XML::LibXML string parsing mishandles declared encodings

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Avaliação

Dificuldade
4/5
Tempo estimado
3-5 dias
Facilidade para iniciantes
48/100
Tipo de issue
Bug
Clareza
Razoavelmente clara
Status de atividade
Ativa
Stack de tecnologia
java, perl, xml
Domínio
backend

Direção de pesquisa

Start with src/main/java/org/perlonjava/runtime/perlmodule/XMLLibXML.java, especially xmlInputSource(), and trace how string inputs reach the XML parser. Use the reported failures in t/02gateway.t and the fixtures with ISO-8859-1 declarations as evidence; verify declared-encoding strings, decoded character strings, and BOM-marked byte strings against system Perl behavior.

Escrita pelo modelo de indexação a partir do texto da issue.

Descrição

area:parser area:unicode bug

Summary

PerlOnJava's bundled XML::LibXML returns incorrect character data when parsing the PagSeguro XML fixtures used by Business::CPI::Gateway::PagSeguro 0.904. The upstream distribution passes all 17 tests under system Perl, but fails 3 assertions under PerlOnJava in t/02gateway.t.

Reproduction evidence

CPAN random tester run 20261106-154847-45334:

  • t/02gateway.t failures: notification for completed transaction, notification for failed transaction, and it parses the file correctly.
  • Notification payer name: PerlOnJava returns Jo\uFFFDo da Silva; expected UTF-8 bytes for João da Silva.
  • Transaction payer name: PerlOnJava returns José Comprador; expected José Comprador, matching the system Perl result for the fixture's declared encoding.
  • System Perl oracle: all 17 tests pass, including t/02gateway.t.

The fixtures declare encoding="ISO-8859-1" while containing UTF-8 byte sequences for the accented names. The parser implementation in src/main/java/org/perlonjava/runtime/perlmodule/XMLLibXML.java sends most string inputs to a StringReader in xmlInputSource(). That character-based path bypasses XML byte decoding according to the declaration. The transaction mismatch directly reflects this; the replacement character in notification parsing also points to byte/character conversion on that path and should be covered while fixing it.

Expected behavior

Match system XML::LibXML behavior for string input carrying an XML encoding declaration, including these upstream cases. Preserve correct behavior for already-decoded character strings and BOM-marked byte strings.

Context

The target distribution is pure Perl and uses XML::LibXML; the failing implementation is PerlOnJava's bundled Java provider. No distribution source or tests were modified during classification.

Linguagem predominante
Perl
Estrelas
65
Forks
8
Merge médio
5h 57min
PRs com merge (30d)
177

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