curl -i -X DELETE 'http://localhost:8000/virtualbox/{uuid}/ports/{port_id:\d+}/nio'

DELETE /virtualbox/{uuid}/ports/{port_id:\d+}/nio HTTP/1.1



HTTP/1.1 204
CONNECTION: keep-alive
CONTENT-LENGTH: 0
DATE: Thu, 08 Jan 2015 16:09:15 GMT
SERVER: Python/3.4 GNS3/1.3.dev1
X-ROUTE: /virtualbox/{uuid}/ports/{port_id:\d+}/nio