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| author | Loïc Hoguin <[email protected]> | 2016-08-29 12:39:49 +0200 |
|---|---|---|
| committer | Loïc Hoguin <[email protected]> | 2016-08-29 12:40:03 +0200 |
| commit | c807880f7ac73f813b2660ea81a00f7712a4e793 (patch) | |
| tree | ba1d09e9b177f230665a80513b33fbd532000ce4 /archives/extend/2014-September/000462.html | |
| parent | b1df25a7d9cda697513650659b781b55b40898f8 (diff) | |
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diff --git a/archives/extend/2014-September/000462.html b/archives/extend/2014-September/000462.html new file mode 100644 index 00000000..f8727d7c --- /dev/null +++ b/archives/extend/2014-September/000462.html @@ -0,0 +1,101 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<HTML> + <HEAD> + <TITLE> [99s-extend] Using cowboy_req:body more than once per request + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Using%20cowboy_req%3Abody%20more%20than%20once%20per%20request&In-Reply-To=%3C541766A3.4070309%40ninenines.eu%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="000458.html"> + <LINK REL="Next" HREF="000463.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[99s-extend] Using cowboy_req:body more than once per request</H1> + <B>Loïc Hoguin</B> + <A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Using%20cowboy_req%3Abody%20more%20than%20once%20per%20request&In-Reply-To=%3C541766A3.4070309%40ninenines.eu%3E" + TITLE="[99s-extend] Using cowboy_req:body more than once per request">essen at ninenines.eu + </A><BR> + <I>Tue Sep 16 00:22:27 CEST 2014</I> + <P><UL> + <LI>Previous message: <A HREF="000458.html">[99s-extend] Using cowboy_req:body more than once per request +</A></li> + <LI>Next message: <A HREF="000463.html">[99s-extend] Using cowboy_req:body more than once per request +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#462">[ date ]</a> + <a href="thread.html#462">[ thread ]</a> + <a href="subject.html#462">[ subject ]</a> + <a href="author.html#462">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>It seems a bit weird to me to read the body and validate it before +validating the request itself. + +I would explicitly put these checks in the handler directly. This of +course means that there is no need to read it twice anymore. + +On 09/15/2014 11:24 PM, Paulo F. Oliveira wrote: +><i> Hi. +</I>><i> +</I>><i> I recently implemented a checksum header (X-Checksum) that allows +</I>><i> validating the content of a request's body by hash comparison (just to +</I>><i> give you some context). I'm using the onrequest hook to affect all +</I>><i> requests (and be able to reply appropriately for non-conformance to the +</I>><i> hash function result) but can't figure out how to not read the request +</I>><i> body twice, i.e. I read it in the onrequest hook but later on need to +</I>><i> read it again in the route handler, but I can't (from the manual, for +</I>><i> cowboy_req:body: "This function can only be called once. Cowboy will not +</I>><i> cache the result of this call."). At the moment, and because the API +</I>><i> consumers were in a hurry, the solution I found (I understand it might +</I>><i> be an ugly hack), was to read the body, store it in the Req's meta +</I>><i> (property body, for example) and then access that property later on, +</I>><i> instead of using cowboy_req:body. I'm not quite happy with this solution +</I>><i> and was wondering if there is anything more elegant that I can implement. +</I>><i> +</I>><i> Thanks. +</I>><i> +</I>><i> Cheers. +</I>><i> +</I>><i> - Paulo F. Oliveira +</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> +</I>><i> <A HREF="https://lists.ninenines.eu/listinfo/extend">https://lists.ninenines.eu/listinfo/extend</A> +</I>><i> +</I> +-- +Loïc Hoguin +<A HREF="http://ninenines.eu">http://ninenines.eu</A> +</PRE> + + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="000458.html">[99s-extend] Using cowboy_req:body more than once per request +</A></li> + <LI>Next message: <A HREF="000463.html">[99s-extend] Using cowboy_req:body more than once per request +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#462">[ date ]</a> + <a href="thread.html#462">[ thread ]</a> + <a href="subject.html#462">[ subject ]</a> + <a href="author.html#462">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="https://lists.ninenines.eu/listinfo/extend">More information about the Extend +mailing list</a><br> +</body></html> |