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%% Feel free to use, reuse and abuse the code in this file.
%% @doc POST echo handler.
-module(toppage_handler).
-export([init/2]).
init(Req, Opts) ->
Method = cowboy_req:method(Req),
HasBody = cowboy_req:has_body(Req),
Req2 = maybe_echo(Method, HasBody, Req),
{ok, Req2, Opts}.
maybe_echo(<<"POST">>, true, Req) ->
{ok, PostVals, Req2} = cowboy_req:read_urlencoded_body(Req),
Echo = proplists:get_value(<<"echo">>, PostVals),
echo(Echo, Req2),
Req2;
maybe_echo(<<"POST">>, false, Req) ->
cowboy_req:reply(400, [], <<"Missing body.">>, Req),
Req;
maybe_echo(_, _, Req) ->
%% Method not allowed.
cowboy_req:reply(405, Req),
Req.
echo(undefined, Req) ->
cowboy_req:reply(400, [], <<"Missing echo parameter.">>, Req);
echo(Echo, Req) ->
cowboy_req:reply(200, #{
<<"content-type">> => <<"text/plain; charset=utf-8">>
}, Echo, Req).
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