I am using NodeJS, but I don't know if there are better tools.

From an Angular client the user can upload a *dxf ora a *svg file. The images in the file display a red and a black figure.
I have to calculate the area (on client or server side) of the black figure and the perimeter of the red one from the file.
The user can also upload a *stl file, and I have to calcualte the Volume of the object in the *stl.

I don't even know where to start or what tools I should use