%%%---------------------------------------------------------------------- %%% File : ejabberd_http.erl %%% Author : Alexey Shchepin %%% Purpose : %%% Created : 27 Feb 2004 by Alexey Shchepin %%% %%% %%% ejabberd, Copyright (C) 2002-2015 ProcessOne %%% %%% This program is free software; you can redistribute it and/or %%% modify it under the terms of the GNU General Public License as %%% published by the Free Software Foundation; either version 2 of the %%% License, or (at your option) any later version. %%% %%% This program is distributed in the hope that it will be useful, %%% but WITHOUT ANY WARRANTY; without even the implied warranty of %%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU %%% General Public License for more details. %%% %%% You should have received a copy of the GNU General Public License along %%% with this program; if not, write to the Free Software Foundation, Inc., %%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. %%% %%%---------------------------------------------------------------------- -module(ejabberd_http). -author('alexey@process-one.net'). %% External exports -export([start/2, start_link/2, become_controller/1, socket_type/0, receive_headers/1, url_encode/1, transform_listen_option/2]). %% Callbacks -export([init/2]). -include("ejabberd.hrl"). -include("logger.hrl"). -include("jlib.hrl"). -include("ejabberd_http.hrl"). -record(state, {sockmod, socket, request_method, request_version, request_path, request_auth, request_keepalive, request_content_length, request_lang = <<"en">>, %% XXX bard: request handlers are configured in %% ejabberd.cfg under the HTTP service. For example, %% to have the module test_web handle requests with %% paths starting with "/test/module": %% %% {5280, ejabberd_http, [http_poll, web_admin, %% {request_handlers, [{["test", "module"], mod_test_web}]}]} %% request_handlers = [], request_host, request_port, request_tp, request_headers = [], end_of_request = false, options = [], default_host, trail = <<>> }). -define(XHTML_DOCTYPE, <<"\n\n">>). -define(HTML_DOCTYPE, <<"\n" "">>). start(SockData, Opts) -> supervisor:start_child(ejabberd_http_sup, [SockData, Opts]). start_link(SockData, Opts) -> {ok, proc_lib:spawn_link(ejabberd_http, init, [SockData, Opts])}. init({SockMod, Socket}, Opts) -> TLSEnabled = proplists:get_bool(tls, Opts), TLSOpts1 = lists:filter(fun ({certfile, _}) -> true; (_) -> false end, Opts), TLSOpts2 = case proplists:get_bool(tls_compression, Opts) of false -> [compression_none | TLSOpts1]; true -> TLSOpts1 end, TLSOpts = [verify_none | TLSOpts2], {SockMod1, Socket1} = if TLSEnabled -> inet:setopts(Socket, [{recbuf, 8192}]), {ok, TLSSocket} = p1_tls:tcp_to_tls(Socket, TLSOpts), {p1_tls, TLSSocket}; true -> {SockMod, Socket} end, Captcha = case proplists:get_bool(captcha, Opts) of true -> [{[<<"captcha">>], ejabberd_captcha}]; false -> [] end, Register = case proplists:get_bool(register, Opts) of true -> [{[<<"register">>], mod_register_web}]; false -> [] end, Admin = case proplists:get_bool(web_admin, Opts) of true -> [{[<<"admin">>], ejabberd_web_admin}]; false -> [] end, Bind = case proplists:get_bool(http_bind, Opts) of true -> [{[<<"http-bind">>], mod_http_bind}]; false -> [] end, Poll = case proplists:get_bool(http_poll, Opts) of true -> [{[<<"http-poll">>], ejabberd_http_poll}]; false -> [] end, XMLRPC = case proplists:get_bool(xmlrpc, Opts) of true -> [{[], ejabberd_xmlrpc}]; false -> [] end, DefinedHandlers = gen_mod:get_opt( request_handlers, Opts, fun(Hs) -> [{str:tokens( iolist_to_binary(Path), <<"/">>), Mod} || {Path, Mod} <- Hs] end, []), RequestHandlers = DefinedHandlers ++ Captcha ++ Register ++ Admin ++ Bind ++ Poll ++ XMLRPC, ?DEBUG("S: ~p~n", [RequestHandlers]), DefaultHost = gen_mod:get_opt(default_host, Opts, fun(A) -> A end, undefined), ?INFO_MSG("started: ~p", [{SockMod1, Socket1}]), State = #state{sockmod = SockMod1, socket = Socket1, default_host = DefaultHost, options = Opts, request_handlers = RequestHandlers}, receive_headers(State). become_controller(_Pid) -> ok. socket_type() -> raw. send_text(State, Text) -> case catch (State#state.sockmod):send(State#state.socket, Text) of ok -> ok; {error, timeout} -> ?INFO_MSG("Timeout on ~p:send", [State#state.sockmod]), exit(normal); Error -> ?DEBUG("Error in ~p:send: ~p", [State#state.sockmod, Error]), exit(normal) end. receive_headers(#state{trail = Trail} = State) -> SockMod = State#state.sockmod, Socket = State#state.socket, Data = SockMod:recv(Socket, 0, 300000), case Data of {error, _} -> ok; {ok, D} -> parse_headers(State#state{trail = <>}) end. parse_headers(#state{trail = <<>>} = State) -> receive_headers(State); parse_headers(#state{request_method = Method, trail = Data} = State) -> PktType = case Method of undefined -> http_bin; _ -> httph_bin end, case erlang:decode_packet(PktType, Data, []) of {ok, Pkt, Rest} -> NewState = process_header(State#state{trail = Rest}, {ok, Pkt}), case NewState#state.end_of_request of true -> ok; _ -> parse_headers(NewState) end; {more, _} -> receive_headers(State#state{trail = Data}); _ -> ok end. process_header(State, Data) -> SockMod = State#state.sockmod, Socket = State#state.socket, case Data of {ok, {http_request, Method, Uri, Version}} -> KeepAlive = case Version of {1, 1} -> true; _ -> false end, Path = case Uri of {absoluteURI, _Scheme, _Host, _Port, P} -> {abs_path, P}; {abs_path, P} -> {abs_path, P}; _ -> Uri end, State#state{request_method = Method, request_version = Version, request_path = Path, request_keepalive = KeepAlive}; {ok, {http_header, _, 'Connection' = Name, _, Conn}} -> KeepAlive1 = case jlib:tolower(Conn) of <<"keep-alive">> -> true; <<"close">> -> false; _ -> State#state.request_keepalive end, State#state{request_keepalive = KeepAlive1, request_headers = add_header(Name, Conn, State)}; {ok, {http_header, _, 'Authorization' = Name, _, Auth}} -> State#state{request_auth = parse_auth(Auth), request_headers = add_header(Name, Auth, State)}; {ok, {http_header, _, 'Content-Length' = Name, _, SLen}} -> case catch jlib:binary_to_integer(SLen) of Len when is_integer(Len) -> State#state{request_content_length = Len, request_headers = add_header(Name, SLen, State)}; _ -> State end; {ok, {http_header, _, 'Accept-Language' = Name, _, Langs}} -> State#state{request_lang = parse_lang(Langs), request_headers = add_header(Name, Langs, State)}; {ok, {http_header, _, 'Host' = Name, _, Host}} -> State#state{request_host = Host, request_headers = add_header(Name, Host, State)}; {ok, {http_header, _, Name, _, Value}} when is_binary(Name) -> State#state{request_headers = add_header(normalize_header_name(Name), Value, State)}; {ok, {http_header, _, Name, _, Value}} -> State#state{request_headers = add_header(Name, Value, State)}; {ok, http_eoh} when State#state.request_host == undefined -> ?WARNING_MSG("An HTTP request without 'Host' HTTP " "header was received.", []), throw(http_request_no_host_header); {ok, http_eoh} -> ?DEBUG("(~w) http query: ~w ~p~n", [State#state.socket, State#state.request_method, element(2, State#state.request_path)]), {HostProvided, Port, TP} = get_transfer_protocol(SockMod, State#state.request_host), Host = get_host_really_served(State#state.default_host, HostProvided), State2 = State#state{request_host = Host, request_port = Port, request_tp = TP}, Out = process_request(State2), send_text(State2, Out), case