/
yaws_api.erl
1702 lines (1428 loc) · 47.4 KB
/
yaws_api.erl
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%%----------------------------------------------------------------------
%%% File : yaws_api.erl
%%% Author : Claes Wikstrom <klacke@hyber.org>
%%% Purpose :
%%% Created : 24 Jan 2002 by Claes Wikstrom <klacke@hyber.org>
%%%----------------------------------------------------------------------
-module(yaws_api).
-author('klacke@hyber.org').
%% -compile(export_all).
-include_lib("yaws/include/yaws.hrl").
-include_lib("yaws/include/yaws_api.hrl").
-include("yaws_debug.hrl").
-export([parse_query/1, parse_post/1, parse_multipart_post/1,
parse_multipart/2]).
-export([code_to_phrase/1, ssi/2, redirect/1]).
-export([setcookie/2, setcookie/3, setcookie/4, setcookie/5]).
-export([pre_ssi_files/2, pre_ssi_string/1, pre_ssi_string/2,
set_content_type/1,
htmlize/1, htmlize_char/1, f/2, fl/1]).
-export([find_cookie_val/2, secs/0,
url_decode/1, url_decode_q_split/1,
url_encode/1, parse_url/1, parse_url/2, format_url/1]).
-export([is_absolute_URI/1]).
-export([path_norm/1, path_norm_reverse/1]).
-export([get_line/1, mime_type/1]).
-export([stream_chunk_deliver/2, stream_chunk_deliver_blocking/2,
stream_chunk_end/1]).
-export([new_cookie_session/1,
cookieval_to_opaque/1, request_url/1,
print_cookie_sessions/0,
replace_cookie_session/2, delete_cookie_session/1]).
-export([getconf/0, setconf/2, set_status_code/1, reformat_header/1,
reformat_request/1, reformat_response/1, reformat_url/1]).
-export([set_trace/1,
set_tty_trace/1,
set_access_log/1]).
-export([call_cgi/2, call_cgi/3]).
-export([ehtml_expand/1, ehtml_expander/1, ehtml_apply/2,
ehtml_expander_test/0]).
-export([parse_set_cookie/1, format_set_cookie/1,
postvar/2, queryvar/2]).
-export([binding/1]).
-import(lists, [map/2, flatten/1, reverse/1]).
%% these are a bunch of function that are useful inside
%% yaws scripts
%% parse the command line query data
parse_query(Arg) ->
D = Arg#arg.querydata,
if
D == [] ->
[];
true ->
parse_post_data_urlencoded(D)
end.
%% parse url encoded POST data
parse_post(Arg) ->
D = Arg#arg.clidata,
Req = Arg#arg.req,
case Req#http_request.method of
'POST' ->
if
D == [] ->
[];
true ->
parse_post_data_urlencoded(D)
end;
Other ->
error_logger:error_msg("ERROR: Can't parse post body for ~p requests",
[Other]),
[]
end.
%
% Changed implementation of multipart form data. There is a new config
% parameter called
%
% partial_post_size
%
% which if set to an integer value
% will cause the content of the post content to be sent to the out/1
% function in chunks of this size.
%
% It is possible to get the server to maintain a state on behalf of the
% out/1 user by returning {get_more, Cont, State}.
%
%
% yaws_api:parse_multipart_post/1 will return either:
%
% {cont, Cont, Res} where Res is new result(s) from this segment. This
% indicates that there is more data to come and the out/1 function
% should return {get_more, Cont, User_state} where User_state might
% usefully be a File Descriptor.
%
% or {result, Res} if this is the last (or only) segment.
%
% Res is a list of {header, Header} | {part_body, Binary} | {body, Binary}
%
% Example usage could be:
%
% <erl>
%
% out(A) ->
% case yaws_api:parse_multipart_post(A) of
% {cont, Cont, Res} ->
% St = handle_res(A, Res),
% {get_more, Cont, St};
% {result, Res} ->
% handle_res(A, Res),
% {html, f("<pre>Done </pre>",[])}
% end.
%
% handle_res(A, [{head, Name}|T]) ->
% io:format("head:~p~n",[Name]),
% handle_res(A, T);
% handle_res(A, [{part_body, Data}|T]) ->
% io:format("part_body:~p~n",[Data]),
% handle_res(A, T);
% handle_res(A, [{body, Data}|T]) ->
% io:format("body:~p~n",[Data]),
% handle_res(A, T);
% handle_res(A, []) ->
% io:format("End_res~n").
