message.py 文件源码

def sanitize_address(addr, encoding):
    if not isinstance(addr, tuple):
        addr = parseaddr(force_text(addr))
    nm, addr = addr
    nm = Header(nm, encoding).encode()
    try:
        addr.encode('ascii')
    except UnicodeEncodeError:  # IDN
        if '@' in addr:
            localpart, domain = addr.split('@', 1)
            localpart = str(Header(localpart, encoding))
            domain = domain.encode('idna').decode('ascii')
            addr = '@'.join([localpart, domain])
        else:
            addr = Header(addr, encoding).encode()
    return formataddr((nm, addr))