Add workers assets example and update workers upload example

Author: markjmiller

examples/workers/script-upload.ts

@@ -1,86 +1,155 @@
 #!/usr/bin/env -S npm run tsn -T
 
-/*
- * Generate an API token: https://developers.cloudflare.com/fundamentals/api/get-started/create-token/
- * (Not Global API Key!)
+/**
+ * Create and deploy a Worker
+ * 
+ * Docs:
+ * - https://developers.cloudflare.com/workers/configuration/versions-and-deployments/
+ * - https://developers.cloudflare.com/workers/platform/infrastructure-as-code/
+ * 
+ * Prerequisites:
+ * 1. Generate an API token: https://developers.cloudflare.com/fundamentals/api/get-started/create-token/
+ * 2. Find your account ID: https://developers.cloudflare.com/fundamentals/setup/find-account-and-zone-ids/
+ * 3. Find your workers.dev subdomain: https://developers.cloudflare.com/workers/configuration/routing/workers-dev/
  *
- * Find your account id: https://developers.cloudflare.com/fundamentals/setup/find-account-and-zone-ids/
+ * Environment variables:
+ *   - CLOUDFLARE_API_TOKEN (required)
+ *   - CLOUDFLARE_ACCOUNT_ID (required)
+ *   - CLOUDFLARE_SUBDOMAIN (optional)
  *
- * Set these environment variables:
- * - CLOUDFLARE_API_TOKEN
- * - CLOUDFLARE_ACCOUNT_ID
- *
- * ### Workers for Platforms ###
- *
- * For uploading a User Worker to a dispatch namespace:
- * https://developers.cloudflare.com/cloudflare-for-platforms/workers-for-platforms/
- *
- * Define a "dispatchNamespaceName" variable and change the entire "const script = " line to the following:
- * "const script = await client.workersForPlatforms.dispatch.namespaces.scripts.update(dispatchNamespaceName, scriptName, {"
+ * Usage:
+ *   Run this script to deploy a simple "Hello World" Worker.
+ *   Access it at: my-hello-world-worker.$subdomain.workers.dev
  */
 
+import { exit } from 'node:process';
+
 import Cloudflare from 'cloudflare';
-import { toFile } from 'cloudflare/index';
 
-const apiToken = process.env['CLOUDFLARE_API_TOKEN'] ?? '';
-if (!apiToken) {
-  throw new Error('Please set envar CLOUDFLARE_ACCOUNT_ID');
+interface Config {
+  apiToken: string;
+  accountId: string;
+  subdomain: string | undefined;
+  workerName: string;
 }
 
-const accountID = process.env['CLOUDFLARE_ACCOUNT_ID'] ?? '';
-if (!accountID) {
-  throw new Error('Please set envar CLOUDFLARE_API_TOKEN');
+const WORKER_NAME = 'my-hello-world-worker';
+const SCRIPT_FILENAME = `${WORKER_NAME}.mjs`;
+
+function loadConfig(): Config {
+  const apiToken = process.env['CLOUDFLARE_API_TOKEN'];
+  if (!apiToken) {
+    throw new Error('Missing required environment variable: CLOUDFLARE_API_TOKEN');
+  }
+
+  const accountId = process.env['CLOUDFLARE_ACCOUNT_ID'];
+  if (!accountId) {
+    throw new Error('Missing required environment variable: CLOUDFLARE_ACCOUNT_ID');
+  }
+
+  const subdomain = process.env['CLOUDFLARE_SUBDOMAIN'];
+
+  return {
+    apiToken,
+    accountId,
+    subdomain: subdomain || undefined,
+    workerName: WORKER_NAME,
+  };
 }
 
+const config = loadConfig();
 const client = new Cloudflare({
-  apiToken: apiToken,
+  apiToken: config.apiToken,
 });
 
-async function main() {
-  const scriptName = 'my-hello-world-script';
-  const scriptFileName = `${scriptName}.mjs`;
+async function main(): Promise<void> {
+  try {
+    console.log('🚀 Starting Worker creation and deployment...');
 