%
% </erl>
parse_multipart_post(Arg) ->
H = Arg#arg.headers,
CT = H#headers.content_type,
Req = Arg#arg.req,
case Req#http_request.method of
'POST' ->
case CT of
undefined ->
error_logger:error_msg("Can't parse multipart if we "
"have no Content-Type header",[]),
[];
"multipart/form-data"++Line ->
case Arg#arg.cont of
{cont, Cont} ->
parse_multipart(
binary_to_list(un_partial(Arg#arg.clidata)),
{cont, Cont});
undefined ->
LineArgs = parse_arg_line(Line),
{value, {_, Boundary}} =
lists:keysearch(boundary, 1, LineArgs),
parse_multipart(
binary_to_list(un_partial(Arg#arg.clidata)),
Boundary)
end;
_Other ->
error_logger:error_msg("Can't parse multipart if we "
"find no multipart/form-data",[]),
[]
end;
Other ->
error_logger:error_msg("Can't parse multipart if get a ~p",
[Other]),
[]
end.
un_partial({partial, Bin}) ->
Bin;
un_partial(Bin) ->
Bin.
parse_arg_line(Line) ->
parse_arg_line(Line, []).
parse_arg_line([],Acc) -> Acc;
parse_arg_line([$ |Line], Acc) ->
parse_arg_line(Line, Acc);
parse_arg_line([$;|Line], Acc) ->
{KV,Rest} = parse_arg_key(Line, [], []),
parse_arg_line(Rest, [KV|Acc]).
%
parse_arg_key([], Key, Value) ->
make_parse_line_reply(Key, Value, []);
parse_arg_key([$;|Line], Key, Value) ->
make_parse_line_reply(Key, Value, [$;|Line]);
parse_arg_key([$ |Line], Key, Value) ->
parse_arg_key(Line, Key, Value);
parse_arg_key([$=|Line], Key, Value) ->
parse_arg_value(Line, Key, Value, false, false);
parse_arg_key([C|Line], Key, Value) ->
parse_arg_key(Line, [C|Key], Value).
%
% We need to deal with quotes and initial spaces here.
% parse_arg_value(String, Key, ValueAcc, InQuoteBool, InValueBool)
%
parse_arg_value([], Key, Value, _, _) ->
make_parse_line_reply(Key, Value, []);
parse_arg_value([$\\,$"|Line], Key, Value, Quote, Begun) ->
parse_arg_value(Line, Key, [$"|Value], Quote, Begun);
parse_arg_value([$"|Line], Key, Value, false, _) ->
parse_arg_value(Line, Key, Value, true, true);
parse_arg_value([$"|Line], Key, Value, true, _) ->
make_parse_line_reply(Key, Value, Line);
parse_arg_value([$;|Line], Key, Value, false, _) ->
make_parse_line_reply(Key, Value, [$;|Line]);
parse_arg_value([$ |Line], Key, Value, false, true) ->
make_parse_line_reply(Key, Value, Line);
parse_arg_value([$ |Line], Key, Value, false, false) ->
parse_arg_value(Line, Key, Value, false, false);
parse_arg_value([C|Line], Key, Value, Quote, _) ->
parse_arg_value(Line, Key, [C|Value], Quote, true).
%
make_parse_line_reply(Key, Value, Rest) ->
X = {{list_to_atom(yaws:funreverse(Key, {yaws, to_lowerchar})),
lists:reverse(Value)}, Rest},
X.
%
isolate_arg(Str) -> isolate_arg(Str, []).
isolate_arg([$:,$ |T], L) -> {yaws:funreverse(L, {yaws, to_lowerchar}), T};
isolate_arg([H|T], L) -> isolate_arg(T, [H|L]).
%
%% Stateful parser of multipart data - allows easy re-entry
% States are header|body|boundary|is_end
parse_multipart(Data, St) ->
case parse_multi(Data, St) of
{cont, St2, Res} ->
{cont, {cont, St2}, lists:reverse(Res)};
{result, Res} ->
{result, lists:reverse(Res)}
end.
