Real-world plant() crashed with OSError [Errno 7] Argument list too
long when an artifact (honeydoc HTML / DOCX / PDF) base64-encoded
into the sh -c script body exceeded the kernel's argv limit (typically
128KB-2MB depending on the host).
Fix: keep the script trivial ('mkdir -p ... && base64 -d > path && ...')
and stream the encoded bytes through 'docker exec -i ... sh -c'
stdin instead. _run() grew an optional stdin_bytes parameter that's
piped into proc.communicate(input=...). The stdin path covers
arbitrarily large artifacts.
Tests updated:
- test_plant_argv_and_base64_round_trip now asserts the docker -i
flag is present and the base64 payload reaches stdin (and notably
is NOT in the script body).
- _FakeProc.communicate accepts input=None across the board so the
patched fast path no longer trips on the new kwarg.
Two sub-routers under /api/v1/canary:
blobs (operator-uploaded artifacts, deduped by sha256):
- POST /blobs (multipart upload; admin)
- GET /blobs (list with token_count; admin)
- DELETE /blobs/{uuid} (refcount-aware; 409 when referenced; admin)
tokens (per-decky planted artifacts):
- POST /tokens (generate or instrument + plant; admin)
- GET /tokens?decky_name=&kind=&state= (filter; viewer)
- GET /tokens/{uuid} (detail; viewer)
- GET /tokens/{uuid}/preview (instrumented bytes; admin)
- GET /tokens/{uuid}/triggers (paged callback log; viewer)
- DELETE /tokens/{uuid} (revoke + bus event; admin)
XOR validation: exactly one of blob_uuid / generator must be set.
Path validation rejects relative/NUL/newlines/.. segments. Every
body-bearing route documents 400 plus 401/403/404 as applicable.
Stdlib MIME sniffer (no python-magic dep) covers PNG/JPEG/GIF/PDF/
HTML/XML/DOCX/XLSX/JSON/YAML/TOML/text/plain; everything else falls
through to passthrough.
Tests run end-to-end through the live FastAPI app (planter docker
exec is patched); 17 cases covering dedup, refcount, lifecycle,
XOR validation, path validation, and 404 paths.
