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POAuthenticate programmatically to Google with OAuth2
 

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    <p>How can I authenticate programmatically to Google? Now that ClientLogin (<a href="https://developers.google.com/accounts/docs/AuthForInstalledApps" rel="noreferrer">https://developers.google.com/accounts/docs/AuthForInstalledApps</a>) is deprecated, how can we perform a programmatic authentication to Google with OAuth2?</p> <p>With ClientLogin we could perform a post to <a href="https://www.google.com/accounts/ClientLogin" rel="noreferrer">https://www.google.com/accounts/ClientLogin</a> with email and password parameters and obtain the authentication token.</p> <p>With OAuth2 i can't find a solution!</p> # <p>My app is a java background process. I saw, following this link: developers.google.com/accounts/docs/OAuth2InstalledApp#refresh, how to obtain a new access token using a refreshed token.</p> <p>The problem is that I can't find a java example about how to instantiate an Analytics object (for example) to perform a query when I have a new valid access token</p> <p>This is my code that returns a 401 Invalid credentials when invoke the "execute()":</p> <pre><code>public class Test { static final String client_id = "MY_CLIENT_ID"; static final String client_secret = "MY_SECRET"; static final String appName = "MY_APP"; private static final HttpTransport HTTP_TRANSPORT = new NetHttpTransport(); private static final JsonFactory JSON_FACTORY = new JacksonFactory(); static String access_token = "xxxx"; static String refreshToken = "yyyyy"; public static void main (String args[]){ try { GoogleCredential credential = new GoogleCredential.Builder() .setTransport(HTTP_TRANSPORT) .setJsonFactory(JSON_FACTORY) .setClientSecrets(client_id, client_secret).build(); credential.setAccessToken(access_token); credential.setRefreshToken(refreshToken); //GoogleCredential Analytics analytics = Analytics.builder(HTTP_TRANSPORT, JSON_FACTORY) .setApplicationName(appName) .setHttpRequestInitializer(credential) .build(); Accounts accounts = analytics.management().accounts().list().execute(); } catch (Exception e) { e.printStackTrace(); } } </code></pre> <p>What is the problem?</p>
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    1. USMatt C
    1. USAndrea Zonzin
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    1. COcould you please post your solution and how it's solved. I am facing same problem
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      1. USReddy
 

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