On 10/12/07, Mr Modz [EMAIL PROTECTED] wrote:
Is it possible to write a web app in such a way that you could compress a
file into a zip or a tar file for the user before uploading it? I'm looking
to find a way to use coldfusion or flash to allow a user to select a group
of files to be uploaded. After they select the files, I would want to
compress them into a single zip file and then upload them. Then once the
file transfer is complete, uncompress them and store them. I wouldn't care
if it was windows specific and I was thinking it would work if I could some
how invoke the built in windows zip compression functions before the
upload. Does this sound possible with coldfusion?
Not if by with coldfusion you mean for CF to do the compression. In the
scenario you describe, ColdFusion won't play a part until the file is
actually uploaded (onto the ColdFusion server). The compression part would
have to take place in the web browser, which is a place ColdFusion can't
touch. In theory you could do this with Javascript running in the web page.
However, you're likely to run afoul of Javascript security policies. There
are several policies in place to prevent malicious scripts from grabbing
local files (your cookies, your Windows patch level, etc) and sending them
to remote locations where evildoers could do evil with them.
Firefox/Netscape/Mozilla does have a signed script path but that sounds
onerous to me and it's not guaranteed to work with IE. And then there's the
more practical matter of finding a compression engine that is written in
Javascript.
Why not simply upload the file, compress it, then discard the uncompressed
version?
--
Howard Fore, [EMAIL PROTECTED]
Whether you believe you can do a thing or not, you are right. -- Henry
Ford
-
Annual Sponsor FigLeaf Software - http://www.figleaf.com
To unsubscribe from this list, manage your profile @
http://www.acfug.org?fa=login.edituserform
For more info, see http://www.acfug.org/mailinglists
Archive @ http://www.mail-archive.com/discussion%40acfug.org/
List hosted by http://www.fusionlink.com
-
