mirror of
https://github.com/nuxt/nuxt.git
synced 2024-11-16 19:04:48 +00:00
108 lines
2.7 KiB
Markdown
108 lines
2.7 KiB
Markdown
---
|
||
icon: IconDirectory
|
||
title: server
|
||
head.title: Server directory
|
||
---
|
||
|
||
# Server directory
|
||
|
||
Nuxt uses the `server/` directory to create any backend logic for your application. It supports HMR and powerful features.
|
||
|
||
The `server/` directory contains API endpoints and server middleware for your project.
|
||
|
||
## API Routes
|
||
|
||
Nuxt will automatically read in any files in the `~/server/api` directory to create API endpoints.
|
||
|
||
Each file should export a default function that handles API requests. It can return a promise or JSON data directly (or use `res.end()`).
|
||
|
||
### Examples
|
||
|
||
#### Hello world
|
||
|
||
```js [server/api/hello.ts]
|
||
export default (req, res) => 'Hello World'
|
||
```
|
||
|
||
See the result on <http://localhost:3000/api/hello>.
|
||
|
||
#### Async function
|
||
|
||
```js [server/api/async.ts]
|
||
export default async (req, res) => {
|
||
await someAsyncFunction()
|
||
|
||
return {
|
||
someData: true
|
||
}
|
||
}
|
||
```
|
||
|
||
**Example:** Using Node.js style
|
||
|
||
```ts [server/api/node.ts]
|
||
import type { IncomingMessage, ServerResponse } from 'http'
|
||
|
||
export default async (req: IncomingMessage, res: ServerResponse) => {
|
||
res.statusCode = 200
|
||
res.end('Works!')
|
||
}
|
||
```
|
||
|
||
#### Accessing req data
|
||
|
||
```js
|
||
import { useBody, useCookies, useQuery } from 'h3'
|
||
|
||
export default async (req, res) => {
|
||
const query = useQuery(req)
|
||
const body = await useBody(req) // only for POST | PUT | PATCH | DELETE requests
|
||
const cookies = useCookies(req)
|
||
|
||
return { query, body, cookies }
|
||
}
|
||
```
|
||
|
||
Learn more about [h3 methods](https://www.jsdocs.io/package/h3#package-index-functions).
|
||
|
||
## Server Middleware
|
||
|
||
Nuxt will automatically read in any files in the `~/server/middleware` to create server middleware for your project.
|
||
|
||
These files will be run on every request, unlike [API routes](#api-routes) that are mapped to their own routes. This is typically so you can add a common header to all responses, log responses or modify the incoming request object for later use in the request chain.
|
||
|
||
Each file should export a default function that will handle a request.
|
||
|
||
```js
|
||
export default async (req, res) => {
|
||
req.someValue = true
|
||
}
|
||
```
|
||
|
||
There is nothing different about the `req`/`res` objects, so typing them is straightforward.
|
||
|
||
```ts
|
||
import type { IncomingMessage, ServerResponse } from 'http'
|
||
|
||
export default async (req: IncomingMessage, res: ServerResponse) => {
|
||
req.someValue = true
|
||
}
|
||
```
|
||
|
||
To pass the request deeper into the application, you can `return` inside the function:
|
||
|
||
```js
|
||
export default async (req, res) => {
|
||
const isNotHandledByThisMiddleware = req.url.includes('/some-unhandled-url-path/')
|
||
if(isNotHandledByThisMiddleware) {
|
||
return
|
||
}
|
||
|
||
// Actual logic here
|
||
}
|
||
```
|
||
|
||
::alert{type=info icon=🔎}
|
||
Find more information about custom middleware in the documentation for [nuxt.config.js](/docs/directory-structure/nuxt.config#servermiddleware)
|
||
::
|