Get size of an image from S3 bucket

index.ts

// Wrote this, but because of this issue:
// https://github.com/image-size/image-size/issues/37
// had to switch to https://www.npmjs.com/package/probe-image-size

import * as sizeOf from 'image-size';

export const getImageSize = (bucket: string) => (
  key: string
): Promise<ImageSize> =>
  new Promise((resolve, reject) => {
    const req = s3.getObject({
      Bucket: bucket,
      Key: key
    });

    let buffer = Buffer.from([]);

    req
      .on('httpData', chunk => {
        buffer = Buffer.concat([buffer, chunk]);

        try {
          const fs = require('fs');
          fs.writeFileSync('buffer.json', JSON.stringify(buffer));
          resolve(sizeOf(buffer));
        } catch (error) {
          // Handle image-size related errors
          reject(error);
        }

        req.abort();
      })
      // Handle aws related errors
      .on('error', reject)
      .send();
  });