% Re-entry
parse_multi(Data, {cont, {boundary, Start_data, PartBoundary, Acc, {Possible,Boundary}}}) ->
parse_multi(boundary, Start_data++Data, PartBoundary, Acc, [], {Possible++Data,Boundary});
parse_multi(Data, {cont, {State, Start_data, Boundary, Acc, Tmp}}) ->
parse_multi(State, Start_data++Data, Boundary, Acc, [], Tmp);
% Initial entry point
parse_multi(Data, Boundary) ->
B1 = "\r\n--"++Boundary,
D1 = "\r\n"++Data,
parse_multi(boundary, D1, B1, start, [], {D1, B1}).
parse_multi(header, "\r\n\r\n"++Body, Boundary, Acc, Res, Tmp) ->
Header = do_header(lists:reverse(Acc)),
parse_multi(body, Body, Boundary, [], [{head, Header}|Res], Tmp);
parse_multi(header, "\r\n"++Body, Boundary, [], Res, Tmp) ->
Header = do_header([]),
parse_multi(body, Body, Boundary, [], [{head, Header}|Res], Tmp);
parse_multi(header, "\r\n\r", Boundary, Acc, Res, Tmp) ->
{cont, {header, "\r\n\r", Boundary, Acc, Tmp}, Res};
parse_multi(header, "\r\n", Boundary, Acc, Res, Tmp) ->
{cont, {header, "\r\n", Boundary, Acc, Tmp}, Res};
parse_multi(header, "\r", Boundary, Acc, Res, Tmp) ->
{cont, {header, "\r", Boundary, Acc, Tmp}, Res};
parse_multi(header, [H|T], Boundary, Acc, Res, Tmp) ->
parse_multi(header, T, Boundary, [H|Acc], Res, Tmp);
parse_multi(header, [], Boundary, Acc, Res, Tmp) ->
{cont, {header, [], Boundary, Acc, Tmp}, Res};
parse_multi(body, [B|T], [B|T1], Acc, Res, _Tmp) ->
parse_multi(boundary, T, T1, Acc, Res, {[B|T], [B|T1]}); % store in case no match
parse_multi(body, [H|T], Boundary, Acc, Res, Tmp) ->
parse_multi(body, T, Boundary, [H|Acc], Res, Tmp);
parse_multi(body, [], Boundary, [], Res, Tmp) -> % would be empty partial body result
{cont, {body, [], Boundary, [], Tmp}, Res};
parse_multi(body, [], Boundary, Acc, Res, Tmp) -> % make a partial body result
{cont, {body, [], Boundary, [], Tmp}, [{part_body, lists:reverse(Acc)}|Res]};
parse_multi(boundary, [B|T], [B|T1], Acc, Res, Tmp) ->
parse_multi(boundary, T, T1, Acc, Res, Tmp);
parse_multi(boundary, [_H|_T], [_B|_T1], start, Res, {[D|T2], Bound}) -> % false alarm
parse_multi(body, T2, Bound, [D], Res, []);
parse_multi(boundary, [_H|_T], [_B|_T1], Acc, Res, {[D|T2], Bound}) -> % false alarm
parse_multi(body, T2, Bound, [D|Acc], Res, []);
parse_multi(boundary, [], [B|T1], Acc, Res, Tmp) -> % run out of body
{cont, {boundary, [], [B|T1], Acc, Tmp}, Res};
parse_multi(boundary, [], [], start, Res, {_, Bound}) ->
{cont, {is_end, [], Bound, [], []}, Res};
parse_multi(boundary, [], [], Acc, Res, {_, Bound}) ->
{cont, {is_end, [], Bound, [], []}, [{body, lists:reverse(Acc)}|Res]};
parse_multi(boundary, [H|T], [], start, Res, {_, Bound}) -> % matched whole boundary!
parse_multi(is_end, [H|T], Bound, [], Res, []);
parse_multi(boundary, [H|T], [], Acc, Res, {_, Bound}) -> % matched whole boundary!
parse_multi(is_end, [H|T], Bound, [], [{body, lists:reverse(Acc)}|Res], []);
parse_multi(is_end, "--"++_, _Boundary, _Acc, Res, _Tmp) ->
{result, Res};
parse_multi(is_end, "-", Boundary, Acc, Res, Tmp) ->
{cont, {is_end, "-", Boundary, Acc, Tmp}, Res};
parse_multi(is_end, "\r\n"++Next, Boundary, _Acc, Res, _Tmp) ->
parse_multi(header, Next, Boundary, [], Res, []);
parse_multi(is_end, "\r", Boundary, Acc, Res, Tmp) ->
{cont, {is_end, "\r", Boundary, Acc, Tmp}, Res}.
