CODEWITHSUNDEEP
javapasswordsclient-server
Dembele
Dembele

Reputation: 1033

Java - request password again to client from server

I'm trying to create a more advanced server-to-client program but I've stumbled onto a problem. I managed to ask the client to enter password, and if false it rejects the client.

However, I tried adding a while condition to the server: If client enters wrong password then ask him/her to re-enter password. But I tried using a scanner but don't think that's the solution as I receive errors.

Server side:

 while(pw.equals("PASS")){
        toClient.writeBytes("This pw " + pw + " is correct. Access granted! " + "\n");
        }
        toClient.writeBytes("Your password... " + pw + " is wrong. Please retry.");
        pw = fromClient.readLine();
        toClient.writeBytes(pw+ "\n");
   }

Client side:

    System.out.print("Enter your password: ");
        myPass = fromUser.readLine();

        toServer.writeBytes(myPass + "\n");

        myPass = fromServer.readLine();
        System.out.println(myPass);

The code is quite long. But everything works. The connection is set up, port number are the same. Only problem is I can't get the client to keep re-entering password until correct.

Do I have to make a while loop for client too? I'm not too sure...

Upvotes: 0

Views: 364

Answers (2)

gashu
gashu

Reputation: 494

1st: Why is there a while loop on the server side?

2nd: The loop using a flag on the client side as suggested by @j0chn is correct way to do this.

Upvotes: 1

j0chn
j0chn

Reputation: 1113

I suggest a loop where you use a boolean to keep the loop alive.
Something like this: 

boolean isCorrect = false;
System.out.print("Enter your password: "); 
while(!isCorrect){
    myPass = fromUser.readLine();

    toServer.writeBytes(myPass + "\n");

    if(myPass == fromServer.readLine()){
        isCorrect = true;
    }
    myPass = fromServer.readLine();

    System.out.println(myPass);
}

Maybe you have to change this part:

if(myPass == fromServer.readLine()){

to:

if(myPass.equals(fromServer.readLine()){

But remember that there are a lot of possibilities.

I hope it helps you.

Upvotes: 0

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