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 -------------------------------------------------------------
