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ad3a271fc4
*This patch improves handling of a couple of PDF documents from issue 14303.* - Update `XRef.indexObjects` to actually clear *all* XRef-caches. Invalid XRef tables *usually* cause issues early enough during parsing that we've not populated the XRef-cache, however to prevent any issues we obviously need to clear that one as well. - Improve the /Root dictionary validation in `XRef.parse` (PR 9827 follow-up). In addition to checking that a /Pages entry exists, we'll now also check that it can be successfully fetched *and* that it's of the correct type. There's really no point trying to use a /Root dictionary that e.g. `Catalog.toplevelPagesDict` will reject, and this way we'll be able to fallback to indexing the objects in corrupt documents. - Throw an `InvalidPDFException`, rather than a general `FormatError`, in `XRef.parse` when no usable /Root dictionary could be found. That really seems more appropriate overall, since all attempts at parsing/recovery have failed. (This part of the patch is API-observable, hence the tag.) With these changes, two existing test-cases are improved and the unit-tests are updated/re-factored to highlight that. In particular `GHOSTSCRIPT-698804-1-fuzzed.pdf` will now both load and "render" correctly, whereas `poppler-395-0-fuzzed.pdf` will now fail immediately upon loading (rather than *appearing* to work). |
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| .. | ||
| core | ||
| display | ||
| images | ||
| scripting_api | ||
| shared | ||
| doc_helper.js | ||
| interfaces.js | ||
| license_header.js | ||
| license_header_libre.js | ||
| pdf.image_decoders.js | ||
| pdf.js | ||
| pdf.sandbox.external.js | ||
| pdf.sandbox.js | ||
| pdf.scripting.js | ||
| pdf.worker.entry.js | ||
| pdf.worker.js | ||
| worker_loader.js | ||