+haskell-cafe, oops On Thu, Apr 5, 2012 at 11:04 AM, Gregory Collins <g...@gregorycollins.net>wrote:
> On Wed, Apr 4, 2012 at 10:09 PM, tsuraan <tsur...@gmail.com> wrote: > >> > It's hard to rule Snap timeouts out; try building snap-core with the >> > "-fdebug" flag and running your app with "DEBUG=1", you'll get a spew of >> > debugging output from Snap on stderr. >> >> Heh, that was quite a spew. I normally get the exceptions tens of MB >> into files that are hundreds of MB, and I sometimes don't get them at >> all, so printing out the entire request body was a bit slow :) After >> commenting out some of the more talkative debug statements, I got the >> exception to happen, and it looks generally like this: >> > > I think I might know what your problem is. You're accepting file uploads > using handleMultipart, yes? Snap kills uploads that are going too slow, > otherwise you would be vulnerable to slowloris ( > http://ha.ckers.org/slowloris/) DoS attacks. What's probably happening > here is that you're doing slow work inside the "Iteratee IO a" handler you > pass to that function, which makes Snap think the client is trickling bytes > to you. If that's the case, either finish the iteratee more quickly and do > the slow work back in the Snap handler (preferable), or disable the minimum > upload rate guard (although that's not recommended on a server talking to > the public internet.) > > G > -- > Gregory Collins <g...@gregorycollins.net> > -- Gregory Collins <g...@gregorycollins.net>
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