The browse tab in the EspoCRM KnowledgeBase extension needs the original
PDF (with columns, tables, labels) to render layout-heavy sources like
ספר הליקויים readably. The plain-text chunk view loses the structure
because the PDF itself places each word as a separate text block.
New route:
- GET /kb/source/{id}/pdf — resolves the source's `original_path`
(stored as `s3://insurance-kb/processed/<kind>/<file>.pdf`), streams
the bytes from MinIO via the existing kb_s3.fetch helper, and returns
them with Content-Type: application/pdf + inline Content-Disposition.
- 404 when the source doesn't exist.
- 409 when the source was ingested as plain text (e.g. the law from
Wikisource — its original_path ends in .txt, not .pdf).
- Response is chunked (64 KB) to avoid pinning a 2 MB buffer for every
request.
Also select `original_path` in /kb/source/{id}/chunks so the frontend
can decide whether to render the PDF viewer or the chunk list.
Refs Task Master #2
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
chaim
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