If file is downloaded from a web server via a browser with standard HTML link, then it is possible that the file name will be HTML encoded with %20 for spaces, etc. These should be removed for clarity prior to processing. Part of pre-process checks alongside #4 and #5.
yulqen
commented
5 years ago 
If file is downloaded from a web server via a browser with standard HTML link, then it is possible that the file name will be HTML encoded with
%20for spaces, etc. These should be removed for clarity prior to processing. Part of pre-process checks alongside #4 and #5.