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<H1>[99s-extend] Mandatory init/3 and optional handle/2 and terminate/3</H1>
<B>Loïc Hoguin</B>
<A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Mandatory%20init/3%20and%20optional%20handle/2%20and%0A%09terminate/3&In-Reply-To=%3C538F93BE.4080002%40ninenines.eu%3E"
TITLE="[99s-extend] Mandatory init/3 and optional handle/2 and terminate/3">essen at ninenines.eu
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<I>Wed Jun 4 23:46:38 CEST 2014</I>
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<PRE>You shouldn't say -behavior(cowboy_http_handler) if you don't actually
implement it.
On 06/04/2014 11:37 PM, Paulo F. Oliveira wrote:
><i> Hello.
</I>><i>
</I>><i> You wrote here
</I>><i> <<A HREF="http://ninenines.eu/docs/en/cowboy/HEAD/manual/cowboy_rest/">http://ninenines.eu/docs/en/cowboy/HEAD/manual/cowboy_rest/</A>> that "The
</I>><i> only mandatory callback is init/3, needed to perform the protocol upgrade."
</I>><i>
</I>><i> In my code I have only this function for the protocol upgrade:
</I>><i>
</I>><i> init({_TransportName, _ProtocolName}, _Req, []) ->
</I>><i> {upgrade, protocol, cowboy_rest}.
</I>><i>
</I>><i> On the other hand, when compiling, I get the following warnings:
</I>><i>
</I>><i> src/handler_transactions.erl:3: Warning: undefined callback function
</I>><i> handle/2 (behaviour 'cowboy_http_handler')
</I>><i> src/handler_transactions.erl:3: Warning: undefined callback function
</I>><i> terminate/3 (behaviour 'cowboy_http_handler')
</I>><i>
</I>><i> Is this the expected behavior? I know I _can_ ignore the warnings, but
</I>><i> not if I want to use Erlang compiler option warnings_as_errors, for example.
</I>><i>
</I>><i> Many thanks.
</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>
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--
Loïc Hoguin
<A HREF="http://ninenines.eu">http://ninenines.eu</A>
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