%% Feel free to use, reuse and abuse the code in this file. %% @doc POST echo handler. -module(toppage_handler). -export([init/3]). -export([handle/2]). -export([terminate/2]). init(_Transport, Req, []) -> {ok, Req, undefined}. handle(Req, State) -> {Method, Req2} = cowboy_http_req:method(Req), {HasBody, Req3} = cowboy_http_req:has_body(Req2), {ok, Req4} = maybe_echo(Method, HasBody, Req3), {ok, Req4, State}. maybe_echo('POST', true, Req) -> {PostVals, Req2} = cowboy_http_req:body_qs(Req), Echo = proplists:get_value(<<"echo">>, PostVals), echo(Echo, Req2); maybe_echo('POST', false, Req) -> cowboy_http_req:reply(400, [], <<"Missing body.">>, Req); maybe_echo(_, _, Req) -> %% Method not allowed. cowboy_http_req:reply(405, Req). echo(undefined, Req) -> cowboy_http_req:reply(400, [], <<"Missing echo parameter.">>, Req); echo(Echo, Req) -> cowboy_http_req:reply(200, [{<<"Content-Encoding">>, <<"utf-8">>}], Echo, Req). terminate(_Req, _State) -> ok.