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Fix multi-worker temp file issue with file-based storage

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- New temp_storage.py module stores files on disk instead of in-memory
- Multiple Gunicorn workers can now share temp files
- Startup cleanup removes leftover files from previous runs
- Dockerfile creates temp_files directory
- Added temp_files/ to .gitignore

Previously encode preview worked but download failed with "File expired"
because each worker had its own in-memory TEMP_FILES dict.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Aaron D. Lee
2026-01-05 22:40:42 -05:00
parent d8eb7b0160
commit 6a5b12f98e
4 changed files with 257 additions and 48 deletions
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Dockerfile
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@@ -63,7 +63,8 @@ COPY data/ data/
COPY frontends/web/ frontends/web/
# Create upload directory and instance directories (for volumes)
RUN mkdir -p /tmp/stego_uploads /app/frontends/web/instance /app/frontends/web/certs
# temp_files is for multi-worker temp file sharing
RUN mkdir -p /tmp/stego_uploads /app/frontends/web/instance /app/frontends/web/certs /app/frontends/web/temp_files
# Create non-root user
RUN useradd -m -u 1000 stego && chown -R stego:stego /app /tmp/stego_uploads