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POGoogle Drive invalid credentials
 

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  1. POGoogle Drive invalid credentials
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    <p>I am using GAE for java and trying to read files from google drive using apis. I used the standard implementation from DrEdit. I have a servlet which authenticate with my account and store the credentials using the following snippet:</p> <pre><code> protected void handleCallbackIfRequired(HttpServletRequest req, HttpServletResponse resp) throws IOException { String code = req.getParameter("code"); System.out.println("Code:" + code); if (code != null) { // retrieve new credentials with code Credential credential = credentialManager.retrieve(code); credentialManager.save(id, credential); System.out.println("access token:" + credential.getAccessToken()); System.out.println("refresh token:" + credential.getRefreshToken()); resp.sendRedirect("/"); } </code></pre> <p>}</p> <pre><code> public Credential retrieve(String code) { System.out.println("Passed code to retrieve is:" + code); try { GoogleTokenResponse response = new GoogleAuthorizationCodeTokenRequest( transport, jsonFactory, clientSecrets.getWeb().getClientId(), clientSecrets.getWeb().getClientSecret(), code, clientSecrets.getWeb().getRedirectUris().get(0)).execute(); Credential cred = buildEmpty(); cred.setRefreshToken(response.getRefreshToken()); cred.setAccessToken(response.getAccessToken()); return cred; } catch (IOException e) { new RuntimeException("An unknown problem occured while retrieving token"); } return null; } } </code></pre> <p>Code for saving the accessToken &amp; refreshToken:</p> <pre><code>protected void handleCallbackIfRequired(HttpServletRequest req, HttpServletResponse resp) throws IOException { String code = req.getParameter("code"); System.out.println("Code:" + code); if (code != null) { // retrieve new credentials with code Credential credential = credentialManager.retrieve(code); credentialManager.save(id, credential); System.out.println("access token:" + credential.getAccessToken()); System.out.println("refresh token:" + credential.getRefreshToken()); resp.sendRedirect("/"); } } </code></pre> <p>After this I am expecting the GAE to retrieve my credentials automatically each time and let me call the drive apis. However, I am seeing below message in my logs. So, I am not sure why that is happening. Please note that the authorization url i created includes offline scope.</p> <pre><code> "code" : 401, "errors" : [ { "domain" : "global", "location" : "Authorization", "locationType" : "header", "message" : "Invalid Credentials", "reason" : "authError" } ], "message" : "Invalid Credentials" } </code></pre> <p>Logs after forcing a fresh reauthentication:</p> <pre><code>2013-09-08 22:51:28.512 [s~sakshumweb-hrd/3.370083570818804963].&lt;stdout&gt;: Code:4/jYpKc6Mit2_0OTgR7dhpve0YGQCG.UoLMhsf6Fd4SEnp6UAPFm0GoUpACggI I 2013-09-08 22:51:28.512 [s~sakshumweb-hrd/3.370083570818804963].&lt;stdout&gt;: Passed code to retrieve is:4/jYpKc6Mit2_0OTgR7dhpve0YGQCG.UoLMhsf6Fd4SEnp6UAPFm0GoUpACggI I 2013-09-08 22:51:29.423 [s~sakshumweb-hrd/3.370083570818804963].&lt;stdout&gt;: access token:ya29.AHES6ZS3x8fPpq5G9YHmIvFHE098izZ0zyn7BCnZRDhYf3zdA-qNDtw I 2013-09-08 22:51:29.424 [s~sakshumweb-hrd/3.370083570818804963].&lt;stdout&gt;: refresh token:null I 2013-09-08 22:51:29.450 [s~sakshumweb-hrd/3.370083570818804963].&lt;stdout&gt;: authorization url:https://accounts.google.com/o/oauth2/auth?access_type=offline&amp;approval_prompt=auto&amp;client_id=955443778501.apps.googleusercontent.com&amp;redirect_uri=http://www.sakshum.org/GoogleOauth&amp;response_type=code&amp;scope=https://www.googleapis.com/auth/drive.readonly%20https://www.googleapis.com/auth/userinfo.email%20https://www.googleapis.com/auth/userinfo.profile </code></pre>
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    1. CO401 means the access token is invalid. You should check your code to see you are correctly obtaining and, where necessary, refreshing the access token.
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    2. COThanks! for me refresh token comes null all the time. The code I am using is added above.
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    3. COThe refresh token is only provided once. Subsequently it will be null. You might need to "force" re authorisation.
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