multidict.py 文件源码

def from_fieldstorage(cls, fs):
        """
        Create a dict from a cgi.FieldStorage instance
        """
        obj = cls()
        # fs.list can be None when there's nothing to parse
        for field in fs.list or ():
            charset = field.type_options.get('charset', 'utf8')
            transfer_encoding = field.headers.get('Content-Transfer-Encoding', None)
            supported_tranfer_encoding = {
                'base64' : binascii.a2b_base64,
                'quoted-printable' : binascii.a2b_qp
                }
            if PY3: # pragma: no cover
                if charset == 'utf8':
                    decode = lambda b: b
                else:
                    decode = lambda b: b.encode('utf8').decode(charset)
            else:
                decode = lambda b: b.decode(charset)
            if field.filename:
                field.filename = decode(field.filename)
                obj.add(field.name, field)
            else:
                value = field.value
                if transfer_encoding in supported_tranfer_encoding:
                    if PY3: # pragma: no cover
                        # binascii accepts bytes
                        value = value.encode('utf8')
                    value = supported_tranfer_encoding[transfer_encoding](value)
                    if PY3: # pragma: no cover
                        # binascii returns bytes
                        value = value.decode('utf8')
                obj.add(field.name, decode(value))
        return obj