Implement cookies in cowboy_http_req

include/http.hrl

@@ -34,7 +34,7 @@
 	| 'Set-Cookie2' | 'X-Forwarded-For' | 'Cookie' | 'Keep-Alive'
 	| 'Proxy-Connection' | binary().
 -type http_headers() :: list({http_header(), binary()}).
-%% -type http_cookies() :: term(). %% @todo
+-type http_cookies() :: list({binary(), binary()}).
 -type http_status() :: non_neg_integer() | binary().
 
 -record(http_req, {
@@ -58,7 +58,7 @@
 	raw_qs     = undefined :: undefined | binary(),
 	bindings   = undefined :: undefined | cowboy_dispatcher:bindings(),
 	headers    = []        :: http_headers(),
-%%	cookies    = undefined :: undefined | http_cookies() %% @todo
+	cookies    = undefined :: undefined | http_cookies(),
 
 	%% Request body.
 	body_state = waiting   :: waiting | done,

src/cowboy_http_req.erl

@@ -27,8 +27,8 @@
 	path/1, path_info/1, raw_path/1,
 	qs_val/2, qs_val/3, qs_vals/1, raw_qs/1,
 	binding/2, binding/3, bindings/1,
-	header/2, header/3, headers/1
-%%	cookie/2, cookie/3, cookies/1 @todo
+	header/2, header/3, headers/1,
+	cookie/2, cookie/3, cookies/1
 ]). %% Request API.
 
 -export([
@@ -178,6 +178,43 @@ header(Name, Req, Default) when is_atom(Name) orelse is_binary(Name) ->
 headers(Req) ->
 	{Req#http_req.headers, Req}.
 
+%% @equiv cookie(Name, Req, undefined)
+-spec cookie(binary(), #http_req{})
+	-> {binary() | true | undefined, #http_req{}}.
+cookie(Name, Req) ->
+	cookie(Name, Req, undefined).
+
+%% @doc Return the cookie value for the given key, or a default if
+%% missing.
+-spec cookie(binary(), #http_req{}, Default)
+	-> {binary() | true | Default, #http_req{}} when Default::any().
+cookie(Name, Req=#http_req{cookies=undefined}, Default) ->
+	case header('Cookie', Req) of
+		{undefined, Req2} ->
+			{Default, Req2#http_req{cookies=[]}};
+		{RawCookie, Req2} ->
+			Cookies = cowboy_cookies:parse_cookie(RawCookie),
+			cookie(Name, Req2#http_req{cookies=Cookies}, Default)
+	end;
+cookie(Name, Req, Default) ->
+	case lists:keyfind(Name, 1, Req#http_req.cookies) of
+		{Name, Value} -> {Value, Req};
+		false -> {Default, Req}
+	end.
+
+%% @doc Return the full list of cookie values.
+-spec cookies(#http_req{}) -> {list({binary(), binary() | true}), #http_req{}}.
+cookies(Req=#http_req{cookies=undefined}) ->
+	case header('Cookie', Req) of
+		{undefined, Req2} ->
+			{[], Req2#http_req{cookies=[]}};
+		{RawCookie, Req2} ->
+			Cookies = cowboy_cookies:parse_cookie(RawCookie),
+			cookies(Req2#http_req{cookies=Cookies})
+	end;
+cookies(Req=#http_req{cookies=Cookies}) ->
+	{Cookies, Req}.
+
 %% Request Body API.
 
 %% @doc Return the full body sent with the request, or <em>{error, badarg}</em>