Unity WebGL Loader with ZIP, URL Rewrite, and Ads

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<!DOCTYPE html>
<html lang="en-us">
  <head>
      <base href = "https://cdn.jsdelivr.net/gh/faralong/all@main/sandboxcity/">
    <meta charset="utf-8">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
    
    <link rel="stylesheet" href="TemplateData/style.css">
	<link rel="manifest" href="manifest.json">
  </head>
  <body class="noselect">
    <div id="unity-container">
      <canvas id="unity-canvas"></canvas>
    </div>
    <div id="loading-cover" style="display:none;">
      <div id="unity-loading-bar">
        <div id="unity-logo"><img src="logo.png"></div>
        </br></br></br>
        <div id="unity-progress-bar-empty" style="display: none;">
          <div id="unity-progress-bar-full"></div>
        </div>
        <div class="spinner"></div>
      </div>
    </div>
    <script src = "jszip.js"></script>
     <script>

async function fetchAndCombineZip(binUrls) {
    const responses = await Promise.all(binUrls.map(url => fetch(url)));
    const buffers = await Promise.all(responses.map(res => res.arrayBuffer()));
    let totalLength = buffers.reduce((acc, buf) => acc + buf.byteLength, 0);
    let combined = new Uint8Array(totalLength);
    let offset = 0;
    for (let buf of buffers) {
        combined.set(new Uint8Array(buf), offset);
        offset += buf.byteLength;
    }
    return combined;
}

async function unzipWebpFromExternalBins(binUrls) {
    const blobUrls = {};
    const bytes = await fetchAndCombineZip(binUrls);
    const zip = await JSZip.loadAsync(bytes);
    for (const [filename, file] of Object.entries(zip.files)) {
        if (!file.dir) {
            let mime = '';
            if (filename.endsWith('.js') || filename.endsWith('.mjs')) {
                mime = 'text/javascript';
            } else if (filename.endsWith('.css')) {
                mime = 'text/css';
            } else if (filename.endsWith('.html')) {
                mime = 'text/html';
            } else if (filename.endsWith('.webp')) {
                mime = 'image/webp';
            } else if (filename.endsWith('.png')) {
                mime = 'image/png';
            } else if (filename.endsWith('.jpg') || filename.endsWith('.jpeg')) {
                mime = 'image/jpeg';
            }
            const rawBlob = await file.async("blob");
            const blob = mime ? new Blob([rawBlob], { type: mime }) : rawBlob;
            const blobUrl = URL.createObjectURL(blob);
            console.log("Extracted:", filename);
            blobUrls[filename] = blobUrl;
        }
    }
    return blobUrls;
}

let blobUrlss = "";
let binParts = [
  "parts-1.bin",
  "parts-2.bin"
];

unzipWebpFromExternalBins(binParts).then(blobUrls => {
    blobUrlss = blobUrls;
    const ORIGINAL_CREATE_ELEMENT = document.createElement;
    const ORIGINAL_SET_ATTRIBUTE = Element.prototype.setAttribute;

document.createElement = function(tagName) {
        const el = ORIGINAL_CREATE_ELEMENT.call(this, tagName);

if (tagName.toLowerCase() === 'script') {
            Object.defineProperty(el, 'src', {
                set(newSrc) {
                    const filename = extractFilename(newSrc);
                    const replacement = blobUrlss[filename];
                    if (replacement) {
                        
                        ORIGINAL_SET_ATTRIBUTE.call(el, 'src', replacement);
                    } else {
                        ORIGINAL_SET_ATTRIBUTE.call(el, 'src', newSrc);
                    }
                },
                get() {
                    return el.getAttribute('src');
                },
                configurable: true
            });
        }

return el;
    };

Element.prototype.setAttribute = function(name, value) {
        if (this.tagName === 'SCRIPT' && name === 'src') {
            const filename = extractFilename(value);
            const replacement = blobUrlss[filename];
            if (replacement) {
             
                return ORIGINAL_SET_ATTRIBUTE.call(this, name, replacement);
            }
        }

return ORIGINAL_SET_ATTRIBUTE.call(this, name, value);
    };

function extractFilename(url) {
        try {
            return new URL(url, location.href).pathname.split('/').pop();
        } catch {
            return url.split('/').pop(); 
        }
    }

const imageSrcDescriptor = Object.getOwnPropertyDescriptor(Image.prototype, 'src');
Object.defineProperty(Image.prototype, 'src', {
  set(value) {
    const newURL = rewriteURL(value);
    imageSrcDescriptor.set.call(this, newURL);
  },
  get: imageSrcDescriptor.get,
  configurable: true,
  enumerable: true,
});

const scriptSrcDescriptor = Object.getOwnPropertyDescriptor(HTMLScriptElement.prototype, 'src');
Object.defineProperty(HTMLScriptElement.prototype, 'src', {
  set(value) {
    const newURL = rewriteURL(value);
    scriptSrcDescriptor.set.call(this, newURL);
  },
  get: scriptSrcDescriptor.get,
  configurable: true,
  enumerable: true,
});

const linkHrefDescriptor = Object.getOwnPropertyDescriptor(HTMLLinkElement.prototype, 'href');
Object.defineProperty(HTMLLinkElement.prototype, 'href', {
  set(value) {
    const newURL = rewriteURL(value);
    linkHrefDescriptor.set.call(this, newURL);
  },
  get: linkHrefDescriptor.get,
  configurable: true,
  enumerable: true,
});

const mediaSrcDescriptor = Object.getOwnPropertyDescriptor(HTMLMediaElement.prototype, 'src');
Object.defineProperty(HTMLMediaElement.prototype, 'src', {
  set(value) {
    const newURL = rewriteURL(value);
    mediaSrcDescriptor.set.call(this, newURL);
  },
  get: mediaSrcDescriptor.get,
  configurable: true,
  enumerable: true,
});

// fetch
const originalFetch = window.fetch;
window.fetch = function(resource, init) {

if (typeof resource === "string") {
  //console.log(resource)
    resource = rewriteURL(resource);
  } else if (resource instanceof Request) {
    resource = new Request(rewriteURL(resource.url), resource);
  }
  return originalFetch.call(this, resource, init);
};

// XMLHttpRequest
const originalOpen = XMLHttpRequest.prototype.open;
XMLHttpRequest.prototype.open = function(method, url, ...rest) {
  const newURL = rewriteURL(url);
  return originalOpen.call(this, method, newURL, ...rest);
};

const OriginalAudio = window.Audio;
window.Audio = function(src) {
  const audio = new OriginalAudio();
  if (src) {
    audio.src = rewriteURL(src);
  }
  return audio;
};
window.Audio.prototype = OriginalAudio.prototype;

Unity WebGL Loader with ZIP, URL Rewrite, and Ads

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