Android: GoogleIdTokenVerifier.Builder'deki taşıma ve jsonFactory nedir? Darbe kodunda

Question

, transport ve jsonFactory nedir?

https://developers.google.com/identity/sign-in/android/backend-auth#using-a-google-api-client-library

import com.google.api.client.googleapis.auth.oauth2.GoogleIdToken; 
import com.google.api.client.googleapis.auth.oauth2.GoogleIdToken.Payload; 
import com.google.api.client.googleapis.auth.oauth2.GoogleIdTokenVerifier; 

... 

GoogleIdTokenVerifier verifier = new GoogleIdTokenVerifier.Builder(transport /**Here**/, jsonFactory /**Here**/) 
.setAudience(Arrays.asList(CLIENT_ID)) 
// If you retrieved the token on Android using the Play Services 8.3 API or newer, set 
// the issuer to "https://accounts.google.com". Otherwise, set the issuer to 
// "accounts.google.com". If you need to verify tokens from multiple sources, build 
// a GoogleIdTokenVerifier for each issuer and try them both. 
.setIssuer("https://accounts.google.com") 
.build(); 

// (Receive idTokenString by HTTPS POST) 

GoogleIdToken idToken = verifier.verify(idTokenString); 
if (idToken != null) { 
    Payload payload = idToken.getPayload(); 

    // Print user identifier 
    String userId = payload.getSubject(); 
    System.out.println("User ID: " + userId); 

    // Get profile information from payload 
    String email = payload.getEmail(); 
    boolean emailVerified = Boolean.valueOf(payload.getEmailVerified()); 
    String name = (String) payload.get("name"); 
    String pictureUrl = (String) payload.get("picture"); 
    String locale = (String) payload.get("locale"); 
    String familyName = (String) payload.get("family_name"); 
    String givenName = (String) payload.get("given_name"); 

    // Use or store profile information 
    // ... 

} else { 
    System.out.println("Invalid ID token."); 
} 

Answer 1

GoogleIdTokenVerifier.Buildertransport bunu vermek ile tokeninfo endpoint istekte bulunur ve yanıtı ayrıştırmak için bir ayrıştırıcı oluşturmak için JSONFactory kullanacağı bir GoogleIdTokenVerifier döndürür (Anlamadım). İşte

GoogleIdTokenVerifier.Builder

public class GoogleAuthenticator implements Authenticator { 

    private static final Logger log = Logger.getLogger(GoogleAuthenticator.class.getName()); 
    private static final JacksonFactory jacksonFactory = new JacksonFactory(); 

    // From: https://developers.google.com/identity/sign-in/android/backend-auth#using-a-google-api-client-library 
    // If you retrieved the token on Android using the Play Services 8.3 API or newer, set 
    // the issuer to "https://accounts.google.com". Otherwise, set the issuer to 
    // "accounts.google.com". If you need to verify tokens from multiple sources, build 
    // a GoogleIdTokenVerifier for each issuer and try them both. 

    GoogleIdTokenVerifier verifierForNewAndroidClients = new GoogleIdTokenVerifier.Builder(UrlFetchTransport.getDefaultInstance(), jacksonFactory) 
      .setAudience(Arrays.asList(CRLConstants.IOS_CLIENT_ID, CRLConstants.ANDROID_CLIENT_ID_RELEASE, CRLConstants.ANDROID_CLIENT_ID_DEBUG)) 
      .setIssuer("https://accounts.google.com") 
      .build(); 

    GoogleIdTokenVerifier verifierForOtherClients = new GoogleIdTokenVerifier.Builder(UrlFetchTransport.getDefaultInstance(), jacksonFactory) 
      .setAudience(Arrays.asList(CRLConstants.IOS_CLIENT_ID, CRLConstants.ANDROID_CLIENT_ID_RELEASE, CRLConstants.ANDROID_CLIENT_ID_DEBUG)) 
      .setIssuer("accounts.google.com") 
      .build(); 

    // Custom Authenticator class for authenticating google accounts 
    @Override 
    public User authenticate(HttpServletRequest request) { 

     String token = request.getHeader("google_id_token"); 
     if (token != null) { 

      GoogleIdToken idToken = null; 
      try { 
       idToken = verifierForNewAndroidClients.verify(token); 
       if(idToken == null) idToken = verifierForOtherClients.verify(token); 

       if (idToken != null) { 

        GoogleIdToken.Payload payload = idToken.getPayload(); 

        // Get profile information from payload 
        String userId = payload.getSubject(); 
        String email = payload.getEmail(); 

        return new GoogleUser(userId, email); 

       } else { 
        log.warning("Invalid Google ID token."); 
       } 

      } catch (GeneralSecurityException e) { 
       log.warning(e.getLocalizedMessage()); 
      } catch (IOException e) { 
       log.warning(e.getLocalizedMessage()); 
      } 

     } 

     return null; 
    } 

} 

kullanan bir Cloud Endpoints proje için bir kimlik doğrulayıcı bir örnektir