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Refactor NLAP XML parsing to a new Xerces-based tree parser with static DTD validation #202

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Refactor NLAP XML parsing to a new Xerces-based tree parser with static DTD validation #202

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fc4d112
Rewrite XML parser core and tests
Copilot Jul 25, 2026
65d43bd
Fix XML parser error classification and unit checks
Copilot Jul 25, 2026
342c35f
Harden XML parser against XXE during parse passes
Copilot Jul 25, 2026
2c854ef
Remove coroutine usage from XML parser implementation
Copilot Jul 25, 2026
d07c727
Reapply XML parser specs using C++23 std::generator
Copilot Jul 25, 2026
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1 change: 1 addition & 0 deletions lib/xml/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -31,5 +31,6 @@ install(
FILES
./xmlparser.hpp
./xmlconstants.hpp
./static-dtd.hpp
DESTINATION /usr/local/include
)
6 changes: 6 additions & 0 deletions lib/xml/static-dtd.hpp
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17 changes: 11 additions & 6 deletions lib/xml/xmlconstants.hpp
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Original file line number Diff line number Diff line change
@@ -1,20 +1,25 @@
#pragma once

#include <string>
#include <cstdint>
#include <string_view>

//- NLAP XML start marker: configurable tag used to identify message boundaries
static constexpr std::string_view NLAP_XML_START_MARKER("<NLAP>");

//- NLAP XML end marker: used to split stream data into individual NLAP messages
static const std::string NLAP_XML_END_MARKER("</NLAP>");
static constexpr std::string_view NLAP_XML_END_MARKER("</NLAP>");

//- XML declaration prepended to messages that do not already contain it
static const std::string NLAP_XML_DECLARATION("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
static constexpr std::string_view NLAP_XML_DECLARATION("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");

//- Path to the NLAP DTD used for validation (override at compile time via -DNLAP_DTD_PATH=...)
#ifndef NLAP_DTD_PATH
#define NLAP_DTD_PATH "specs/xml/nlap.dtd"
#endif

static const std::string NLAP_DTD_SYSTEM_PATH(NLAP_DTD_PATH);
static const std::string_view NLAP_DTD_SYSTEM_PATH(NLAP_DTD_PATH);

//- constant expressions (error)
constexpr uint16_t XML_ERROR_PARSE_BUFFER_EXCEEDED = 10;
constexpr uint16_t XML_ERROR_BAD_REQUEST = 400;
constexpr uint16_t XML_ERROR_INVALID_CONTENT_DTD = 10;
constexpr uint16_t XML_ERROR_INVALID_SYNTAX = 20;
constexpr uint16_t XML_ERROR_INVALID_FRAMING = 30;
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