings("unchecked")
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        provider = new CommonsHttpOAuthProvider(OAuthPrefs.GET_REQUEST_TOKEN_URL, OAuthPrefs.GET_ACCESS_TOKEN_URL,
                OAuthPrefs.TOKEN_AUTHORIZATION_URL);
        consumer = new CommonsHttpOAuthConsumer(OAuthPrefs.CONSUMER_KEY, OAuthPrefs.CONSUMER_SECRET);
        consumer.setMessageSigner(new HmacSha1MessageSigner());

        Log.v(TAG, "Starting google authentication activity");
        new RequestGoogleOAuth(this, provider, consumer).execute();
    }

    @Override
    @SuppressWarnings("unchecked")
    public void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        final Uri uri = intent.getData();
        if (uri != null && uri.getScheme().equals(OAuthPrefs.CALLBACK_SCHEME)) {
            Log.v("OAUTH MAIN", "STARTING STAGE TWO");
            new ConfirmGoogleOAuthTask(this, provider, consumer).execute(uri);
            finish();
        }
    }

}

第一阶段

public class RequestGoogleOAuth extends OAuthGoogleTask {
    public static final String TAG = RequestGoogleOAuth.class.getSimpleName();

    public RequestGoogleOAuth(Context context, CommonsHttpOAuthProvider provider, CommonsHttpOAuthConsumer consumer) {
        super(context, provider, consumer);
    }

    protected Object doInBackground(Object... params) {
        final String TAG = getClass().getName();
        try {
            final String url = provider.retrieveRequestToken(consumer, OAuthPrefs.CALLBACK_URL);
            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url)).setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP
                    & Intent.FLAG_ACTIVITY_NO_HISTORY & Intent.FLAG_FROM_BACKGROUND);
            context.startActivity(intent);
            Log.v(TAG, "Request google authentication");
        } catch (Exception e) {
            Log.e(TAG, "ERROR during google authentication request", e);
        }
        return null;
    }
}

第二个OAuth阶段和访问google任务的尝试

public class ConfirmGoogleOAuthTask extends OAuthGoogleTask {
    public ConfirmGoogleOAuthTask(Context context, CommonsHttpOAuthProvider provider, CommonsHttpOAuthConsumer consumer) {
        super(context, provider, consumer);
    }

    @Override
    public Object doInBackground(Object... params) {
        final Uri uri = (Uri) params[0];
        final String TAG = getClass().getName();

        final SharedPreferences prefs = context.getSharedPreferences(OAuthPrefs.PREF_NAME, Context.MODE_PRIVATE);
        final String oauthVerifier = uri.getQueryParameter(OAuth.OAUTH_VERIFIER);

        try {
            provider.retrieveAccessToken(consumer, oauthVerifier);
            final Editor edit = prefs.edit();
            edit.putString(OAuth.OAUTH_TOKEN, consumer.getToken());
            edit.putString(OAuth.OAUTH_TOKEN_SECRET, consumer.getTokenSecret());
            edit.commit();

            CommonsHttpOAuthConsumer consumer = new CommonsHttpOAuthConsumer(OAuthPrefs.CONSUMER_KEY, OAuthPrefs.CONSUMER_SECRET);
            consumer.setMessageSigner(new HmacSha1MessageSigner());
            consumer.setTokenWithSecret(consumer.getToken(), consumer.getTokenSecret());

            HttpClient httpClient = HttpUtils.createHttpClient();
            HttpGet httpGet = new HttpGet(consumer.sign("https://mail.google.com/tasks/ig"));
            HttpResponse response = httpClient.execute(httpGet);
            int statusCode = response.getStatusLine().getStatusCode();
            Log.d(TAG, "Status code = " + statusCode);
            if (statusCode == HttpStatus.SC_OK) {
                String xml = ConvertUtils.convertStreamToString(response.getEntity().getContent(), true);
                Log.d(TAG, "XML = " + xml);
            }

            Log.v(TAG, "Successfully receive access token");
        } catch (Exception e) {
            Log.e(TAG, "ERROR during request for access token", e);
        }
        return null;
    }
}

在这一行:

String xml = ConvertUtils.convertStreamToString(response.getEntity().getContent(), true);
                    Log.d(TAG, "XML = " + xml);

我可以看到我收到“登录页”

我认为原因是google不提供对这个服务的访问,甚至我已经用OAuth进行了身份验证,它限制了我对这个资源的访问(甚至我定义了 https://mail.google.com/ ). 我现在不知道如何实现它,但看起来我需要模拟浏览器与google的交互方式(检索并发送适当的coockies)。但是我在问,因为我不确定如何处理这种情况,因为正如我所提到的,googletaskapi没有公共API(soap、rest或任何其他API),所以对于我来说,如何实现这个特性的客户端并不明显。。。

如果有人有应用程序访问谷歌资源没有公共API的例子,我将非常高兴看到。

谢谢,希望有人知道答案!