next的路由无法获取请求的body？

nextjs请求的为json object stream方式，这是一种流的方式传输，需要用await等待一下，或是then

import { NextRequest, NextResponse } from "next/server";
// export const dynamic = 'force-dynamic' // defaults to auto
export async function POST(request: NextRequest) {
  const body = await request.json();
  console.log(body);
    return new Response(JSON.stringify({ a:1, b:2 }), {
        headers: { 'Content-Type': 'text/plain' },
    })
}
export async function GET(request: Request) {

    console.log(request.headers.get('cookie'));
    return new Response(JSON.stringify({ c:3, d:4 }), {
        headers: { 'Content-Type': 'text/plain',"set-cookie":'token=1234567890;path=/;HttpOnly;SameSite=Lax' },
    })
}

如果直接用postman，nextjs是直接报500，这里需要稍微注意一下改成以下