由於Google任務沒有公開API,我想要像瀏覽器一樣編寫解決方法和請求數據,然後解析結果以進一步顯示。Android:使用OAuth訪問Google任務時出現問題
訪問數據,我已經實現與谷歌OAuth認證訪問此網址:https://mail.google.com/
是OAuth我已經使用登錄後庫,它工作得很好。
問題是當我試圖訪問帶簽名請求的https://mail.google.com/tasks/ig時,它返回了我的登錄頁面而不是任務所需的列表。
更具體地講,這裏是我的代碼:
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OAuth的階段
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OAuth的階段,並嘗試訪問谷歌的任務
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;
}
}
在這line:
String xml = ConvertUtils.convertStreamToString(response.getEntity().getContent(), true);
Log.d(TAG, "XML = " + xml);
我可以看到,我收到「登錄頁」
我想原因是,谷歌不提供訪問該服務,甚至我已經通過OAuth認證它限制了我的這個資源訪問(即使我已將範圍定義爲https://mail.google.com/)。我不知道如何實現它,但它看起來像我需要模擬瀏覽器究竟如何與谷歌互動(檢索和發送適當的coockies)。但我問,因爲我不知道如何處理這種情況,因爲正如我所提到的谷歌任務API沒有公共API(肥皂,休息或任何其他),所以這對我來說並不明顯如何爲此實現客戶端功能...
如果有人有應用程序訪問谷歌資源沒有公共API的例子,我會很高興看到這一點。
謝謝,嗨,有人知道答案!
是的,現在有一個API ......限於每5000要求除非你願意付錢。無論是來自您的應用程序的收入都可以支付成本,還是JSON仍然是您的選擇。 – RedGlyph 2013-03-19 21:13:24