agatha
f953c88984
- Add Pillow dependency and thumbnail.py with generate_thumbnail() — produces
WebP ≤400px, preserves aspect ratio, never upscales, handles GIF frame 0
- Alembic migration 002 adds nullable thumbnail_key column to images table
- Upload route generates thumbnail via asyncio.to_thread (non-blocking),
stores at {hash}-thumb; failure is tolerated and upload succeeds with null key
- New GET /api/v1/images/{id}/thumbnail endpoint: serves WebP thumbnail or
falls back to original for pre-feature images; ETag + immutable cache headers
- Delete route cleans up thumbnail storage object alongside original
- Library grid switches from /file to /thumbnail for all image src bindings
- 59 tests passing (46 existing + 13 new across unit, upload, serving, delete)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
17 lines
488 B
Python
17 lines
488 B
Python
import contextlib
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import io
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from PIL import Image
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def generate_thumbnail(data: bytes, mime_type: str) -> bytes:
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img = Image.open(io.BytesIO(data))
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with contextlib.suppress(EOFError):
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img.seek(0)
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if img.mode not in ("RGB", "RGBA"):
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img = img.convert("RGBA" if img.mode == "P" and "transparency" in img.info else "RGB")
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img.thumbnail((400, 400), Image.LANCZOS)
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buf = io.BytesIO()
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img.save(buf, format="WEBP", quality=80)
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return buf.getvalue()
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