Understanding sessionToken functionality and enabling multiple device logins for a single user simultaneously in Parse

Is there a way to stay logged in as the same user on multiple devices? I have an Android app and a web app and would like to be able to be logged in on both simultaneously. However, when I try to do so, I am receiving an error message 209 stating "invalid session token." Can anyone provide insight into this error and suggest a solution? Thank you!

Answer №1

After troubleshooting, I managed to resolve the issue by identifying and handling Parse errors using the following code snippet:

function handleParseError(err) {
  switch (err.code) {
    case Parse.Error.INVALID_SESSION_TOKEN:
      var currentUser = Parse.User.current();
      var query = new Parse.Query(Parse.User);
      var username = currentUser.get("username");
      var codeEntry;
      query.equalTo("username", username);
        query.first().then(function(result) {
          codeEntry = result.get("codeEntry");
      });

      Parse.User.logOut();

      Parse.Cloud.run("logIn", {"username": username, "codeEntry": codeEntry});
      break;
  }
}

In essence, in the event of an invalid session token, I retrieve the username along with the codeEntry (this application is designed for AnyPhone). Subsequently, I perform a user logout using Parse.User.logOut() followed by executing a Cloud Code function named logIn using Parse.Cloud.run():

Parse.Cloud.define("logIn", function(request, response) {
    Parse.Cloud.useMasterKey();
    var phoneNumber = request.params.phoneNumber;
    phoneNumber = phoneNumber.replace(/\D/g, '');

   if (phoneNumber && request.params.codeEntry) {
       Parse.User.logIn(phoneNumber, request.params.codeEntry).then(function (user) {
           response.success(user.getSessionToken());
        }, function (error) {
           response.error(error);
       });
    } else {
      response.error('Invalid parameters.');
    }
});

With these implementations, everything now functions seamlessly!

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