45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
import hashlib
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import logging
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from pathlib import Path
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from typing import Optional
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logger = logging.getLogger(__name__)
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def calculate_sha256(file_path: Path) -> Optional[str]:
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"""
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Calculates the SHA-256 hash of a file.
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Args:
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file_path: The path to the file.
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Returns:
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The SHA-256 hash as a hexadecimal string, or None if an error occurs.
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"""
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if not isinstance(file_path, Path):
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try:
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file_path = Path(file_path)
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except TypeError:
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logger.error(f"Invalid file path type: {type(file_path)}. Expected Path object or string.")
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return None
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if not file_path.is_file():
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logger.error(f"File not found or is not a regular file: {file_path}")
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return None
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sha256_hash = hashlib.sha256()
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buffer_size = 65536 # Read in 64k chunks
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try:
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with open(file_path, "rb") as f:
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while True:
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data = f.read(buffer_size)
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if not data:
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break
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sha256_hash.update(data)
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return sha256_hash.hexdigest()
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except IOError as e:
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logger.error(f"Error reading file {file_path}: {e}")
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return None
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except Exception as e:
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logger.error(f"An unexpected error occurred while hashing {file_path}: {e}")
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return None |