diff options
Diffstat (limited to 'src/cow_http_hd.erl')
| -rw-r--r-- | src/cow_http_hd.erl | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/src/cow_http_hd.erl b/src/cow_http_hd.erl index 046b3e4..0728a47 100644 --- a/src/cow_http_hd.erl +++ b/src/cow_http_hd.erl @@ -22,6 +22,7 @@ -export([parse_content_length/1]). -export([parse_content_type/1]). -export([parse_expect/1]). +-export([parse_if_modified_since/1]). -export([parse_max_forwards/1]). -export([parse_transfer_encoding/1]). @@ -993,6 +994,20 @@ horse_parse_expect() -> ). -endif. +%% @doc Parse the If-Modified-Since header. + +-spec parse_if_modified_since(binary()) -> calendar:datetime(). +parse_if_modified_since(IfModifiedSince) -> + http_date(IfModifiedSince). + +-ifdef(TEST). +parse_if_modified_since_test_() -> + Tests = [ + {<<"Sat, 29 Oct 1994 19:43:31 GMT">>, {{1994, 10, 29}, {19, 43, 31}}} + ], + [{V, fun() -> R = parse_if_modified_since(V) end} || {V, R} <- Tests]. +-endif. + %% @doc Parse the Max-Forwards header. -spec parse_max_forwards(binary()) -> integer(). @@ -1137,3 +1152,198 @@ token_ci_list_sep(<<>>, Acc, T) -> lists:reverse([T|Acc]); token_ci_list_sep(<< $\s, R/bits >>, Acc, T) -> token_ci_list_sep(R, Acc, T); token_ci_list_sep(<< $\t, R/bits >>, Acc, T) -> token_ci_list_sep(R, Acc, T); token_ci_list_sep(<< $,, R/bits >>, Acc, T) -> token_ci_list(R, [T|Acc]). + +-define(DIGITS(A, B), ((A - $0) * 10 + (B - $0))). +-define(DIGITS(A, B, C, D), ((A - $0) * 1000 + (B - $0) * 100 + (C - $0) * 10 + (D - $0))). + +http_date(DateBin) -> + Date = {{_, _, D}, {H, M, S}} = all_date(DateBin), + true = D >= 0 andalso D =< 31, + true = H >= 0 andalso H =< 23, + true = M >= 0 andalso M =< 59, + true = S >= 0 andalso S =< 60, %% Leap second. + Date. + +all_date(<<"Mon, ", D1, D2, " ", R/bits >>) -> fixdate(R, ?DIGITS(D1, D2)); +all_date(<<"Tue, ", D1, D2, " ", R/bits >>) -> fixdate(R, ?DIGITS(D1, D2)); +all_date(<<"Wed, ", D1, D2, " ", R/bits >>) -> fixdate(R, ?DIGITS(D1, D2)); +all_date(<<"Thu, ", D1, D2, " ", R/bits >>) -> fixdate(R, ?DIGITS(D1, D2)); +all_date(<<"Fri, ", D1, D2, " ", R/bits >>) -> fixdate(R, ?DIGITS(D1, D2)); +all_date(<<"Sat, ", D1, D2, " ", R/bits >>) -> fixdate(R, ?DIGITS(D1, D2)); +all_date(<<"Sun, ", D1, D2, " ", R/bits >>) -> fixdate(R, ?DIGITS(D1, D2)); +all_date(<<"Monday, ", D1, D2, "-", R/bits >>) -> rfc850_date(R, ?DIGITS(D1, D2)); +all_date(<<"Tuesday, ", D1, D2, "-", R/bits >>) -> rfc850_date(R, ?DIGITS(D1, D2)); +all_date(<<"Wednesday, ", D1, D2, "-", R/bits >>) -> rfc850_date(R, ?DIGITS(D1, D2)); +all_date(<<"Thursday, ", D1, D2, "-", R/bits >>) -> rfc850_date(R, ?DIGITS(D1, D2)); +all_date(<<"Friday, ", D1, D2, "-", R/bits >>) -> rfc850_date(R, ?DIGITS(D1, D2)); +all_date(<<"Saturday, ", D1, D2, "-", R/bits >>) -> rfc850_date(R, ?DIGITS(D1, D2)); +all_date(<<"Sunday, ", D1, D2, "-", R/bits >>) -> rfc850_date(R, ?DIGITS(D1, D2)); +all_date(<<"Mon ", R/bits >>) -> asctime_date(R); +all_date(<<"Tue ", R/bits >>) -> asctime_date(R); +all_date(<<"Wed ", R/bits >>) -> asctime_date(R); +all_date(<<"Thu ", R/bits >>) -> asctime_date(R); +all_date(<<"Fri ", R/bits >>) -> asctime_date(R); +all_date(<<"Sat ", R/bits >>) -> asctime_date(R); +all_date(<<"Sun ", R/bits >>) -> asctime_date(R). + +fixdate(<<"Jan ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 1, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Feb ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 2, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Mar ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 3, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Apr ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 4, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"May ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 5, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Jun ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 6, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Jul ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 7, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Aug ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 8, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Sep ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 9, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Oct ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 10, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Nov ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 11, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +fixdate(<<"Dec ", Y1, Y2, Y3, Y4, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 12, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}. + +rfc850_date(<<"Jan-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 1, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Feb-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 2, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Mar-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 3, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Apr-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 4, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"May-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 5, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Jun-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 6, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Jul-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 7, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Aug-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 8, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Sep-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 9, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Oct-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 10, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Nov-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 11, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +rfc850_date(<<"Dec-", Y1, Y2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " GMT">>, Day) -> + {{rfc850_year(?DIGITS(Y1, Y2)), 12, Day}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}. + +rfc850_year(Y) when Y > 50 -> Y + 1900; +rfc850_year(Y) -> Y + 2000. + +asctime_date(<<"Jan ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 1, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Feb ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 2, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Mar ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 3, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Apr ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 4, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"May ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 5, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Jun ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 6, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Jul ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 7, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Aug ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 8, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Sep ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 9, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Oct ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 10, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Nov ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 11, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}; +asctime_date(<<"Dec ", D1, D2, " ", H1, H2, ":", M1, M2, ":", S1, S2, " ", Y1, Y2, Y3, Y4 >>) -> + {{?DIGITS(Y1, Y2, Y3, Y4), 12, asctime_day(D1, D2)}, {?DIGITS(H1, H2), ?DIGITS(M1, M2), ?DIGITS(S1, S2)}}. + +asctime_day($\s, D2) -> (D2 - $0); +asctime_day(D1, D2) -> (D1 - $0) * 10 + (D2 - $0). + +-ifdef(TEST). +day_name() -> oneof(["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"]). +day_name_l() -> oneof(["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]). +year() -> int(1951, 2050). +month() -> int(1, 12). +day() -> int(1, 31). +hour() -> int(23). +minute() -> int(59). +second() -> int(60). + +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". + +pad2(I) when I < 10 -> << $0, (I + $0) >>; +pad2(I) -> integer_to_binary(I). + +pad2s(I) when I < 10 -> << $\s, (I + $0) >>; +pad2s(I) -> integer_to_binary(I). + +fixdate_gen() -> + ?LET({DayName, Y, Mo, D, H, Mi, S}, + {day_name(), year(), month(), day(), hour(), minute(), second()}, + {{{Y, Mo, D}, {H, Mi, S}}, + list_to_binary([DayName, ", ", pad2(D), " ", month(Mo), " ", integer_to_binary(Y), + " ", pad2(H), ":", pad2(Mi), ":", pad2(S), " GMT"])}). + +rfc850_gen() -> + ?LET({DayName, Y, Mo, D, H, Mi, S}, + {day_name_l(), year(), month(), day(), hour(), minute(), second()}, + {{{Y, Mo, D}, {H, Mi, S}}, + list_to_binary([DayName, ", ", pad2(D), "-", month(Mo), "-", pad2(Y rem 100), + " ", pad2(H), ":", pad2(Mi), ":", pad2(S), " GMT"])}). + +asctime_gen() -> + ?LET({DayName, Y, Mo, D, H, Mi, S}, + {day_name(), year(), month(), day(), hour(), minute(), second()}, + {{{Y, Mo, D}, {H, Mi, S}}, + list_to_binary([DayName, " ", month(Mo), " ", pad2s(D), + " ", pad2(H), ":", pad2(Mi), ":", pad2(S), " ", integer_to_binary(Y)])}). + +prop_http_date() -> + ?FORALL({Date, DateBin}, + oneof([fixdate_gen(), rfc850_gen(), asctime_gen()]), + Date =:= http_date(DateBin)). + +http_date_test_() -> + Tests = [ + {<<"Sun, 06 Nov 1994 08:49:37 GMT">>, {{1994, 11, 6}, {8, 49, 37}}}, + {<<"Sunday, 06-Nov-94 08:49:37 GMT">>, {{1994, 11, 6}, {8, 49, 37}}}, + {<<"Sun Nov 6 08:49:37 1994">>, {{1994, 11, 6}, {8, 49, 37}}} + ], + [{V, fun() -> R = http_date(V) end} || {V, R} <- Tests]. +-endif. + +-ifdef(PERF). +horse_http_date_fixdate() -> + horse:repeat(200000, + http_date(<<"Sun, 06 Nov 1994 08:49:37 GMT">>) + ). + +horse_http_date_rfc850() -> + horse:repeat(200000, + http_date(<<"Sunday, 06-Nov-94 08:49:37 GMT">>) + ). + +horse_http_date_asctime() -> + horse:repeat(200000, + http_date(<<"Sun Nov 6 08:49:37 1994">>) + ). +-endif. |