feat(blob): Upgrade blob starter example to client uploads, progress,…

… next 15 (#976)

This commit upgrades the blob starter example
(https://blob-starter.vercel.app/):
- Use client uploads
- Display upload progress instead of just loading dots
- Multiple UX fixes like reset button, correct handling of image/* only,
allow
  to upload another image once done
- Upgrade all packages
- Cleanup package.json
- Refactor code for easier reading

**Before**


https://github.com/user-attachments/assets/ccfc6d4b-773c-41db-9966-d9866ffa9c89

**After**


https://github.com/user-attachments/assets/6c00f4f7-f270-41dc-b767-e453433eb76d

storage/blob-starter/.vscode/settings.json

@@ -1,4 +1,4 @@
 {
-  "typescript.tsdk": "node_modules/.pnpm/[email protected]/node_modules/typescript/lib",
-  "typescript.enablePromptUseWorkspaceTsdk": true
+  "typescript.enablePromptUseWorkspaceTsdk": true,
+  "typescript.tsdk": "node_modules/typescript/lib"
 }

storage/blob-starter/README.md

@@ -15,11 +15,11 @@ relatedTemplates:
 
 # Vercel Blob Next.js Starter
 
-Simple Next.js template that uses [Vercel Blob](https://vercel.com/blob)for image uploads
+Simple Next.js template that uses [Vercel Blob](https://vercel.com/blob) for image uploads
 
 ## Demo
 
-https://blob-starter.vercel.app/
+https://blob-starter.vercel.app
 
 ## How to Use
 

storage/blob-starter/app/api/upload/route.ts

@@ -1,21 +1,38 @@
-import { put } from '@vercel/blob'
+import { handleUpload, type HandleUploadBody } from '@vercel/blob/client'
 import { NextResponse } from 'next/server'
-import { customAlphabet } from 'nanoid'
 
-export const runtime = 'edge'
+export async function POST(request: Request): Promise<NextResponse> {
+  const body = (await request.json()) as HandleUploadBody
 
-const nanoid = customAlphabet(
-  '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz',
-  7
-) // 7-character random string
-export async function POST(req: Request) {
-  const file = req.body || ''
-  const contentType = req.headers.get('content-type') || 'text/plain'
-  const filename = `${nanoid()}.${contentType.split('/')[1]}`
-  const blob = await put(filename, file, {
-    contentType,
-    access: 'public',
-  })
+  try {
+    const jsonResponse = await handleUpload({
+      body,
+      request,
+      onBeforeGenerateToken: async () =>
+        // pathname
+        // clientPayload
+        {
+          // Generate a client token for the browser to upload the file
+          // ⚠️ Authenticate and authorize users before generating the token.
+          // Otherwise, you're allowing anonymous uploads.
+          return {
+            allowedContentTypes: ['image/*'],
+            maximumSizeInBytes: 50 * 1024 * 1024, // 50MB
+          }
+        },
+      onUploadCompleted: async ({ blob, tokenPayload }) => {
+        // Get notified of client upload completion
+        // ⚠️ This will not work during development (localhost),
+        // Unless you use ngrok or a similar service to expose and test your local server
+        console.log('blob upload completed', blob, tokenPayload)
+      },
+    })
 
-  return NextResponse.json(blob)
+    return NextResponse.json(jsonResponse)
+  } catch (error) {
+    return NextResponse.json(
+      { error: (error as Error).message },
+      { status: 400 } // The webhook will retry 5 times waiting for a 200
+    )
+  }
 }

storage/blob-starter/components/progress-bar.tsx

@@ -0,0 +1,12 @@
+export default function ProgressBar({ value }: { value: number }) {
+  return (
+    <div className="relative pt-1">
+      <div className="flex h-2 mb-4 overflow-hidden text-xs bg-blue-200 rounded">
+        <div
+          style={{ width: `${value}%` }}
+          className="flex flex-col justify-center text-center text-white bg-blue-500 shadow-none whitespace-nowrap transition-all duration-500 ease-in-out"
+        />
+      </div>
+    </div>
+  )
+}