[AWS x SEO対応] S3 & CloudFrontで静的ホスティングしたウェブサイトのドメイン移管 ~ 301リダイレクトを仕込む

            
            301 Moved Permanently:
    リクエストされたリソースのURLが永遠に変更されたことを示します。
    レスポンスで新しいURLが与えられます。
302 Found:
    リクエスト元のURLが一時的に変更されたことを示します。
    リクエスト元のURLは今後さらに変更される可能性もあるので、
    クライアントは引き続き同じURLを使用するべき、と解釈されます。
        

            
            const convertMap = {
    '/fuga/index.html': 'https://hoge-s3-blog.jp/fuga/index.html',
    //👇リダイレクトしたいURLを連想配列として追加...
    '/mofu/index.html': 'https://hoge-s3-blog.jp/mofu/index.html',
    //...
};

exports.handler = async (event, context, callback) => {
    const request = event.Records[0].cf.request;
    const uri = request.uri;
    const uriMod = uri.replace(/\/$/, '\/index.html').replace(/\/([^\.\/]+)$/, '/$1/index.html');
    const val = convertMap[uriMod];

    if(val !== undefined) {
        console.log('+++ Redirect To +++');
        console.log(val);
        const redirectRes = {
            status: '301',
            statusDescription: 'Moved Permanently',
            headers: {
                location: [{
                    key: 'Location',
                    value: val,
                }],
            },
        };
        return callback(null, redirectRes);
    } else {
        console.log('+++ Direct To +++');
        console.log(uriMod);
        request.uri = uriMod;
        return callback(null, request);
    }
};
        

            
            {
  "Records": [
    {
      "cf": {
        "config": {
          "distributionId": "EXAMPLE"
        },
        "request": {
          "headers": {
            "host": [
              {
                "key": "Host",
                "value": "d123.cf.net"
              }
            ],
            "user-name": [
              {
                "key": "User-Name",
                "value": "CloudFront"
              }
            ]
          },
          "clientIp": "1111:2222:3333:4444",
          "uri": "/piyo",
          "method": "GET"
        },
        "response": {
          "status": "200",
          "statusDescription": "OK",
          "headers": {
            "x-cache": [
              {
                "key": "X-Cache",
                "value": "Hello from Cloudfront"
              }
            ]
          }
        }
      }
    }
  ]
}
        

            
            Response
{
  "headers": {
    "host": [
      {
        "key": "Host",
        "value": "d123.cf.net"
      }
    ],
    "user-name": [
      {
        "key": "User-Name",
        "value": "CloudFront"
      }
    ]
  },
  "clientIp": "1111:2222:3333:4444",
  "uri": "/piyo/index.html",
  "method": "GET"
}

Function Logs
START RequestId: ************************** Version: $LATEST
2021-03-14T08:24:23.279Z ****************** INFO +++ Direct To +++
2021-03-14T08:24:23.282Z ****************** INFO /piyo/index.html
END RequestId: **************************
REPORT RequestId: ************************* Duration: 5.96 ms Billed Duration: 6 ms Memory Size: 128 MB Max Memory Used: 65 MB Init Duration: 148.17 ms
        

            
            {
  "Records": [
    {
      "cf": {
        //...
          "uri": "/fuga",
        //...
        

            
            Response
{
  "status": "301",
  "statusDescription": "Moved Permanently",
  "headers": {
    "location": [
      {
        "key": "Location",
        "value": "https://hoge-s3-blog.jp/fuga/index.html"
      }
    ]
  }
}

Function Logs
START RequestId: ********************* Version: $LATEST
2021-03-14T08:17:18.965Z ************* INFO +++ Redirect To +++
2021-03-14T08:17:18.965Z ************* INFO https://hoge-s3-blog.jp/fuga/index.html
END RequestId: *********************
REPORT RequestId: ******************** Duration: 2.44 ms Billed Duration: 3 ms Memory Size: 128 MB Max Memory Used: 65 MB