State2#state.request_keepalive of true -> #state{sockmod = SockMod, socket = Socket, options = State#state.options, default_host = State#state.default_host, request_handlers = State#state.request_handlers}; _ -> #state{end_of_request = true, options = State#state.options, default_host = State#state.default_host, request_handlers = State#state.request_handlers} end; _ -> #state{end_of_request = true, options = State#state.options, default_host = State#state.default_host, request_handlers = State#state.request_handlers} end. add_header(Name, Value, State)-> [{Name, Value} | State#state.request_headers]. get_host_really_served(undefined, Provided) -> Provided; get_host_really_served(Default, Provided) -> case lists:member(Provided, ?MYHOSTS) of true -> Provided; false -> Default end. %% @spec (SockMod, HostPort) -> {Host::string(), Port::integer(), TP} %% where %% SockMod = gen_tcp | tls %% HostPort = string() %% TP = http | https %% @doc Given a socket and hostport header, return data of transfer protocol. %% Note that HostPort can be a string of a host like "example.org", %% or a string of a host and port like "example.org:5280". get_transfer_protocol(SockMod, HostPort) -> [Host | PortList] = str:tokens(HostPort, <<":">>), case {SockMod, PortList} of {gen_tcp, []} -> {Host, 80, http}; {gen_tcp, [Port]} -> {Host, jlib:binary_to_integer(Port), http}; {p1_tls, []} -> {Host, 443, https}; {p1_tls, [Port]} -> {Host, jlib:binary_to_integer(Port), https} end. %% XXX bard: search through request handlers looking for one that %% matches the requested URL path, and pass control to it. If none is %% found, answer with HTTP 404. process([], _, _, _, _) -> ejabberd_web:error(not_found); process(Handlers, Request, Socket, SockMod, Trail) -> {HandlerPathPrefix, HandlerModule, HandlerOpts, HandlersLeft} = case Handlers of [{Pfx, Mod} | Tail] -> {Pfx, Mod, [], Tail}; [{Pfx, Mod, Opts} | Tail] -> {Pfx, Mod, Opts, Tail} end, case (lists:prefix(HandlerPathPrefix, Request#request.path) or (HandlerPathPrefix==Request#request.path)) of true -> ?DEBUG("~p matches ~p", [Request#request.path, HandlerPathPrefix]), %% LocalPath is the path "local to the handler", i.e. if %% the handler was registered to handle "/test/" and the %% requested path is "/test/foo/bar", the local path is %% ["foo", "bar"] LocalPath = lists:nthtail(length(HandlerPathPrefix), Request#request.path), R = try HandlerModule:socket_handoff( LocalPath, Request, Socket, SockMod, Trail, HandlerOpts) catch error:undef -> HandlerModule:process(LocalPath, Request) end, ejabberd_hooks:run(http_request_debug, [{LocalPath, Request}]), R; false -> process(HandlersLeft, Request, Socket, SockMod, Trail) end. extract_path_query(#state{request_method = Method, request_path = {abs_path, Path}}) when Method =:= 'GET' orelse Method =:= 'HEAD' orelse Method =:= 'DELETE' orelse Method =:= 'OPTIONS' -> case catch url_decode_q_split(Path) of {'EXIT', _} -> false; {NPath, Query} -> LPath = normalize_path([NPE || NPE <- str:tokens(path_decode(NPath), <<"/">>)]), LQuery = case catch parse_urlencoded(Query) of {'EXIT', _Reason} -> []; LQ -> LQ end, {LPath, LQuery, <<"">>} end; extract_path_query(#state{request_method = Method, request_path = {abs_path, Path}, request_content_length = Len, sockmod = _SockMod, socket = _Socket} = State) when (Method =:= 'POST' orelse Method =:= 'PUT') andalso is_integer(Len) -> Data = recv_data(State, Len), ?DEBUG("client data: ~p~n", [Data]), case catch url_decode_q_split(Path) of {'EXIT', _} -> false; {NPath, _Query} -> LPath = normalize_path([NPE || NPE <- str:tokens(path_decode(NPath), <<"/">>)]), LQuery = case catch parse_urlencoded(Data) of {'EXIT', _Reason} -> []; LQ -> LQ end, {LPath, LQuery, Data} end; extract_path_query(_State) -> false. process_request(#state{request_method = Method, request_auth = Auth, request_lang = Lang, sockmod = SockMod, socket = Socket, options = Options, request_host = Host, request_port = Port, request_tp = TP, request_headers = RequestHeaders, request_handlers = RequestHandlers, trail = Trail} = State) -> case extract_path_query(State) of false -> make_bad_request(State); {LPath, LQuery, Data} -> {ok, IPHere} = case SockMod of gen_tcp -> inet:peername(Socket); _ -> SockMod:peername(Socket) end, XFF = proplists:get_value('X-Forwarded-For', RequestHeaders, []), IP = analyze_ip_xff(IPHere, XFF, Host), Request = #request{method = Method, path = LPath, q = LQuery, auth = Auth, data = Data, lang = Lang, host = Host, port = Port, tp = TP, opts = Options, headers = RequestHeaders, ip = IP}, case process(RequestHandlers, Request, Socket, SockMod, Trail) of El when is_record(El, xmlel) -> make_xhtml_output(State, 200, [], El); {Status, Headers, El} when is_record(El, xmlel) -> make_xhtml_output(State, Status, Headers, El); Output when is_binary(Output) or is_list(Output) -> make_text_output(State, 200, [], Output); {Status, Headers, Output} when is_binary(Output) or is_list(Output) -> make_text_output(State, Status, Headers, Output); {Status, Reason, Headers, Output} when is_binary(Output) or is_list(Output) -> make_text_output(State, Status, Reason, Headers, Output); _ -> none end end. make_bad_request(State) -> %% Support for X-Forwarded-From make_xhtml_output(State, 400, [], ejabberd_web:make_xhtml([#xmlel{name = <<"h1">>, attrs = [], children = [{xmlcdata, <<"400 Bad Request">>}]}])). analyze_ip_xff(IP, [], _Host) -> IP; analyze_ip_xff({IPLast, Port}, XFF, Host) -> [ClientIP | ProxiesIPs] = str:tokens(XFF, <<", ">>) ++ [jlib:ip_to_list(IPLast)], TrustedProxies = ejabberd_config:get_option( {trusted_proxies, Host}, fun(TPs) -> [iolist_to_binary(TP) || TP <- TPs] end, []), IPClient = case is_ipchain_trusted(ProxiesIPs, TrustedProxies) of true -> {ok, IPFirst} = inet_parse:address( binary_to_list(ClientIP)), ?DEBUG("The IP ~w was replaced with ~w due to " "header X-Forwarded-For: ~s", [IPLast, IPFirst, XFF]), IPFirst; false -> IPLast end, {IPClient, Port}. is_ipchain_trusted(_UserIPs, all) -> true; is_ipchain_trusted(UserIPs, TrustedIPs) -> [] == UserIPs -- [<<"127.0.0.1">> | TrustedIPs]. recv_data(State, Len) -> recv_data(State, Len, <<>>). recv_data(_State, 0, Acc) -> (iolist_to_binary(Acc)); recv_data(State, Len, Acc) -> case State#state.trail of <<>> -> case (State#state.sockmod):recv(State#state.socket, Len, 300000) of {ok, Data} -> recv_data(State, Len - byte_size(Data), <>); _ -> <<"">> end; _ -> Trail = (State#state.trail), recv_data(State#state{trail = <<>>}, Len - byte_size(Trail), <>) end. make_xhtml_output(State, Status, Headers, XHTML) -> Data = case lists:member(html, Headers) of true -> iolist_to_binary([?HTML_DOCTYPE, xml:element_to_binary(XHTML)]); _ -> iolist_to_binary([?XHTML_DOCTYPE, xml:element_to_binary(XHTML)]) end, Headers1 = case lists:keysearch(<<"Content-Type">>, 1, Headers) of {value, _} -> [{<<"Content-Length">>, iolist_to_binary(integer_to_list(byte_size(Data)))} | Headers]; _ -> [{<<"Content-Type">>, <<"text/html; charset=utf-8">>}, {<<"Content-Length">>, iolist_to_binary(integer_to_list(byte_size(Data)))} | Headers] end, HeadersOut = case {State#state.request_version, State#state.request_keepalive} of {{1, 1}, true} -> Headers1; {_, true} -> [{<<"Connection">>, <<"keep-alive">>} | Headers1]; {_, false} -> [{<<"Connection">>, <<"close">>} | Headers1] end, Version = case State#state.request_version of {1, 