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<H1>[99s-extend] cowboy_rest and delete_completed and response</H1>
<B>Stéphane Wirtel</B>
<A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20cowboy_rest%20and%20delete_completed%20and%20response&In-Reply-To=%3C90BE6FF2-659A-487A-AB91-C968658CE3D3%40wirtel.be%3E"
TITLE="[99s-extend] cowboy_rest and delete_completed and response">stephane at wirtel.be
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<I>Wed Aug 27 00:12:00 CEST 2014</I>
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<PRE>What's the purpose of the callbacks in content_types_accepted and
content_types_provided?
I prefer set the response in the State to the callbacks and they convert
it to the right format.
Example:
delete_completed(Req, State) ->
Response = [{<<"ok">>, <<"dbname">>}],
{true, Req, State#state{response=Response}}.
get_json(Req, #{response=Response}=State) ->
Body = jsx:encode(Response),
{Body, Req, State}.
get_msgpack(Req, #{response=Response}=State) ->
Body = msgpack:pack(Response, [{format, jsx}],
{Body, Req, State}.
On 27 Aug 2014, at 0:03, Loïc Hoguin wrote:
><i> Call cowboy_req:meta(media_type, Req) to retrieve it.
</I>><i>
</I>><i> On 08/27/2014 12:59 AM, Stéphane Wirtel wrote:
</I>>><i> Hi all,
</I>>><i>
</I>>><i> I work with two content-types (json, msgpack).
</I>>><i>
</I>>><i> In the DELETE verb, I need to return an object and in this case, I
</I>>><i> work
</I>>><i> on delete_resource/2 and delete_completed/2.
</I>>><i> The problem is, how can I return a body in function of the
</I>>><i> content-type?
</I>>><i> because after delete_completed, there is a call to the
</I>>><i> cowboy_rest:has_resp_body function and I need to set the body of the
</I>>><i> response.
</I>>><i>
</I>>><i> delete_completed(Req, State) ->
</I>>><i> Body = Json or MsgPack ? <-- Which content ?
</I>>><i>
</I>>><i> Req2 = cowboy_req:set_resp_body(Body, Req),
</I>>><i> {true, Req2, State}.
</I>>><i>
</I>>><i> Ok, but in this case, what's the reason of content_types_provided/2
</I>>><i> and
</I>>><i> content_types_accepted/2 ?
</I>>><i>
</I>>><i> Thank you,
</I>>><i>
</I>>><i> Stephane
</I>>><i>
</I>>><i>
</I>>><i> --
</I>>><i> Stéphane Wirtel - <A HREF="http://wirtel.be">http://wirtel.be</A> - @matrixise
</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>><i> --
</I>><i> Loïc Hoguin
</I>><i> <A HREF="http://ninenines.eu">http://ninenines.eu</A>
</I>
--
Stéphane Wirtel - <A HREF="http://wirtel.be">http://wirtel.be</A> - @matrixise
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