%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2005-2012. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
-module(xmerl_uri).
-export([parse/1,resolve/2
% scan_abspath/1
]).
%%% Parse URI and return {Scheme,Path}
%%% Note that Scheme specific parsing/validation is not handled here!
resolve(_Root,_Rel) ->
ok.
%%% See "http://www.isi.edu/in-notes/iana/assignments/url-schemes" for a list of
%%% defined URL schemes and references to its sources.
parse(URI) ->
case parse_scheme(URI) of
{http,Cont} -> parse_http(Cont,http);
{https,Cont} -> parse_http(Cont,https);
{ftp,Cont} -> parse_ftp(Cont,ftp);
{sip,Cont} -> parse_sip(Cont,sip);
{sips,Cont} -> parse_sip(Cont,sips);
{sms,Cont} -> parse_sms(Cont,sms); % Note: From old draft
{error,Error} -> {error,Error};
{Scheme,Cont} -> {Scheme,Cont}
end.
%%% Parse the scheme.
parse_scheme(URI) ->
parse_scheme(URI,[]).
parse_scheme([H|URI],Acc) when $a=<H,H=<$z; $A=<H,H=<$Z ->
parse_scheme2(URI,[H|Acc]);
parse_scheme(_,_) ->
{error,no_scheme}.
parse_scheme2([H|URI],Acc)
when $a=<H,H=<$z; $A=<H,H=<$Z; $0=<H,H=<$9; H==$-;H==$+;H==$. ->
parse_scheme2(URI,[H|Acc]);
parse_scheme2([$:|URI],Acc) ->
{list_to_atom(lists:reverse(Acc)),URI};
parse_scheme2(_,_) ->
{error,no_scheme}.
%%% ............................................................................
-define(HTTP_DEFAULT_PORT, 80).
-define(HTTPS_DEFAULT_PORT, 443).
%%% HTTP (Source RFC 2396, RFC 2616)
%%% http_URL = "*" | absoluteURI | abs_path [ "?" query ] | authority
%%% http_URL = "http:" "//" host [ ":" port ] [ abs_path [ "?" query ]]
%%% Returns a tuple {http,Host,Port,Path,Query} where
%%% Host = string() Host value
%%% Port = string() Port value
%%% Path = string() Absolute path
%%% Query = string() Query or Fragment value
parse_http("//"++C0,Scheme) ->
case scan_hostport(C0,Scheme) of
{C1,Host,Port} ->
case scan_pathquery(C1) of
{error,Error} ->
{error,Error};
{Path,Query} ->
{Scheme,Host,Port,Path,Query}
end;
{error,Error} ->
{error,Error}
end;
parse_http(_,_) ->
{error,invalid_url}.
scan_pathquery(C0) ->
case scan_abspath(C0) of
{error,Error} ->
{error,Error};
{[],[]} -> % Add implicit path
{"/",""};
{"?"++C1,Path} ->
case scan_query(C1,[]) of
{error,Error} ->
{error,Error};
Query ->
{Path,"?"++Query}
end;
{"#"++C1,Path} -> % 'query' and 'fragment' are both defined as '*uric'
case scan_query(C1,[]) of
{error,Error} ->
{error,Error};
Fragment ->
{Path,"#"++Fragment}
end;
{[],Path} ->
{Path,""}
end.
%%% ............................................................................
-define(FTP_DEFAULT_PORT, 21).
%%% FTP (Source RFC 2396, RFC 1738, RFC 959)
%%% Encoded :, @, or / characters appearing within the username or
%%% password fields (as required by RFC 1738) are not handled.
