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<H1>[99s-extend] Cowboy unexpectedly timing out when reading the body</H1>
<B>Phillips, Christopher</B>
<A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Cowboy%20unexpectedly%20timing%20out%20when%20reading%20the%0A%20body&In-Reply-To=%3CCF48CD10.16B7C%25christopher.phillips%40turner.com%3E"
TITLE="[99s-extend] Cowboy unexpectedly timing out when reading the body">Christopher.Phillips at turner.com
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<I>Fri Mar 14 20:13:31 CET 2014</I>
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<PRE> Hmm, okay. Thanks Loic.
On 3/14/14, 3:11 PM, "Loïc Hoguin" <<A HREF="https://lists.ninenines.eu/listinfo/extend">essen at ninenines.eu</A>> wrote:
><i>Yep, only once. All functions that return {ok, ...} are like this.
</I>><i>There's no right approach, that's left as an exercise to the developer.
</I>>:<i>-)
</I>><i>
</I>><i>You can probably use cowboy_req:set_meta/meta if you really need to pass
</I>><i>it around.
</I>><i>
</I>><i>On 03/14/2014 08:07 PM, Phillips, Christopher wrote:
</I>>><i> This body is -small-. 48 bytes was my test data (per the
</I>>><i> content-length). That shouldn't take 5 seconds to read, and usually it
</I>>><i> took a millisecond or two, and returned to the client (despite actually
</I>>><i> controlling some hardware across a network and such) within a second.
</I>>><i>And
</I>>><i> it was ND; I tested this thing a couple of times locally and it appeared
</I>>><i> to work, and even deployed onto a VM it worked some of the time (as I
</I>>><i> said, might have been hardware or some other weirdness).
</I>>><i>
</I>>><i> So can we only read the body once? Or what's the right approach if I
</I>>><i> want to access the body in both a module registered to the
</I>>><i> onrequest/onresponse callbacks, and in the REST handler?
</I>>><i>
</I>>><i> On 3/14/14, 2:56 PM, "Loïc Hoguin" <<A HREF="https://lists.ninenines.eu/listinfo/extend">essen at ninenines.eu</A>> wrote:
</I>>><i>
</I>>>><i> Cowboy does have a timeout too small, that will be fixed soon (by
</I>>>><i>making
</I>>>><i> it configurable, per body-reading call). It will be in the next
</I>>>><i>release.
</I>>>><i>
</I>>>><i> On the other hand there's something weird in what you said.
</I>>>><i>
</I>>>><i> On 03/14/2014 07:52 PM, Phillips, Christopher wrote:
</I>>>>><i> first check the body with cowboy_req:body(Request) as part of an
</I>>>>><i>access
</I>>>>><i> log, then ignore the returned cowboy_req:req() that call passed back,
</I>>>>><i> since we could not then stream the body off of it again. It was
</I>>>>><i>working
</I>>>>><i> fine, so I don't think it was related, but it seems more solid now
</I>>>>><i>after
</I>>>>><i> I removed it and I don't know if that's related or not.
</I>>>><i>
</I>>>><i> If you ignore the Req being returned, especially after a body-reading
</I>>>><i> call, then Cowboy will not be able to figure out that you actually read
</I>>>><i> it, and will attempt to read it again to skip it, leading to issues.
</I>>>><i>
</I>>>><i> --
</I>>>><i> Loïc Hoguin
</I>>>><i> <A HREF="http://ninenines.eu">http://ninenines.eu</A>
</I>>><i>
</I>><i>
</I>><i>--
</I>><i>Loïc Hoguin
</I>><i><A HREF="http://ninenines.eu">http://ninenines.eu</A>
</I>
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