%% Feel free to use, reuse and abuse the code in this file. -module(http_body_qs). -behaviour(cowboy_http_handler). -export([init/3, handle/2, terminate/3]). init({_, http}, Req, _) -> {ok, Req, undefined}. handle(Req, State) -> Method = cowboy_req:method(Req), HasBody = cowboy_req:has_body(Req), {ok, maybe_echo(Method, HasBody, Req), State}. maybe_echo(<<"POST">>, true, Req) -> case cowboy_req:body_qs(Req) of {badlength, Req2} -> echo(badlength, Req2); {ok, PostVals, Req2} -> echo(proplists:get_value(<<"echo">>, PostVals), Req2) end; maybe_echo(<<"POST">>, false, Req) -> cowboy_req:reply(400, [], <<"Missing body.">>, Req); maybe_echo(_, _, Req) -> %% Method not allowed. cowboy_req:reply(405, Req). echo(badlength, Req) -> cowboy_req:reply(413, [], <<"POST body bigger than 16000 bytes">>, 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). terminate(_, _, _) -> ok.