MySQL database help needed :(

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Fishypants
Posts: 57
Joined: 26 Oct 2010, 14:03
Location: South Pasadena California
Contact:

MySQL database help needed :(

Postby Fishypants » 26 Dec 2010, 22:46

Ok, so I have made a custom login for Unity. And all works good if I have:

1) Correct user name, and password. Login is good!
2) Correct user name, wrong password. Denies login.

Problem arises when I have a WRONG username and or password. I am assuming that when I am querying for a user name and it doesn't find it, the result is null, but it seems that simply checking if the result of the query != null does not work in my case.

Here is my serverside extension:

Code: Select all

// a global variable
var dbase

/*
* Initializion point:
* this function is called as soon as the extension
* is loaded in the server.
* You can add here all the initialization code
*/
function init(){
   trace("Initing dbExtension")

   // get a reference to the database manager object
   // This will let you interact with the database configured for this zone
   dbase = _server.getDatabaseManager()
}

/*
* This method is called by the server when an extension
* is being removed / destroyed.
*
* Always make sure to release resources like setInterval(s)
* open files etc in this method.
*
* In this case we delete the reference to the databaseManager
*/
function destroy(){
   // Release the reference to the dbase manager
   delete dbase
}

/*
* Handle Client Requests
* cmd       = a string with the client command to execute
* params    = list of parameters expected from the client
* user       = the User object representing the sender
* fromRoom    = the id of the room where the request was generated
*/
function handleRequest(cmd, params, user, fromRoom){
}


/*
* This method handles internal events
* Internal events are dispactched by the Zone or Room where the extension is attached to
* the (evt) object
*/
function handleInternalEvent(evt){
   // If there is a login request
   if(evt.name == "loginRequest"){
      trace("CUSTOM LOGIN EVENT RECIEVED");

      // Store email and password from client
      var nick = evt["nick"]
      var pass = evt["pass"]
      var chan = evt["chan"]

      // Execute SQL query
      var sql = dbase.executeQuery("SELECT password,email FROM user_accounts WHERE email='" + nick + "'");

      var error = "";

      // If the user name exists, check the password
      if(sql != null){
         trace("USER FOUND!");
         var row = sql.get(0);
         var dbEmail = row.getItem("email");
         var dbPass = row.getItem("password");
         trace("STORED DB PASSWORD IS: " + dbPass);
         trace("USER PASSWORD IS: " + pass);
         if(dbPass == pass){
            trace("PASSWORDS MATCH!");
            error = "";
         }
         else{
            trace("PASSWORDS DO NOT MATCH!!!");
            error = "Incorrect Password";
         }
         
      }
      // If the user name does not exist
      else{
         trace("USER NOT FOUND!");
         error = "Invalid User";
      }

      // Now that the validation part is done, lets try to log the user in

      trace("BEFORE LOG IN, CHECKING FOR ERRORS ...");
      var res = new Object();
      if(error != ""){
         trace("THERE WAS AN ERROR, CANNOT LOG IN");
         res._cmd = "logKO";
      }
      else{
         trace("NO ERRORS FOUND, CONTINUING LOG IN PROCESS");
         var login = _server.loginUser(nick, pass, chan);
         if(login.success){
            trace("LOGIN SUCCESS!");
            error = "";
            res._cmd = "logOK";
         }
         else{
            trace("UH OH, LOGIN ERROR :(");
            error = login.error;
         }
         res.err = error;
      }

      // Send back the response of what happened
      _server.sendResponse(res,-1,null,chan);
   }
}


As I understand it, once I query the database, and a user is found, then Smartfox should fire this part:
trace("USER FOUND!");
But this should not be firing if I query the database, and the user is not found, right? I'm not sure whats going on.

How do you check if a record is null, other then
if(sql != null)
Because this doesn't seem to work. I believe that it is returning a record, but the record itself is null. How can I check all this? Any tips?

And yes, I have read the documentation, but nothing really covers what I am asking for. Any information will be much appreciated.
Fishypants
Posts: 57
Joined: 26 Oct 2010, 14:03
Location: South Pasadena California
Contact:

Postby Fishypants » 26 Dec 2010, 22:57

Ok so instead of checking if:

Code: Select all

if(sql != null)


It seems that if I use:

Code: Select all

if(sql.size() > 0)


It gives the correct results. Anyone know why this is? Why check for null, if checking for the size works better in this case? Still not 100% sure what the difference would be, but I am going to go with it for now.

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