Removing a filed in a json using mutate filter in logstash

Elastic Stack Logstash
#1

I have a json where i need to remove a field using mutate or any other filter,

  {
      "clientUserAgent": null,
      "environment": "Logs_0z9uc0nzlh/qa",
      "timestamp": 1566220446505,
      "sequence": 3,
      "payload": {
        "message": "(39087291-c283-11e9-943a-b9a377a9da4d) Endpoint request body after transformations: {\"type\":\"TOKEN\",\"methodArn\":\"arn:aws:execute-api:eu-west-1:/PUT/v2/en\",\"authorizationToken\":\"eyJhbGciOiJIUzI1NiJ9\"}"
      },
      "@version": "1",
      "@timestamp": "2019-08-19T13:14:06.505Z"
    }

I have tried using the mutate filter to remove the filed authorizationToken and below is my filter, but it is not working as expected

filter {
mutate { remove_field => [ "[payload][message][authorizationToken]"]
}
}

Can anyone give me an idea about how to get rid of the authorizationToken field in the json?

#2

[payload][message][authorizationToken] does not exist. [payload][message] is a string. Try

mutate { gsub => [ "message", ',"authorizationToken":"[^"]+"', "" ] }
#3

Thanks Badger, I tried this one but its not removing authorizationToken. Its returns the same input as output. The message part actually looks like this

   {
      "clientUserAgent": null,
      "environment": "Logs_0z9uc0nzlh/qa",
      "timestamp": 1566220446505,
      "sequence": 3,
      "payload": {
        "message": "(39087291-c283-11e9-943a-b9a377a9da4d) Endpoint request body after transformations: {\"type\":\"TOKEN\",\"methodArn\":\"arn:aws:execute-api:eu-west-1:/PUT/v2/en\",\"authorizationToken\":\"eyJhbGciOiJIUzI1NiJ9\"}"
      },
      "@version": "1",
      "@timestamp": "2019-08-19T13:14:06.505Z"
    }
#4

Sorry, I meant

mutate { gsub => [ "[payload][message]", ',"authorizationToken":"[^"]+"', "" ] }

#5

Thanks Badger.its working as expected

#6

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