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#app router fetch
quaint galleonBOT
Sorry @versed plover, I seem to be having a bit of trouble. Don't worry though, I've pinged my supprt and they will try to fix me up! :technologist:
Perhaps try again in 15mins?
versed plover
@quaint galleon trying again
quaint galleonBOT
Let me check the knowledge base for you. One moment! :books:
In Next.js, if an error occurs, you can attempt to recover from it without a full page reload. This can be done by using an error component that uses the reset() function to prompt the user to try again. When executed, the function will try to re-render the Error boundary's contents. If successful, the fallback error component is replaced with the result of the re-render.
Here's an example of how you can implement this:
'use client'
export default function Error({
error,
reset,
}: {
error: Error
reset: () => void
}) {
return (
<div>
<h2>Something went wrong!</h2>
<button onClick={() => reset()}>Try again</button>
</div>
)
}
In this example, when the "Try again" button is clicked, the reset() function is called, which attempts to re-render the Error boundary's contents.
For more information, you can refer to the Next.js documentation on error handling (https://nextjs.org/docs/app/building-your-application/routing/error-handling).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
versed plover
@quaint galleon
In my app router project I have
src/app/admin/page.tsx
const Admin = async ({ userId }: { userId: number }) => {
const response = await fetch('/app/api/test', { cache: 'no-store' })
const data = await response.json()
return (
<>
<h1>Admin</h1>
<span>
User ID:
{userId}
</span>
<form method="POST" action="/api/auth/logout">
<button type="submit">Logout</button>
</form>
</>
)
}
export default Admin
and I have
app/api/test.ts
import { createResponse } from '@lib/session'
const GET = async (): Promise<Response> => {
const response = new Response()
return createResponse(
response,
JSON.stringify({ message: 'User created' }),
).json()
}
export default GET
On my page.tsx file at line 2 const response = await fetch('/app/api/test', { cache: 'no-store' })
I get an error of Unhandled Runtime Error
Error: Failed to parse URL
Would you help me figure out how to resolve this error?
quaint galleonBOT
Let me check the knowledge base for you. One moment! :books:
The error message "Failed to parse URL" typically means that the URL you're trying to fetch is not correctly formatted. In your case, you're trying to fetch data from '/app/api/test'. This is a relative URL, and it might not be correctly resolved in the context of your Next.js application.
In Next.js, when making fetch requests in server-side code, you should use absolute URLs. This is because relative URLs are resolved in relation to the current page URL in the browser, but in server-side code, there is no current page URL.
Here's how you can modify your fetch request to use an absolute URL:
const Admin = async ({ userId }: { userId: number }) => {
const response = await fetch('<http://localhost:3000/app/api/test',> { cache: 'no-store' })
const data = await response.json()
// rest of your code
}
In this example, 'http://localhost:3000' is the base URL of your Next.js application during development. You should replace it with the actual base URL of your application in production.
Remember to handle errors when making fetch requests. You can do this by checking if the response is ok, and if not, throw an error:
const response = await fetch('<http://localhost:3000/app/api/test',> { cache: 'no-store' })
if (!response.ok) {
throw new Error('Failed to fetch data')
}
const data = await response.json()
For more information, you can refer to the Next.js documentation on data fetching (https://nextjs.org/docs/app/building-your-application/data-fetching/fetching).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
versed plover
@quaint galleon
I still get the error Unhandled Runtime Error Error: Unexpected token < in JSON at position 0 with
import { NextResponse } from 'next/server'
const GET = async (): Promise<Response> => NextResponse.json({ thisKey: 'thisValue' })
export default GET
and
const Admin = async ({ userId }: { userId: number }) => {
const response = await fetch('http:localhost:3000/app/api/test', { cache: 'no-store' })
const data = await response.json()
return (
<>
<h1>Admin</h1>
<span>
User ID:
{userId}
</span>
<form method="POST" action="/api/auth/logout">
<button type="submit">Logout</button>
</form>
</>
)
}
export default Admin
Let me check the knowledge base for you. One moment! :books:
The error message Unexpected token < in JSON at position 0 typically means that the server returned HTML when your code was expecting JSON. This can happen if the server returns an error page or if the URL is incorrect and leads to a 404 page.
In your case, it seems like there might be an issue with the URL you're using in your fetch request. You're using 'http:localhost:3000/app/api/test', but it seems like there's a typo. The correct format should be 'http://localhost:3000/app/api/test'.
Here's how you can modify your fetch request:
const Admin = async ({ userId }: { userId: number }) => {
const response = await fetch('<http://localhost:3000/app/api/test',> { cache: 'no-store' })
const data = await response.json()
// rest of your code
}
Also, ensure that your server-side function is correctly returning JSON. In your GET function, you're using NextResponse.json({ thisKey: 'thisValue' }). Make sure that this is correctly returning a JSON response.
If the error persists, you might want to add error handling to your fetch request to get more information about what's going wrong. You can do this by checking if the response is ok, and if not, throw an error:
const response = await fetch('<http://localhost:3000/app/api/test',> { cache: 'no-store' })
if (!response.ok) {
throw new Error('Failed to fetch data')
}
const data = await response.json()
This will throw an error if the server returns a status code that indicates an error, and the error message will include the status code, which can help you diagnose the issue.
