Node.js-Socket.IO发出多个回调

Question

I have some issues with my node.js application. Ill send a basic request with the socket.io-client to a masterserver. The masterserver checks the ID and if it's valid he outputs valid token. The problem is when I click on the client the second time the button it will stack the request on the masterserver and outputs the console.log x2.

Client:

function CheckAuthToken(authtoken, clid, callback){
   var token_state;
   console.log("Checking authtoken: " +authtoken);
   authsocket.emit('auth-token-check', {token: authtoken, clid: clid});
   authsocket.on('auth-token-check-callback', function(authresult){
      if(authresult.clid == clid){
        if(authresult.state ==  "token-valid"){
         token_state = "valid";
            callback(token_state);
      }else{
         token_state = "invalid";
            callback(token_state);
      }
    }
  });
}

AuthServer:

socket.on('auth-token-check', function(data){
    mysqlconnection.query('SELECT * FROM `player_token` WHERE `token` = ?', [data.token], function (error, results, fields) {
      if(results.length > 0){
        socket.emit('auth-token-check-callback', {state: 'token-valid',clid: data.clid});
      }else{
        socket.emit('auth-token-check-callback', {state: 'token-invalid',clid: data.clid});
      }
    });
});

What am I doing wrong?

Answer 1

Solution

Instead of adding all the time persistent Event Listener ( authsocket.on() ) use authsocket.once.

That fixes my problem.