<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<TITLE> [99s-extend] timeouts and slow clients in cowboy loop handler
</TITLE>
<LINK REL="Index" HREF="index.html" >
<LINK REL="made" HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20timeouts%20and%20slow%20clients%20in%20cowboy%20loop%20handler&In-Reply-To=%3CCA%2BeMAwbGgYLp0W2esA204iZ0sumV2dBBN6ppbqD29ZKow%2Bts3A%40mail.gmail.com%3E">
<META NAME="robots" CONTENT="index,nofollow">
<style type="text/css">
pre {
white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */
}
</style>
<META http-equiv="Content-Type" content="text/html; charset=us-ascii">
<LINK REL="Previous" HREF="000240.html">
<LINK REL="Next" HREF="000242.html">
</HEAD>
<BODY BGCOLOR="#ffffff">
<H1>[99s-extend] timeouts and slow clients in cowboy loop handler</H1>
<B>akonsu</B>
<A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20timeouts%20and%20slow%20clients%20in%20cowboy%20loop%20handler&In-Reply-To=%3CCA%2BeMAwbGgYLp0W2esA204iZ0sumV2dBBN6ppbqD29ZKow%2Bts3A%40mail.gmail.com%3E"
TITLE="[99s-extend] timeouts and slow clients in cowboy loop handler">akonsu at gmail.com
</A><BR>
<I>Fri Sep 20 20:59:46 CEST 2013</I>
<P><UL>
<LI>Previous message: <A HREF="000240.html">[99s-extend] timeouts and slow clients in cowboy loop handler
</A></li>
<LI>Next message: <A HREF="000242.html">[99s-extend] timeouts and slow clients in cowboy loop handler
</A></li>
<LI> <B>Messages sorted by:</B>
<a href="date.html#241">[ date ]</a>
<a href="thread.html#241">[ thread ]</a>
<a href="subject.html#241">[ subject ]</a>
<a href="author.html#241">[ author ]</a>
</LI>
</UL>
<HR>
<!--beginarticle-->
<PRE>Understand about chunks being synchronous. that helps me tremendously to
understand how it works.
would you give me a sketchy example of how to use send_after in a loop
handler? (sorry I am new to erlang)
Konstantin
2013/9/20 Loïc Hoguin <<A HREF="https://lists.ninenines.eu/listinfo/extend">essen at ninenines.eu</A>>
><i> chunk only returns when the client has received the chunk, so the
</I>><i> timestamps solution should work.
</I>><i>
</I>><i> As for the timeout, you can simply use erlang:send_after or something like
</I>><i> usual and the message will arrive in info/3.
</I>><i>
</I>><i>
</I>><i> On 09/20/2013 08:54 PM, akonsu wrote:
</I>><i>
</I>>><i> thanks!
</I>>><i>
</I>>><i> how to implement timeout callback manually? if I had receive then I
</I>>><i> would just use timeout clause there, but with the handler I do not know...
</I>>><i>
</I>>><i> I have doubts about validity of my question on the erlang list. I later
</I>>><i> realised that there is no problem receiving messages in my handler from
</I>>><i> my upstream process, I can do it fast enough and shove everything to the
</I>>><i> response. my real problem is to determine if the http client is reading
</I>>><i> fast enough from the response...
</I>>><i>
</I>>><i>
</I>>><i> 2013/9/20 Loïc Hoguin <<A HREF="https://lists.ninenines.eu/listinfo/extend">essen at ninenines.eu</A> <mailto:<A HREF="https://lists.ninenines.eu/listinfo/extend">essen at ninenines.eu</A>>>
</I>>><i>
</I>>><i>
</I>>><i> Loop handlers close after a while regardless of what you send, it
</I>>><i> only checks what the client sends. The best way for you would be to
</I>>><i> disable that timeout and handle it manually.
</I>>><i>
</I>>><i> As for the second question, I'm still reading the thread on
</I>>><i> erlang-questions but I've seen some good ideas about timestamps so
</I>>><i> far.