For more information, you can refer to the Next.js documentation on data fetching (https://nextjs.org/docs/app/building-your-application/data-fetching/fetching).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
versed plover
@quaint galleon when i do postman GET api/test I get
<!DOCTYPE html><html><head><style data-next-hide-fouc="true">body{display:none
}</style><noscript data-next-hide-fouc="true"><style>body{display:block
}</style></noscript><meta charSet="utf-8"/><meta name="viewport" content="width=device-width"/><title>404: This page could not be found</title><meta name="next-head-count" content="3"/><noscript data-n-css=""></noscript><script defer="" nomodule="" src="/_next/static/chunks/polyfills.js?ts=1688211862349"></script><script src="/_next/static/chunks/webpack.js?ts=1688211862349" defer=""></script><script src="/_next/static/chunks/main.js?ts=1688211862349" defer=""></script><script src="/_next/static/chunks/pages/_app.js?ts=1688211862349" defer=""></script><script src="/_next/static/chunks/pages/_error.js?ts=1688211862349" defer=""></script><script src="/_next/static/development/_buildManifest.js?ts=1688211862349" defer=""></script><script src="/_next/static/development/_ssgManifest.js?ts=1688211862349" defer=""></script><noscript id="__next_css__DO_NOT_USE__"></noscript></head><body><div id="__next"><div style="font-family:system-ui,"Segoe UI",Roboto,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";height:100vh;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center"><div style="line-height:48px"><style>body{color:#000;background:#fff;margin: 0
}.next-error-h1{border-right: 1px solid rgba(0,
0,
0,.3)
}@media (prefers-color-scheme:dark){body{color:#fff;background:#000
}.next-error-h1{border-right: 1px solid rgba(255,
255,
255,.3)
}
}
>..
}</script></body></html>
When I would be expecting a next response json instead
quaint galleonBOT
Let me check the knowledge base for you. One moment! :books:
The response you're getting indicates that the server is returning a 404 error page, which means it can't find the route you're trying to access. This is why you're seeing HTML instead of the expected JSON response.
In your case, you're trying to access the route '/app/api/test'. However, based on the standard Next.js file-based routing, API routes should be inside the pages/api directory.
If your GET function is in a file at app/api/test.ts, it won't be accessible at '/app/api/test'. Instead, it should be in a file at pages/api/test.ts to be accessible at '/api/test'.
Here's how you can modify your file structure:
pages
└── api
└── test.ts
And your fetch request:
const Admin = async ({{ userId }}: {{ userId: number }}) => {{
const response = await fetch('<http://localhost:3000/api/test',> {{ cache: 'no-store' }})
const data = await response.json()
// rest of your code
}}
For more information, you can refer to the Next.js documentation on API routes (https://nextjs.org/docs/api-routes/introduction).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
versed plover
@quaint galleon i am wanting to use the app router so I want to have it at
src/app/api
I moved and renamed the src/app/test.ts file to src/app/test/route.ts
however now im getting a 405 method not allowed error in postman
quaint galleonBOT
Let me check the knowledge base for you. One moment! :books:
The 405 Method Not Allowed error typically means that the HTTP method you're using to make the request is not supported by the server for the specific URL you're trying to access.
In Next.js, Route Handlers are defined in a route.js|ts file inside the app directory and they support the following HTTP methods: GET, POST, PUT, PATCH, DELETE, HEAD, and OPTIONS. If an unsupported method is called, Next.js will return a 405 Method Not Allowed response.
In your case, you're trying to make a GET request to '/app/api/test'. If you're getting a 405 Method Not Allowed error, it means that the GET method is not defined in your route.ts file.
Here's how you can define the GET method in your route.ts file:
import { NextResponse } from 'next/server'
export async function GET() {
return NextResponse.json({ thisKey: 'thisValue' })
}
In this example, the GET function is exported from the route.ts file. This function will handle GET requests to '/app/api/test'.
If you're still getting a 405 Method Not Allowed error, it might be because you're trying to make a GET request to a URL that only supports other HTTP methods. Make sure that the URL you're trying to access and the HTTP method you're using match the Route Handlers you've defined in your route.ts file.
For more information, you can refer to the Next.js documentation on Route Handlers (https://nextjs.org/docs/app/building-your-application/routing/router-handlers).
Note: you can ask me a follow up question by @ mentioning me again :speech_balloon:
versed plover
@quaint galleon
I took the next starter app and all I changed was
src/app/page.tsx
import Home from '../components/page'
const Page = async () => {
const response = await fetch('http://localhost:3000/api/test', { cache: 'no-store' })
const data = await response.json()
return (
<Home message={data}/>
)
}
export default Page
src/app/api/test/route.ts
import { NextResponse } from 'next/server'
const GET = async (): Promise<Response> => NextResponse.json({ thisKey: 'thisValue' })
export default GET
src/components/page.tsx
import Image from 'next/image'
import styles from '../app/page.module.css'
const Home = ({ message }: { message: string }) => {
return (
<main className={styles.main}>
<div className={styles.description}>
<p>
{message}
</p>
<div>
<a
href="https://vercel.com?utm_source=create-next-app&utm_medium=appdir-template&utm_campaign=create-next-app"
target="_blank"
rel="noopener noreferrer"
>
By{' '}
<Image
src="/vercel.svg"
alt="Vercel Logo"
className={styles.vercelLogo}
width={100}
height={24}
priority
/>
</a>
</div>
</div>
<div className={styles.center}>
<Image
className={styles.logo}
src="/next.svg"
alt="Next.js Logo"
width={180}
height={37}
priority
/>
</div>
...
</main>
)
}
export default Home
Would you help me figure out the error Unhandled Runtime Error
Error: Unexpected end of JSON input
quaint galleonBOT
Let me check the knowledge base for you. One moment! :books: