converting %20 to spaces

[ketulp_baroda at yahoo.com]

Hi
I am storing the attachments in files on the server.User can see all
the attachments & view any of them.
My application shows the attachment correctly for file which have no
spaces in their name.
But it doesnt works for file names with spaces.As the spaces are
converted to %20.It gives an error:No such file or directory.
How do I avoid converting of spaces to %20??
Also one more problem creeped up.
I am using <input type=file> method for uploading attachmnets..Then I
create a file on the server & copy the contents to that file.When I
display the attachments the text files & html files are displayed
correctly but the image files are distorted.
Do I need to escape sequences or do something else?
Please help