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xmpp.chapril.org-ejabberd/src/xml.erl
Alexey Shchepin 5b4e116cfd * src/web/ejabberd_http.erl: Added separate version of
element_to_string for HTML encoding
* src/xml.erl: Reverted previous change

SVN Revision: 722
2007-02-04 16:04:40 +00:00

234 lines
5.3 KiB
Erlang

%%%----------------------------------------------------------------------
%%% File : xml.erl
%%% Author : Alexey Shchepin <alexey@sevcom.net>
%%% Purpose : XML utils
%%% Created : 20 Nov 2002 by Alexey Shchepin <alexey@sevcom.net>
%%% Id : $Id$
%%%----------------------------------------------------------------------
-module(xml).
-author('alexey@sevcom.net').
-vsn('$Revision$ ').
-export([element_to_string/1,
crypt/1,
remove_cdata/1,
get_cdata/1, get_tag_cdata/1,
get_attr/2, get_attr_s/2,
get_tag_attr/2, get_tag_attr_s/2,
get_subtag/2,
get_path_s/2,
replace_tag_attr/3]).
%element_to_string(El) ->
% case El of
% {xmlelement, Name, Attrs, Els} ->
% if length(Els) > 0 ->
% "<" ++ Name ++ attrs_to_string(Attrs) ++ ">" ++
% lists:append(
% lists:map(fun(E) -> element_to_string(E) end, Els))
% ++ "</" ++ Name ++ ">";
% true ->
% "<" ++ Name ++ attrs_to_string(Attrs) ++ "/>"
% end;
% {xmlcdata, CData} -> crypt(CData)
% end.
%
%
%attrs_to_string(Attrs) ->
% lists:append(lists:map(fun(A) -> attr_to_string(A) end, Attrs)).
%
%attr_to_string({Name, Value}) ->
% " " ++ crypt(Name) ++ "='" ++ crypt(Value) ++ "'".
%element_to_string2(El) ->
% lists:flatten(element_to_string21(El)).
%
%element_to_string21(El) ->
% case El of
% {xmlelement, Name, Attrs, Els} ->
% if length(Els) > 0 ->
% [[$< | Name], attrs_to_list(Attrs), ">",
% lists:map(fun(E) -> element_to_string21(E) end, Els),
% "</", Name, ">"];
% true ->
% ["<", Name, attrs_to_list(Attrs), "/>"]
% end;
% {xmlcdata, CData} -> crypt(CData)
% end.
%
%attrs_to_list(Attrs) ->
% lists:map(fun(A) -> attr_to_list(A) end, Attrs).
%
%attr_to_list({Name, Value}) ->
% [" ", crypt(Name), "='", crypt(Value), "'"].
element_to_string(El) ->
case El of
{xmlelement, Name, Attrs, Els} ->
if
Els /= [] ->
[$<, Name, attrs_to_list(Attrs), $>,
[element_to_string(E) || E <- Els],
$<, $/, Name, $>];
true ->
[$<, Name, attrs_to_list(Attrs), $/, $>]
end;
{xmlcdata, CData} ->
crypt(CData)
end.
attrs_to_list(Attrs) ->
[attr_to_list(A) || A <- Attrs].
attr_to_list({Name, Value}) ->
[$\s, crypt(Name), $=, $', crypt(Value), $'].
%crypt(S) ->
% lists:reverse(crypt(S, "")).
%
%crypt([$& | S], R) ->
% crypt(S, [$;, $p, $m, $a, $& | R]);
%crypt([$< | S], R) ->
% crypt(S, [$;, $t, $l, $& | R]);
%crypt([$> | S], R) ->
% crypt(S, [$;, $t, $g, $& | R]);
