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Fix: consolidate born-digital PDF detection between archive decision and OCR (#13409)
* Fix: unify born-digital PDF detection between archive decision and OCR should_produce_archive() and RasterisedDocumentParser.parse() each reimplemented the "does this PDF have real text" check independently, using different normalization of pdftotext output. Raw pdftotext output can be non-empty (whitespace/form-feed layout padding) even when there is no real content, so the two checks could disagree: consumer.py treated a tagged-but-textless PDF as born-digital and skipped the archive, while the parser's own (stricter, normalized) check found no text and ran OCR anyway, leaving the document with no archive despite real OCR text (GH #13387). Both call sites now share one predicate, pdf_born_digital_text() in paperless/parsers/utils.py, so they can no longer drift apart. * Fix: restore extract_text seam for born-digital detection in parse() parse() had switched to calling pdf_born_digital_text() directly for its initial text/born-digital check, bypassing the parser's own extract_text instance method. That broke test mockability (tests patch tesseract_parser.extract_text to control the born-digital decision) and caused CI failures with mismatched OCR call counts and text. Split pdf_born_digital_text() into is_born_digital_text(text, path, log) - a pure decision function - and a thin pdf_born_digital_text() wrapper for callers without text in hand (consumer.should_produce_archive). parse() now extracts via self.extract_text(None, document_path) and passes the result to is_born_digital_text(), restoring the seam with no change to production behavior. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> * Cleanup: simplify born-digital detection, close #13387 test gap Simplification pass over the born-digital detection consolidation: - is_born_digital_text(): drop the has_text temp for an early return. - consumer.py: standardize the archive-decision log lines on plain hyphens (was a mix of em-dash and hyphen) and hoist the duplicated text_length computation. - Parametrize TestPdfBornDigitalText instead of four near-identical tests. Code review follow-up: the existing tests only ever exercised pdf_born_digital_text() through mocks, so the actual #13387 scenario (a tagged PDF whose only "text" is layout padding) was never checked against real pdftotext/pikepdf output - a regression in the normalize-before-decide logic itself would have gone undetected. Moved tagged_no_text_pdf_file from parsers/conftest.py up to the shared paperless/tests/conftest.py (it was previously only visible to tests under parsers/) and added a non-mocked regression test against the real sample file. Also fixed two stale comments in test_consumer.py referencing a _extract_text_for_archive_check helper that no longer exists. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com> --------- Co-authored-by: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Trenton H
co-authored by
Claude Sonnet 5
Claude Sonnet 5
parent
668fa77428
commit
350684cd6b
@@ -1329,7 +1329,7 @@ class PreConsumeTestCase(DirectoriesMixin, GetConsumerMixin, TestCase):
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with self.get_consumer(self.test_file) as c:
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c.run()
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# Verify no pre-consume script subprocess was invoked
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# (run_subprocess may still be called by _extract_text_for_archive_check)
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# (run_subprocess may still be called by pdf_born_digital_text via pdftotext)
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script_calls = [
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call
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for call in m.call_args_list
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@@ -1354,7 +1354,7 @@ class PreConsumeTestCase(DirectoriesMixin, GetConsumerMixin, TestCase):
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self.assertTrue(m.called)
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# Find the call that invoked the pre-consume script
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# (run_subprocess may also be called by _extract_text_for_archive_check)
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# (run_subprocess may also be called by pdf_born_digital_text via pdftotext)
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script_call = next(
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call
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for call in m.call_args_list
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@@ -134,60 +134,32 @@ class TestShouldProduceArchive:
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assert should_produce_archive(parser, mime, Path("/tmp/doc")) is expected
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@pytest.mark.parametrize(
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("extracted_text", "expected"),
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("born_digital", "expected"),
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[
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pytest.param(
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"This is a born-digital PDF with lots of text content. " * 10,
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False,
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id="born-digital-long-text-skips-archive",
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),
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pytest.param(None, True, id="no-text-scanned-produces-archive"),
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pytest.param("tiny", True, id="short-text-treated-as-scanned"),
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pytest.param(True, False, id="born-digital-skips-archive"),
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pytest.param(False, True, id="not-born-digital-produces-archive"),
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],
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)
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def test_auto_pdf_archive_decision(
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self,
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mocker: MockerFixture,
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settings,
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extracted_text: str | None,
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born_digital: bool, # noqa: FBT001
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expected: bool, # noqa: FBT001
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) -> None:
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"""Archive decision tracks pdf_born_digital_text()'s verdict exactly.
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should_produce_archive() defers entirely to pdf_born_digital_text()
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for the has-real-text decision, so both callers of that predicate
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(this function and RasterisedDocumentParser.parse()) always agree.
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"""
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settings.ARCHIVE_FILE_GENERATION = "auto"
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mocker.patch("documents.consumer.is_tagged_pdf", return_value=False)
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mocker.patch("documents.consumer.extract_pdf_text", return_value=extracted_text)
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mocker.patch(
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"documents.consumer.pdf_born_digital_text",
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return_value=("some text", born_digital),
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)
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parser = _parser_instance(can_produce=True, requires_rendition=False)
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assert (
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should_produce_archive(parser, "application/pdf", Path("/tmp/doc.pdf"))
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is expected
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)
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def test_tagged_pdf_skips_archive_in_auto_mode(
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self,
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mocker: MockerFixture,
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settings,
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) -> None:
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"""Tagged PDFs (e.g. Word exports) with real text are treated as born-digital, even below PDF_TEXT_MIN_LENGTH."""
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settings.ARCHIVE_FILE_GENERATION = "auto"
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mocker.patch("documents.consumer.is_tagged_pdf", return_value=True)
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mocker.patch("documents.consumer.extract_pdf_text", return_value="tiny")
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parser = _parser_instance(can_produce=True, requires_rendition=False)
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assert (
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should_produce_archive(parser, "application/pdf", Path("/tmp/doc.pdf"))
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is False
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)
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def test_tagged_pdf_without_text_produces_archive(
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self,
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mocker: MockerFixture,
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settings,
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) -> None:
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"""A tagged PDF with no actual extractable text (e.g. some scanner firmware) is not
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trusted as born-digital — the tag alone must not bypass OCR."""
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settings.ARCHIVE_FILE_GENERATION = "auto"
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mocker.patch("documents.consumer.is_tagged_pdf", return_value=True)
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mocker.patch("documents.consumer.extract_pdf_text", return_value=None)
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parser = _parser_instance(can_produce=True, requires_rendition=False)
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assert (
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should_produce_archive(parser, "application/pdf", Path("/tmp/doc.pdf"))
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is True
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)
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