do_header([]) -> {[]};
do_header(Head) ->
{ok, Fields} = regexp:split(Head, "\r\n"),
MFields = merge_lines_822(Fields),
Header = lists:map(fun isolate_arg/1, MFields),
case lists:keysearch("content-disposition", 1, Header) of
{value, {_,"form-data"++Line}} ->
Parameters = parse_arg_line(Line),
{value, {_,Name}} = lists:keysearch(name, 1, Parameters),
{list_to_atom(Name), Parameters};
_ ->
{Header}
end.
merge_lines_822(Lines) ->
merge_lines_822(Lines, []).
merge_lines_822([], Acc) ->
lists:reverse(Acc);
merge_lines_822([Line=" "++_|Lines], []) ->
merge_lines_822(Lines, [Line]);
merge_lines_822([Line=" "++_|Lines], [Prev|Acc]) ->
merge_lines_822(Lines, [Prev++Line|Acc]);
merge_lines_822(["\t"++Line|Lines], [Prev|Acc]) ->
merge_lines_822(Lines, [Prev++[$ |Line]|Acc]);
merge_lines_822([Line|Lines], Acc) ->
merge_lines_822(Lines, [Line|Acc]).
%% parse POST data when ENCTYPE is unset or
%% Content-type: application/x-www-form-urlencoded
%% Bin is the content of ARG#arg.clidata
%% the alternative is
%% Content-type: multipart/form-data; boundary=-------------------7cd1d6371ec
%% which is used for file upload
parse_post_data_urlencoded(Bin) ->
parse_post_data_urlencoded(Bin, ['ALLSTRINGS']).
parse_post_data_urlencoded(Bin, Spec) ->
do_parse_spec(Bin, Spec, nokey, [], key).
%% Spec is a typelist of the types we expect
%% acceptable types are
%% int
%% float
%% string
%% ip
%% binary
%% checkbox
%% 'ALLSTRINGS'
%% special value ['ALLSTRINGS'] can be used in order to denote that
%% the remainder of the args are all strings
%% It will return a [{Key, Value}] list from the post data
%% with the same length as the Spec or EXIT
%% special value undefined is reserverd for non set fields
%% Key wil always be a regular atom.
do_parse_spec(<<$%, Hi:8, Lo:8, Tail/binary>>, Spec, Last, Cur, State) ->
Hex = yaws:hex_to_integer([Hi, Lo]),
do_parse_spec(Tail, Spec, Last, [ Hex | Cur], State);
do_parse_spec(<<$&, Tail/binary>>, Spec, _Last , Cur, key) ->
[{mkkey(Cur), undefined} |
do_parse_spec(Tail, Spec, nokey, [], key)]; %% cont keymode
do_parse_spec(<<$&, Tail/binary>>, Spec, Last, Cur, value) ->
[S|Ss] = tail_spec(Spec),
V = {Last, coerce_type(S, Cur)},
[V | do_parse_spec(Tail, Ss, nokey, [], key)];
do_parse_spec(<<$+, Tail/binary>>, Spec, Last, Cur, State) ->
do_parse_spec(Tail, Spec, Last, [$\s|Cur], State);
do_parse_spec(<<$=, Tail/binary>>, Spec, _Last, Cur, key) ->
do_parse_spec(Tail, Spec, mkkey(Cur), [], value); %% change mode
do_parse_spec(<<H:8, Tail/binary>>, Spec, Last, Cur, State) ->
do_parse_spec(Tail, Spec, Last, [H|Cur], State);
do_parse_spec(<<>>, Spec, Last, Cur, _State) ->
[S|_Ss] = tail_spec(Spec),
[{Last, coerce_type(S, Cur)}];
do_parse_spec(undefined,_,_,_,_) ->
[];
do_parse_spec(QueryList, Spec, Last, Cur, State) when list(QueryList) ->
do_parse_spec(list_to_binary(QueryList), Spec, Last, Cur, State).
tail_spec(['ALLSTRINGS']) ->
[string, 'ALLSTRINGS'];
tail_spec(L) ->
L.
