diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/cowboy.app.src | 2 | ||||
| -rw-r--r-- | src/cowboy_clock.erl | 207 | ||||
| -rw-r--r-- | src/cowboy_http_req.erl | 6 | ||||
| -rw-r--r-- | src/cowboy_sup.erl | 4 |
4 files changed, 215 insertions, 4 deletions
diff --git a/src/cowboy.app.src b/src/cowboy.app.src index 1cfc361..6f4a67f 100644 --- a/src/cowboy.app.src +++ b/src/cowboy.app.src @@ -16,7 +16,7 @@ {description, "Small, fast, modular HTTP server."}, {vsn, "0.1.0"}, {modules, []}, - {registered, [cowboy_sup]}, + {registered, [cowboy_clock, cowboy_sup]}, {applications, [ kernel, stdlib diff --git a/src/cowboy_clock.erl b/src/cowboy_clock.erl new file mode 100644 index 0000000..0733741 --- /dev/null +++ b/src/cowboy_clock.erl @@ -0,0 +1,207 @@ +%% Copyright (c) 2011, Loïc Hoguin <[email protected]> +%% +%% 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(cowboy_clock). +-behaviour(gen_server). + +-export([start_link/0, stop/0, rfc1123/0]). %% API. +-export([init/1, handle_call/3, handle_cast/2, + handle_info/2, terminate/2, code_change/3]). %% gen_server. + +%% @todo Use calendar types whenever they get exported. +-type year() :: non_neg_integer(). +-type month() :: 1..12. +-type day() :: 1..31. +-type hour() :: 0..23. +-type minute() :: 0..59. +-type second() :: 0..59. +-type daynum() :: 1..7. + +-type date() :: {year(), month(), day()}. +-type time() :: {hour(), minute(), second()}. + +-type datetime() :: {date(), time()}. + +-record(state, { + universaltime = undefined :: undefined | datetime(), + rfc1123 = <<>> :: binary(), + tref = undefined :: undefined | timer:tref() +}). + +-define(SERVER, ?MODULE). +-define(TABLE, ?MODULE). + +-include_lib("eunit/include/eunit.hrl"). + +%% API. + +-spec start_link() -> {ok, Pid::pid()}. +start_link() -> + gen_server:start_link({local, ?SERVER}, ?MODULE, [], []). + +-spec stop() -> stopped. +stop() -> + gen_server:call(?SERVER, stop). + +-spec rfc1123() -> binary(). +rfc1123() -> + ets:lookup_element(?TABLE, rfc1123, 2). + +%% gen_server. + +init([]) -> + ?TABLE = ets:new(?TABLE, [set, protected, + named_table, {read_concurrency, true}]), + T = erlang:universaltime(), + B = update_rfc1123(undefined, T, <<>>), + {ok, TRef} = timer:send_interval(10, update), + ets:insert(?TABLE, {rfc1123, B}), + {ok, #state{universaltime=T, rfc1123=B, tref=TRef}}. + +handle_call(stop, _From, State=#state{tref=TRef}) -> + {ok, cancel} = timer:cancel(TRef), + {stop, normal, stopped, State}; + +handle_call(_Request, _From, State) -> + {reply, ignored, State}. + +handle_cast(_Msg, State) -> + {noreply, State}. + +handle_info(update, #state{universaltime=Prev, rfc1123=B1, tref=TRef}) -> + T = erlang:universaltime(), + B2 = update_rfc1123(Prev, T, B1), + ets:insert(?TABLE, {rfc1123, B2}), + {noreply, #state{universaltime=T, rfc1123=B2, tref=TRef}}; + +handle_info(_Info, State) -> + {noreply, State}. + +terminate(_Reason, _State) -> + ok. + +code_change(_OldVsn, State, _Extra) -> + {ok, State}. + +%% Internal. + +-spec update_rfc1123(Prev::undefined | datetime(), Now::datetime(), + Bin::binary()) -> binary(). +update_rfc1123(Now, Now, Bin) -> + Bin; +update_rfc1123({Date, {H, M, _}}, {Date, {H, M, S}}, + << Keep:23/binary, _/bits >>) -> + << Keep/binary, (pad_int(S))/binary, " GMT" >>; +update_rfc1123({Date, {H, _, _}}, {Date, {H, M, S}}, + << Keep:20/binary, _/bits >>) -> + << Keep/binary, (pad_int(M))/binary, $:, (pad_int(S))/binary, " GMT" >>; +update_rfc1123({Date, _}, {Date, {H, M, S}}, << Keep:17/binary, _/bits >>) -> + << Keep/binary, (pad_int(H))/binary, $:, (pad_int(M))/binary, + $:, (pad_int(S))/binary, " GMT" >>; +update_rfc1123({{Y, Mo, _}, _}, {Date = {Y, Mo, D}, {H, M, S}}, + << _:7/binary, Keep:10/binary, _/bits >>) -> + Wday = calendar:day_of_the_week(Date), + << (weekday(Wday))/binary, ", ", (pad_int(D))/binary, Keep/binary, + (pad_int(H))/binary, $:, (pad_int(M))/binary, + $:, (pad_int(S))/binary, " GMT" >>; +update_rfc1123({{Y, _, _}, _}, {Date = {Y, Mo, D}, {H, M, S}}, + << _:11/binary, Keep:6/binary, _/bits >>) -> + Wday = calendar:day_of_the_week(Date), + << (weekday(Wday))/binary, ", ", (pad_int(D))/binary, " ", + (month(Mo))/binary, Keep/binary, + (pad_int(H))/binary, $:, (pad_int(M))/binary, + $:, (pad_int(S))/binary, " GMT" >>; +update_rfc1123(_, {Date = {Y, Mo, D}, {H, M, 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(M))/binary, + $:, (pad_int(S))/binary, " GMT" >>. + +%% Following suggestion by MononcQc on #erlounge. +-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(daynum()) -> binary(). +weekday(1) -> <<"Mon">>; +weekday(2) -> <<"Tue">>; +weekday(3) -> <<"Wed">>; +weekday(4) -> <<"Thu">>; +weekday(5) -> <<"Fri">>; +weekday(6) -> <<"Sat">>; +weekday(7) -> <<"Sun">>. + +-spec month(month()) -> binary(). +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">>. + +%% Tests. + +-ifdef(TEST). + +update_rfc1123_test_() -> + Tests = [ + {<<"Sat, 14 May 2011 14:25:33 GMT">>, undefined, + {{2011, 5, 14}, {14, 25, 33}}, <<>>}, + {<<"Sat, 14 May 2011 14:25:33 GMT">>, {{2011, 5, 14}, {14, 25, 33}}, + {{2011, 5, 14}, {14, 25, 33}}, <<"Sat, 14 May 2011 14:25:33 GMT">>}, + {<<"Sat, 14 May 2011 14:25:34 GMT">>, {{2011, 5, 14}, {14, 25, 33}}, + {{2011, 5, 14}, {14, 25, 34}}, <<"Sat, 14 May 2011 14:25:33 GMT">>}, + {<<"Sat, 14 May 2011 14:26:00 GMT">>, {{2011, 5, 14}, {14, 25, 59}}, + {{2011, 5, 14}, {14, 26, 0}}, <<"Sat, 14 May 2011 14:25:59 GMT">>}, + {<<"Sat, 14 May 2011 15:00:00 GMT">>, {{2011, 5, 14}, {14, 59, 59}}, + {{2011, 5, 14}, {15, 0, 0}}, <<"Sat, 14 May 2011 14:59:59 GMT">>}, + {<<"Sun, 15 May 2011 00:00:00 GMT">>, {{2011, 5, 14}, {23, 59, 59}}, + {{2011, 5, 15}, { 0, 0, 0}}, <<"Sat, 14 May 2011 23:59:59 