World Wide Web servers deliver files to
browsers as requested by the user (for more details
on this, see the WWW
section of this site). If
desired, these files can be saved on the user's
computer. So, transferring files from a server to a
client can be easily accomplished using a site on the
World Wide Web and a client browser. But if users
desire to transfer files from the local computer
(client) to the server, another method is needed. For
example, if we need to load a new web page to a
virtual site, then we need to use another technique.
Some browsers support sending files as
attachments to multipart forms. To use this
technique, the server would contain a specially
designed form which would allow the user to send an
attached file. The server would also contain special
software to take the attached file and store it in a
specific place.
A more general technique uses an FTP (File
Transfer Protocol) client-server system. With this
technique, an FTP server software package is employed
at the server and FTP client software resides on the
local computer. The client software communicates with
the server and permits the user to specify the
directory in which the file(s) are to be stored on
the server. One or more files can be selected for
transfer.
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