I have a /app/api/route.ts, and i want to cache the response sent for a give peroid (say 30s), how can i do that?
#caching a nextjs route api
safe crater
hidden plankBOT
Hi @safe crater. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:
You can cache the response of your API route by setting the Cache-Control header in your response. This can be done using the response.setHeader method in your API route handler.
Here is an example of how you can do this:
export default function handler(request, response) {
response.setHeader('Cache-Control', 's-maxage=30');
response.status(200).json({ name: 'John Doe' });
}
In this example, the s-maxage=30 directive tells the server to cache the response for 30 seconds.
Please note that Cache-Control headers cannot be set using next.config.js or vercel.json files.
For more information, you can refer to the Next.js API Routes (https://nextjs.org/docs/api-routes/introduction) and Vercel's documentation on caching (https://vercel.com/docs/concepts/functions/edge-caching).
Sources:
- Next.js API Routes (https://nextjs.org/docs/api-routes/introduction)
- Vercel's documentation on caching (https://vercel.com/docs/concepts/functions/edge-caching)
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
safe crater
@hidden plank how do i do that? here is my code
note: i do not want to cache the fetch request, i want to cache the response.
import { NextRequest, NextResponse } from 'next/server';
export async function GET(req: NextRequest) {
let data = await fetch('https://jsonplaceholder.typicode.com/todos/1').then(res => res.json());
return NextResponse.json(data);
}
Let me check the knowledge base for you. One moment! :books:
You can cache the response of your API route by setting the Cache-Control header in your NextResponse. Here's how you can modify your code to do this:
import { NextRequest, NextResponse } from 'next/server';
export async function GET(req: NextRequest) {
let data = await fetch('<https://jsonplaceholder.typicode.com/todos/1'>).then(res => res.json());
return NextResponse.json(data).withHeader('Cache-Control', 's-maxage=30');
}
In this example, the s-maxage=30 directive tells the server to cache the response for 30 seconds.
Please note that Cache-Control headers cannot be set using next.config.js or vercel.json files.
For more information, you can refer to the Next.js API Routes (https://nextjs.org/docs/api-routes/introduction) and Vercel's documentation on caching (https://vercel.com/docs/concepts/functions/edge-caching).
Sources:
- Next.js API Routes (https://nextjs.org/docs/api-routes/introduction)
- Vercel's documentation on caching (https://vercel.com/docs/concepts/functions/edge-caching)
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
safe crater
@hidden plank keep in mind i'm using the app router, not pages router
Im getting a TS2339: Property 'withHeader' does not exist on type 'NextResponse '.
hidden plankBOT
Let me check the knowledge base for you. One moment! :books:
I apologize for the confusion. The withHeader method does not exist on the NextResponse object. Instead, you should create a new Response object and set the headers there. Here's how you can modify your code:
import { NextRequest, NextResponse } from 'next/server';
export async function GET(req: NextRequest) {
let data = await fetch('<https://jsonplaceholder.typicode.com/todos/1'>).then(res => res.json());
return new NextResponse(JSON.stringify(data), {
status: 200,
headers: {
'Content-Type': 'application/json',
'Cache-Control': 'public, s-maxage=30',
},
});
}
In this example, the s-maxage=30 directive tells the server to cache the response for 30 seconds.
Please note that Cache-Control headers cannot be set using next.config.js or vercel.json files.
For more information, you can refer to the Next.js Edge API Routes (https://nextjs.org/docs/api-routes/edge-api-routes) and Vercel's documentation on caching (https://vercel.com/docs/concepts/functions/edge-caching).
Sources:
- Next.js Edge API Routes (https://nextjs.org/docs/api-routes/edge-api-routes)
- Vercel's documentation on caching (https://vercel.com/docs/concepts/functions/edge-caching)
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
safe crater
@hidden plank How do i access query parameters?
as in /search?q=abc
i want to access the q query
hidden plankBOT
Let me check the knowledge base for you. One moment! :books:
You can access query parameters in Next.js using the NextRequest object in your API route handler. The NextRequest object has a url property, which is a string of the request URL. You can create a new URL object from this string and use its searchParams property to access the query parameters.
Here's an example of how you can do this:
import type { NextRequest } from 'next/server'
export default async function handler(req: NextRequest) {
const { searchParams } = new URL(req.url)
const q = searchParams.get('q')
// Do something with q
return new Response(q)
}
In this example, searchParams.get('q') will return the value of the q query parameter.
For more information, you can refer to the Next.js Edge API Routes (https://nextjs.org/docs/api-routes/edge-api-routes) documentation.
Sources:
- Next.js Edge API Routes (https://nextjs.org/docs/api-routes/edge-api-routes)