[Bug]: Chunked request in requestes #580

class RequestsOpenAPIRequestFix(RequestsOpenAPIRequest):
    def __init__(self, *args):
        super().__init__(*args)
        self._body_buffer = ''

    @property
    def mimetype(self) -> str:
        return super().mimetype.split(';')[0]

    @property
    def body(self) -> Optional[str]:
        if isinstance(self.request.body, types.GeneratorType):
            for part in self.request.body:
                self._body_buffer += part.decode('utf-8')
            return self._body_buffer
        if self.mimetype.startswith('image'):
            return None
        return super().body