From 00294041cd3c6f66598a50b57abf27e6a35e277f Mon Sep 17 00:00:00 2001 From: Lars Thorsen Date: Thu, 12 Jan 2017 16:49:40 +0100 Subject: [xmerl] Correct bug handling multiple documents on a stream Change how to interpret end of document to comply with Tim Brays comment on the standard. This makes it possible to handle more than one doc on a stream, the standard makes it impossible to know when the document is ended without waiting for the next document (and not always even that). Tim Brays comment about the trailing "Misc" rule: The fact that you're allowed some trailing junk after the root element, I decided (but unfortunately too late) is a real design error in XML. If I'm writing a network client, I'm probably going to close the link as soon as a I see the root element end-tag, and not depend on the other end closing it down properly. Furthermore, if I want to send a succession of XML documents over a network link, if I find a processing instruction after a root element, is it a trailer on the previous document, or part of the prolog of the next? --- lib/xmerl/src/xmerl_sax_parser_base.erlsrc | 66 ++++++++++++++++++------------ 1 file changed, 40 insertions(+), 26 deletions(-) (limited to 'lib/xmerl/src/xmerl_sax_parser_base.erlsrc') diff --git a/lib/xmerl/src/xmerl_sax_parser_base.erlsrc b/lib/xmerl/src/xmerl_sax_parser_base.erlsrc index 4d75805b9b..3ef2fce4d3 100644 --- a/lib/xmerl/src/xmerl_sax_parser_base.erlsrc +++ b/lib/xmerl/src/xmerl_sax_parser_base.erlsrc @@ -1,7 +1,7 @@ %%-*-erlang-*- %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2008-2016. All Rights Reserved. +%% Copyright Ericsson AB 2008-2017. 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. @@ -72,7 +72,7 @@ parse(Xml, State) -> {ok, Rest, State2} -> State3 = event_callback(endDocument, State2), ets:delete(RefTable), - {ok, State3#xmerl_sax_parser_state.event_state, Rest}; + {ok, State3#xmerl_sax_parser_state.event_state, Rest}; {fatal_error, {State2, Reason}} -> State3 = event_callback(endDocument, State2), ets:delete(RefTable), @@ -81,6 +81,10 @@ parse(Xml, State) -> State3 = event_callback(endDocument, State2), ets:delete(RefTable), format_error(Tag, State3, Reason); + {endDocument, Rest, State2} -> + State3 = event_callback(endDocument, State2), + ets:delete(RefTable), + {ok, State3#xmerl_sax_parser_state.event_state, Rest}; Other -> _State2 = event_callback(endDocument, State1), ets:delete(RefTable), @@ -111,7 +115,7 @@ parse_dtd(Xml, State) -> {Rest, State2} when is_record(State2, xmerl_sax_parser_state) -> State3 = event_callback(endDocument, State2), ets:delete(RefTable), - {ok, State3#xmerl_sax_parser_state.event_state, Rest}; + {ok, State3#xmerl_sax_parser_state.event_state, Rest}; {endDocument, Rest, State2} when is_record(State2, xmerl_sax_parser_state) -> State3 = event_callback(endDocument, State2), ets:delete(RefTable), @@ -1024,16 +1028,21 @@ parse_etag(Bytes, State) -> unicode_incomplete_check([Bytes, State, fun parse_etag/2], undefined). - parse_etag_1(?STRING_REST(">", Rest), #xmerl_sax_parser_state{end_tags=[{_ETag, Uri, LocalName, QName, OldNsList, NewNsList} - |RestOfETags]} = State, _Tag) -> + |RestOfETags], + input_type=InputType} = State, _Tag) -> State1 = event_callback({endElement, Uri, LocalName, QName}, State), State2 = send_end_prefix_mapping_event(NewNsList, State1), - parse_content(Rest, - State2#xmerl_sax_parser_state{end_tags=RestOfETags, - ns = OldNsList}, - [], true); + case check_if_new_doc_allowed(InputType, RestOfETags) of + true -> + throw({endDocument, Rest, State2#xmerl_sax_parser_state{ns = OldNsList}}); + false -> + parse_content(Rest, + State2#xmerl_sax_parser_state{end_tags=RestOfETags, + ns = OldNsList}, + [], true) + end; parse_etag_1(?STRING_UNBOUND_REST(_C, _), State, Tag) -> {P,TN} = Tag, ?fatal_error(State, "Bad EndTag: " ++ P ++ ":" ++ TN); @@ -1051,21 +1060,26 @@ parse_etag_1(Bytes, State, Tag) -> %% Description: Parsing the content part of tags %% [43] content ::= (element | CharData | Reference | CDSect | PI | Comment)* %%---------------------------------------------------------------------- - parse_content(?STRING_EMPTY, State, Acc, IgnorableWS) -> - case catch cf(?STRING_EMPTY, State, Acc, IgnorableWS, fun parse_content/4) of - {Rest, State1} when is_record(State1, xmerl_sax_parser_state) -> - {Rest, State1}; - {fatal_error, {State1, Msg}} -> - case check_if_document_complete(State1, Msg) of - true -> - State2 = send_character_event(length(Acc), IgnorableWS, lists:reverse(Acc), State1), - {?STRING_EMPTY, State2}; - false -> - ?fatal_error(State1, Msg) - end; - Other -> - throw(Other) + case check_if_document_complete(State, "No more bytes") of + true -> + State1 = send_character_event(length(Acc), IgnorableWS, lists:reverse(Acc), State), + {?STRING_EMPTY, State1}; + false -> + case catch cf(?STRING_EMPTY, State, Acc, IgnorableWS, fun parse_content/4) of + {Rest, State1} when is_record(State1, xmerl_sax_parser_state) -> + {Rest, State1}; + {fatal_error, {State1, Msg}} -> + case check_if_document_complete(State1, Msg) of + true -> + State2 = send_character_event(length(Acc), IgnorableWS, lists:reverse(Acc), State1), + {?STRING_EMPTY, State2}; + false -> + ?fatal_error(State1, Msg) + end; + Other -> + throw(Other) + end end; parse_content(?STRING("\r") = Bytes, State, Acc, IgnorableWS) -> cf(Bytes, State, Acc, IgnorableWS, fun parse_content/4); @@ -1094,7 +1108,7 @@ parse_content(?STRING_REST(" parse_content(?STRING_REST(" case ET of [] -> - {Rest, State}; %%LATH : Skicka ignorable WS ??? + {Rest, State}; %% Skicka ignorable WS ??? _ -> State1 = send_character_event(length(Acc), IgnorableWS, lists:reverse(Acc), State), parse_cdata(Rest1, State1) @@ -1102,7 +1116,7 @@ parse_content(?STRING_REST(" case ET of [] -> - {Rest, State}; %%LATH : Skicka ignorable WS ??? + {Rest, State}; %% Skicka ignorable WS ??? _ -> State1 = send_character_event(length(Acc), IgnorableWS, lists:reverse(Acc), State), parse_stag(Rest1, State1) @@ -3290,7 +3304,7 @@ cf(Rest, #xmerl_sax_parser_state{continuation_fun = CFun, continuation_state = C catch throw:ErrorTerm -> ?fatal_error(State, ErrorTerm); - exit:Reason -> + exit:Reason -> ?fatal_error(State, {'EXIT', Reason}) end, case Result of -- cgit v1.2.3 From 760a3fa3c57fa2b56b44a9c25cbab4df0f71987e Mon Sep 17 00:00:00 2001 From: Lars Thorsen Date: Fri, 10 Feb 2017 12:51:25 +0100 Subject: [xmerl] Fix XML "well-formedness" bug i SAX parser Changed the XML Sax parser behaviour so it returns an error if there are something more in the file after the the matching document. If one using the xmerl_sax_parser:stream() a rest is allowed which then can be sent to a new call of xmerl_sax_parser:stream() to parse next document. This is done to be compliant with XML conformance tests. --- lib/xmerl/src/xmerl_sax_parser_base.erlsrc | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-) (limited to 'lib/xmerl/src/xmerl_sax_parser_base.erlsrc') diff --git a/lib/xmerl/src/xmerl_sax_parser_base.erlsrc b/lib/xmerl/src/xmerl_sax_parser_base.erlsrc index 3ef2fce4d3..39dd3bbff3 100644 --- a/lib/xmerl/src/xmerl_sax_parser_base.erlsrc +++ b/lib/xmerl/src/xmerl_sax_parser_base.erlsrc @@ -72,7 +72,12 @@ parse(Xml, State) -> {ok, Rest, State2} -> State3 = event_callback(endDocument, State2), ets:delete(RefTable), - {ok, State3#xmerl_sax_parser_state.event_state, Rest}; + case check_if_rest_ok(State3#xmerl_sax_parser_state.input_type, Rest) of + true -> + {ok, State3#xmerl_sax_parser_state.event_state, Rest}; + false -> + format_error(fatal_error, State3, "Input found after legal document") + end; {fatal_error, {State2, Reason}} -> State3 = event_callback(endDocument, State2), ets:delete(RefTable), @@ -446,6 +451,15 @@ check_if_new_doc_allowed(stream, []) -> check_if_new_doc_allowed(_, _) -> false. +check_if_rest_ok(file, []) -> + true; +check_if_rest_ok(file, <<>>) -> + true; +check_if_rest_ok(stream, _) -> + true; +check_if_rest_ok(_, _) -> + false. + %%---------------------------------------------------------------------- %% Function: parse_pi_1(Rest, State) -> Result %% Input: Rest = string() | binary() -- cgit v1.2.3 From 71ee7ed52d51d10a4c8c3b9e1de0a3a1df57a1b6 Mon Sep 17 00:00:00 2001 From: Lars Thorsen Date: Fri, 17 Feb 2017 08:01:18 +0100 Subject: [xmerl] Remove faulty throws --- lib/xmerl/src/xmerl_sax_parser_base.erlsrc | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'lib/xmerl/src/xmerl_sax_parser_base.erlsrc') diff --git a/lib/xmerl/src/xmerl_sax_parser_base.erlsrc b/lib/xmerl/src/xmerl_sax_parser_base.erlsrc index 39dd3bbff3..2b9b37b5f3 100644 --- a/lib/xmerl/src/xmerl_sax_parser_base.erlsrc +++ b/lib/xmerl/src/xmerl_sax_parser_base.erlsrc @@ -93,7 +93,7 @@ parse(Xml, State) -> Other -> _State2 = event_callback(endDocument, State1), ets:delete(RefTable), - throw(Other) + {fatal_error, Other} end. %%---------------------------------------------------------------------- @@ -128,7 +128,7 @@ parse_dtd(Xml, State) -> Other -> _State2 = event_callback(endDocument, State1), ets:delete(RefTable), - throw(Other) + {fatal_error, Other} end. -- cgit v1.2.3