aboutsummaryrefslogtreecommitdiffstats
path: root/examples/echo_post/src/toppage_handler.erl
blob: 6831c781c8086082f7610c2ceffc9e0fece555e7 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
%% 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/3]).

init(_Transport, Req, []) ->
	{ok, Req, undefined}.

handle(Req, State) ->
	{Method, Req2} = cowboy_req:method(Req),
	HasBody = cowboy_req:has_body(Req2),
	{ok, Req3} = maybe_echo(Method, HasBody, Req2),
	{ok, Req3, State}.

maybe_echo(<<"POST">>, true, Req) ->
	{ok, PostVals, Req2} = cowboy_req:body_qs(Req),
	Echo = proplists:get_value(<<"echo">>, PostVals),
	echo(Echo, Req2);
maybe_echo(<<"POST">>, false, Req) ->
	cowboy_req:reply(400, [], <<"Missing body.">>, Req);
maybe_echo(_, _, Req) ->
	%% Method not allowed.
	cowboy_req:reply(405, Req).

echo(undefined, Req) ->
	cowboy_req:reply(400, [], <<"Missing echo parameter.">>, Req);
echo(Echo, Req) ->
	cowboy_req:reply(200,
		[{<<"content-encoding">>, <<"utf-8">>}], Echo, Req).

terminate(_Reason, _Req, _State) ->
	ok.