サーバー側レンダリング

npm add aws-amplify @aws-amplify/adapter-nextjs

AMPLIFY_APP_ORIGIN=https://myapp.com

import { createServerRunner } from '@aws-amplify/adapter-nextjs';
import outputs from '@/amplify_outputs.json';

export const {
  runWithAmplifyServerContext,
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  createAuthRouteHandlers,
} = createServerRunner({
  config: outputs,
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  runtimeOptions: {
    cookies: {
      domain: '.myapp.com', // すべてのサブドメインでクッキーを利用可能にする
      sameSite: 'strict',
      maxAge: 60 * 60 * 24 * 7 // 7 日間
    }
  }
});

export const auth = defineAuth({
  loginWith: {
    email: true,
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    externalProviders: {
      callbackUrls: ["https://myapp.com/api/auth/sign-in-callback"],
      logoutUrls: ["https://myapp.com/api/auth/sign-out-callback"],
    },
  },
});

import { fetchAuthSession } from 'aws-amplify/auth/server';
import { NextRequest, NextResponse } from 'next/server';
import { runWithAmplifyServerContext } from '@/utils/amplifyServerUtils';

export async function middleware(request: NextRequest) {
  const response = NextResponse.next();

  const authenticated = await runWithAmplifyServerContext({
    nextServerContext: { request, response },
    operation: async (contextSpec) => {
      try {
        const session = await fetchAuthSession(contextSpec);
        return (
          session.tokens?.accessToken !== undefined &&
          session.tokens?.idToken !== undefined
        );
      } catch (error) {
        console.log(error);
        return false;
      }
    }
  });

  if (authenticated) {
    return response;
  }

  return NextResponse.redirect(new URL('/sign-in', request.url));
}

export const config = {
  matcher: [
    /*
     * 次で始まるもの以外のすべてのリクエストパスと一致させます:
     * - api (API ルート)
     * - _next/static (静的ファイル)
     * - _next/image (画像最適化ファイル)
     * - favicon.ico (ファビコンファイル)
     */
    '/((?!api|_next/static|_next/image|favicon.ico|sign-in).*)'
  ]
};

import { cookies } from 'next/headers';
import { getCurrentUser } from 'aws-amplify/auth/server';
import { runWithAmplifyServerContext } from '@/utils/amplifyServerUtils';

// このページは常にリクエストごとに動的にレンダリングされます
export const dynamic = 'force-dynamic';

export default async function AuthGetCurrentUserServer() {
  try {
    const currentUser = await runWithAmplifyServerContext({
      nextServerContext: { cookies },
      operation: (contextSpec) => getCurrentUser(contextSpec)
    });

    return (
      <p>{`Hello, ${currentUser.username}`}</p>
    );
  } catch (error) {
    console.error(error);
    return <p>Something went wrong...</p>;
  }
}

import { getUrl } from 'aws-amplify/storage/server';
import Image from 'next/image';
import { runWithAmplifyServerContext } from '@/utils/amplifyServerUtils';

// このページを 60 分ごとに再レンダリングします
export const revalidate = 60 * 60; // 秒単位

export default async function StaticallyRenderedPage() {
  try {
    const splashUrl = await runWithAmplifyServerContext({
      nextServerContext: null,
      operation: (contextSpec) =>
        getUrl(contextSpec, {
          key: 'splash.png'
        })
    });

    return (
      <Image
        src={splashUrl.url.toString()}
        alt="Splash Image"
        width={500}
        height={500}
      />
    );
  } catch (error) {
    console.error(error);
    return <p>Something went wrong...</p>;
  }
}

import { getCurrentUser } from 'aws-amplify/auth/server';
import { cookies } from 'next/headers';
import { NextResponse } from 'next/server';
import { runWithAmplifyServerContext } from '@/utils/amplifyServerUtils';

export async function GET() {
  const user = await runWithAmplifyServerContext({
    nextServerContext: { cookies },
    operation: (contextSpec) => getCurrentUser(contextSpec)
  });

  return NextResponse.json({ user });
}

export const getServerSideProps: GetServerSideProps = async ({ req, res }) => {
  const currentUser = await runWithAmplifyServerContext({
    nextServerContext: { request: req, response: res },
    operation: (contextSpec) => getCurrentUser(contextSpec)
  });

  return { props: { currentUser } };
};

export async function getStaticProps() {
  const splashUrl = await runWithAmplifyServerContext({
    nextServerContext: null,
    operation: (contextSpec) => getUrl(contextSpec, { key: 'splash.png' })
  });

  return {
    props: { imageUrl: splashUrl.url.toString() },
    revalidate: (splashUrl.expiresAt.getTime() - Date.now()) / 1000 // 秒単位
  };
}