【TypeScript】AWS S3 署名付きURLで取得する

import { GetObjectCommand, S3Client } from '@aws-sdk/client-s3';
import { getSignedUrl } from '@aws-sdk/s3-request-presigner';
import { Injectable } from '@nestjs/common';
import { createAwsCredentials } from '../config/aws/credentials';
import { PrismaService } from '../prisma/prisma.service';

@Injectable()
export class ImagesService {
  constructor(private prisma: PrismaService) {}

  async getImage(image_id: number): Promise<string> {
    const response = await this.prisma.ImagesModel.findUnique({
      where: { id: image_id },
    });

    if (!response) {
      return '';
    }

    const s3Client = new S3Client({
      region: <AWS_S3_REAGION>,
      credentials: createAwsCredentials(),
    });

    const bucketParams = {
      Bucket: <AWS_S3_BUCKET_NAME>,
      Key: response.image_name,
    };

    const command = new GetObjectCommand(bucketParams);
    return await getSignedUrl(s3Client, command, {
      expiresIn: 30,
    });
  }
}