async def METHOD_NAME(self, request: SynapseRequest) -> None:
    requester = await self.auth.get_user_by_req(request)
    raw_content_length = request.getHeader("Content-Length")
    if raw_content_length is None:
        raise SynapseError(msg="Request must specify a Content-Length", code=400)
    try:
        content_length = int(raw_content_length)
    except ValueError:
        raise SynapseError(msg="Content-Length value is invalid", code=400)
    if content_length > self.max_upload_size:
        raise SynapseError(
            msg="Upload request body is too large",
            code=413,
            errcode=Codes.TOO_LARGE,
        )
    args: Dict[bytes, List[bytes]] = request.args  # type: ignore
    upload_name_bytes = parse_bytes_from_args(args, "filename")
    if upload_name_bytes:
        try:
            upload_name: Optional[str] = upload_name_bytes.decode("utf8")
        except UnicodeDecodeError:
            raise SynapseError(
                msg="Invalid UTF-8 filename parameter: %r" % (upload_name_bytes,),
                code=400,
            )
    # If the name is falsey (e.g. an empty byte string) ensure it is None.
    else:
        upload_name = None
    headers = request.requestHeaders
    if headers.hasHeader(b"Content-Type"):
        content_type_headers = headers.getRawHeaders(b"Content-Type")
        assert content_type_headers  # for mypy
        media_type = content_type_headers[0].decode("ascii")
    else:
        media_type = "application/octet-stream"
    # if headers.hasHeader(b"Content-Disposition"):
    #     disposition = headers.getRawHeaders(b"Content-Disposition")[0]
    # TODO(markjh): parse content-dispostion
    try:
        content: IO = request.content  # type: ignore
        content_uri = await self.media_repo.create_content(
            media_type, upload_name, content, content_length, requester.user
        )
    except SpamMediaException:
        # For uploading of media we want to respond with a 400, instead of
        # the default 404, as that would just be confusing.
        raise SynapseError(400, "Bad content")
    logger.info("Uploaded content with URI '%s'", content_uri)
    respond_with_json(
        request, 200, {"content_uri": str(content_uri)}, send_cors=True
    )