Ruby request and logstash

Hi,

I'm trying to make a ruby request to Elasticsearch using Logstash and ruby.
this is my filter part in the config file.

filter {
       
json {
              source => "message"
           }
         }

     ruby {
                   init => "
                                require 'net/http'
                                require 'net/https'
                                require 'uri'
                                require 'json'
                        "
                   code => "
                             puts  uri = URI('https://xxx.xxx.xx.xxx:9200/index/doc/_search')
        
                                Net::HTTP.start(uri.host, uri.port,
                                  :use_ssl => uri.scheme == 'https', 
                                  :verify_mode => OpenSSL::SSL::VERIFY_NONE) do |http|

                                  request = Net::HTTP::Get.new uri.request_uri
                                  request.Content-Type = 'application/json'
                                  request.basic_auth 'user', 'password'
                                  request.body = '{\n  \"query\": {\n    \"term\": {\n  \"Carriles.keyword\": \"DAI-CAI LOPEZMESA-P1-L0\"\n }\n }\n}'
                                  response = http.request request # Net::HTTPResponse object
                                  puts response.body
                                                                 
                               end
        
                     

                             "
                 

                }
                mutate { remove_field => ["message"] }
}

I need the response from the query to elastic. But I only get this message from ruby and I don't now what is wrong.

[ERROR] 2019-08-23 12:27:45.985 [Ruby-0-Thread-4: :1] ruby - Ruby exception occurred: end of file reached

Not sure what the exception means, but you do know there is an elasticsearch filter you can use, right?