Google App Engine のスタートガイドで作成しているゲストブックのフォームにポストするサンプルです。
- App Engine for Java の概要 - Google App Engine - Google Code
- プロジェクトの作成 - Google App Engine - Google Code
以前のソースはActivityクラスにコードを記載してましたが、もう少し汎用的なクラスを作成しました。
GoogleServiceAuthenticator
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| public class GoogleServiceAuthenticator { | |
| public static final String ACCOUNT_TYPE = "com.google"; | |
| public enum GOOGLE_ACCOUNT_TYPE { | |
| APPENGINE { public String toString() { return "ah"; } }, | |
| } | |
| public interface PostExecuteCallback { | |
| void run(String acsid); | |
| } | |
| private Context context; | |
| private AccountManager accountManager; | |
| private String hostname; | |
| private String appPath; | |
| private PostExecuteCallback postExecuteCallback; | |
| private DefaultHttpClient httpClient = new DefaultHttpClient(); | |
| public GoogleServiceAuthenticator(Context context) { | |
| this.context = context; | |
| } | |
| public Account[] getGoogleAccounts() { | |
| if (accountManager == null) { | |
| accountManager = AccountManager.get(context); | |
| } | |
| return accountManager.getAccountsByType(ACCOUNT_TYPE); | |
| } | |
| public void execute(Account account, GOOGLE_ACCOUNT_TYPE type, PostExecuteCallback postExecuteCallback) throws Exception { | |
| if (hostname == null) { | |
| throw new Exception("hostname must not be null"); | |
| } | |
| if (appPath == null) { | |
| throw new Exception("appPath must not be null"); | |
| } | |
| this.postExecuteCallback = postExecuteCallback; | |
| // Gets an auth token of the specified type. | |
| accountManager.getAuthToken( | |
| account, // The account to fetch an auth token for | |
| type.toString(), // The auth token type, an authenticator-dependent string token, must not be null | |
| false, // True to add a notification to prompt the user for a password if necessary, false to leave that to the caller | |
| new GetAuthTokenCallback(), // Callback to invoke when the request completes, null for no callback | |
| null // Handler identifying the callback thread, null for the main thread | |
| ); | |
| } | |
| public void setHostname(String hostname) { | |
| this.hostname = hostname; | |
| } | |
| public void setAppPath(String appPath) { | |
| this.appPath = appPath; | |
| } | |
| private String getLoginUrl(String hostname, String appPath, String authToken) { | |
| return "https://" + hostname + "/_ah/login?continue=" + appPath + "&auth=" + authToken; | |
| } | |
| private class GetAuthTokenCallback implements AccountManagerCallback<Bundle> { | |
| @Override | |
| public void run(AccountManagerFuture<Bundle> result) { | |
| Bundle bundle; | |
| try { | |
| bundle = result.getResult(); | |
| Intent intent = (Intent)bundle.get(AccountManager.KEY_INTENT); | |
| if(intent != null) { | |
| // User input required | |
| context.startActivity(intent); | |
| } else { | |
| String acsid = getAuthToken(bundle); | |
| // If authentication succeeds and gets the SACSID/ACSID, the post-process is called. | |
| if (acsid != null) { | |
| if (postExecuteCallback != null) { | |
| postExecuteCallback.run(acsid); | |
| } | |
| } | |
| } | |
| } catch (OperationCanceledException e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } catch (AuthenticatorException e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } catch (IOException e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } | |
| } | |
| }; | |
| private String getAuthToken(Bundle bundle) { | |
| boolean validated = false; | |
| int count = 3; | |
| try { | |
| while (!validated) { | |
| String authToken = bundle.getString(AccountManager.KEY_AUTHTOKEN); | |
| httpClient.getParams().setBooleanParameter(ClientPNames.HANDLE_REDIRECTS, false); | |
| String uri = getLoginUrl(hostname, appPath, authToken); | |
| HttpGet httpGet = new HttpGet(uri); | |
| HttpResponse httpResponse = httpClient.execute(httpGet); | |
| int status = httpResponse.getStatusLine().getStatusCode(); | |
| if (status == HttpStatus.SC_INTERNAL_SERVER_ERROR) { | |
| // Authenticate error (500) | |
| try { | |
| StringBuilder buf = new StringBuilder(); | |
| buf.append(String.format("Status:%d ", status)); | |
| InputStream in = httpResponse.getEntity().getContent(); | |
| BufferedReader reader = new BufferedReader(new InputStreamReader(in)); | |
| String l = null; | |
| while ((l = reader.readLine()) != null) { | |
| buf.append(l + "\n"); | |
| } | |
| Log.w(TAG, buf.toString()); | |
| } catch (Exception e) { | |
| } | |
| // Removes an auth token from the AccountManager's cache. | |
| String accountType = bundle.getString(AccountManager.KEY_ACCOUNT_TYPE); | |
