Node.js: image resizing without ImageMagick

Question

I\'m developing a web app on Node.js (+ express 4) where users can set their profile image by uploading it to the server. We already limit the file mimetype and max filesize

Answer 1

Sharp work very well and is easy to use with streams, work like a charm, but you need to compile it with the node version, this is a downside to it. I was using Sharp for image processing, with an image from an AWS S3 bucket and worked perfectly, but I had to use another module. GM didn't work for me, but Jimp worked very good!

You have to pay attention to the path of the written picture, it might give you some errors if you start the path with a "/".

This is how I used Jimp in nodeJS:

const imageUrl = `SOME_URL`;
let imgExported = 'EXPORTED_PIC.png';

Jimp.read(imageUrl)
    .then(image => {
        image   
            .resize(X, Y) 
            .write(`tmp/`+ imgExported, err => { 
                if(err) 
                    console.error('Write error: ', err);
                else { ... // don't forget to put a callback() } }

            });

Also watch out for the order of execution, put a callback so other things don't happen when you don't want to. Tried using "await" for the Jimp.read() but it didn't do the job well.