@opengis/fastify-table/server/plugins/file/providers/s3/funcs/downloadFile.js

core-plugins

import {
  GetObjectCommand,
} from '@aws-sdk/client-s3';

import { readFile } from 'node:fs/promises';
import { createReadStream } from 'node:fs';

import client from '../client.js';

import streamToBuffer from '../../utils/streamToBuffer.js';

// if not found on s3 => fs
import fsFuncs from '../../fs.js';

import getPath from '../../../utils/getPath.js';
import getS3FilePath from './utils/getS3FilePath.js';

const getFileStream = (s3Settings) => async (fp, options = {}) => {
  const filepath = getS3FilePath(fp, s3Settings);
  const s3Client = client.getS3Client(s3Settings);
  const bucketName = s3Settings.containerName;
  const bucketParams = {
    Bucket: bucketName,
    Key: filepath[0] === '/' ? filepath?.slice(1) : filepath,
  };
  try {
    const data = await s3Client.send(new GetObjectCommand(bucketParams));
    if (options.buffer) {
      return streamToBuffer(data.Body);
    }
    return data.Body;
  }
  catch (err) {
    const filepath1 = getPath(fp, options);
    const { fileExists } = fsFuncs();
    const exists = await fileExists(filepath1);
    if (!exists) {
      return null;
    }
    if (options.buffer) {
      return readFile(filepath1);
    }
    const fileStream = createReadStream(filepath1);
    return fileStream;
    // return null;
    // // throw new Error('Файл не знайдено');
  }
};

export default getFileStream;