%%%
%%% Note: This BNF has been modified to better fit with RFC 2396
%%% ftp_URL = "ftp:" "//" [ ftp_userinfo "@"] host [ ":" port ] ftp_abs_path
%%% ftp_userinfo = ftp_user [ ":" ftp_password ]
%%% ftp_abs_path = "/" ftp_path_segments [ ";type=" ftp_type ]
%%% ftp_path_segments = ftp_segment *( "/" ftp_segment)
%%% ftp_segment = *[ ftp_uchar | "?" | ":" | "@" | "&" | "=" ]
%%% ftp_type = "A" | "I" | "D" | "a" | "i" | "d"
%%% ftp_user = *[ ftp_uchar | ";" | "?" | "&" | "=" ]
%%% ftp_password = *[ ftp_uchar | ";" | "?" | "&" | "=" ]
%%% ftp_uchar = ftp_unreserved | escaped
%%% ftp_unreserved = alphanum | mark | "$" | "+" | ","
parse_ftp("//"++C0,Scheme) ->
case ftp_userinfo(C0) of
{error, Error} ->
{error,Error};
{C1,Creds} ->
case scan_hostport(C1,Scheme) of
{C2,Host,Port} ->
case scan_abspath(C2) of
{error,Error} ->
{error,Error};
{[],[]} -> % Add implicit path
{Scheme,Creds,Host,Port,"/"};
{[],Path} ->
{Scheme,Creds,Host,Port,Path}
end;
{error,Error} ->
{error,Error}
end
end.
ftp_userinfo(C0) ->
ftp_userinfo(C0, []).
ftp_userinfo([], Acc) ->
{lists:reverse(Acc), {"",""}};
ftp_userinfo(C0=[$/ |_], Acc) ->
{lists:reverse(Acc)++C0, {"",""}};
ftp_userinfo([$@ |C0], Acc) ->
{C0, ftp_userinfo_1(lists:reverse(Acc), 0, "", "")};
ftp_userinfo([C |C0], Acc) ->
ftp_userinfo(C0, [C |Acc]).
ftp_userinfo_1([], 0, Acc, []) ->
{ lists:reverse(Acc), ""};
ftp_userinfo_1([], 1, Acc, User) ->
{User, lists:reverse(Acc)};
ftp_userinfo_1([$:|_], 0, [], []) ->
{error,no_user};
ftp_userinfo_1([$:|C0], 0, Acc,[]) ->
ftp_userinfo_1(C0, 1, [], lists:reverse(Acc));
ftp_userinfo_1([C|C0],Stage, Acc, User) ->
ftp_userinfo_1(C0,Stage, [C|Acc], User).
%%% .........................................................................
-define(SIP_DEFAULT_PORT, 5060).
-define(SIPTLS_DEFAULT_PORT, 5061).
%%% SIP (Source RFC 2396, RFC 3261)
%%% sip_URL = "sip:" [ sip_userinfo "@" ] host [ ":" port ]
%%% sip_uri-parameters [ sip_headers ]
%%% sip_userinfo = (sip_user | sip_telephone-subscriber)
%%% [ ":" sip_password ]
%%% sip_user = *( unreserved | escaped |
%%% "&" | "=" | "+" | "$" | "," | ";" | "?" | "/")
%%% sip_telephone-subscriber = See RFC2806
%%% sip_password = *( unreserved | escaped |
%%% "&" | "=" | "+" | "$" | "," )
%%% sip_uri-parameters = *( ";" sip_uri-parameter )
%%% sip_uri-parameter = sip_transport-param | sip_user-param |
%%% sip_method-param | sip_ttl-param |
%%% sip_maddr-param | sip_lr-param | sip_other-param
%%% sip_transport-param = "transport=" ( "udp" | "tcp" | "sctp" | "tls" | token)
%%% sip_user-param = "user=" ( "phone" | "ip" | token)
%%% sip_method-param = "method=" sip_Method
%%% sip_ttl-param = "ttl=" sip_ttl
%%% sip_maddr-param = "maddr=" host
%%% sip_lr-param = "lr"
%%% sip_other-param = 1*sip_paramchar [ "=" 1*sip_paramchar ]
%%% sip_Method = "INVITE" | "ACK" | "OPTIONS" | "BYE" |
%%% "CANCEL" | "REGISTER" | token
%%% sip_ttl = 1*3DIGIT ; 0 to 255
%%% sip_paramchar = sip_param-unreserved | unreserved | escaped
%%% sip_param-unreserved = "[" | "]" | "/" | ":" | "&" | "+" | "$"
%%% sip_headers = "?" sip_header *( "&" sip_header )
%%% sip_header = sip_hname "=" sip_hvalue
%%% sip_hname = 1*( sip_hnv-unreserved | unreserved | escaped )
%%% sip_hvalue = *( sip_hnv-unreserved / unreserved / escaped )
%%% sip_hnv-unreserved = "[" | "]" | "/" | "?" | ":" | "+" | "$"
%%% Note:
%%% - FIXME: Headers not parsed
parse_sip(C0,Scheme) ->
case string:tokens(C0,"@") of
[Userinfo,Hostport] ->
{User,Pass}=sip_userinfo(Userinfo),
{C1,Host,Port}=scan_hostport(Hostport,Scheme),
{C2,Parameters}=scan_parameters(C1),
Headers=scan_headers(C2),
{Scheme,User,Pass,Host,Port,Parameters,Headers};
[Hostport] ->
{C1,Host,Port}=scan_hostport(Hostport,Scheme),
{C2,Parameters}=scan_parameters(C1),
Headers=scan_headers(C2),
{Scheme,none,none,Host,Port,Parameters,Headers}
end.
