Item Type HTTP Agent not parsing Json Response

[mreinhart]

Hi,

i have a C# Applicate that return a Json status. It looks like:

{
  "prtg": {
    "result": [
      {
        "channel": "DDS - ZDM - Konsistenzprüfung",
        "value": "3",
        "valuelookup": "prtg.RCLookup.DDS_ZDM_Check.BitField"
      },
      {
        "channel": "ZDM DB Verbindungsversuche",
        "value": "0",
        "valuelookup": "prtg.RCLookup.Default.DB.Connect.Retry"
      }
    ]
  }
}

Then i have a zabbix item witch type is http agent.
The request works fine. But i get the error:

Preprocessing failed for: HTTP/1.1 200 Ok..Content-Length: 361..Content-Type: application/json..Server: Grapevine/4.1.1.0 M...
1. Failed: cannot extract value from json by path ".prtg.result[0].value": cannot parse as a valid JSON object: invalid object format, expected opening character '{' or '[' at: 'HTTP/1.1 200 Ok
Content-Length: 361
Content-Type: application/json
Server: Grapevine/4.1.1.0 Microsoft-HTTPAPI/2.0
Date: Fri, 12 Apr 2019 14:19:12

What is wrong?

The JsonPath is: .prtg.result[0].value

Can help me everybody?

[mreinhart]

Is there nobody who can help me.

[vso]

did you select body only in frontend ?

[mreinhart]

Ok. That's was the trick. But i don't understand why. I select "Retrieve mode" to Body and it works.
Thanks!

[brunohl]

It was because you were trying to parse all the HTTP response, not just the body.
The HTTP response is like:

HTTP/1.1 200
Date: Mon, 27 Jul 2009 12:28:53 GMT

{
  "prtg": {
    "result": [
      {
        "channel": "DDS - ZDM - Konsistenzprüfung",
        "value": "3",
        "valuelookup": "prtg.RCLookup.DDS_ZDM_Check.BitField"
      },
      {
        "channel": "ZDM DB Verbindungsversuche",
        "value": "0",
        "valuelookup": "prtg.RCLookup.Default.DB.Connect.Retry"
      }
    ]
  }
}

You were trying to run JSON on all of this.

[mreinhart]

Oh. OK. thanks for the explanation.