coerce_type(_, []) ->
undefined;
coerce_type(int, Str) ->
list_to_integer(lists:reverse(Str));
coerce_type(float, Str) ->
list_to_float(lists:reverse(Str));
coerce_type(string, Str) ->
lists:reverse(Str);
coerce_type(checkbox, "no") ->
on;
coerce_type(checkbox, _Str) ->
off;
coerce_type(ip, _Str) ->
exit(nyi_ip);
coerce_type(binary, Str) ->
list_to_binary(lists:reverse(Str)).
mkkey(S) ->
list_to_atom(lists:reverse(S)).
code_to_phrase(100) -> "Continue";
code_to_phrase(101) -> "Switching Protocols ";
code_to_phrase(200) -> "OK";
code_to_phrase(201) -> "Created";
code_to_phrase(202) -> "Accepted";
code_to_phrase(203) -> "Non-Authoritative Information";
code_to_phrase(204) -> "No Content";
code_to_phrase(205) -> "Reset Content";
code_to_phrase(206) -> "Partial Content";
code_to_phrase(300) -> "Multiple Choices";
code_to_phrase(301) -> "Moved Permanently";
code_to_phrase(302) -> "Found";
code_to_phrase(303) -> "See Other";
code_to_phrase(304) -> "Not Modified";
code_to_phrase(305) -> "Use Proxy";
code_to_phrase(306) -> "(Unused)";
code_to_phrase(307) -> "Temporary Redirect";
code_to_phrase(400) -> "Bad Request";
code_to_phrase(401) -> "Unauthorized";
code_to_phrase(402) -> "Payment Required";
code_to_phrase(403) -> "Forbidden";
code_to_phrase(404) -> "Not Found";
code_to_phrase(405) -> "Method Not Allowed";
code_to_phrase(406) -> "Not Acceptable";
code_to_phrase(407) -> "Proxy Authentication Required";
code_to_phrase(408) -> "Request Timeout";
code_to_phrase(409) -> "Conflict";
code_to_phrase(410) -> "Gone";
code_to_phrase(411) -> "Length Required";
code_to_phrase(412) -> "Precondition Failed";
code_to_phrase(413) -> "Request Entity Too Large";
code_to_phrase(414) -> "Request-URI Too Long";
code_to_phrase(415) -> "Unsupported Media Type";
code_to_phrase(416) -> "Requested Range Not Satisfiable";
code_to_phrase(417) -> "Expectation Failed";
code_to_phrase(500) -> "Internal Server Error";
code_to_phrase(501) -> "Not Implemented";
code_to_phrase(502) -> "Bad Gateway";
code_to_phrase(503) -> "Service Unavailable";
code_to_phrase(504) -> "Gateway Timeout";
code_to_phrase(505) -> "HTTP Version Not Supported".
%%
%% server side include
%%
ssi(DocRoot, Files) ->
L = lists:map(fun(F) ->
case file:read_file([DocRoot ++ [$/|F]]) of
{ok, Bin} ->
Bin;
{error, Reason} ->
io_lib:format("Cannot include file ~p: ~p",
[F, Reason])
end
end, Files),
{html, L}.
%% include pre
pre_ssi_files(DocRoot, Files) ->
{html, L} = ssi(DocRoot, Files),
pre_ssi_string(L).
pre_ssi_string(Str) ->
pre_ssi_string(Str, "box").
pre_ssi_string(Str, Class) ->
{html, ["<br><br>\n<div class=\"", Class, "\"> <pre>\n",
htmlize_l(Str),
"\n</pre></div>\n<br>\n\n"]}.
%% convenience
f(Fmt, Args) ->
io_lib:format(Fmt, Args).
fl([Fmt, Arg | Tail]) ->
[f(Fmt, Arg) | fl(Tail)];
fl([]) ->
[].
%% htmlize
htmlize(<<Char, Tail/binary>>) ->
case htmlize_char(Char) of
Char ->
<<Char, (htmlize(Tail))/binary>>;
Bin ->
<<Bin/binary, (htmlize(Tail))/binary>>
end;
htmlize(<<>>) ->
<<>>;
htmlize(List) when list(List) ->
htmlize_l(List).
htmlize_char($>) ->
<<">">>;
htmlize_char($<) ->
<<"<">>;
htmlize_char($&) ->
<<"&">>;
htmlize_char(X) ->
X.