%%% FIXME! User can be telephone subscriber
sip_userinfo(Userinfo) ->
case string:tokens(Userinfo,":") of
[User,Pass] -> {User,Pass};
[User] -> {User,none}
end.
scan_parameters(C1) ->
ParList=string:tokens(C1,";"),
scan_parameters2(ParList,[], []).
%% Is Foo the way to go? This code needs further investigation. (As
%% does most of this module.) If we decide to keep it!
scan_parameters2([],Out, Foo) ->
{lists:reverse(Foo), lists:reverse(Out)};
scan_parameters2(["transport"++Val|Rest],Out, Foo) ->
scan_parameters2(Rest,[{transport,Val}|Out], Foo);
scan_parameters2(["user"++Val|Rest],Out, Foo) ->
scan_parameters2(Rest,[{user,Val}|Out], Foo);
scan_parameters2(["method"++Val|Rest],Out, Foo) ->
scan_parameters2(Rest,[{method,Val}|Out], Foo);
scan_parameters2(["ttl"++Val|Rest],Out, Foo) ->
scan_parameters2(Rest,[{ttl,Val}|Out], Foo);
scan_parameters2(["maddr"++Val|Rest],Out, Foo) ->
scan_parameters2(Rest,[{maddr,Val}|Out], Foo);
scan_parameters2(["lr"|Rest],Out, Foo) ->
scan_parameters2(Rest,[{lr,""}|Out], Foo);
scan_parameters2([Other|Rest],Out, Foo) ->
scan_parameters2(Rest,[Out], [Other |Foo]).
%%% FIXME!
scan_headers(C2) ->
C2.
%%% ............................................................................
%%% SMS (Source draft-wilde-sms-uri-01, January 24 2002 and
%%% draft-allocchio-gstn-01, November 2001)
%%% The syntax definition for "gstn-phone" is taken from
%%% [draft-allocchio-gstn-01], allowing global as well as local telephone
%%% numbers.
%%% Note: This BNF has been modified to better fit with RFC 2396
%%% sms_URI = sms ":" 1*( sms-recipient ) [ sms-body ]
%%% sms-recipient = gstn-phone sms-qualifier
%%% [ "," sms-recipient ]
%%% sms-qualifier = *( smsc-qualifier / pid-qualifier )
%%% smsc-qualifier = ";smsc=" SMSC-sub-addr
%%% pid-qualifier = ";pid=" PID-sub-addr
%%% sms-body = ";body=" *urlc
%%% gstn-phone = ( global-phone / local-phone )
%%% global-phone = "+" 1*( DIGIT / written-sep )
%%% local-phone = [ exit-code ] dial-number / exit-code [ dial-number ]
%%% exit-code = phone-string
%%% dial-number = phone-string
%%% subaddr-string = phone-string
%%% post-dial = phone-string
%%% phone-string = 1*( DTMF / pause / tonewait / written-sep )
%%% DTMF = ( DIGIT / "#" / "*" / "A" / "B" / "C" / "D" )
%%% written-sep = ( "-" / "." )
%%% pause = "p"
%%% tonewait = "w"
parse_sms(Cont,Scheme) ->
{Scheme,Cont}.
