%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2005-2011. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
%%
-module(http_util).
-export([
to_upper/1, to_lower/1,
convert_netscapecookie_date/1,
hexlist_to_integer/1, integer_to_hexlist/1,
convert_month/1,
is_hostname/1,
timestamp/0, timeout/2,
html_encode/1
]).
%%%=========================================================================
%%% Internal application API
%%%=========================================================================
to_upper(Str) ->
string:to_upper(Str).
to_lower(Str) ->
string:to_lower(Str).
%% Example: Mon, 09-Dec-2002 13:46:00 GMT
convert_netscapecookie_date([_D,_A,_Y, $,, $ ,
D1,D2, $-,
M,O,N, $-,
Y1,Y2,Y3,Y4, $ ,
H1,H2, $:,
M1,M2, $:,
S1,S2|_Rest]) ->
Year = list_to_integer([Y1,Y2,Y3,Y4]),
Day = list_to_integer([D1,D2]),
Month = convert_month([M,O,N]),
Hour = list_to_integer([H1,H2]),
Min = list_to_integer([M1,M2]),
Sec = list_to_integer([S1,S2]),
{{Year,Month,Day},{Hour,Min,Sec}};
convert_netscapecookie_date([_D,_A,_Y, $,, $ ,
D1,D2, $-,
M,O,N, $-,
Y3,Y4, $ ,
H1,H2, $:,
M1,M2, $:,
S1,S2|_Rest]) ->
{CurrentYear, _, _} = date(),
[Y1,Y2|_] = integer_to_list(CurrentYear),
Year = list_to_integer([Y1,Y2,Y3,Y4]),
Day = list_to_integer([D1,D2]),
Month = convert_month([M,O,N]),
Hour = list_to_integer([H1,H2]),
Min = list_to_integer([M1,M2]),
Sec = list_to_integer([S1,S2]),
{{Year,Month,Day},{Hour,Min,Sec}};
convert_netscapecookie_date([_D,_A,_Y, $ ,
D1,D2, $-,
M,O,N, $-,
Y1,Y2,Y3,Y4, $ ,
H1,H2, $:,
M1,M2, $:,
S1,S2|_Rest]) ->
Year = list_to_integer([Y1,Y2,Y3,Y4]),
Day = list_to_integer([D1,D2]),
Month = convert_month([M,O,N]),
Hour = list_to_integer([H1,H2]),
Min = list_to_integer([M1,M2]),
Sec = list_to_integer([S1,S2]),
{{Year,Month,Day},{Hour,Min,Sec}};
convert_netscapecookie_date([_D,_A,_Y, $ ,
D1,D2, $-,
M,O,N, $-,
Y3,Y4, $ ,
H1,H2, $:,
M1,M2, $:,
S1,S2|_Rest]) ->
{CurrentYear, _, _} = date(),
[Y1,Y2|_] = integer_to_list(CurrentYear),
Year = list_to_integer([Y1,Y2,Y3,Y4]),
Day = list_to_integer([D1,D2]),
Month = convert_month([M,O,N]),
Hour = list_to_integer([H1,H2]),
Min = list_to_integer([M1,M2]),
Sec = list_to_integer([S1,S2]),
{{Year,Month,Day},{Hour,Min,Sec}};
%% Sloppy...
convert_netscapecookie_date([_D,_A,_Y, $,, _SP,
D1,D2,_DA,
M,O,N,_DA,
Y1,Y2,Y3,Y4,_SP,
H1,H2,_Col,
M1,M2,_Col,
S1,S2|_Rest]) ->
Year=list_to_integer([Y1,Y2,Y3,Y4]),
Day=list_to_integer([D1,D2]),
Month=convert_month([M,O,N]),
Hour=list_to_integer([H1,H2]),
Min=list_to_integer([M1,M2]),
Sec=list_to_integer([S1,S2]),
{{Year,Month,Day},{Hour,Min,Sec}};
convert_netscapecookie_date([_D,_A,_Y, _SP,
D1,D2,_DA,
M,O,N,_DA,
Y1,Y2,Y3,Y4,_SP,
H1,H2,_Col,
M1,M2,_Col,
S1,S2|_Rest]) ->
Year=list_to_integer([Y1,Y2,Y3,Y4]),
Day=list_to_integer([D1,D2]),
Month=convert_month([M,O,N]),
Hour=list_to_integer([H1,H2]),
Min=list_to_integer([M1,M2]),
Sec=list_to_integer([S1,S2]),
{{Year,Month,Day},{Hour,Min,Sec}}.
hexlist_to_integer([]) ->
empty;
%%When the string only contains one value its eaasy done.
