Set up your Node.js server configuration for Web builds

Set up your package.json file

1. Create a file in a text editor or IDE.
2. Name the file

   package.json

   .
3. Save your file in your Node.js project directory.
4. Paste the following code into the file:

   {  "name": "node_server_example",  "version": "1.0.0",  "description": "An example for serving a Unity Web build with Node.js",  "main": "index.js",  "dependencies": {    "express": "^4.19.2"  }}

package.json

index.js

Set up your index.js file

1. Create a file in a text editor or IDE.
2. Name the file

   index.js

   .
3. Save your file in your Node.js project directory.
4. Paste the following code into the file:

   #!/usr/bin/env nodeconst path = require('path');const express = require('express');// Create express applicationconst app = express();// Settingsconst hostname = 'localhost';const port = 8080;const enableCORS = true; const enableWasmMultithreading = true;// Serve the current working directory const unityBuildPath = __dirname; // Note: this makes the current working directory visible to all computers over the network.app.use((req, res, next) => {    var path = req.url;    // Provide COOP, COEP and CORP headers for SharedArrayBuffer    // multithreading: https://web.dev/coop-coep/    if (enableWasmMultithreading &&        (            path == '/' ||            path.includes('.js') ||            path.includes('.html') ||            path.includes('.htm')        )    ) {        res.set('Cross-Origin-Opener-Policy', 'same-origin');        res.set('Cross-Origin-Embedder-Policy', 'require-corp');        res.set('Cross-Origin-Resource-Policy', 'cross-origin');    }    // Set CORS headers    if (enableCORS) {        res.set('Access-Control-Allow-Origin', '*');    }        // Set content encoding depending on compression    if (path.endsWith('.br')) {        res.set('Content-Encoding', 'br');    } else if (path.endsWith('.gz')) {        res.set('Content-Encoding', 'gzip');    }    // Explicitly set content type. Files can have wrong content type if build uses compression.    if (path.includes('.wasm')) {        res.set('Content-Type', 'application/wasm');    } else if (path.includes('.js')) {        res.set('Content-Type', 'application/javascript');    } else if (path.includes('.json')) {        res.set('Content-Type', 'application/json');    } else if (    path.includes('.data') ||    path.includes('.bundle') ||    path.endsWith('.unityweb')    ) {        res.set('Content-Type', 'application/octet-stream');    }    // Ignore cache-control: no-cache     // when if-modified-since or if-none-match is set    // because Unity Loader will cache and revalidate manually    if (req.headers['cache-control'] == 'no-cache' &&    (        req.headers['if-modified-since'] ||        req.headers['if-none-match']    )    ) {               delete req.headers['cache-control'];    }            next();});app.use('/', express.static(unityBuildPath, { immutable: true }));const server = app.listen(port, hostname, () => {    console.log(`Web server serving directory ${unityBuildPath} at http://${hostname}:${port}`);});server.addListener('error', (error) => {    console.error(error);});server.addListener('close', () => {    console.log('Server stopped.');    process.exit();});

5. If your build loads via CORS (for example, embedded on different website), then set the following line in your code to

   true

   , otherwise set it to

   false

   :

   const enableCORS = true; 

6. If you created your build with multithreading support, set the following line in your code to

   true

   , otherwise set it to

   false

   :

   const enableWasmMultithreading = true;

Additional resources

• Compressed builds and server configuration
• Server configuration code samples
• Set up your IIS server configuration for Web builds
• Set up your Apache server configuration for Web builds
• Set up your Nginx server configuration for Web builds