Yeah, I can attest to it being totally like a DOS attack under CF5... that's what we still run...
I have ran it on the same switch with the same computer feeding the file as running CF... I have tried it a desk away.. same effect, an unresponsive APP server... All in Windows of course... Definitely would like to hear more about MacroMedia's evaluation of this item... I plan on running it through more tests just to make sure all is good... In my world I have mostly tested on Win2k and NT under CF5.. using IE 6... Paris Lundis Founder Areaindex, L.L.C. http://www.areaindex.com http://www.pubcrawler.com 412-292-3135 [finding the future in the past, passing the future in the present] [connecting people, places and things] -----Original Message----- From: Christian Cantrell <[EMAIL PROTECTED]> Date: Mon, 20 Jan 2003 23:53:18 -0500 Subject: Re: CFserver Timesout when uploading a 13mb file > I checked on this internally, and it seems that the server writes the > > bytes from the input stream (the file being uploaded) directly to the > > file system, and more specifically to a temp file that then gets > moved > to the specified directory (at least this is the behavior of MX and > ColdFusion 5). From a security standpoint, this is the right > behavior. > It might technically be slightly faster if the server were to try > to > buffer the file in memory, however 1) this is a huge security risk as > > it would clearly be a denial of service attack opening, and 2) > realistically, it probably would not affect the speed considerably if > > at all since the bottleneck is most likely bandwidth rather than the > process of writing the bytes to the file system. In fact, saving the > > file is probably one of the fastest steps in the process. > > As far as why uploads are timing out, I'm really not sure, except > that > I've seen this before, and it is often a client issue, not an issue > with the server. In theory, the client should not time out as long > as > data is moving from the client to the server, however in practice, I > have seen several inexplicable ClientDisconnectExceptions in various > projects in the past. A ClientDisconnectException is a Java > exception > that gets thrown when the client disconnects before it has finished > writing all of the request to the output stream. Wherever a client > has > the opportunity to upload a large file (anything over 1MB), you are > likely to see these errors. Possible causes include users > intentionally stopping the download (the client has no friendly way > to > convey to the server that the user simply changed his mind), clients > timing out due to pitiful dial-up speeds, connections being dropped > by > ISPs or saturated 802.11b networks, browsers crashing, computers > crashing, people tripping over power cords, etc. To be honest, I > don't > know, but I can confirm that it should not be an issue of running out > > of RAM and does not present a security vulnerability in ColdFusion > MX. > > Christian > > On Monday, January 20, 2003, at 02:53 PM, Joshua Miller wrote: > > > I thought it saved it as a TMP file ??? Does it actually store in > RAM ? > > > > Joshua Miller > > Head Programmer / IT Manager > > Garrison Enterprises Inc. > > www.garrisonenterprises.net > > [EMAIL PROTECTED] > > (704) 569-9044 ext. 254 > > > > > ********************************************************************* > ** > > * > > ************* > > Any views expressed in this message are those of the individual > sender, > > except where the sender states them to be the views of > > Garrison Enterprises Inc. > > > > This e-mail is intended only for the individual or entity to which > it > > is > > addressed and contains information that is private and > confidential. If > > you are not the intended recipient you are hereby notified that any > > dissemination, distribution or copying is strictly prohibited. If > you > > have received this e-mail in error please delete it immediately and > > advise us by return e-mail to > [EMAIL PROTECTED] > > > ********************************************************************* > ** > > * > > ************* > > > > > > -----Original Message----- > > From: Todd [mailto:[EMAIL PROTECTED]] > > Sent: Monday, January 20, 2003 2:47 PM > > To: CF-Talk > > Subject: Re: CFserver Timesout when uploading a 13mb file > > > > > > RAM -- CFFILE I believe uploads into pure ram before it dumps to > disk. > > > > ~Todd > > > > At 11:40 AM 1/20/2003 -0800, you wrote: > >> I have a 13mb .doc file being uploaded using a simple CFFILE. The > >> server timesout. After I zipped the file down to a 9mb file, it > was > >> OK. Does anyone know what triggers the limitation? > >> > >> Thanks > >> Michael > > > > > > ---------- > > Todd Rafferty ([EMAIL PROTECTED]) - http://www.web-rat.com/ > > Team Macromedia Volunteer for ColdFusion > > http://www.macromedia.com/support/forums/team_macromedia/ > > http://www.devmx.com/ > > > > ---------- > > > > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribe&forumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Your ad could be here. Monies from ads go to support these lists and provide more resources for the community. http://www.fusionauthority.com/ads.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