</I>>><i>
</I>>><i>
</I>>><i> On 09/20/2013 08:47 PM, akonsu wrote:
</I>>><i>
</I>>><i> Hi,
</I>>><i>
</I>>><i> I am using loop handler and I stream from it:
</I>>><i>
</I>>><i> info({stream, Part}, Req, S) ->
</I>>><i> ok = cowboy_req:chunk(Part, Req),
</I>>><i> {loop, Req, S, hibernate};
</I>>><i>
</I>>><i> I have two questions:
</I>>><i>
</I>>><i> 1. on timeouts cowboy sends 204 No Content. In my case it is not
</I>>><i> the
</I>>><i> right response because I may have already sent some data. Is
</I>>><i> there a way
</I>>><i> to send a custom response?
</I>>><i>
</I>>><i> 2. how to check if the client is too slow and is not reading the
</I>>><i> response stream fast enough? If this happens, then I need to
</I>>><i> disconnect.
</I>>><i>
</I>>><i> I can live without 1. but I need to figure out 2. Please help.
</I>>><i>
</I>>><i> thank you!
</I>>><i> Konstantin
</I>>><i>
</I>>><i>
</I>>><i>
</I>>><i> ______________________________**___________________
</I>>><i> Extend mailing list
</I>>><i> <A HREF="https://lists.ninenines.eu/listinfo/extend">Extend at lists.ninenines.eu</A> <mailto:<A HREF="https://lists.ninenines.eu/listinfo/extend">Extend at lists.</A>**ninenines.eu<<A HREF="https://lists.ninenines.eu/listinfo/extend">Extend at lists.ninenines.eu</A>>
</I>>><i> >
</I>>><i> <A HREF="http://lists.ninenines.eu:81/_**_listinfo/extend<http://lists.ninenines.eu:81/__listinfo/extend">http://lists.ninenines.eu:81/_**_listinfo/extend<http://lists.ninenines.eu:81/__listinfo/extend</A>>
</I>>><i>
</I>>><i> <<A HREF="http://lists.ninenines.eu:81/**listinfo/extend<http://lists.ninenines.eu:81/listinfo/extend">http://lists.ninenines.eu:81/**listinfo/extend<http://lists.ninenines.eu:81/listinfo/extend</A>>
</I>>><i> >
</I>>><i>
</I>>><i>
</I>>><i>
</I>>><i> --
</I>>><i> Loďc Hoguin
</I>>><i> Erlang Cowboy
</I>>><i> Nine Nines
</I>>><i> <A HREF="http://ninenines.eu">http://ninenines.eu</A>
</I>>><i>
</I>>><i>
</I>>><i>
</I>><i>
</I>><i> --
</I>><i> Loïc Hoguin
</I>><i>
</I>><i> Erlang Cowboy
</I>><i> Nine Nines
</I>><i> <A HREF="http://ninenines.eu">http://ninenines.eu</A>
</I>><i>
</I>-------------- next part --------------
An HTML attachment was scrubbed...
URL: <<A HREF="http://lists.ninenines.eu/archives/extend/attachments/20130920/4c005881/attachment.html">http://lists.ninenines.eu/archives/extend/attachments/20130920/4c005881/attachment.html</A>>
</PRE>
<!--endarticle-->
<HR>
<P><UL>
<!--threads-->
<LI>Previous message: <A HREF="000240.html">[99s-extend] timeouts and slow clients in cowboy loop handler
</A></li>
<LI>Next message: <A HREF="000242.html">[99s-extend] timeouts and slow clients in cowboy loop handler
</A></li>
<LI> <B>Messages sorted by:</B>
<a href="date.html#241">[ date ]</a>
<a href="thread.html#241">[ thread ]</a>
<a href="subject.html#241">[ subject ]</a>
<a href="author.html#241">[ author ]</a>
</LI>
</UL>
<hr>
<a href="https://lists.ninenines.eu/listinfo/extend">More information about the Extend
mailing list</a><br>
</body></html>
