body is not returned for reboot server request with xml format

When reboot a server with xml format, it is not returning body (instead just returns header)

steps:

curl -i http://15.184.83.251:8774/v2/af02f8670c2e45c182cf2e6a3dc1b5df/servers/0d9e5f5f-ea2b-4d68-8ecb-0c7540888d08/action -X POST -H "X-Auth-Project-Id: nova_auto_project" -H "User-Agent: python-novaclient" -H "Content-Type: application/xml" -H "Accept: application/xml" -H "X-Auth-Token: 731ec76e675b405689c4d5c1da3bdead"
-d '<?xml version="1.0" encoding="UTF-8"?> <reboot xmlns="http://15.184.83.251:5000/v2.0" type="SOFT"/>'

Output:

{'date': 'Fri, 10 Aug 2012 10:21:08 GMT', 'status': '202', 'content-length': '0', 'content-type': 'text/html; charset=UTF-8'}

Expected Result: reboot server should also return body (in xml format) with server details
Actual Result: Body is not return for reboot server request with xml format