How to read an image file in node js?

Question

I am trying to read an image and text files and upload to aws s3 bucket using nodejs fs module. I am not using any express server, but plain javascript that calls aws-sdk and uploads items to aws-s3.

Here is how my project structure looks like

Inside s3.js I am trying to read the 2.png and friends.json files, s3.js

const fs = require('fs');
const file = fs.readFileSync('../public/2.png', (err)=>console.log(err.message));

But this throw and error

Error: ENOENT: no such file or directory, open '../public/2.png'

What could be going wrong?

Answer 1

Could always try an absolute path instead of a relative and add encoding:

const fs = require('fs')
const path = require('path')

const image = path.join(__dirname, '../public/2.png')
const file = fs.readFileSync(image, {encoding:'utf8'})

Could also use upng-js with a Promise

const png = require("upng-js")
const fs = require('fs')

async function pngCode(img) {
try {
       return png.decode(await fs.promise.promisify(fs.readFile)(img)
    } catch (err) {
        console.error(err)
    }
}

pngCode('.../public/2.png')

None of the code is tested wrote on my phone.