-  // Workers Scripts prefer Module Syntax
-  // https://blog.cloudflare.com/workers-javascript-modules/
-  const scriptContent = `
-    export default {
-      async fetch(request, env, ctx) {
-        return new Response(env.MESSAGE, { status: 200 });
-      }
-    };
-  `;
+    const scriptContent = `
+      export default {
+        async fetch(request, env, ctx) {
+          return new Response(env.MESSAGE, { status: 200 });
+        },
+      }`.trim();
+    
+    let worker;
+    try {
+      worker = await client.workers.beta.workers.get(config.workerName, {
+        account_id: config.accountId,
+      });
+      console.log(`♻️  Worker ${config.workerName} already exists. Using it.`);
+    } catch (error) {
+      if (!(error instanceof Cloudflare.NotFoundError)) { throw error; }
+      console.log(`Worker ${config.workerName} does not exist. Creating it...`);
+      console.log(`✏️  Creating Worker ${config.workerName}...`);
+      worker = await client.workers.beta.workers.create({
+        account_id: config.accountId,
+        name: config.workerName,
+        subdomain: {
+          enabled: config.subdomain !== undefined,
+        },
+        observability: {
+          enabled: true,
+        },
+      });
+    }
 
-  try {
-    // https://developers.cloudflare.com/api/resources/workers/subresources/scripts/methods/update/
-    const script = await client.workers.scripts.update(scriptName, {
-      account_id: accountID,
-      // https://developers.cloudflare.com/workers/configuration/multipart-upload-metadata/
-      metadata: {
-        main_module: scriptFileName,
-        bindings: [
-          {
-            type: 'plain_text',
-            name: 'MESSAGE',
-            text: 'Hello World!',
+    console.log(`⚙️  Worker id: ${worker.id}`);
+    console.log('✏️  Creating Worker version...');
+    
+    // Create the first version of the Worker
+    const version = await client.workers.beta.workers.versions.create(worker.id, {
+      account_id: config.accountId,
+      main_module: SCRIPT_FILENAME,
+      compatibility_date: new Date().toISOString().split('T')[0]!,
+      bindings: [
+        {
+          type: 'plain_text',
+          name: 'MESSAGE',
+          text: 'Hello World!',
+        },
+      ],
+      modules: [
+        {
+          name: SCRIPT_FILENAME,
+          content_type: 'application/javascript+module',
+          content_base64: Buffer.from(scriptContent).toString('base64'),
+        },
+      ],
+    });
+
+    console.log(`⚙️  Version id: ${version.id}`);
+    console.log('🚚 Creating Worker deployment...');
+    
+    // Create a deployment and point all traffic to the version we created
+    await client.workers.scripts.deployments.create(config.workerName, {
+      account_id: config.accountId,
+      strategy: 'percentage',
+      versions: [
+        {
+            percentage: 100,
+            version_id: version.id,
           },
         ],
-      },
-      files: [
-        // Add main_module file
-        await toFile(Buffer.from(scriptContent), scriptFileName, {
-          type: 'application/javascript+module',
-        }),
-        // Can add other files, such as more modules or source maps
-        // await toFile(Buffer.from(sourceMapContent), sourceMapFileName, {
-        //   type: 'application/source-map',
-        // }),
-      ],
     });
-    console.log('Script Upload success!');
-    console.log(JSON.stringify(script, null, 2));
+    
+    console.log('✅ Deployment successful!');
+    
+    if (config.subdomain) {
+      console.log(`
+🌍 Your Worker is live!
+📍 URL: https://${config.workerName}.${config.subdomain}.workers.dev/
+`);
+    } else {
+      console.log(`
+⚠️  Set up a route, custom domain, or workers.dev subdomain to access your Worker.
+Add CLOUDFLARE_SUBDOMAIN to your environment variables to set one up automatically.
+`);
+    }
   } catch (error) {
-    console.error('Script Upload failure!');
-    console.error(error);
+    console.error('❌ Deployment failed:', error);
+    exit(1);
   }
 }