serverless-framework + serverless-offline で binaryデータを送受信する

アップロード(multipart)

• lambda-multipart-parser

追加

yarn add lambda-multipart-parser

functionへ追加

handler.ts

export const hoge: APIGatewayProxyHandler = async (event, _context) => {
    const MultipartParser = require("lambda-multipart-parser");
    const parsed = await MultipartParser.parse(event);
    const file0 = parsed.files[0];
    const content: Buffer = file0.content;
    ...
);

ダウンロード

設定

• serverless-apigw-binary

- serverless-apigwy-binary

をインストールし、設定する

yarn add serverless-apigw-binary
yarn add serverless-apigwy-binary

serverless.yml

plugins:
  - serverless-apigw-binary
  - serverless-apigwy-binary

custom:
  apigwBinary:
    types:
      - "image/jpeg"
      - "image/png"

functions:
  hoge:
    handler: handler.hoge
    events:
      - http:
          method: get
          path: hoge
          contentHandling: CONVERT_TO_BINARY

functionへ追加

handler.ts

export const hoge: APIGatewayProxyHandler = async (event, _context) => {
    const img64: string; //image as base64
    return { statusCode: 200, headers: { "Content-Type": "image/png" }, isBase64Encoded: true, body: img64 };
};