1} -> <<"HTTP/1.1 ">>; _ -> <<"HTTP/1.0 ">> end, H = lists:map(fun ({Attr, Val}) -> [Attr, <<": ">>, Val, <<"\r\n">>]; (_) -> [] end, HeadersOut), SL = [Version, iolist_to_binary(integer_to_list(Status)), <<" ">>, code_to_phrase(Status), <<"\r\n">>], Data2 = case State#state.request_method of 'HEAD' -> <<"">>; _ -> Data end, [SL, H, <<"\r\n">>, Data2]. make_text_output(State, Status, Headers, Text) -> make_text_output(State, Status, <<"">>, Headers, Text). make_text_output(State, Status, Reason, Headers, Text) -> Data = iolist_to_binary(Text), Headers1 = case lists:keysearch(<<"Content-Type">>, 1, Headers) of {value, _} -> [{<<"Content-Length">>, jlib:integer_to_binary(byte_size(Data))} | Headers]; _ -> [{<<"Content-Type">>, <<"text/html; charset=utf-8">>}, {<<"Content-Length">>, jlib:integer_to_binary(byte_size(Data))} | Headers] end, HeadersOut = case {State#state.request_version, State#state.request_keepalive} of {{1, 1}, true} -> Headers1; {_, true} -> [{<<"Connection">>, <<"keep-alive">>} | Headers1]; {_, false} -> [{<<"Connection">>, <<"close">>} | Headers1] end, Version = case State#state.request_version of {1, 1} -> <<"HTTP/1.1 ">>; _ -> <<"HTTP/1.0 ">> end, H = lists:map(fun ({Attr, Val}) -> [Attr, <<": ">>, Val, <<"\r\n">>] end, HeadersOut), NewReason = case Reason of <<"">> -> code_to_phrase(Status); _ -> Reason end, SL = [Version, jlib:integer_to_binary(Status), <<" ">>, NewReason, <<"\r\n">>], Data2 = case State#state.request_method of 'HEAD' -> <<"">>; _ -> Data end, [SL, H, <<"\r\n">>, Data2]. parse_lang(Langs) -> case str:tokens(Langs, <<",; ">>) of [First | _] -> First; [] -> <<"en">> end. % Code below is taken (with some modifications) from the yaws webserver, which % is distributed under the folowing license: % % This software (the yaws webserver) is free software. % Parts of this software is Copyright (c) Claes Wikstrom % Any use or misuse of the source code is hereby freely allowed. % % 1. Redistributions of source code must retain the above copyright % notice as well as this list of conditions. % % 2. Redistributions in binary form must reproduce the above copyright % notice as well as this list of conditions. %% @doc Split the URL and return {Path, QueryPart} url_decode_q_split(Path) -> url_decode_q_split(Path, <<>>). url_decode_q_split(<<$?, T/binary>>, Acc) -> %% Don't decode the query string here, that is parsed separately. {path_norm_reverse(Acc), T}; url_decode_q_split(<>, Acc) when H /= 0 -> url_decode_q_split(T, <>); url_decode_q_split(<<>>, Ack) -> {path_norm_reverse(Ack), <<>>}. %% @doc Decode a part of the URL and return string() path_decode(Path) -> path_decode(Path, <<>>). path_decode(<<$%, Hi, Lo, Tail/binary>>, Acc) -> Hex = hex_to_integer([Hi, Lo]), if Hex == 0 -> exit(badurl); true -> ok end, path_decode(Tail, <>); path_decode(<>, Acc) when H /= 0 -> path_decode(T, <>); path_decode(<<>>, Acc) -> Acc. path_norm_reverse(<<"/", T/binary>>) -> 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/binary>>) -> start_dir(N, Path, T); start_dir(N, Path, <<"./", T/binary>>) -> start_dir(N, Path, T); start_dir(N, Path, <<"../", T/binary>>) -> 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, <<$/, T/binary>>) -> start_dir(0, <<$/, Path/binary>>, T); rest_dir(N, Path, <<$/, T/binary>>) -> start_dir(N - 1, Path, T); rest_dir(0, Path, <>) -> rest_dir(0, <>, T); rest_dir(N, Path, <<_H, T/binary>>) -> rest_dir(N, Path, T). %% hex_to_integer hex_to_integer(Hex) -> case catch list_to_integer(Hex, 16) of {'EXIT', _} -> old_hex_to_integer(Hex); X -> X end. old_hex_to_integer(Hex) -> DEHEX = fun (H) when H >= $a, H =< $f -> H - $a + 10; (H) when H >= $A, H =< $F -> H - $A + 10; (H) when H >= $0, H =< $9 -> H - $0 end, lists:foldl(fun (E, Acc) -> Acc * 16 + DEHEX(E) end, 0, Hex). 