Make sure to use DataStoreCredentialRefreshListener and set it for the credential using (CredentialRefreshListener)). Expired access tokens will automatically be refreshed using the refresh token (if applicable). Access protected resources using the GoogleCredential.Create a new GoogleCredential and store it using t(String, V).Use GoogleAuthorizationCodeTokenRequest to request an access token and possibly a refresh token.Use AuthorizationCodeResponseUrl to process the authorization response and parse the authorization code.Use GoogleAuthorizationCodeRequestUrl to direct the browser to the authorization page.Use DataStore.get(String) to load the credential from the store based on the user ID.To store and obtain a credential for accessing protected resources.Īlternatively, if you are not using GoogleAuthorizationCodeFlow, you may use the lower-level classes: Use AuthorizationCodeFlow.createAndStoreCredential(TokenResponse, String)).Use the code parameter to request an access token usingĪuthorizationCodeFlow.newTokenRequest(String)). Redirect URL specified by your application, along with a code query The Google authorization server will then redirect the browser back to the.If not, call AuthorizationCodeFlow.newAuthorizationUrl()Īnd direct the end-user's browser to an authorization page to grant yourĪpplication access to their protected data.Call AuthorizationCodeFlow.loadCredential(String))īased on the user ID to check if the end-user's credentials are already known.With a user ID that is unique for your application. This flow is implemented using GoogleAuthorizationCodeFlow. Use the authorization code flow to allow the end-user to grant your applicationĪccess to their protected data on Google APIs. If you have credentials stored in the old fashion, you can use the addedĪnd set it for the credential using (CredentialRefreshListener)). "persists" the credential in memory, which is only useful as a short-term storage for the lifetime of the process.ĪppEngine Users: AppEngineCredentialStore Persists the credential using the Google App Engine Data Store API. Or you can use one of the following implementations provided by the library: Provide your own implementation of DataStoreFactory To persist the credential's access and/or refresh tokens, you can Most applications will need to persist the credential's access token and/or Is typically received along with the access token if you use theĪccess_type=offline parameter during the authorization code flow (see This is done by means of a long-lived refresh token, which Takes care of automatically "refreshing" the token, which simply means gettingĪ new access token. Return new Urlshortener.Builder(new UrlFetchTransport(),Īn access token typically has an expiration date of 1 hour, after which you will You only specify the OAuth 2.0 scope you need.Įxample code taken from urlshortener-robots-appengine-sample:Ĭollections.singletonList(UrlshortenerScopes.URLSHORTENER)) This credential is much simpler because Google App Engine takes care of all of Unlike the credential in which a client application requests access to anĮnd-user's data, the App Identity API provides access to the client This alternative credential is based on the setApplicationName("Google-PlusSample/1.0") Plus plus = new Plus.builder(new NetHttpTransport(), GoogleCredential credential = new GoogleCredential().setAccessToken(accessToken) For example, if you already have an access token, you Is a thread-safe helper class for OAuth 2.0 for accessing protected resources Purposes, whether your client is an installed application, a mobile application,Ī web server, or a client that runs in browser.įor instructions on setting up your credentials properly, see theĪPI Console Help. .oauth2īefore you can access Google APIs, you need to set up a project on the.Google OAuth 2.0 Client Library for Java.įor details, see the Javadoc documentation for the following packages: The OAuth 2.0 packages in the Google API Client Library for Java are built on An important goal for OAuth 2.0 is to provide secure andĬonvenient access to the protected data, while minimizing the potential impact The access token is also associated with a limited scope thatĭefines the kind of data your client application has access to (for example In all of these flows, the client application requests an access token that isĪssociated with only your client application and the owner of the protected dataīeing accessed. Google APIs support OAuth 2.0 flows for different types of client applications. ![]() Summary: To access protected data stored on Google services, use OAuth 2.0 and the Google OAuth Client Library for Java. Information about the generic OAuth 2.0 functions that we provide, see Utility class to do OAuth 2.0 authorization with Google services. Purpose: This document explains how to use the
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