☰

Direct Stream Caster

Dynamically detect and cast HLS streams via Chromecast on any site (e.g., StreamEast)

  1. // ==UserScript==
  2. // @name         Direct Stream Caster
  3. // @namespace    https://tampermonkey.net
  4. // @version      3.2
  5. // @description  Dynamically detect and cast HLS streams via Chromecast on any site (e.g., StreamEast)
  6. // @author       sharmanhall
  7. // @match        *://*/*
  8. // @grant        none
  9. // @run-at       document-start
  10. // @license      MIT
  11. // ==/UserScript==
  12.  
  13. (function () {
  14.     'use strict';
  15.  
  16.     let detectedStreamUrl = null;
  17.     const REFERER = "https://googlapisapi.com";
  18.  
  19.     // Hook fetch and XHR to sniff for .m3u8 playlist requests
  20.     const originalFetch = window.fetch;
  21.     window.fetch = async (...args) => {
  22.         if (args[0] && typeof args[0] === 'string' && args[0].includes('.m3u8')) {
  23.             console.log('[CastDetect] Found .m3u8 via fetch:', args[0]);
  24.             detectedStreamUrl = args[0];
  25.         }
  26.         return originalFetch(...args);
  27.     };
  28.  
  29.     const originalXHROpen = XMLHttpRequest.prototype.open;
  30.     XMLHttpRequest.prototype.open = function (method, url) {
  31.         if (url.includes('.m3u8')) {
  32.             console.log('[CastDetect] Found .m3u8 via XHR:', url);
  33.             detectedStreamUrl = url;
  34.         }
  35.         return originalXHROpen.apply(this, arguments);
  36.     };
  37.  
  38.     // Inject Cast SDK
  39.     const sdkScript = document.createElement('script');
  40.     sdkScript.src = 'https://www.gstatic.com/cv/js/sender/v1/cast_sender.js?loadCastFramework=1';
  41.     document.head.appendChild(sdkScript);
  42.  
  43.     // Wait for Cast API and then inject cast button
  44.     window.__onGCastApiAvailable = function (isAvailable) {
  45.         if (!isAvailable) return;
  46.  
  47.         cast.framework.CastContext.getInstance().setOptions({
  48.             receiverApplicationId: chrome.cast.media.DEFAULT_MEDIA_RECEIVER_APP_ID,
  49.             autoJoinPolicy: chrome.cast.AutoJoinPolicy.ORIGIN_SCOPED
  50.         });
  51.  
  52.         addCastButton();
  53.     };
  54.  
  55.     function addCastButton() {
  56.         if (document.getElementById('castToChromecast')) return;
  57.  
  58.         const btn = document.createElement('button');
  59.         btn.id = 'castToChromecast';
  60.         btn.textContent = '📺 Cast Stream';
  61.         Object.assign(btn.style, {
  62.             position: 'fixed',
  63.             bottom: '20px',
  64.             left: '20px',
  65.             zIndex: 9999,
  66.             padding: '12px 20px',
  67.             backgroundColor: '#1e88e5',
  68.             color: 'white',
  69.             border: 'none',
  70.             borderRadius: '6px',
  71.             fontSize: '16px',
  72.             cursor: 'pointer',
  73.             fontWeight: 'bold',
  74.             boxShadow: '0 0 10px rgba(0,0,0,0.5)'
  75.         });
  76.  
  77.         btn.onclick = () => {
  78.             const context = cast.framework.CastContext.getInstance();
  79.             const session = context.getCurrentSession();
  80.  
  81.             if (!session) {
  82.                 alert("No Chromecast session. Click the Cast icon in your Chrome toolbar first.");
  83.                 return;
  84.             }
  85.  
  86.             if (!detectedStreamUrl) {
  87.                 alert("No stream detected yet. Wait for the stream to load or refresh.");
  88.                 return;
  89.             }
  90.  
  91.             const mediaInfo = new chrome.cast.media.MediaInfo(detectedStreamUrl, 'application/x-mpegurl');
  92.             mediaInfo.customData = {
  93.                 headers: {
  94.                     Referer: REFERER
  95.                 }
  96.             };
  97.  
  98.             const request = new chrome.cast.media.LoadRequest(mediaInfo);
  99.             session.loadMedia(request).then(() => {
  100.                 console.log("Casting stream:", detectedStreamUrl);
  101.             }).catch(console.error);
  102.         };
  103.  
  104.         document.body.appendChild(btn);
  105.     }
  106. })();