HTTP Download: Server files for downloading with resume support

This class can be used to dynamically serve data from files for download.

It can handle HTTP requests that ask to resume the download of files that were partially downloaded previously. So, it supports any download manager program that the users may employ.

It can serve data from files available on the serve or from dynamically generated data strings.

It can also handle user download abort requests so the download process stops immediately.

The class also supports custom user defined callback functions to handle all steps of the file download process, so it can be customized for special purposes.

You can also tracking user's download bandwidth for this download ( remeber to disable autoexit to use this option )