添加 get 與 put S3 的 code

addGetAndPutDataToS3.diff

const axios = require("axios");
+ const aws = require("aws-sdk");

+ const s3 = new aws.S3();
+ const bucketName = "test-firebase-dynamic-links";
+ const s3FileName = "links_map.json";

+ function getDataFromS3() {
+   const params = {
+     Bucket: bucketName,
+     Key: s3FileName,
+   };
+
+   return s3
+     .getObject(params)
+     .promise()
+     .then((resp) => resp.Body.toString("utf-8"))
+     .then((stringData) => JSON.parse(stringData));
+ }

+ function putDataToS3(data) {
+   const params = {
+     Bucket: bucketName,
+     Key: s3FileName,
+     Body: JSON.stringify(data),
+     ContentType: "application/json",
+   };
+
+   return s3.putObject(params).promise();
+ }

const headers = {
  "Access-Control-Allow-Headers": "Content-Type",
  "Access-Control-Allow-Origin": "*",
  "Access-Control-Allow-Methods": "OPTIONS,POST,GET",
}

exports.handler = async (event) => {
  const queryString = event.queryStringParameters || {};
  const { link } = queryString;
+ const s3Data = await getDataFromS3();

+   if (link in s3Data) {
+     const response = {
+       statusCode: 200,
+       headers,
+       body: JSON.stringify({ link: s3Data[link] }),
+     };
+
+     return response;
+   }

  const POST_URL = "https://firebasedynamiclinks.googleapis.com/v1/shortLinks?key=your_key";
  const config = {
    dynamicLinkInfo: {
      domainUriPrefix: "https://xxx.page.link",
      link,
    },
  };

  const axiosResp = await axios.post(POST_URL, config);
  const dynamicLink = axiosResp.data.shortLink;

+ await putDataToS3({ ...s3Data, [link]: dynamicLink });

  const response = {
    statusCode: 200,
    headers,
    body: JSON.stringify({ link: dynamicLink }),
  };

  return response;
};