%% 0-9
hexlist_to_integer([Size]) when (Size >= 48) andalso (Size =< 57) ->
Size - 48;
%% A-F
hexlist_to_integer([Size]) when (Size >= 65) andalso (Size =< 70) ->
Size - 55;
%% a-f
hexlist_to_integer([Size]) when (Size >= 97) andalso (Size =< 102) ->
Size - 87;
hexlist_to_integer([_Size]) ->
not_a_num;
hexlist_to_integer(Size) ->
Len = string:span(Size, "1234567890abcdefABCDEF"),
hexlist_to_integer2(Size, 16 bsl (4 *(Len-2)),0).
integer_to_hexlist(Num)->
integer_to_hexlist(Num, get_size(Num), []).
convert_month("Jan") -> 1;
convert_month("Feb") -> 2;
convert_month("Mar") -> 3;
convert_month("Apr") -> 4;
convert_month("May") -> 5;
convert_month("Jun") -> 6;
convert_month("Jul") -> 7;
convert_month("Aug") -> 8;
convert_month("Sep") -> 9;
convert_month("Oct") -> 10;
convert_month("Nov") -> 11;
convert_month("Dec") -> 12.
is_hostname(Dest) ->
inet_parse:domain(Dest).
timestamp() ->
{A,B,C} = os:timestamp(),
A*1000000000+B*1000+(C div 1000).
timeout(Timeout, Started) ->
%% NewTimeout = Timeout - (timestamp() - Started),
case Timeout - (timestamp() - Started) of
NewTimeout when Timeout > 0 ->
NewTimeout;
_ ->
0
end.
html_encode(Chars) ->
Reserved = sets:from_list([$&, $<, $>, $\", $', $/]),
lists:append(lists:map(fun(Char) ->
char_to_html_entity(Char, Reserved)
end, Chars)).
%%%========================================================================
%%% Internal functions
%%%========================================================================
hexlist_to_integer2([],_Pos,Sum)->
Sum;
hexlist_to_integer2([HexVal | HexString], Pos, Sum)
when HexVal >= 48, HexVal =< 57 ->
hexlist_to_integer2(HexString, Pos bsr 4, Sum + ((HexVal-48) * Pos));
hexlist_to_integer2([HexVal | HexString], Pos, Sum)
when HexVal >= 65, HexVal =<70 ->
hexlist_to_integer2(HexString, Pos bsr 4, Sum + ((HexVal-55) * Pos));
hexlist_to_integer2([HexVal | HexString], Pos, Sum)
when HexVal>=97, HexVal=<102 ->
hexlist_to_integer2(HexString, Pos bsr 4, Sum + ((HexVal-87) * Pos));
hexlist_to_integer2(_AfterHexString, _Pos, Sum)->
Sum.
integer_to_hexlist(Num, Pot, Res) when Pot < 0 ->
convert_to_ascii([Num | Res]);
integer_to_hexlist(Num,Pot,Res) ->
Position = (16 bsl (Pot*4)),
PosVal = Num div Position,
integer_to_hexlist(Num - (PosVal*Position), Pot-1, [PosVal | Res]).
get_size(Num)->
get_size(Num, 0).
get_size(Num, Pot) when Num < (16 bsl(Pot *4)) ->
Pot-1;
get_size(Num, Pot) ->
get_size(Num, Pot+1).
convert_to_ascii(RevesedNum) ->
convert_to_ascii(RevesedNum, []).
convert_to_ascii([], Num)->
Num;
convert_to_ascii([Num | Reversed], Number)
when (Num > -1) andalso (Num < 10) ->
convert_to_ascii(Reversed, [Num + 48 | Number]);
convert_to_ascii([Num | Reversed], Number)
when (Num > 9) andalso (Num < 16) ->
convert_to_ascii(Reversed, [Num + 55 | Number]).
char_to_html_entity(Char, Reserved) ->
case sets:is_element(Char, Reserved) of
true ->
"&#" ++ integer_to_list(Char) ++ ";";
false ->
[Char]
end.