%%% ==========================================================================
%%% Generic URI parsing. BNF rules from RFC 2396
%%% hostport = host [ ":" port ]
scan_hostport(C0,Scheme) ->
case scan_host(C0) of
{error,Error} ->
{error,Error};
{":"++C1,Host} ->
{C2,Port}=scan_port(C1,[]),
{C2,Host,list_to_integer(Port)};
{C1,Host} when Scheme==http ->
{C1,Host,?HTTP_DEFAULT_PORT};
{C1,Host} when Scheme==https ->
{C1,Host,?HTTPS_DEFAULT_PORT};
{C1,Host} when Scheme==ftp ->
{C1,Host,?FTP_DEFAULT_PORT};
{C1,Host} when Scheme==sip ->
{C1,Host,?SIP_DEFAULT_PORT}
end.
%%% host = hostname | IPv4address | IPv6reference
%%% hostname = *( domainlabel "." ) toplabel [ "." ]
%%% domainlabel = alphanum | alphanum *( alphanum | "-" ) alphanum
%%% toplabel = alpha | alpha *( alphanum | "-" ) alphanum
%%% IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
%%% ipv6reference = "[" IPv6address "]"
%%% IPv6address = hexpart [ ":" IPv4address ]
%%% hexpart = hexseq | hexseq "::" [ hexseq ] | "::" [ hexseq ]
%%% hexseq = hex4 *( ":" hex4)
%%% hex4 = 1*4HEXDIG
%%% Note:
%%% Bitfields are set as follows:
%%% Bit 0 = 0-9
%%% Bit 1 = a-f
%%% Bit 2 = g-z
-define(BIT1, 1).
-define(BIT2, 2).
-define(BIT3, 4).
%%% 1 = DIGIT are only digits
%%% 3 = HEX are DIGITS + a-f
%%% 6 = ALPHA are HEX - DIGITS + g-z
-define(DIGIT, 1).
-define(HEX, 3).
-define(ALPHA, 6).
scan_host(C0) ->
case scan_host2(C0,[],0,[],[]) of
{C1,IPv4address,[?DIGIT,?DIGIT,?DIGIT,?DIGIT]} ->
{C1,lists:reverse(lists:append(IPv4address))};
%% {C1,IPv6address,[$[,Hex1,Hex2,Hex3,Hex4,$]]} when Hex1=<?HEX;
%% Hex2=<?HEX;
%% Hex3=<?HEX;
%% Hex4=<?HEX ->
%% {C1,lists:reverse(lists:append(IPv6address))};
{C1,Hostname,[_A|_HostF]} ->
{C1,lists:reverse(lists:append(Hostname))}
%% _ ->
%% {error,no_host}
end.
scan_host2([H|C0],Acc,CurF,Host,HostF) when $0=<H,H=<$9 ->
scan_host2(C0,[H|Acc],CurF bor ?BIT1,Host,HostF);
scan_host2([H|C0],Acc,CurF,Host,HostF) when $a=<H,H=<$z; $A=<H,H=<$Z ->
scan_host2(C0,[H|Acc],CurF bor ?ALPHA,Host,HostF);
scan_host2([$-|C0],Acc,CurF,Host,HostF) when CurF=/=0 ->
scan_host2(C0,[$-|Acc],CurF,Host,HostF);
scan_host2([$.|C0],Acc,CurF,Host,HostF) when CurF=/=0 ->
scan_host2(C0,[],0,[".",Acc|Host],[CurF|HostF]);
scan_host2(C0,Acc,CurF,Host,HostF) ->
{C0,[Acc|Host],[CurF|HostF]}.
%%% port = *digit
scan_port([H|C0],Acc) when $0=<H,H=<$9 ->
scan_port(C0,[H|Acc]);
scan_port(C0,Acc) ->
{C0,lists:reverse(Acc)}.
%%% abs_path = "/" path_segments
scan_abspath([]) ->
{[],[]};
scan_abspath("/"++C0) ->
scan_pathsegments(C0,["/"]);
scan_abspath(_) ->
{error,no_abspath}.
%%% path_segments = segment *( "/" segment )
scan_pathsegments(C0,Acc) ->
case scan_segment(C0,[]) of
{"/"++C1,Segment} ->
scan_pathsegments(C1,["/",Segment|Acc]);
{C1,Segment} ->
{C1,lists:reverse(lists:append([Segment|Acc]))}
end.
