From e19a6da3f7ca8e26978f95b81ab2e0f60981380a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= <essen@ninenines.eu>
Date: Wed, 23 Oct 2013 11:12:15 +0200
Subject: Add cookie parsing and building code

---
 src/cow_date.erl | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 src/cow_date.erl

(limited to 'src/cow_date.erl')

diff --git a/src/cow_date.erl b/src/cow_date.erl
new file mode 100644
index 0000000..3c5309c
--- /dev/null
+++ b/src/cow_date.erl
@@ -0,0 +1,67 @@
+%% Copyright (c) 2013, Loïc Hoguin <essen@ninenines.eu>
+%%
+%% Permission to use, copy, modify, and/or distribute this software for any
+%% purpose with or without fee is hereby granted, provided that the above
+%% copyright notice and this permission notice appear in all copies.
+%%
+%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+-module(cow_date).
+
+-export([rfc2109/1]).
+
+%% @doc Return the date formatted according to RFC2109.
+
+-spec rfc2109(calendar:datetime()) -> binary().
+rfc2109({Date = {Y, Mo, D}, {H, Mi, S}}) ->
+	Wday = calendar:day_of_the_week(Date),
+	<< (weekday(Wday))/binary, ", ", (pad_int(D))/binary, "-",
+		(month(Mo))/binary, "-", (list_to_binary(integer_to_list(Y)))/binary,
+		" ", (pad_int(H))/binary, $:, (pad_int(Mi))/binary,
+		$:, (pad_int(S))/binary, " GMT" >>.
+
+-ifdef(TEST).
+rfc2109_test_() ->
+	Tests = [
+		{<<"Sat, 14-May-2011 14:25:33 GMT">>, {{2011, 5, 14}, {14, 25, 33}}},
+		{<<"Sun, 01-Jan-2012 00:00:00 GMT">>, {{2012, 1,  1}, { 0,  0,  0}}}
+	],
+	[{R, fun() -> R = rfc2109(D) end} || {R, D} <- Tests].
+-endif.
+
+%% Internal.
+
+-spec pad_int(0..59) -> binary().
+pad_int(X) when X < 10 ->
+	<< $0, ($0 + X) >>;
+pad_int(X) ->
+	list_to_binary(integer_to_list(X)).
+
+-spec weekday(1..7) -> <<_:24>>.
+weekday(1) -> <<"Mon">>;
+weekday(2) -> <<"Tue">>;
+weekday(3) -> <<"Wed">>;
+weekday(4) -> <<"Thu">>;
+weekday(5) -> <<"Fri">>;
+weekday(6) -> <<"Sat">>;
+weekday(7) -> <<"Sun">>.
+
+-spec month(1..12) -> <<_:24>>.
+month( 1) -> <<"Jan">>;
+month( 2) -> <<"Feb">>;
+month( 3) -> <<"Mar">>;
+month( 4) -> <<"Apr">>;
+month( 5) -> <<"May">>;
+month( 6) -> <<"Jun">>;
+month( 7) -> <<"Jul">>;
+month( 8) -> <<"Aug">>;
+month( 9) -> <<"Sep">>;
+month(10) -> <<"Oct">>;
+month(11) -> <<"Nov">>;
+month(12) -> <<"Dec">>.
-- 
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