Symantec Protect Engine

Hi,

I am currently testing the trial version of symantec protection engine. I am not sure about the response i am sending to the server.

For a clean file the response is

ICAP/1.0 204 No Content Necessary
ISTag: "B41A93E53F1B67B8551C585752E74D89"
Date: Mon Mar 02 18:34:47 2015 GMT
Service: Symantec Protection Engine/7.5.1.5
Service-ID: Respmod AV Scan

ICAP/1.0 204 No Content Necessary
ISTag: "B41A93E53F1B67B8551C585752E74D89"
Date: Mon Mar 02 18:34:47 2015 GMT
Service: Symantec Protection Engine/7.5.1.5
Service-ID: Respmod AV Scan
X-Outer-Container-Is-Mime: 0

For a infected file with dummy virus the response is like

ICAP/1.0 200 OK
ISTag: "B41A93E53F1B67B8551C585752E74D89"
Date: Mon Mar 02 17:23:31 2015 GMT
Service: Symantec Protection Engine/7.5.1.5
Service-ID: Respmod AV Scan
X-Infection-Found: Type=0; Resolution=0; Threat=EICAR Test String;
X-Violations-Found: 1
        test.txt
        EICAR Test String
        11101
        0
X-Outer-Container-Is-Mime: 0

ICAP/1.0 200 OK
ISTag: "B41A93E53F1B67B8551C585752E74D89"
Date: Mon Mar 02 17:23:31 2015 GMT
Service: Symantec Protection Engine/7.5.1.5
Service-ID: Respmod AV Scan
X-Infection-Found: Type=0; Resolution=0; Threat=EICAR Test String;
X-Violations-Found: 1
        test.txt
        EICAR Test String
        11101
        0
 

please let me know what is the meaning of status 200 and 204 and how to know if the file is clean?

Thanks

Shriram