implement image upload and SVG conversion using Cloudinary and ImageTracer

Author: Shitanshukumar607

app/api/upload/route.ts

@@ -0,0 +1,60 @@
+import { v2 as cloudinary, UploadApiResponse } from "cloudinary";
+// @ts-ignore
+import ImageTracer from "imagetracerjs";
+import { NextResponse } from "next/server";
+import fetch from "node-fetch";
+import { PNG } from "pngjs";
+
+cloudinary.config({
+  cloud_name: process.env.CLOUDINARY_CLOUD_NAME!,
+  api_key: process.env.CLOUDINARY_API_KEY!,
+  api_secret: process.env.CLOUDINARY_API_SECRET!,
+});
+
+async function cloudinaryToSVG(imageUrl: string, options = { scale: 5 }) {
+  const response = await fetch(imageUrl);
+  if (!response.ok)
+    throw new Error(`Failed to fetch image: ${response.statusText}`);
+  const buffer = Buffer.from(await response.arrayBuffer());
+
+  const png = PNG.sync.read(buffer);
+
+  const myImageData = {
+    width: png.width,
+    height: png.height,
+    data: png.data,
+  };
+
+  const svgstring = ImageTracer.imagedataToSVG(myImageData, options);
+  return svgstring;
+}
+
+export async function POST(req: Request) {
+  const formData = await req.formData();
+  const file = formData.get("image") as File;
+
+  if (!file) {
+    return NextResponse.json({ error: "No file uploaded" }, { status: 400 });
+  }
+
+  // Read file as buffer
+  const bytes = await file.arrayBuffer();
+  const buffer = Buffer.from(bytes);
+
+  const cloudinaryResponse: UploadApiResponse = await new Promise(
+    (resolve, reject) => {
+      const uploadStream = cloudinary.uploader.upload_stream((err, result) => {
+        if (err || !result) return reject(err);
+        resolve(result);
+      });
+      uploadStream.end(buffer);
+    }
+  );
+
+  const svgString = await cloudinaryToSVG(cloudinaryResponse.secure_url);
+
+  return NextResponse.json(
+    { url: cloudinaryResponse.secure_url, svg: svgString },
+    { status: 201 }
+  );
+}

app/api/users/route.ts

@@ -0,0 +1,25 @@
+export async function GET(request: Request) {
+  // For example, fetch data from your DB here
+  const users = [
+    { id: 1, name: "Alice" },
+    { id: 2, name: "Bob" },
+  ];
+  return new Response(JSON.stringify(users), {
+    status: 200,
+    headers: { "Content-Type": "application/json" },
+  });
+}
+
+export async function POST(request: Request) {
+  // Parse the request body
+  const body = await request.json();
+  const { name } = body;
+
+  // e.g. Insert new user into your DB
+  const newUser = { id: Date.now(), name };
+
+  return new Response(JSON.stringify(newUser), {
+    status: 201,
+    headers: { "Content-Type": "application/json" },
+  });
+}

app/page.tsx

@@ -1,103 +1,38 @@
-import Image from "next/image";
+"use client";
 
-export default function Home() {
-  return (
-    <div className="font-sans grid grid-rows-[20px_1fr_20px] items-center justify-items-center min-h-screen p-8 pb-20 gap-16 sm:p-20">
-      <main className="flex flex-col gap-[32px] row-start-2 items-center sm:items-start">
-        <Image
-          className="dark:invert"
-          src="/next.svg"
-          alt="Next.js logo"
-          width={180}
-          height={38}
-          priority
-        />
-        <ol className="font-mono list-inside list-decimal text-sm/6 text-center sm:text-left">
-          <li className="mb-2 tracking-[-.01em]">
-            Get started by editing{" "}
-            <code className="bg-black/[.05] dark:bg-white/[.06] font-mono font-semibold px-1 py-0.5 rounded">
-              app/page.tsx
-            </code>
-            .
-          </li>
-          <li className="tracking-[-.01em]">
-            Save and see your changes instantly.
-          </li>
-        </ol>
+import { useState } from "react";
+
+export default function UploadPage() {
+  const [file, setFile] = useState<File | null>(null);
+  const [data, setData] = useState<String | null>(null);
+
+  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    if (e.target.files) {
+      setFile(e.target.files[0]);
+    }
+  };
+
+  const handleUpload = async () => {
+    if (!file) return;
 
-        <div className="flex gap-4 items-center flex-col sm:flex-row">
-          <a
-            className="rounded-full border border-solid border-transparent transition-colors flex items-center justify-center bg-foreground text-background gap-2 hover:bg-[#383838] dark:hover:bg-[#ccc] font-medium text-sm sm:text-base h-10 sm:h-12 px-4 sm:px-5 sm:w-auto"
-            href="https://vercel.com/new?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-            target="_blank"
-            rel="noopener noreferrer"
-          >
-            <Image
-              className="dark:invert"
-              src="/vercel.svg"
-              alt="Vercel logomark"
-              width={20}
-              height={20}
-            />
-            Deploy now
-          </a>
-          <a
-            className="rounded-full border border-solid border-black/[.08] dark:border-white/[.145] transition-colors flex items-center justify-center hover:bg-[#f2f2f2] dark:hover:bg-[#1a1a1a] hover:border-transparent font-medium text-sm sm:text-base h-10 sm:h-12 px-4 sm:px-5 w-full sm:w-auto md:w-[158px]"
-            href="https://nextjs.org/docs?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-            target="_blank"
-            rel="noopener noreferrer"
-          >
-            Read our docs
-          </a>
-        </div>
-      </main>
-      <footer className="row-start-3 flex gap-[24px] flex-wrap items-center justify-center">
-        <a
-          className="flex items-center gap-2 hover:underline hover:underline-offset-4"
-          href="https://nextjs.org/learn?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          <Image
-            aria-hidden
-            src="/file.svg"
-            alt="File icon"
-            width={16}
-            height={16}
-          />
-          Learn
-        </a>
-        <a
-          className="flex items-center gap-2 hover:underline hover:underline-offset-4"
-          href="https://vercel.com/templates?framework=next.js&utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          <Image
-            aria-hidden
-            src="/window.svg"
-            alt="Window icon"
-            width={16}
-            height={16}
-          />
-          Examples
-        </a>
-        <a
-          className="flex items-center gap-2 hover:underline hover:underline-offset-4"
-          href="https://nextjs.org?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
-          target="_blank"
-          rel="noopener noreferrer"
-        >
-          <Image
-            aria-hidden
-            src="/globe.svg"
-            alt="Globe icon"
-            width={16}
-            height={16}
-          />
-          Go to nextjs.org →
-        </a>
-      </footer>
+    const formData = new FormData();
+    formData.append("image", file);
+
+    const res = await fetch("/api/upload", {
+      method: "POST",
+      body: formData,
+    });
+
+    const data = await res.json();
+    setData(data.url + "\n\n" + data.svg);
+    console.log("Response:", data);
+  };
+
+  return (
+    <div>
+      <input type="file" accept="image/*" onChange={handleFileChange} />
+      <button onClick={handleUpload}>Upload</button>
+      <p>{data}</p>
     </div>
   );
 }