New Problem with login using google in OpenID Connect return Invalid Id Token that print invalid payload

[Carl Andin Michel Sanon]

Hi Everyone,
                 We have our web application under Appengine server that's worked very well since April 2016, now users can't connect because of invalid id token from google. I try to see what change the developer from google has made, I can't see. Here is a log from google below that's print My payload finish with an "?". Someone has already found this problem?. I need your help please because users can't connect .
Best Regards.

[s~xxxxx/v1-0-4.396821290758257501].<stdout>: {"iss":"accounts.google.com","iat":1478529880,"exp":1478533480,"at_hash":"0gp2l3j9SSSI0cUDuYAJ-w","aud":"xxxxx.apps.googleusercontent.com","sub":"103993690248691064163","email_verified":true,"azp":"xxxxxxxx.apps.googleusercontent.com","hd":"xxxx.gouv.ht","email":"x...@gmail.com"B'?

[Adam (Cloud Platform Support)]

Could you share the details about how you're making the request that produces the invalid token?

[s~xxxxx/v1-0-4.396821290758257501].<stdout>: {"iss":"accounts.google.com","iat":1478529880,"exp":1478533480,"at_hash":"0gp2l3j9SSSI0cUDuYAJ-w","aud":"xxxxx.apps.googleusercontent.com","sub":"103993690248691064163","email_verified":true,"azp":"xxxxxxxx.apps.googleusercontent.com","hd":"xxxx.gouv.ht","email":"xxx...@gmail.com"B'?

[Carl Andin Michel Sanon]

Hi Adam
            Thanx for your support.
            This is the detail of my process : I have
            1- A jsp for login that contains this form
                   <form action="https://accounts.google.com/o/oauth2/auth" method="get" name="loginForm">
                        <input type="hidden" name="response_type" value="token id_token" />
                        <input type="hidden" name="client_id" value="xxxxxx.apps.googleusercontent.com" />
                        <input type="hidden" name="redirect_uri" value="http://xxxxxxxx.appspot.com/xxxx.jsp" />
                        <input type="hidden" name="scope" value="openid email" />
                        <input type="hidden" name="access_type" value="online" />
                        <input type="hidden" name="approval_prompt" value="auto" />
                        <input type="hidden" name="openid.realm" value="http://xxxxxxxxx.appspot.com/" />
                  </form>
               When we submit the form above I receive the response that contains the id_token in the page xxxx.jsp

             2-  In the page xxxxx.jsp I use this function below to retrieve the email
                  public String getEmailFromURL(String idToken){
                       System.out.println(idToken);
                       String[] jwtParts = idToken.split("\\.");
                       String payload = "";
                      JSONObject json = null;
                      payload = new String( Base64.decode(jwtParts[1].getBytes()));
                      System.out.println(payload);
                      //logger.info("Payload: "+payload);
                      //json = (JSONObject) JSONValue.parse(payload);\
                     String email = getEmail(payload);
                     if(payload!=null)
                     System.out.println(email);
                     //logger.info("Email: "+json.get("email"));   
                      return email;
                }

                 Remember that its worked very well since April 2016, but on October 22, 2016 Its not working, because the id_token is invalid. The statement "System.out.println(payload);" that's print the payload with an ? in the console of the cloud.

Best Regards.

On Monday, November 7, 2016 at 11:15:13 AM UTC-5, Carl Andin Michel Sanon wrote:

[s~xxxxx/v1-0-4.396821290758257501].<stdout>: {"iss":"accounts.google.com","iat":1478529880,"exp":1478533480,"at_hash":"0gp2l3j9SSSI0cUDuYAJ-w","aud":"xxxxx.apps.googleusercontent.com","sub":"103993690248691064163","email_verified":true,"azp":"xxxxxxxx.apps.googleusercontent.com","hd":"xxxx.gouv.ht","email":"xxx...@gmail.com"B'?

[Adam (Cloud Platform Support)]

What does the raw response look like before you parse out the payload? In the interest of troubleshooting, have you tested the request and response using a plain servlet instead of a form and JSP?