> -----Original Message----- > From: Jason Pruim [mailto:japruim@xxxxxxxxxx] > Sent: Monday, September 08, 2008 10:48 AM > To: Boyd, Todd M. > Cc: php-general@xxxxxxxxxxxxx; Craige Leeder > Subject: Re: Large/unreliable file uploading over HTTP > > > On Sep 8, 2008, at 11:25 AM, Boyd, Todd M. wrote: > > >> -----Original Message----- > >> From: Craige Leeder [mailto:cleeder@xxxxxxxxx] > >> Sent: Monday, September 08, 2008 8:49 AM > >> To: mike > >> Cc: PHP General list > >> Subject: Re: Large/unreliable file uploading over HTTP > >> > >> The only concern I would have is that you are using a third party > >> software/applet to do these uploads. I'm not a fan of MAKING users > >> have > >> a piece of software enabled to allow them basic web-standard > >> functionality on a site. > >> > >> It is however, an interesting concept. It would really come in handy > >> for > >> extremely large files. > >> > >> - Craige > >> > >> mike wrote: > >>> Let's face it - HTTP is not very good for file uploads. It's > >> stateless > >>> nature, slow connections, inability to resume (technically), etc, > >> etc. > >>> > >>> What I've been thinking about is a way to skip all the normal > >>> annoyances with file uploading - multipart form encodings, file > >> upload > >>> tools with specific needs, PUT vs POST, connection resets, ... the > >>> list goes on and on. > > > > ---8<--- snip! > > > >>> I can't think of any method to do it in-browser, but doing it this > >> way > >>> could open the gates for things like Google Gears to possibly work > >>> too... > > > > I have an "almost-fully-functional" Java Applet file uploader. > > Progress bar, unlimited* file size, blah blah blah... can hook into > > nearly any language on the other end (though I'm currently working > > with PHP). Some bytes are missing from the resulting file when I try > > to upload an MP3, but it's a work in progress. > > > > I don't see the problem with using a Java Applet or something that > > is easily installed on-demand. Java doesn't quite have the > > widespread adoption I would hope for, but it definitely makes its' > > way around. > > Hey Todd, > > This sounds exactly like what my day job needs... I just took over the > website, and currently they have it where people have to ftp the file > into their server to get large files, and with them being a print > shop... A couple gigs per job is not unheard of. > > If there is anything that I can do to help get that finished up let me > know! :) Jason, I'd be more than happy to spread the source around. Files of any size are not a problem... the Applet breaks a file into (I believe) 512kb chunks for transfer. The first POST to PHP tells PHP how many chunks and some other identifying information. Each POST after that is a 512k chunk of the file. These files are then strung back together after the last chunk is uploaded. I probably need to do some hash checking to ensure that files have, in fact, uploaded (and uploaded completely)... but for testing on my local machine, I didn't bother (yet). The problem is that a few bytes (depending on the size of the file--and therefore, the number of chunks) are missing from the uploaded file. This makes MP3s sound like they were recorded underwater, and text files miss a letter every now and again. I'll dig through the code I have for it when I get home from work this evening. To be honest, I haven't poked around it for some time now--a month, perhaps?--and it might take me a day or two to make sense of it all again. :) Anyway, I'll e-mail you what I've got so far and see what you can make of it. I had begun to find a pattern in the missing information with a "Diff"-like text editor and a notepad (yes, the physical kind made of paper :D), but I was forced to abandon it for "real" work as the uploader is a side project of mine. If anybody else is interested in the PHP/Java Applet source, I am glad to share it. I started working on it myself for a friend's website when I discovered that people are actually charging money for software packages that accomplish this (seemingly) simple process. Todd Boyd Web Programmer -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
