Using API to get a list of *direct* url's to images in a folder

We're building an app in Python that will need to retrieve a list of every file in a particular folder containing jpg images, and for each image, we need to get a direct http url that can be used in an html img src tag.  We also need the original image file name (the name humans see when the view a list of files e.g. image1.jpg)

When testing the api using list_folder, we get back the original file names and other metadata like the file id.  But how do we create a url for each file?  

It seems like Dropbox is preventing or discouraging this practice perhaps to reduce load on their servers from people hosting images used on high-traffic sites.  But we're not doing that.

Thanks