proxy.js

import { NextResponse, NextRequest } from 'next/server'
 
// 如果在内部使用 `await`，此函数可以标记为 `async`
export function proxy(request: NextRequest) {
  return NextResponse.redirect(new URL('/home', request.url))
}
 
export const config = {
  matcher: '/about/:path*',
}

// 默认导出示例
export default function proxy(request) {
  // Proxy 逻辑
}

export const config = {
  matcher: ['/about/:path*', '/dashboard/:path*'],
}

export const config = {
  matcher: [
    {
      source: '/api/*',
      regexp: '^/api/(.*)',
      locale: false,
      has: [
        { type: 'header', key: 'Authorization', value: 'Bearer Token' },
        { type: 'query', key: 'userId', value: '123' },
      ],
      missing: [{ type: 'cookie', key: 'session', value: 'active' }],
    },
  ],
}

import type { NextRequest } from 'next/server'
 
export function proxy(request: NextRequest) {
  // Proxy 逻辑在这里
}

module.exports = {
  skipTrailingSlashRedirect: true,
}

const legacyPrefixes = ['/docs', '/blog']
 
export default async function proxy(req) {
  const { pathname } = req.nextUrl
 
  if (legacyPrefixes.some((prefix) => pathname.startsWith(prefix))) {
    return NextResponse.next()
  }
 
  // 应用尾部斜杠处理
  if (
    !pathname.endsWith('/') &&
    !pathname.match(/((?!\.well-known(?:\/.*)?)(?:[^/]+\/)*[^/]+\.\w+)/)
  ) {
    return NextResponse.redirect(
      new URL(`${req.nextUrl.pathname}/`, req.nextUrl)
    )
  }
}

module.exports = {
  skipMiddlewareUrlNormalize: true,
}

export default async function proxy(req) {
  const { pathname } = req.nextUrl
 
  // GET /_next/data/build-id/hello.json
 
  console.log(pathname)
  // 使用此标志，现在是 /_next/data/build-id/hello.json
  // 没有此标志，将被标准化为 /hello
}

import { NextResponse } from 'next/server'
import type { NextRequest } from 'next/server'
 
export function proxy(request: NextRequest) {
  if (request.nextUrl.pathname.startsWith('/about')) {
    return NextResponse.rewrite(new URL('/about-2', request.url))
  }
 
  if (request.nextUrl.pathname.startsWith('/dashboard')) {
    return NextResponse.rewrite(new URL('/dashboard/user', request.url))
  }
}

import { NextResponse } from 'next/server'
import type { NextRequest } from 'next/server'
 
export function proxy(request: NextRequest) {
  // 假设传入请求中存在 "Cookie:nextjs=fast" header
  // 使用 `RequestCookies` API 从请求中获取 cookies
  let cookie = request.cookies.get('nextjs')
  console.log(cookie) // => { name: 'nextjs', value: 'fast', Path: '/' }
  const allCookies = request.cookies.getAll()
  console.log(allCookies) // => [{ name: 'nextjs', value: 'fast' }]
 
  request.cookies.has('nextjs') // => true
  request.cookies.delete('nextjs')
  request.cookies.has('nextjs') // => false
 
  // 使用 `ResponseCookies` API 在响应上设置 cookies
  const response = NextResponse.next()
  response.cookies.set('vercel', 'fast')
  response.cookies.set({
    name: 'vercel',
    value: 'fast',
    path: '/',
  })
  cookie = response.cookies.get('vercel')
  console.log(cookie) // => { name: 'vercel', value: 'fast', Path: '/' }
  // 传出响应将具有 `Set-Cookie:vercel=fast;path=/` header。
 
  return response
}

import { NextResponse } from 'next/server'
import type { NextRequest } from 'next/server'
 
export function proxy(request: NextRequest) {
  // 克隆请求头并设置新的 header `x-hello-from-proxy1`
  const requestHeaders = new Headers(request.headers)
  requestHeaders.set('x-hello-from-proxy1', 'hello')
 
  // 你也可以在 NextResponse.next 中设置请求头
  const response = NextResponse.next({
    request: {
      // 新的请求头
      headers: requestHeaders,
    },
  })
 
