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Content Disposition Filename Parse

Parse Content-Disposition headers for safe filename extraction with RFC 5987 support.

PythonFile Upload

Code

snippet
from urllib.parse import unquote
import re

def parse_filename(header):
    if not header:
        return None
    m = re.search(r"filename\*=([^;]+)", header)
    if m:
        parts = m.group(1).split("'")
        if len(parts) == 3:
            return unquote(parts[2])
        return unquote(parts[-1])
    m = re.search(r'filename="?([^";]+)"?', header)
    if m:
        return m.group(1)
    return None

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