%% htmlize list (usually much more efficient than above)
htmlize_l(List) ->
htmlize_l(List, []).
htmlize_l([], Acc) -> lists:reverse(Acc);
htmlize_l([$>|Tail], Acc) ->
htmlize_l(Tail, [$;,$t,$g,$&|Acc]);
htmlize_l([$<|Tail], Acc) ->
htmlize_l(Tail, [$;,$t,$l,$&|Acc]);
htmlize_l([$&|Tail], Acc) ->
htmlize_l(Tail, [$;,$p,$m,$a,$&|Acc]);
htmlize_l([X|Tail], Acc) when integer(X) ->
htmlize_l(Tail, [X|Acc]);
htmlize_l([X|Tail], Acc) when binary(X) ->
X2 = htmlize_l(binary_to_list(X)),
htmlize_l(Tail, [X2|Acc]);
htmlize_l([X|Tail], Ack) when list(X) ->
X2 = htmlize_l(X),
htmlize_l(Tail, [X2|Ack]).
secs() ->
{MS, S, _} = now(),
(MS * 1000000) + S.
setcookie(Name, Value) ->
{header, {set_cookie, f("~s=~s;", [Name, Value])}}.
setcookie(Name, Value, Path) ->
{header, {set_cookie, f("~s=~s; path=~s", [Name, Value, Path])}}.
setcookie(Name, Value, Path, Expire) ->
setcookie(Name, Value, Path, Expire, [], []).
setcookie(Name, Value, Path, Expire, Domain) ->
setcookie(Name, Value, Path, Expire, Domain,[]).
setcookie(Name, Value, Path, Expire, Domain, _Secure) ->
SetDomain = if Domain == [] -> "";
true -> " Domain="++Domain++";"
end,
SetExpire = if Expire == [] -> "";
true -> " Expires="++Expire++";"
end,
SetPath = if Path == [] -> "/";
true -> Path
end,
{header, {set_cookie, f("~s=~s;~s~s Path=~s",
[Name,Value,SetDomain,SetExpire,SetPath])}}.
%% This function can be passed the cookie we get in the Arg#arg.headers.cookies
%% to search for a specific cookie
%% return [] if not found
%% Str if found
%% if serveral cookies with the same name are passed fron the browser,
%% only the first match is returned
find_cookie_val(_Cookie, []) ->
[];
find_cookie_val(Cookie, [FullCookie | FullCookieList]) ->
case find_cookie_val2(Cookie, FullCookie) of
[] ->
find_cookie_val(Cookie, FullCookieList);
Val ->
Val
end.
find_cookie_val2(Cookie, FullCookie) ->
case lists:prefix(Cookie, FullCookie) of
false when FullCookie == [] ->
[];
false ->
find_cookie_val2(Cookie, tl(FullCookie));
true ->
case lists:dropwhile(fun(X) -> X /= $= end, FullCookie) of
[] ->
[];
List ->
find_cookie_val3(tl(List),[])
end
end.
find_cookie_val3([], Ack) ->
lists:reverse(Ack);
find_cookie_val3([$;|_], Ack) ->
lists:reverse(Ack);
find_cookie_val3([H|T], Ack) ->
find_cookie_val3(T, [H|Ack]).
%% This one needs to deal with Microsoft style encoding.
%%
%% FIXME: This scheme is derived from what MSIE generates. I've
%% not tried to find the proper RFC.
%%
%% Does not unescape the query string - that has to wait until it is
%% parsed, otherwise we can unescape '&', '=', etc too early and make
%% it unparsable. -luke
url_decode([$%, $C, $2, $%, Hi, Lo | Tail]) ->
Hex = yaws:hex_to_integer([Hi, Lo]),
[Hex | url_decode(Tail)];
url_decode([$%, $C, $3, $%, Hi, Lo | Tail]) when Hi > $9 ->
Hex = yaws:hex_to_integer([Hi+4, Lo]),
[Hex | url_decode(Tail)];
url_decode([$%, $C, $3, $%, Hi, Lo | Tail]) when Hi < $A ->
Hex = yaws:hex_to_integer([Hi+4+7, Lo]),
[Hex | url_decode(Tail)];
url_decode([$%, Hi, Lo | Tail]) ->
Hex = yaws:hex_to_integer([Hi, Lo]),
[Hex | url_decode(Tail)];
url_decode([$?|T]) ->
%% Don't decode the query string here, that is parsed separately.
