How does one return data to the original caller function in Javascript?

Question

I have a problem returning data back to the function I want it returned to. Code below:

function ioServer(request_data, callback)
{
    $.ajax({
        cach         


        

Answer 1

I think maybe this is closer to what you are looking for...

function ioServer(request_data, callback)
{
    $.ajax({
        cache: false,
        data: "request=" + request_data,
        dataType: "json",
        error: function(XMLHttpRequest, textStatus, errorThrown){},
        success: function(response_data, textStatus){
                processResponse(response_data, callback);
                },
        timeout: 5000,
        type: "POST",
        url: "/portal/index.php/async"
    });
}   

function processRequest(command, item, properties, callback)
{
    var request = {};
    request.command = command;
    request.item = item;
    request.properties = properties;
    var toServer = JSON.stringify(request); 
    ioServer(toServer, callback);
}

//internal callback to handle response code
function processResponse(fromServer, callback)
{
    if (fromServer.response == 1)
    {
        //call the callback with the id
        callback(fromServer.id);   
    }   
    else
    {
        //You have to remember to call the callback no matter what
        //or the caller won't know when it's complete
        callback(null);  //or some other "didn't get a valid response" value
    } 
}