solace,medusa js and strapi - fetch error

Question

i tried with copilot but still error

Error: Failed to fetch data

at fetchStrapiClient (rsc://React/Server/file:///home/ihsanu/projects/full_stack/Medusa/solace-medusa-starter/.next/server/chunks/ssr/%5Broot%20of%20the%20server%5D__d84c79..js?11:4802:15) at async getHeroBannerData (rsc://React/Server/file:///home/ihsanu/projects/full_stack/Medusa/solace-medusa-starter/.next/server/chunks/ssr/%5Broot%20of%20the%20server%5D__d84c79..js?12:4807:17) at async Home (rsc://React/Server/file:///home/ihsanu/projects/full_stack/Medusa/solace-medusa-starter/.next/server/chunks/ssr/fa5e3f..js?13:1263:101) at resolveErrorDev (http://localhost:8000/next/static/chunks/node_modules_next_dist_compiled_107ce8..js:3662:65) at processFullStringRow (http://localhost:8000/next/static/chunks/node_modules_next_dist_compiled_107ce8..js:3824:23) at processFullBinaryRow (http://localhost:8000/next/static/chunks/node_modules_next_dist_compiled_107ce8..js:3812:9) at progress (http://localhost:8000/next/static/chunks/node_modules_next_dist_compiled_107ce8..js:3932:102)

Answer 1

Answer:
This error usually means your Next.js app’s server-side code cannot successfully fetch data from your Strapi backend. Here are the common causes and how to fix them:

---

1. Check if Strapi Server is Running

Make sure your Strapi backend is running and accessible at the expected URL. Try opening the API URL in your browser or via curl to confirm it’s online.

curl http://localhost:1337/api/your-endpoint

---

2. Verify API URL in Environment Variables

Your Next.js app probably uses an environment variable for the Strapi API URL. Make sure:

• The variable is correctly named and loaded (process.env.STRAPI_API_URL)

• The URL includes protocol (http:// or https://)

• It points to the correct host and port accessible from your Next.js server

Example .env.local:

STRAPI_API_URL=http://localhost:1337

In your fetch client:

const apiUrl = process.env.STRAPI_API_URL || "http://localhost:1337";
const response = await fetch(`${apiUrl}/api/your-endpoint`);

---

3. CORS Configuration on Strapi

If your Next.js app runs on a different origin, your Strapi backend must allow cross-origin requests. Check your Strapi config/middleware.js or config/plugins.js for CORS settings:

module.exports = {
 settings: {
 cors: {
 enabled: true,
 origin: ["http://localhost:3000"] // your Next.js frontend origin
 }
 }
};

Restart Strapi after changes.

---

4. API Endpoint Protection and Authentication

If your endpoint requires authentication, you need to include appropriate tokens or credentials in the fetch request headers.

Example:

const response = await fetch(`${apiUrl}/api/your-endpoint`, {
 headers: {
 Authorization: `Bearer ${your_token_here}`,
 },
});

---

5. Server vs Client Fetching in Next.js

Since your error is happening during server-side rendering (SSR), the Next.js server must be able to access your Strapi API endpoint.

• If you use localhost in the URL, and Next.js runs inside a container or different environment, it may not resolve correctly.

• Use the actual IP address or network-accessible hostname if needed.

---

6. Debugging Tips

• Use console.log in your fetch function to print the full URL and response status.

• Catch errors explicitly:

try {
 const res = await fetch(apiUrl);
 if (!res.ok) {
 throw new Error(`HTTP error! status: ${res.status}`);
 }
 const data = await res.json();
 return data;
} catch (error) {
 console.error("Failed to fetch data:", error);
}

---

If you share your fetch code and environment setup, I can provide more precise help!

---

Summary:
Most often this error is due to incorrect API URL, Strapi server not running, or CORS blocking the request during SSR in Next.js. Double-check those first.