[$?|T];
url_decode([H|T]) ->
[H |url_decode(T)];
url_decode([]) ->
[].
path_norm(Path) ->
path_norm_reverse(lists:reverse(Path)).
path_norm_reverse("/" ++ T) -> start_dir(0, "/", T);
path_norm_reverse( T) -> start_dir(0, "", T).
start_dir(N, Path, ".." ) -> rest_dir(N, Path, "");
start_dir(N, Path, "/" ++ T ) -> start_dir(N , Path, T);
start_dir(N, Path, "./" ++ T ) -> start_dir(N , Path, T);
start_dir(N, Path, "../" ++ T ) -> start_dir(N + 1, Path, T);
start_dir(N, Path, T ) -> rest_dir (N , Path, T).
rest_dir (_N, Path, [] ) -> case Path of
[] -> "/";
_ -> Path
end;
rest_dir (0, Path, [ $/ | T ] ) -> start_dir(0 , [ $/ | Path ], T);
rest_dir (N, Path, [ $/ | T ] ) -> start_dir(N - 1, Path , T);
rest_dir (0, Path, [ H | T ] ) -> rest_dir (0 , [ H | Path ], T);
rest_dir (N, Path, [ _H | T ] ) -> rest_dir (N , Path , T).
%% url decode the path and return {Path, QueryPart}
url_decode_q_split(Path) ->
url_decode_q_split(Path, []).
url_decode_q_split([$%, $C, $2, $%, Hi, Lo | Tail], Ack) ->
Hex = yaws:hex_to_integer([Hi, Lo]),
url_decode_q_split(Tail, [Hex|Ack]);
url_decode_q_split([$%, $C, $3, $%, Hi, Lo | Tail], Ack) when Hi > $9 ->
Hex = yaws:hex_to_integer([Hi+4, Lo]),
url_decode_q_split(Tail, [Hex|Ack]);
url_decode_q_split([$%, $C, $3, $%, Hi, Lo | Tail], Ack) when Hi < $A ->
Hex = yaws:hex_to_integer([Hi+4+7, Lo]),
url_decode_q_split(Tail, [Hex|Ack]);
url_decode_q_split([$%, Hi, Lo | Tail], Ack) ->
Hex = yaws:hex_to_integer([Hi, Lo]),
url_decode_q_split(Tail, [Hex|Ack]);
url_decode_q_split([$?|T], Ack) ->
%% Don't decode the query string here, that is parsed separately.
{path_norm_reverse(Ack), T};
url_decode_q_split([H|T], Ack) ->
url_decode_q_split(T, [H|Ack]);
url_decode_q_split([], Ack) ->
{path_norm_reverse(Ack), []}.
url_encode([H|T]) ->
if
H >= $a, $z >= H ->
[H|url_encode(T)];
H >= $A, $Z >= H ->
[H|url_encode(T)];
H >= $0, $9 >= H ->
[H|url_encode(T)];
H == $_; H == $.; H == $-; H == $/; H == $: -> % FIXME: more..
[H|url_encode(T)];
true ->
case yaws:integer_to_hex(H) of
[X, Y] ->
[$%, X, Y | url_encode(T)];
[X] ->
[$%, $0, X | url_encode(T)]
end
end;
url_encode([]) ->
[].
redirect(Url) -> [{redirect, Url}].
is_nb_space(X) ->
lists:member(X, [$\s, $\t]).
% ret: {line, Line, Trail} | {lastline, Line, Trail}
get_line(L) ->
get_line(L, []).
get_line("\r\n\r\n" ++ Tail, Cur) ->
{lastline, lists:reverse(Cur), Tail};
get_line("\r\n" ++ Tail, Cur) ->
case is_nb_space(hd(Tail)) of
true -> %% multiline ... continue
get_line(Tail, [$\n, $\r | Cur]);
false ->
{line, lists:reverse(Cur), Tail}
end;
get_line([H|T], Cur) ->
get_line(T, [H|Cur]).
mime_type(FileName) ->
case filename:extension(FileName) of
[_|T] ->
element(2, mime_types:t(T));
[] ->
element(2, mime_types:t([]))
end.
%% Asynchronously delivery
stream_chunk_deliver(YawsPid, Data) ->
YawsPid ! {streamcontent, Data}.
