The http protocol does not support wildcards like that. The same applies to the ftp protocol.They also do not support iteration with FileList().
If these are sharepoint files, try to access them from the network folder, rather than via sharepoint.
If they are web files, you will need to know the full file names. For FTP you can run an LS command and get the file list into a local file which you can then read. For http files, it depends on the web site.
Logic will get you from a to b. Imagination will take you everywhere. - A Einstein