%%% segment = *pchar *( ";" param )
%%% param = *pchar
scan_segment(";"++C0,Acc) ->
{C1,ParamAcc}=scan_pchars(C0,";"++Acc),
scan_segment(C1,ParamAcc);
scan_segment(C0,Acc) ->
case scan_pchars(C0,Acc) of
{";"++C1,Segment} ->
{C2,ParamAcc}=scan_pchars(C1,";"++Segment),
scan_segment(C2,ParamAcc);
{C1,Segment} ->
{C1,Segment}
end.
%%% query = *uric
%%% uric = reserved | unreserved | escaped
%%% reserved = ";" | "/" | "?" | ":" | "@" | "&" | "=" | "+" |
%%% "$" | "," | "[" | "]"
%%% unreserved = alphanum | mark
%%% mark = "-" | "_" | "." | "!" | "~" | "*" | "'" |
%%% "(" | ")"
%%% escaped = "%" hex hex
scan_query([],Acc) ->
lists:reverse(Acc);
scan_query([$%,H1,H2|C0],Acc) -> % escaped
scan_query([hex2dec(H1)*16+hex2dec(H2)|C0],Acc);
scan_query([H|C0],Acc) when $a=<H,H=<$z;$A=<H,H=<$Z;$0=<H,H=<$9 -> % alphanum
scan_query(C0,[H|Acc]);
scan_query([H|C0],Acc) when H==$;; H==$/; H==$?; H==$:; H==$@; H==$[; H==$];
H==$&; H==$=; H==$+; H==$$; H==$, -> % reserved
scan_query(C0,[H|Acc]);
scan_query([H|C0],Acc) when H==$-; H==$_; H==$.; H==$!; H==$~;
H==$*; H==$'; H==$(; H==$) -> % mark
scan_query(C0,[H|Acc]);
scan_query([H|C0],Acc) when 0=<H,H=<127 -> % US ASCII
{H1,H2}=dec2hex(H),
scan_query(C0,[H2,H1,$%|Acc]);
scan_query([_H|_C0],_Acc) ->
{error,no_query}.
%%% pchar = unreserved | escaped |
%%% ":" | "@" | "&" | "=" | "+" | "$" | ","
scan_pchars([],Acc) ->
{[],Acc};
scan_pchars([$%,H1,H2|C0],Acc) -> % escaped
scan_pchars([hex2dec(H1)*16+hex2dec(H2)|C0],Acc);
scan_pchars([H|C0],Acc) when $a=<H,H=<$z;$A=<H,H=<$Z;$0=<H,H=<$9 -> % alphanum
scan_pchars(C0,[H|Acc]);
scan_pchars([H|C0],Acc) when H==$-; H==$_; H==$.; H==$!; H==$~;
H==$*; H==$'; H==$(; H==$) -> % mark
scan_pchars(C0,[H|Acc]);
scan_pchars([H|C0],Acc) when H==$:; H==$@; H==$&; H==$=; H==$+; H==$$; H==$, ->
scan_pchars(C0,[H|Acc]);
scan_pchars([H|C0],Acc) when 0=<H,H=<127, % US ASCII
H=/=$?,H=/=$;,H=/=$/,H=/=$# ->
{H1,H2}=dec2hex(H),
scan_pchars(C0,[H2,H1,$%|Acc]);
scan_pchars(C0,Acc) ->
{C0,Acc}.
hex2dec(X) when X>=$0,X=<$9 -> X-$0;
hex2dec(X) when X>=$A,X=<$F -> X-$A+10;
hex2dec(X) when X>=$a,X=<$f -> X-$a+10.
dec2hex(H) when H<256 ->
<<H1:4,H2:4>> = <<H>>,
{nibble2hex(H1),nibble2hex(H2)}.
nibble2hex(X) when 0=<X,X=<9 -> X+$0;
nibble2hex(10) -> $a;
nibble2hex(11) -> $b;
nibble2hex(12) -> $c;
nibble2hex(13) -> $d;
nibble2hex(14) -> $e;
nibble2hex(15) -> $f.
