How can a web service written in c recover passed data (js) through a url?

Question

After passing the parameters through an AJAX call to my web service via the URL, how can I retrieve those parameters passed in my web service written in C?

This is my composition of the function to extrapolate the value of the single inputs. How do I call them in the web service?

function myFunction(element) {
  $.ajax({
    url: pacchetti_wsurl + 'ws_json_gestionepacchetti800',
    type: 'GET',
    data: {
      ws_login: readCookie("wc_login").replace(/\"/g, ""),
      ws_password_type: 'C',
      ws_pwd: encodeURI(readCookie("wc_password").replace(/\"/g, "")),
      nomepacchetto: $(".nomepacchetto").val(),
      id: element.value,
      tipotraffico: $(".tipotraffico").val(),
      numerominuti: $(".numerominuti").val(),
      importocanone: $(".importocanone").val(),
    },
    dataType: "json",
    encode: true,
  }).done(function(data) {});
  
  event.preventDefault();
};