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   <H1>[99s-extend] Accept header in POST request</H1>
    <B>Lo&#239;c Hoguin</B> 
    <A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20Accept%20header%20in%20POST%20request&In-Reply-To=%3C52EFDEA4.6050004%40ninenines.eu%3E"
       TITLE="[99s-extend] Accept header in POST request">essen at ninenines.eu
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    <I>Mon Feb  3 19:23:32 CET 2014</I>
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<PRE>The content-type provided is relevant for any response, not just 
responses to GET requests. It defaults to text/html. If your client 
doesn't send that content-type, you have to define the callback.

I notice that the documentation is incorrect about the relevant methods 
for this callback, I will open a ticket to fix it soon.

On 02/03/2014 07:13 PM, &#321;ukasz Biedrycki wrote:
&gt;<i> Hi,
</I>&gt;<i> I have a rest handler that accepts POST and PUT requests with
</I>&gt;<i> &#8220;application/json&#8221; content type.
</I>&gt;<i>
</I>&gt;<i> I have content_types_accepted function defined as follows:
</I>&gt;<i>
</I>&gt;<i> content_types_accepted(Req, State) -&gt;
</I>&gt;<i>
</I>&gt;<i>
</I>&gt;<i> {[{&#8216;application/json', from_json}], Req, State}.
</I>&gt;<i>
</I>&gt;<i>
</I>&gt;<i>
</I>&gt;<i> The problem I have is within a request that has two headers:
</I>&gt;<i>
</I>&gt;<i> *Content-type*: application/json
</I>&gt;<i> *Accept*: application/json
</I>&gt;<i>
</I>&gt;<i> With this combination I receive *406*.
</I>&gt;<i>
</I>&gt;<i> You can repeat it with test:
</I>&gt;<i>
</I>&gt;<i> http_SUITE.erl:
</I>&gt;<i> 1072 rest_postonly(Config) -&gt;
</I>&gt;<i> 1073     Client = ?config(client, Config),
</I>&gt;<i> 1074     Headers = [
</I>&gt;<i> 1075         {&lt;&lt;&quot;content-type&quot;&gt;&gt;, &lt;&lt;&quot;text/plain&quot;&gt;&gt;},
</I>&gt;<i> 1076         {&lt;&lt;&quot;accept&quot;&gt;&gt;, &lt;&lt;&quot;text/plain&quot;&gt;&gt;}
</I>&gt;<i> 1077     ],
</I>&gt;<i> 1078     {ok, Client2} = cowboy_client:request(&lt;&lt;&quot;POST&quot;&gt;&gt;,
</I>&gt;<i> 1079         build_url(&quot;/postonly&quot;, Config), Headers, &quot;12345&quot;, Client),
</I>&gt;<i> 1080     {ok, 204, _, _} = cowboy_client:response(Client2).
</I>&gt;<i>
</I>&gt;<i> My solution to that was to add a content_types_provided function:
</I>&gt;<i>
</I>&gt;<i>
</I>&gt;<i> content_types_provided(Req, State) -&gt;
</I>&gt;<i>
</I>&gt;<i>
</I>&gt;<i> ContentTypes = [{{&lt;&lt;&quot;application&quot;&gt;&gt;, &lt;&lt;&quot;json&quot;&gt;&gt;, '*'}, to_json}],
</I>&gt;<i>
</I>&gt;<i>
</I>&gt;<i> {ContentTypes, Req, State}.
</I>&gt;<i>
</I>&gt;<i>
</I>&gt;<i>
</I>&gt;<i> But it is useless as *to_json* callback registered is not called anyhow.
</I>&gt;<i>
</I>&gt;<i> Adding *content_types_provided* function is a correct solution in this case?
</I>&gt;<i> Or I am missing something here?
</I>&gt;<i> &#8220;Accept&#8221; header is not relevant only in case of GET requests?
</I>&gt;<i>
</I>&gt;<i> Thank for help,
</I>&gt;<i> &#321;ukasz Biedrycki
</I>&gt;<i>
</I>&gt;<i>
</I>&gt;<i> _______________________________________________
</I>&gt;<i> Extend mailing list
</I>&gt;<i> <A HREF="https://lists.ninenines.eu/listinfo/extend">Extend at lists.ninenines.eu</A>
</I>&gt;<i> <A HREF="https://lists.ninenines.eu/listinfo/extend">https://lists.ninenines.eu/listinfo/extend</A>
</I>&gt;<i>
</I>
-- 
Lo&#239;c Hoguin
<A HREF="http://ninenines.eu">http://ninenines.eu</A>

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