Daniel Bedeleanu
ea49cd6e4a
- Create backend/services/image_storage.py with 4 core functions:
- sanitize_filename(): remove unsafe chars, limit to 255 chars, convert to lowercase
- get_unique_filename(): handle collisions with UUID suffix (format: {name}_{uuid8}_{variant}.jpg)
- ensure_image_directories(): create /images/ root and category subdirs on startup
- save_image(): save bytes to /images/{category}/{filename}, returns relative path
- Create comprehensive test suite (22 tests) covering all functionality
- Integrate ensure_image_directories() into FastAPI startup event
- Directory structure: /images/{category}/{filename}
- Collision handling: auto-suffix with UUID if filename exists
- All tests passing, pathlib.Path for safe operations
46 lines
1.1 KiB
Python
46 lines
1.1 KiB
Python
from __future__ import annotations
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import time
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__all__ = ["Deadline"]
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class Deadline:
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"""
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Manage timeouts across multiple steps.
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Args:
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timeout: Time available in seconds or :obj:`None` if there is no limit.
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"""
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def __init__(self, timeout: float | None) -> None:
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self.deadline: float | None
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if timeout is None:
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self.deadline = None
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else:
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self.deadline = time.monotonic() + timeout
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def timeout(self, *, raise_if_elapsed: bool = True) -> float | None:
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"""
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Calculate a timeout from a deadline.
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Args:
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raise_if_elapsed: Whether to raise :exc:`TimeoutError`
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if the deadline lapsed.
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Raises:
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TimeoutError: If the deadline lapsed.
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Returns:
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Time left in seconds or :obj:`None` if there is no limit.
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"""
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if self.deadline is None:
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return None
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timeout = self.deadline - time.monotonic()
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if raise_if_elapsed and timeout <= 0:
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raise TimeoutError("timed out")
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return timeout
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