%% Synchronous (on ultimate gen_tcp:send) delivery
%% Returns: ok | {error, Rsn}
stream_chunk_deliver_blocking(YawsPid, Data) ->
Ref = erlang:monitor(process, YawsPid),
YawsPid ! {streamcontent_with_ack, self(), Data},
receive
{YawsPid, streamcontent_ack} ->
erlang:demonitor(Ref),
%% flush incase a DOWN message was sent before the demonitor call
receive
{'DOWN', Ref, _, _, _} ->
ok
after 0 ->
ok
end;
{'DOWN', Ref, _, _, Info} ->
{error, {ypid_crash, Info}}
end.
stream_chunk_end(YawsPid) ->
YawsPid ! endofstreamcontent.
%% Return new cookie string
new_cookie_session(Opaque) ->
yaws_session_server:new_session(Opaque).
%% as returned in #ysession.cookie
cookieval_to_opaque(CookieVal) ->
yaws_session_server:cookieval_to_opaque(CookieVal).
print_cookie_sessions() ->
yaws_session_server:print_sessions().
replace_cookie_session(Cookie, NewOpaque) ->
yaws_session_server:replace_session(Cookie, NewOpaque).
delete_cookie_session(Cookie) ->
yaws_session_server:delete_session(Cookie).
%% to be used in embedded mode, make it possible
%% to pass a config to yaws from another data source
%% than /etc/yaws.conf, for example from a database
setconf(GC, Groups) when record(GC, gconf) ->
case is_groups(Groups) of
true ->
case gen_server:call(yaws_server, {setconf, GC, Groups}) of
ok ->
yaws_log:setdir(GC, Groups),
case GC#gconf.trace of
false ->
ok;
{true, What} ->
yaws_log:open_trace(What)
end;
E ->
E
end;
false ->
exit({badarg, {badgroups, Groups}})
end.
%% verify args to setconf
is_groups([H|T]) ->
case is_list_of_scs(H) of
true ->
is_groups(T);
false ->
false
end;
is_groups([]) ->
true.
is_list_of_scs([H|T]) when record(H, sconf) ->
is_list_of_scs(T);
is_list_of_scs([]) ->
true;
is_list_of_scs(_) ->
false.
%% return {ok, GC, Groups}.
getconf() ->
gen_server:call(yaws_server, getconf).
lmap(F, [H|T]) ->
[lists:map(F, H) | lmap(F, T)];
lmap(_, []) ->
[].
%% interactively turn on|off tracing
set_trace(Val) ->
Str = yaws_ctl:actl_trace(Val),
io:format("~s", [Str]).
set_access_log(Bool) ->
{ok, GC, Groups} = getconf(),
Groups2 = lmap(fun(SC) ->
SC#sconf{access_log = Bool}
end, Groups),
setconf(GC, Groups2).
%% interactively turn on|off tracing to the tty (as well)
%% typically useful in embedded mode
set_tty_trace(Bool) ->
gen_server:call(yaws_log, {trace_tty, Bool}).
set_status_code(Code) ->
{status, Code}.
%% returns [ Header1, Header2 .....]
reformat_header(H) ->
lists:zf(fun({Hname, Str}) ->
I = lists:flatten(io_lib:format("~s: ~s",[Hname, Str])),
{true, I};
(undefined) ->
false
end,
[
if H#headers.connection == undefined ->
undefined;
true ->
{"Connection", H#headers.connection}
end,
if H#headers.accept == undefined ->
undefined;
true ->
{"Accept", H#headers.accept}
end,
if H#headers.host == undefined ->
undefined;
true ->
{"Host", H#headers.host}
end,
if H#headers.if_modified_since == undefined ->
undefined;
true ->
{"If-Modified-Since", H#headers.if_modified_since}
end,
if H#headers.if_match == undefined ->
undefined;
true ->
{"If-Match", H#headers.if_match}
end,
if H#headers.if_none_match == undefined ->
undefined;
true ->
{"If-None-Match", H#headers.if_none_match}
end,
if H#headers.if_range == undefined ->
undefined;
true ->
{"If-Range", H#headers.if_range}
end,
if H#headers.if_unmodified_since == undefined ->
undefined;
true ->
{"If-Unmodified-Since", H#headers.if_unmodified_since}
end,
if H#headers.range == undefined ->
undefined;
true ->
{"Range", H#headers.range}
end,
if H#headers.referer == undefined ->
undefined;
true ->
{"Referer", H#headers.referer}
end,
if H#headers.user_agent == undefined ->
undefined;
true ->
{"User-Agent", H#headers.user_agent}
end,
if H#headers.accept_ranges == undefined ->
undefined;
true ->
{"Accept-Ranges", H#headers.accept_ranges}