%crypt([$" | S], R) ->
% crypt(S, [$;, $t, $o, $u, $q, $& | R]);
%crypt([$' | S], R) ->
% crypt(S, [$;, $s, $o, $p, $a, $& | R]);
%crypt([C | S], R) ->
% crypt(S, [C | R]);
%crypt([], R) ->
% R.
crypt(S) when is_list(S) ->
[case C of
$& -> "&amp;";
$< -> "&lt;";
$> -> "&gt;";
$" -> "&quot;";
$' -> "&apos;";
_ -> C
end || C <- S];
crypt(S) when is_binary(S) ->
crypt(binary_to_list(S)).
%crypt1(S) ->
% lists:flatten([case C of
% $& -> "&amp;";
% $< -> "&lt;";
% $> -> "&gt;";
% $" -> "&quot;";
% $' -> "&apos;";
% _ -> C
% end || C <- S]).
%crypt([$& | S]) ->
% [$&, $a, $m, $p, $; | crypt(S)];
%crypt([$< | S]) ->
% [$&, $l, $t, $; | crypt(S)];
%crypt([$> | S]) ->
% [$&, $g, $t, $; | crypt(S)];
%crypt([$" | S]) ->
% [$&, $q, $u, $o, $t, $; | crypt(S)];
%crypt([$' | S]) ->
% [$&, $a, $p, $o, $s, $; | crypt(S)];
%crypt([C | S]) ->
% [C | crypt(S)];
%crypt([]) ->
% [].
remove_cdata_p({xmlelement, Name, Attrs, Els}) -> true;
remove_cdata_p(_) -> false.
remove_cdata(L) -> [E || E <- L, remove_cdata_p(E)].
%remove_cdata(L) ->
% lists:reverse(remove_cdata(L, [])).
%
%remove_cdata([{xmlelement, Name, Attrs, Els} | L], R) ->
% remove_cdata(L, [{xmlelement, Name, Attrs, Els} | R]);
%remove_cdata([{xmlcdata, CData} | L], R) ->
% remove_cdata(L, R);
%remove_cdata([], R) ->
% R.
get_cdata(L) ->
binary_to_list(list_to_binary(get_cdata(L, ""))).
get_cdata([{xmlcdata, CData} | L], S) ->
get_cdata(L, [S, CData]);
get_cdata([_ | L], S) ->
get_cdata(L, S);
get_cdata([], S) ->
S.
get_tag_cdata({xmlelement, Name, Attrs, Els}) ->
get_cdata(Els).
get_attr(AttrName, Attrs) ->
case lists:keysearch(AttrName, 1, Attrs) of
{value, {_, Val}} ->
{value, Val};
_ ->
false
end.
get_attr_s(AttrName, Attrs) ->
case lists:keysearch(AttrName, 1, Attrs) of
{value, {_, Val}} ->
Val;
_ ->
""
end.
get_tag_attr(AttrName, {xmlelement, Name, Attrs, Els}) ->
get_attr(AttrName, Attrs).
get_tag_attr_s(AttrName, {xmlelement, Name, Attrs, Els}) ->
get_attr_s(AttrName, Attrs).
get_subtag({xmlelement, _, _, Els}, Name) ->
get_subtag1(Els, Name).
get_subtag1([El | Els], Name) ->
case El of
{xmlelement, Name, _, _} ->
El;
_ ->
get_subtag1(Els, Name)
end;
get_subtag1([], _) ->
false.
get_path_s(El, []) ->
El;
get_path_s(El, [{elem, Name} | Path]) ->
case get_subtag(El, Name) of
false ->
"";
SubEl ->
get_path_s(SubEl, Path)
end;
get_path_s(El, [{attr, Name}]) ->
get_tag_attr_s(Name, El);
get_path_s(El, [cdata]) ->
get_tag_cdata(El).
replace_tag_attr(Attr, Value, {xmlelement, Name, Attrs, Els}) ->
Attrs1 = lists:keydelete(Attr, 1, Attrs),
Attrs2 = [{Attr, Value} | Attrs1],
{xmlelement, Name, Attrs2, Els}.