GMT">>}, + {<<"Wed, 01 Jun 2011 00:00:00 GMT">>, {{2011, 5, 31}, {23, 59, 59}}, + {{2011, 6, 1}, { 0, 0, 0}}, <<"Tue, 31 May 2011 23:59:59 GMT">>}, + {<<"Sun, 01 Jan 2012 00:00:00 GMT">>, {{2011, 5, 31}, {23, 59, 59}}, + {{2012, 1, 1}, { 0, 0, 0}}, <<"Sat, 31 Dec 2011 23:59:59 GMT">>} + ], + [{R, fun() -> R = update_rfc1123(P, N, B) end} || {R, P, N, B} <- Tests]. + +pad_int_test_() -> + Tests = [ + { 0, <<"00">>}, { 1, <<"01">>}, { 2, <<"02">>}, { 3, <<"03">>}, + { 4, <<"04">>}, { 5, <<"05">>}, { 6, <<"06">>}, { 7, <<"07">>}, + { 8, <<"08">>}, { 9, <<"09">>}, {10, <<"10">>}, {11, <<"11">>}, + {12, <<"12">>}, {13, <<"13">>}, {14, <<"14">>}, {15, <<"15">>}, + {16, <<"16">>}, {17, <<"17">>}, {18, <<"18">>}, {19, <<"19">>}, + {20, <<"20">>}, {21, <<"21">>}, {22, <<"22">>}, {23, <<"23">>}, + {24, <<"24">>}, {25, <<"25">>}, {26, <<"26">>}, {27, <<"27">>}, + {28, <<"28">>}, {29, <<"29">>}, {30, <<"30">>}, {31, <<"31">>}, + {32, <<"32">>}, {33, <<"33">>}, {34, <<"34">>}, {35, <<"35">>}, + {36, <<"36">>}, {37, <<"37">>}, {38, <<"38">>}, {39, <<"39">>}, + {40, <<"40">>}, {41, <<"41">>}, {42, <<"42">>}, {43, <<"43">>}, + {44, <<"44">>}, {45, <<"45">>}, {46, <<"46">>}, {47, <<"47">>}, + {48, <<"48">>}, {49, <<"49">>}, {50, <<"50">>}, {51, <<"51">>}, + {52, <<"52">>}, {53, <<"53">>}, {54, <<"54">>}, {55, <<"55">>}, + {56, <<"56">>}, {57, <<"57">>}, {58, <<"58">>}, {59, <<"59">>} + ], + [{I, fun() -> O = pad_int(I) end} || {I, O} <- Tests]. + +-endif. diff --git a/src/cowboy_http_req.erl b/src/cowboy_http_req.erl index 60f0b55..0956022 100644 --- a/src/cowboy_http_req.erl +++ b/src/cowboy_http_req.erl @@ -187,7 +187,8 @@ reply(Code, Headers, Body, Req=#http_req{socket=Socket, Head = response_head(Code, Headers, [ {<<"Connection">>, atom_to_connection(Connection)}, {<<"Content-Length">>, - list_to_binary(integer_to_list(iolist_size(Body)))} + list_to_binary(integer_to_list(iolist_size(Body)))}, + {<<"Date">>, cowboy_clock:rfc1123()} ]), Transport:send(Socket, [Head, Body]), {ok, Req#http_req{resp_state=done}}. @@ -198,7 +199,8 @@ chunked_reply(Code, Headers, Req=#http_req{socket=Socket, transport=Transport, resp_state=waiting}) -> Head = response_head(Code, Headers, [ {<<"Connection">>, <<"close">>}, - {<<"Transfer-Encoding">>, <<"chunked">>} + {<<"Transfer-Encoding">>, <<"chunked">>}, + {<<"Date">>, cowboy_clock:rfc1123()} ]), Transport:send(Socket, Head), {ok, Req#http_req{resp_state=chunks}}. diff --git a/src/cowboy_sup.erl b/src/cowboy_sup.erl index e12b3aa..278df54 100644 --- a/src/cowboy_sup.erl +++ b/src/cowboy_sup.erl @@ -30,4 +30,6 @@ start_link() -> -spec init([]) -> term(). %% @todo These specs should be improved. init([]) -> - {ok, {{one_for_one, 10, 10}, []}}. + Procs = [{cowboy_clock, {cowboy_clock, start_link, []}, + permanent, 5000, worker, dynamic}], + {ok, {{one_for_one, 10, 10}, Procs}}. |