aboutsummaryrefslogtreecommitdiffstats
path: root/src/cow_http_hd.erl
diff options
context:
space:
mode:
Diffstat (limited to 'src/cow_http_hd.erl')
-rw-r--r--src/cow_http_hd.erl38
1 files changed, 38 insertions, 0 deletions
diff --git a/src/cow_http_hd.erl b/src/cow_http_hd.erl
index f761b6a..b844de4 100644
--- a/src/cow_http_hd.erl
+++ b/src/cow_http_hd.erl
@@ -24,6 +24,7 @@
-export([parse_date/1]).
-export([parse_etag/1]).
-export([parse_expect/1]).
+-export([parse_expires/1]).
-export([parse_if_match/1]).
-export([parse_if_modified_since/1]).
-export([parse_if_none_match/1]).
@@ -1079,6 +1080,43 @@ horse_parse_expect() ->
).
-endif.
+%% @doc Parse the Expires header.
+%%
+%% Recipients must interpret invalid date formats as a date
+%% in the past. The value "0" is commonly used.
+
+-spec parse_expires(binary()) -> calendar:datetime().
+parse_expires(<<"0">>) ->
+ {{1, 1, 1}, {0, 0, 0}};
+parse_expires(Expires) ->
+ try
+ cow_date:parse_date(Expires)
+ catch _:_ ->
+ {{1, 1, 1}, {0, 0, 0}}
+ end.
+
+-ifdef(TEST).
+parse_expires_test_() ->
+ Tests = [
+ {<<"0">>, {{1, 1, 1}, {0, 0, 0}}},
+ {<<"Thu, 01 Dec 1994 nope invalid">>, {{1, 1, 1}, {0, 0, 0}}},
+ {<<"Thu, 01 Dec 1994 16:00:00 GMT">>, {{1994, 12, 1}, {16, 0, 0}}}
+ ],
+ [{V, fun() -> R = parse_expires(V) end} || {V, R} <- Tests].
+-endif.
+
+-ifdef(PERF).
+horse_parse_expires_0() ->
+ horse:repeat(200000,
+ parse_expires(<<"0">>)
+ ).
+
+horse_parse_expires_invalid() ->
+ horse:repeat(200000,
+ parse_expires(<<"Thu, 01 Dec 1994 nope invalid">>)
+ ).
+-endif.
+
%% @doc Parse the If-Match header.
-spec parse_if_match(binary()) -> '*' | [etag()].