The module

This is a NPM module (for both nodejs and React) to retrieve basic data about a photo. Using exifr and image-size it retrieves the following:

• some EXIF tags,
• width & height,
• additional details reformatted from the above (prefixed with: PDB).

Its efficiency comes from reading files in chunked mode, only minimum bytes needed to extract EXIF and dimensions. Chunked reading is based on exifr's code.

While one might just use the exifr and then image-size directly, that would lead to reading the file 2 times and image-size actually reads the entire file. With photo-data-basic the file is being read only once and up to the minimum bytes needed. It then calls exifr and image-size using the buffered chunks. This is much better, especially for when reading from HTTP or S3 as it limits the number of network calls needed.

Usage

import { getPhotoData } from "photo-data-basic";

const data = await getPhotoData("./test.jpg")
console.log(data);

Supported protocols

The getPhotoData function can handle these types inputs:

• local file path,
• HTTP/HTTPS URL,
• AWS S3 bucket.

S3 example

import { getPhotoData } from "photo-data-basic";

const data = await getPhotoData("s3://bucket-name/path/image.jpg",
    {
        s3config: {
            region: 'us-east-1',
            credentials: {
                accessKeyId: 'youraccesskey',
                secretAccessKey: 'yoursecretkey'
            }
        }
    }
)