Logstash nested JSON Array, split and parse on nested JSON without using Ruby code

[yelinaung]

How to split separate field on nested JSON Array.

Can someone kindly help with this? Thank you.

Below is the nested JSON array

Sample JSON Code

"http": {
  "request": {
    "headers": [
   {
     "Name": "Host",
     "Value": "example.com"
    },
    {
      "Name": "Connection",
      "Value": "keep-alive"
    }
   ]
  }
}

Sample My Code

split {
      field => "[http][request][headers]"
    }
    mutate {
      add_field => {
        "[http][request][headers][%{[http][request][headers][Name]}]" => "%{[http][request][headers][Value]}"
    }
      remove_field => [
         "[http][request][headers][Name]",
         "[http][request][headers][Value]"
     ]
  }

After the code output is getting only one field

[Tortoise]

Hello @yelinaung

If we consider below as an example record :

{"timestamp":"2025-08-13T06:40:00Z","http":{"request":{"headers":[{"Name":"Host","Value":"my.demo.net"},{"Name":"Connection","Value":"keep-alive"},{"Name":"Accept","Value":""},{"Name":"platform","Value":"raspberry-pi"}]}}}

Tried using below filter to map 4 fields to 4 values :

filter {
  mutate {
    add_field => { "message" => "%{[event][original]}" }
  }
  if [http][request][headers] {
    mutate {
      add_field => {
        "Host" => "%{[http][request][headers][0][Value]}"
        "Connection" => "%{[http][request][headers][1][Value]}"
        "Accept" => "%{[http][request][headers][2][Value]}"
        "platform" => "%{[http][request][headers][3][Value]}"
      }
    }
  }
  mutate {
    remove_field => ["http", "timestamp", "event", "log", "@version"]
  }
}

Thanks!!

[yelinaung]

Thanks for your instruction.