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">>. parse_auth(<<"Basic ", Auth64/binary>>) -> Auth = jlib:decode_base64(Auth64), %% Auth should be a string with the format: user@server:password %% Note that password can contain additional characters '@' and ':' case str:chr(Auth, $:) of 0 -> undefined; Pos -> {User, <<$:, Pass/binary>>} = erlang:split_binary(Auth, Pos-1), {User, Pass} end; parse_auth(<<_/binary>>) -> undefined. parse_urlencoded(S) -> parse_urlencoded(S, nokey, <<>>, key). parse_urlencoded(<<$%, Hi, Lo, Tail/binary>>, Last, Cur, State) -> Hex = hex_to_integer([Hi, Lo]), parse_urlencoded(Tail, Last, <>, State); parse_urlencoded(<<$&, Tail/binary>>, _Last, Cur, key) -> [{Cur, <<"">>} | parse_urlencoded(Tail, nokey, <<>>, key)]; %% cont keymode parse_urlencoded(<<$&, Tail/binary>>, Last, Cur, value) -> V = {Last, Cur}, [V | parse_urlencoded(Tail, nokey, <<>>, key)]; parse_urlencoded(<<$+, Tail/binary>>, Last, Cur, State) -> parse_urlencoded(Tail, Last, <>, State); parse_urlencoded(<<$=, Tail/binary>>, _Last, Cur, key) -> parse_urlencoded(Tail, Cur, <<>>, value); %% change mode parse_urlencoded(<>, Last, Cur, State) -> parse_urlencoded(Tail, Last, <>, State); parse_urlencoded(<<>>, Last, Cur, _State) -> [{Last, Cur}]; parse_urlencoded(undefined, _, _, _) -> []. url_encode(A) -> url_encode(A, <<>>). url_encode(<>, Acc) when (H >= $a andalso H =< $z) orelse (H >= $A andalso H =< $Z) orelse (H >= $0 andalso H =< $9) orelse H == $_ orelse H == $. orelse H == $- orelse H == $/ orelse H == $: -> url_encode(T, <>); url_encode(<>, Acc) -> case integer_to_hex(H) of [X, Y] -> url_encode(T, <>); [X] -> url_encode(T, <>) end; url_encode(<<>>, Acc) -> Acc. integer_to_hex(I) -> case catch erlang:integer_to_list(I, 16) of {'EXIT', _} -> old_integer_to_hex(I); Int -> Int end. old_integer_to_hex(I) when I < 10 -> integer_to_list(I); old_integer_to_hex(I) when I < 16 -> [I - 10 + $A]; old_integer_to_hex(I) when I >= 16 -> N = trunc(I / 16), old_integer_to_hex(N) ++ old_integer_to_hex(I rem 16). % The following code is mostly taken from yaws_ssl.erl toupper(C) when C >= $a andalso C =< $z -> C - 32; toupper(C) -> C. tolower(C) when C >= $A andalso C =< $Z -> C + 32; tolower(C) -> C. normalize_header_name(Name) -> normalize_header_name(Name, [], true). normalize_header_name(<<"">>, Acc, _) -> iolist_to_binary(Acc); normalize_header_name(<<"-", Rest/binary>>, Acc, _) -> normalize_header_name(Rest, [Acc, "-"], true); normalize_header_name(<>, Acc, true) -> normalize_header_name(Rest, [Acc, toupper(C)], false); normalize_header_name(<>, Acc, false) -> normalize_header_name(Rest, [Acc, tolower(C)], false). normalize_path(Path) -> normalize_path(Path, []). normalize_path([], Norm) -> lists:reverse(Norm); normalize_path([<<"..">>|Path], Norm) -> normalize_path(Path, Norm); normalize_path([_Parent, <<"..">>|Path], Norm) -> normalize_path(Path, Norm); normalize_path([Part | Path], Norm) -> normalize_path(Path, [Part|Norm]). transform_listen_option(captcha, Opts) -> [{captcha, true}|Opts]; transform_listen_option(register, Opts) -> [{register, true}|Opts]; transform_listen_option(web_admin, Opts) -> [{web_admin, true}|Opts]; transform_listen_option(http_bind, Opts) -> [{http_bind, true}|Opts]; transform_listen_option(http_poll, Opts) -> [{http_poll, true}|Opts]; transform_listen_option({request_handlers, Hs}, Opts) -> Hs1 = lists:map( fun({PList, Mod}) when is_list(PList) -> Path = iolist_to_binary([[$/, P] || P <- PList]), {Path, Mod}; (Opt) -> Opt end, Hs), [{request_handlers, Hs1} | Opts]; transform_listen_option(Opt, Opts) -> [Opt|Opts].