Method encoding

httpx/_models.py:167–189

Header encoding is mandated as ascii, but we allow fallbacks to utf-8 or iso-8859-1.

(self)

    @property
    def encoding(self) -> str:
        """
        Header encoding is mandated as ascii, but we allow fallbacks to utf-8
        or iso-8859-1.
        """
        if self._encoding is None:
            for encoding in ["ascii", "utf-8"]:
                for key, value in self.raw:
                    try:
                        key.decode(encoding)
                        value.decode(encoding)
                    except UnicodeDecodeError:
                        break
                else:
                    # The else block runs if 'break' did not occur, meaning
                    # all values fitted the encoding.
                    self._encoding = encoding
                    break
            else:
                # The ISO-8859-1 encoding covers all 256 code points in a byte,
                # so will never raise decode errors.
                self._encoding = "iso-8859-1"
        return self._encoding

    @encoding.setter
    def encoding(self, value: str) -> None: