Resizing images

Hello all !!

First things first, let me wish you all a happy 2016 year.

The application I'm building downloads images from the web.

I use :

HTTPGetFile(some_file_url,path_+_image_file_name_to_save');

This goes into a TEMP folder in the application folder, and later this is saved in database with the rest of the infos.

No problem here, everything works fine.

I have chosen to save images in database because too many users would mess up with the folders containing images and I wanted to avoid that.

But with an average of about 300ko per image, database will soon reach 100 of Mo.

My question is, is it possible with a script, before saving into database, to resize pictures while maintaining aspect ratio ?
I've tried a few tricks, but all involved redrawing the picture and calling external addons we can not incorporate in MVD.

Any idea ?

Cheers

Mathias