并行路由

同一个页面，放多个路由，，

目录前面加@,layout中可以当作插槽引入

import React from "react";

function layout({children,notifications,user}:{
    children:React.ReactNode,
    notifications:React.ReactNode,
    user:React.ReactNode
}){

    return (
        <div>layout
            {notifications}
            <div>{user}</div>
        </div>
    )
}

export default layout

nextjs拦截跳转页面

next写接口

创建route.ts,

export async function POST(request:Request){
    var comment = await request.json();

    const newComment = {
        id:comments.length+1,
        text:comment.text
    }

    comments.push(newComment)

    return new Response(JSON.stringify(newComment),{
        headers:{"Content-Type":"application/json"},
        status:201
    })
}

next接收queryParams

import {type NextRequest} from "next/server"
export async function GET(request:NextRequest,){
    var searchParams = request.nextUrl.searchParams;
    var query = searchParams.get("query");
    var find = query?comments.find(comment=>comment.text.includes(query)):comments;
    return Response.json(find)
}

获取请求头

• 第一种

import {type NextRequest} from "next/server"
export async function GET(request:NextRequest,){

     var requestHeaders = new Headers(request.headers);
     console.log(requestHeaders.get("Authorization"))
    }

• 第二种

import {type NextRequest} from "next/server"
import {headers} from "next/headers"
export async function GET(request:NextRequest,){
    const headersList =  await headers()
    console.log(headersList.get("Authorization"))

    return Response.json("xxx")
}

获取cookie

两种方式获取cookie

middleware中间件拦截

middleware.ts跟app一个层级

import  type {NextRequest} from "next/server";
import {NextResponse} from "next/server"

export function middleware(request:NextRequest){
    console.log(request.nextUrl.pathname,"pathname")

    // 重定向： 地址会变 
    // return NextResponse.redirect(new URL("/",request.url))
    //  转发，， 浏览器url不变，内容变化
    return NextResponse.rewrite(new URL("/",request.url))
}


export const config = {
    // 将 /hello 转发到  / 
    matcher:"/hello"
}

中间件处理response：===> 设置cookie或者响应头

import  type {NextRequest} from "next/server";
import {NextResponse} from "next/server"

export function middleware(request:NextRequest){
    console.log(request.nextUrl.pathname,"pathname")
    var response = NextResponse.next();
    var themePreference = request.cookies.get("theme");
    if (!themePreference){
        response.cookies.set("theme","dark")
    }
    
    return response
}


export const config = {
    // 将 /hello 转发到  /
    matcher:"/hello"
}