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"""File extraction utilities for DMARC reports"""
import gzip
import zipfile
import tempfile
import os
from pathlib import Path
def extract_files(file_path):
"""Extract XML content from gzip or zip files
Args:
file_path: Path to the compressed file
Returns:
str: XML content if successful, None otherwise
"""
file_path = Path(file_path)
try:
if file_path.suffix == '.gz':
return _extract_gzip(file_path)
elif file_path.suffix == '.zip':
return _extract_zip(file_path)
else:
# Assume it's already XML
return file_path.read_text()
except Exception as e:
print(f"Error extracting {file_path}: {e}")
return None
def _extract_gzip(file_path):
"""Extract content from gzip file"""
with gzip.open(file_path, 'rt') as f:
return f.read()
def _extract_zip(file_path):
"""Extract content from zip file
For zip files, we look for XML files inside and return the first one
"""
with zipfile.ZipFile(file_path, 'r') as zip_ref:
# List all files in the zip
file_list = zip_ref.namelist()
# Find the first XML file
xml_file = None
for filename in file_list:
if filename.lower().endswith('.xml'):
xml_file = filename
break
if xml_file:
with zip_ref.open(xml_file) as f:
return f.read().decode('utf-8')
else:
# If no XML file found, try the first file
if file_list:
with zip_ref.open(file_list[0]) as f:
return f.read().decode('utf-8')
return None
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