Method _decode

src/urllib3/response.py:619–654

Decode the data passed in and potentially flush the decoder.

(
        self,
        data: bytes,
        decode_content: bool | None,
        flush_decoder: bool,
        max_length: int | None = None,
    )

                    self._decoder = _get_decoder(content_encoding)

    def _decode(
        self,
        data: bytes,
        decode_content: bool | None,
        flush_decoder: bool,
        max_length: int | None = None,
    ) -> bytes:
        class="st">"""
        Decode the data passed in and potentially flush the decoder.
        class="st">"""
        if not decode_content:
            if self._has_decoded_content:
                raise RuntimeError(
                    class="st">"Calling read(decode_content=False) is not supported after "
                    class="st">"read(decode_content=True) was called."
                )
            return data

        if max_length is None or flush_decoder:
            max_length = -1

        try:
            if self._decoder:
                data = self._decoder.decompress(data, max_length=max_length)
                self._has_decoded_content = True
        except self.DECODER_ERROR_CLASSES as e:
            content_encoding = self.headers.get(class="st">"content-encoding", class="st">"").lower()
            raise DecodeError(
                class="st">"Received response with content-encoding: %s, but "
                class="st">"failed to decode it." % content_encoding,
                e,
            ) from e
        if flush_decoder:
            data += self._flush_decoder()

        return data

    def _flush_decoder(self) -> bytes:
        class="st">"""