  // 设置新的响应头 `x-hello-from-proxy2`
  response.headers.set('x-hello-from-proxy2', 'hello')
  return response
}

import { NextRequest, NextResponse } from 'next/server'
 
const allowedOrigins = ['https://acme.com', 'https://my-app.org']
 
const corsOptions = {
  'Access-Control-Allow-Methods': 'GET, POST, PUT, DELETE, OPTIONS',
  'Access-Control-Allow-Headers': 'Content-Type, Authorization',
}
 
export function proxy(request: NextRequest) {
  // 从请求中检查 origin
  const origin = request.headers.get('origin') ?? ''
  const isAllowedOrigin = allowedOrigins.includes(origin)
 
  // 处理预检请求
  const isPreflight = request.method === 'OPTIONS'
 
  if (isPreflight) {
    const preflightHeaders = {
      ...(isAllowedOrigin && { 'Access-Control-Allow-Origin': origin }),
      ...corsOptions,
    }
    return NextResponse.json({}, { headers: preflightHeaders })
  }
 
  // 处理简单请求
  const response = NextResponse.next()
 
  if (isAllowedOrigin) {
    response.headers.set('Access-Control-Allow-Origin', origin)
  }
 
  Object.entries(corsOptions).forEach(([key, value]) => {
    response.headers.set(key, value)
  })
 
  return response
}
 
export const config = {
  matcher: '/api/:path*',
}

import type { NextRequest } from 'next/server'
import { isAuthenticated } from '@lib/auth'
 
// 将 proxy 限制在以 `/api/` 开头的路径
export const config = {
  matcher: '/api/:function*',
}
 
export function proxy(request: NextRequest) {
  // 调用我们的身份验证函数来检查请求
  if (!isAuthenticated(request)) {
    // 使用 JSON 响应表示错误消息
    return Response.json(
      { success: false, message: 'authentication failed' },
      { status: 401 }
    )
  }
}

export const config = {
  matcher: [
    /*
     * 匹配所有请求路径，除了以以下内容开头的路径：
     * - api（API routes）
     * - _next/static（静态文件）
     * - _next/image（图像优化文件）
     * - favicon.ico、sitemap.xml、robots.txt（元数据文件）
     */
    '/((?!api|_next/static|_next/image|favicon.ico|sitemap.xml|robots.txt).*)',
  ],
}

export const config = {
  matcher: [
    /*
     * 匹配所有请求路径，除了以以下内容开头的路径：
     * - api（API routes）
     * - _next/static（静态文件）
     * - _next/image（图像优化文件）
     * - favicon.ico、sitemap.xml、robots.txt（元数据文件）
     */
    {
      source:
        '/((?!api|_next/static|_next/image|favicon.ico|sitemap.xml|robots.txt).*)',
      missing: [
        { type: 'header', key: 'next-router-prefetch' },
        { type: 'header', key: 'purpose', value: 'prefetch' },
      ],
    },
 
    {
      source:
        '/((?!api|_next/static|_next/image|favicon.ico|sitemap.xml|robots.txt).*)',
      has: [
        { type: 'header', key: 'next-router-prefetch' },
        { type: 'header', key: 'purpose', value: 'prefetch' },
      ],
    },
 
    {
      source:
        '/((?!api|_next/static|_next/image|favicon.ico|sitemap.xml|robots.txt).*)',
      has: [{ type: 'header', key: 'x-present' }],
      missing: [{ type: 'header', key: 'x-missing', value: 'prefetch' }],
    },
  ],
}

import { NextResponse } from 'next/server'
import type { NextFetchEvent, NextRequest } from 'next/server'
 
export function proxy(req: NextRequest, event: NextFetchEvent) {
  event.waitUntil(
    fetch('https://my-analytics-platform.com', {
      method: 'POST',
      body: JSON.stringify({ pathname: req.nextUrl.pathname }),
    })
  )
 
  return NextResponse.next()
}

import { unstable_doesProxyMatch } from 'next/experimental/testing/server'
 
expect(
  unstable_doesProxyMatch({
    config,
    nextConfig,
    url: '/test',
  })
).toEqual(false)

import { isRewrite, getRewrittenUrl } from 'next/experimental/testing/server'
 
const request = new NextRequest('https://nextjs.org/docs')
const response = await proxy(request)
expect(isRewrite(response)).toEqual(true)
expect(getRewrittenUrl(response)).toEqual('https://other-domain.com/docs')
// 如果响应是重定向，也可以使用 getRedirectUrl

npx @next/codemod@canary middleware-to-proxy .

// middleware.ts -> proxy.ts
 
- export function middleware() {
+ export function proxy() {