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https://issues.apache.org/jira/browse/TIKA-5057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18144105#comment-18144105
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Tim Allison edited comment on TIKA-5057 at 11/13/26, 12:37 AM:
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[~henrylindemanglean] lemme know if you find any surprises. This was bit of
work. :P :rofl:
was (Author: [email protected]):
[~henrylindemanglean] lemme know if you find any surprises. This was bit of
work. :P
> General improvements to onenote parser
> --------------------------------------
>
> Key: TIKA-5057
> URL: https://issues.apache.org/jira/browse/TIKA-5057
> Project: Tika
> Issue Type: Task
> Reporter: Tim Allison
> Priority: Trivial
> Fix For: 4.3.0
>
>
> When I have extra tokens, I'll have an agent focus on a parser at a time for
> robustness and simplicity. Let's start with onenote. CC [~henrylindemanglean]
> :robot: swarm recommends:
> {noformat}
> Native .one path (the common format, unrelated to TIKA-5055):
> 1. Exponential parse on shared child lists (OneNotePtr:714). A file-node
> list referenced twice is parsed twice. Only the current path is checked for
> cycles, so a crafted file of a few KB blows up as 2^depth. Three reviewers
> found this independently.
> 2. Exponential tree walk (OneNoteTreeWalker:648). The same shape: shared
> objects are walked once per reference path. Each visit also builds and keeps
> a HashMap of decoded properties, which OneNoteParser:144 throws away.
> 3. Wrong references, lost text (OneNotePtr:1185). The OID/OSID/ContextID
> stream position is copied to a local variable and never written back. Every
> reference property starts again at stream[0], so later references are never
> walked. It also removes the
> cap on reference counts.
> 4. Duplicate text in real files (OneNoteTreeWalker:569-592). Reproduced:
> testOneNote2.one produces 176 paragraphs, 105 of them "Untitled picture.png".
> Image filenames and TextExtendedAscii text are never deduplicated and ignore
> the revision filter.
> 5. Unchecked counts and budgets (OneNotePtr:838, :518, :809):
> - ObjectInfoDependencyOverrideData counts are unbounded.
> - The global-ID cap applies per node, with no total.
> - A negative FileDataStoreObject length gets through.
> 6. Smaller issues:
> - Embedded file data is read in full before shouldParseEmbedded is asked
> (OneNoteTreeWalker:435).
> - The UTF-16 NUL terminator stays in author names and image filenames.
> Legacy string dump, used whenever a parse falls back
> (OneNoteLegacyDumpStrings:95):
> - Never resets its buffer at 1 MB boundaries. A long run is emitted again
> at every boundary, so work grows quadratically and normal files over 1 MB get
> duplicated text.
> - Small bugs: it drops the last byte of each buffer,
> Character.isWhitespace(i) tests the loop index instead of the character, and
> split(" ") allocates one String per word.
> Fallback after a partial walk (OneNoteParser:172, :197): on both paths, the
> full legacy dump is added after whatever the failed walk already wrote, so
> content appears twice.
> FSSHTTPB:
> - GUIDs are MD5 hashes, not decoded (BitReader:140, AdapterHelper:37). They
> come from UUID.nameUUIDFromBytes. As a result:
> - Encrypted sections are never detected; the check at
> MSOneStoreParser:328 can't match.
> - Embedded relationship IDs contain hashed GUIDs.
> - Every cell mapping copies its whole revision chain
> (MSOneStoreParser:362), so the cost grows with mappings × objects.
> - Slow spots:
> - removeSupersededObjects is O(n²) (:393).
> - resourceInfoFromReferencingObject scans every object for each unnamed
> blob (MSOneStorePackage:1140).
> - hasUsablePicture copies a whole blob just to check it's non-empty
> (:1118).
> - Small port bugs:
> - cProperties is read as signed, so values ≥ 0x8000 abort the parse.
> - An undefined property type throws an NPE.
> - StorageManifestSchemaGUID reads from offset 0 instead of the current
> position.
> - BitConverter's bounds check ignores the index.
> Dead code:
> - The serialize/write path: 65 files, about 970 lines.
> - The FSSHTTPD chunking/build side.
> - getContent() and its builders.
> - Unreferenced classes: Error, PropertyIDType, RequestTypes, UMath.
> - Debug print() methods and option branches that are never set.
> {noformat}
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