Add cookie example

examples/cookie/src/toppage_handler.erl

@@ -0,0 +1,29 @@
+%% Feel free to use, reuse and abuse the code in this file.
+
+%% @doc Cookie handler.
+-module(toppage_handler).
+
+-export([init/3]).
+-export([handle/2]).
+-export([terminate/2]).
+
+init(_Transport, Req, []) ->
+	{ok, Req, undefined}.
+
+handle(Req, State) ->
+	NewValue = integer_to_list(random:uniform(1000000)),
+	Req2 = cowboy_req:set_resp_cookie(
+		<<"server">>, NewValue, [{path, <<"/">>}], Req),
+	{ClientCookie, Req3} = cowboy_req:cookie(<<"client">>, Req2),
+	{ServerCookie, Req4} = cowboy_req:cookie(<<"server">>, Req3),
+	{ok, Body} = toppage_dtl:render([
+		{client, ClientCookie},
+		{server, ServerCookie}
+	]),
+	{ok, Req5} = cowboy_req:reply(200,
+		[{<<"content-type">>, <<"text/html">>}],
+		Body, Req4),
+	{ok, Req5, State}.
+
+terminate(_Req, _State) ->
+	ok.