fetch_from_tracker.sjs

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/* Any copyright is dedicated to the Public Domain.

 * http://creativecommons.org/publicdomain/zero/1.0/ */

"use strict";

function handleRequest(request, response) {

  let params = new URLSearchParams(request.queryString);

  response.setHeader("Content-Type", "text/javascript; charset=UTF-8", false);

  let rand = params.get("rand");

  let fetchScript = `

    results.fetch = "PENDING";

    fetch("http://localhost:21555/?type=fetch&rand=${rand}")

      .then(_res => {

        results.fetch = "OK";

})

      .catch(_err => {

        results.fetch = "FAIL";

});

`;

  let xhrScript = `

    results.xhr = "PENDING";

    const xhr = new XMLHttpRequest();

    xhr.open("GET", "http://localhost:21555/?type=xhr&rand=${rand}");

    xhr.onload = () => results.xhr = xhr.status === 200 ? "OK" : "FAIL";

    xhr.onerror = () => results.xhr = "FAIL";

    xhr.send();

`;

  let imgScript = `

    results.img = "PENDING";

    const img = document.createElement('img');

    img.src = 'http://localhost:21555/?type=img&rand=${rand}';

    img.alt = 'Injected Image';

    img.onload = () => results.img = "OK";

    img.onerror = () => results.img = "FAIL";

    document.body.appendChild(img);

`;

  let cssScript = `

    results.css = "PENDING";

    const link = document.createElement('link');

    link.rel = 'stylesheet';

    link.href = 'http://localhost:21555/?type=css&rand=${rand}';

    link.onload = () => results.css = "OK";

    link.onerror = () => results.css = "FAIL";

    document.head.appendChild(link);

`;

  let videoScript = `

    results.video = "PENDING";

    const video = document.createElement('video');

    video.src = 'http://localhost:21555/?type=video&rand=${rand}';

    video.onloadeddata = () => results.video = "OK";

    video.onerror = () => results.video = "FAIL";

    document.body.appendChild(video);

`;

  let audioScript = `

    results.audio = "PENDING";

    const audio = document.createElement('audio');

    audio.src = 'http://localhost:21555/?type=audio&rand=${rand}';

    audio.onloadeddata = () => results.audio = "OK";

    audio.onerror = () => results.audio = "FAIL";

    document.body.appendChild(audio);

`;

  let iframeScript = `

    results.iframe = "PENDING";

    const iframe = document.createElement('iframe');

    iframe.src = 'http://localhost:21555/?type=iframe&rand=${rand}';

    iframe.onload = () => results.iframe = "OK";

    iframe.onerror = () => results.iframe = "FAIL";

    document.body.appendChild(iframe);

`;

  let scriptScript = `

    results.script = "PENDING";

    const script = document.createElement('script');

    script.src = 'http://localhost:21555/?type=script&rand=${rand}';

    script.onload = () => results.script = "OK";

    script.onerror = () => results.script = "FAIL";

    document.head.appendChild(script);

`;

  let fontScript = `

    results.font = "PENDING";

    const font = new FontFace('TestFont', 'url(http://localhost:21555/?type=font&rand=${rand})');

    font.load().then(() => {

      document.fonts.add(font);

      results.font = "OK";

    }).catch(() => {

      results.font = "FAIL";

});

`;

  let websocketScript = `

    results.websocket = "PENDING";

    try {

      const ws = new WebSocket("ws://localhost:21555/?type=websocket&rand=${rand}");

      ws.onopen = () => results.websocket = "OK";

      ws.onerror = () => results.websocket = "FAIL";

    } catch (e) {

      results.websocket = "FAIL";

`;

  switch (params.get("test")) {

    case "fetch":

      response.write(fetchScript);

      return;

    case "xhr":

      response.write(xhrScript);

      return;

    case "img":

      response.write(imgScript);

      return;

    case "css":

      response.write(cssScript);

      return;

    case "video":

      response.write(videoScript);

      return;

    case "audio":

      response.write(audioScript);

      return;

    case "iframe":

      response.write(iframeScript);

      return;

    case "script":

      response.write(scriptScript);

      return;

    case "font":

      response.write(fontScript);

      return;

    case "websocket":

      response.write(websocketScript);

      return;

  response.write(`console.log("unknown test type")`);