def encode_bytes(self, source): """encode bytes to base64 string. :arg source: byte string to encode. :returns: byte string containing encoded data. """ if not isinstance(source, bytes): raise TypeError("source must be bytes, not %s" % (type(source), )) chunks, tail = divmod(len(source), 3) if PY3: next_value = nextgetter(iter(source)) else: next_value = nextgetter(ord(elem) for elem in source) gen = self._encode_bytes(next_value, chunks, tail) out = join_byte_elems(imap(self._encode64, gen)) # if tail: ## padding = self.padding # if padding: ## out += padding * (3-tail) return out
def encode_bytes(self, source): """encode bytes to base64 string. :arg source: byte string to encode. :returns: byte string containing encoded data. """ if not isinstance(source, bytes): raise TypeError("source must be bytes, not %s" % (type(source),)) chunks, tail = divmod(len(source), 3) if PY3: next_value = nextgetter(iter(source)) else: next_value = nextgetter(ord(elem) for elem in source) gen = self._encode_bytes(next_value, chunks, tail) out = join_byte_elems(imap(self._encode64, gen)) ##if tail: ## padding = self.padding ## if padding: ## out += padding * (3-tail) return out
def decode_bytes(self, source): """decode bytes from base64 string. :arg source: byte string to decode. :returns: byte string containing decoded data. """ if not isinstance(source, bytes): raise TypeError("source must be bytes, not %s" % (type(source),)) ##padding = self.padding ##if padding: ## # TODO: add padding size check? ## source = source.rstrip(padding) chunks, tail = divmod(len(source), 4) if tail == 1: # only 6 bits left, can't encode a whole byte! raise ValueError("input string length cannot be == 1 mod 4") next_value = nextgetter(imap(self._decode64, source)) try: return join_byte_values(self._decode_bytes(next_value, chunks, tail)) except KeyError as err: raise ValueError("invalid character: %r" % (err.args[0],))
def decode_bytes(self, source): """decode bytes from base64 string. :arg source: byte string to decode. :returns: byte string containing decoded data. """ if not isinstance(source, bytes): raise TypeError("source must be bytes, not %s" % (type(source),)) ##padding = self.padding ##if padding: ## # TODO: add padding size check? ## source = source.rstrip(padding) chunks, tail = divmod(len(source), 4) if tail == 1: # only 6 bits left, can't encode a whole byte! raise ValueError("input string length cannot be == 1 mod 4") next_value = nextgetter(imap(self._decode64, source)) try: return join_byte_values(self._decode_bytes(next_value, chunks, tail)) except KeyError as err: raise ValueError("invalid character: %r" % (err.args[0],))