Detect Confluence-exported DOC files stored in FileContents stream

test_unstructured/file_utils/test_filetype.py

@@ -968,6 +968,25 @@ def it_distinguishes_the_file_type_of_applicable_CFB_files(
 
         assert _OleFileDetector.file_type(ctx) is expected_value
 
+    def it_detects_confluence_exported_doc_files(self, monkeypatch: pytest.MonkeyPatch):
+        """Detect Confluence-exported DOC files that store content in FileContents."""
+        with open(example_doc_path("simple.doc"), "rb") as f:
+            file = io.BytesIO(f.read())
+        ctx = _FileTypeDetectionContext(file=file)
+
+        class MockStream:
+            name = "FileContents"
+
+        class MockStorage:
+            streams = [MockStream()]
+
+        monkeypatch.setattr(
+            "unstructured.file_utils.filetype.Storage.from_ole",
+            lambda _: MockStorage(),
+        )
+
+        assert _OleFileDetector.file_type(ctx) is FileType.DOC
+
 
 class Describe_TextFileDifferentiator:
     """Unit-test suite for `unstructured.file_utils.filetype._TextFileDifferentiator`."""

unstructured/file_utils/filetype.py

@@ -715,6 +715,9 @@ def _ole_file_type(self) -> FileType | None:
         for stream in root_storage.streams:
             if stream.name == "WordDocument":
                 return FileType.DOC
+            elif stream.name == "FileContents":
+                # Confluence-exported legacy DOC files store content in this stream.
+                return FileType.DOC
             elif stream.name == "PowerPoint Document":
                 return FileType.PPT
             elif stream.name == "Workbook":