[BUG] partially corrupt PDF causes blank pages

[samuel]

I have a partially corrupt PDF that works fine in other places I've tried it (e.g. Preview.app on mac, MyPDF, Acrobat), but when reading with UniPDF the first 3 of 4 pages are blank. Running it through mutool clean repairs it so it seems there's enough information to be able to properly read the document. Unfortunately, because it contains sensitive medical information (PHI) I can't share the specific file, but perhaps something can be gleaned from the errors output from unipdf. I will see if it's possible to get a PDF showing the same issue generated that doesn't have PHI.

[DEBUG]  core.go:336 Pdf version 1.7
[DEBUG]  core.go:587 Warning: Unable to find xref table or stream. Repair attempted: Looking for earliest xref from bottom.
[DEBUG]  core.go:1409 ERROR: Unable to find object signature (���1Ҡ��-�����YI)
[DEBUG]  core.go:1262 ERROR Failed reading xref (unable to detect indirect object signature)
[DEBUG]  core.go:1263 Attempting to repair xrefs (top down)

Also, I don't see a way to connect the ERRORs that are logged to the specific PDF that is being read since there can be multiple concurrent uses of the library. Is there any way to read a PDF in a more "strict" mode that returns an error from the read functions rather than logging and attempting repair? This way it would be possible to inform the user that their PDF is partially corrupt.

[github-actions]

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[samuel]

Note we have a commercial license (under Spruce Health Inc) so perhaps there's a more appropriate avenue for getting support let me know.

Thanks.

[gunnsth]

@samuel Please use our service desk https://unidoc.atlassian.net/servicedesk/customer/portal/8 and contact support@unidoc.io if there are any problems with access.