| accountManager.invalidateAuthToken(accountType, authToken); | |
| } else { | |
| // Authenticate success | |
| validated = true; | |
| break; | |
| } | |
| // retry count down | |
| if (0 < count--) { | |
| break; | |
| } | |
| } | |
| // If authentication succeeds, get the SACSID/ACSID from the Cookie | |
| if (validated) { | |
| for (Cookie cookie : httpClient.getCookieStore().getCookies()) { | |
| if ("SACSID".equals(cookie.getName()) || "ACSID".equals(cookie.getName())) { | |
| return cookie.getName() + "=" + cookie.getValue(); | |
| } | |
| } | |
| } | |
| } catch (ClientProtocolException e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } catch (IOException e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } | |
| return null; | |
| } | |
| } |
- コンストラクタにはContextを指定してます。
- getGoogleAccounts() で、アカウントリストを取得できます。
- execute()で、認証を実行してます。
- 引数 accountには、リストから選ばられた一意のアカウントを指定します。typeは、Googleのアカウントタイプ(AppEngineの場合は"ah")。postExecuteCallbackには、認証終了後にコールしたいクラスを指定します。
- AccountManagerのgetAuthTokenを呼び出します。
- GetAuthTokenCallbackをcallbackに指定してます。
- GetAuthTokenCallbackのrun()の認証処理の実態のgetAuthToken()を呼び出してます。
- getAuthToken()では、認証処理を失敗時のリトライのためにループさせてます。
- getLoginUrl()を呼び出して、アプリのUrlを作成。
- https://yourappl.appspot.com/_ah/login?continue=http://localhost/&auth=[authToken]
- authTokenは、AccountManagerから取得した文字列を指定してます。
- urlを読んで、レスポンスを取得。
- 取得したレスポンスが500の場合、AccountManagerのキャッシュからauthTokenを削除して、リトライをさせてます。
- 認証に成功したら、Cookieから、ASCID または、SACSIDを取得します。
- httpsで認証した場合は、SACSID、httpの場合は、ASCIDが取得できます。
- その後、postExecuteCallbackを実行させてます。
- postExecuteCallback内で、App Engineにアクセスするときに、Http Headerの CookieにASCID/SACSIDをセットする必要があります。
Activityの実装例
GoogleServiceAuthExampleActivity
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| public class GoogleServiceAuthExampleActivity extends ListActivity { | |
| private static final String TAG = GoogleServiceAuthExampleActivity.class.getName(); | |
| GoogleServiceAuthenticator authenticator; | |
| @Override | |
| public void onCreate(Bundle savedInstanceState) { | |
| super.onCreate(savedInstanceState); | |
| authenticator = new GoogleServiceAuthenticator(this); | |
| Account[] accounts = authenticator.getGoogleAccounts(); | |
| this.setListAdapter(new ArrayAdapter<Account>(this, android.R.layout.simple_list_item_1, accounts)); | |
| } | |
| @Override | |
| protected void onListItemClick(ListView l, View v, int position, long id) { | |
| Account account = (Account)getListView().getItemAtPosition(position); | |
| authenticator.setHostname("yourappl.appspot.com"); | |
| authenticator.setAppPath("http://localhost/"); | |
| try { | |
| authenticator.execute(account, GOOGLE_ACCOUNT_TYPE.APPENGINE, | |
| new GoogleServiceAuthenticator.PostExecuteCallback() { | |
| @Override | |
| public void run(String acsid) { | |
| DefaultHttpClient httpClient = new DefaultHttpClient(); | |
| HttpPost httpPost = new HttpPost("http://yourappl.appspot.com/sign"); | |
| HttpResponse httpResponse = null; | |
| try { | |
| List<BasicNameValuePair> parms = new ArrayList<BasicNameValuePair>(); | |
| parms.add(new BasicNameValuePair("content", "InputData=" + new SimpleDateFormat().format(new Date()) )); | |
| httpPost.setEntity(new UrlEncodedFormEntity(parms, HTTP.UTF_8)); | |
| httpPost.setHeader("Cookie", acsid); | |
| httpResponse = httpClient.execute(httpPost); | |
| } catch (UnsupportedEncodingException e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } catch (ClientProtocolException e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } catch (IOException e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } | |
| if (httpResponse != null) { | |
| int status = httpResponse.getStatusLine().getStatusCode(); | |
| StringBuilder buf = new StringBuilder(); | |
| buf.append(String.format("status:%d", status)); | |
| try { | |
| InputStream in = httpResponse.getEntity().getContent(); | |
| BufferedReader reader = new BufferedReader(new InputStreamReader(in)); | |
| String l = null; | |
| while((l = reader.readLine()) != null) { | |
| buf.append(l + "\n"); | |
| } | |
| if (status != HttpStatus.SC_OK) { | |
| Log.e(TAG, buf.toString()); | |
| } | |
| } catch(Exception e) { | |
| e.printStackTrace(); | |
| } | |
| (Toast.makeText( | |
| GoogleServiceAuthExampleActivity.this, | |
| buf.toString(), | |
| Toast.LENGTH_LONG)).show(); | |
| Log.d(TAG, buf.toString()); | |
| } | |
| } | |
| }); | |
| } catch (Exception e) { | |
| // TODO Auto-generated catch block | |
| e.printStackTrace(); | |
| } | |
| } | |
| } |
フルプロジェクトはgithubに上げました。
http://github.com/granoeste/GoogleServiceAuthExample
