def _get_header_lines(self, version):
result = []
phrase = HTTPStatus(self.status).phrase
result.append(b'HTTP/%s %i %s' %
(version.encode(), self.status, phrase.encode()))
for header, value in self.headers.items():
result.append(b'%s: %s' % (header.encode(), value.encode()))
result.append(b'\r\n')
return b'\r\n'.join(result)
