class ElasticAPM::Spies::HTTPSpy

def install
  ::HTTP::Client.class_eval do
    alias perform_without_apm perform
    def perform(req, options)
      unless (transaction = ElasticAPM.current_transaction)
        return perform_without_apm(req, options)
      end
      method = req.verb.to_s.upcase
      host = req.uri.host
      name = "#{method} #{host}"
      type = "ext.http_rb.#{method}"
      ElasticAPM.with_span name, type do |span|
        req['Elastic-Apm-Traceparent'] =
          transaction.traceparent.to_header(span_id: span.id)
        perform_without_apm(req, options)
      end
    end
  end
end

def perform(req, options)
  unless (transaction = ElasticAPM.current_transaction)
    return perform_without_apm(req, options)
  end
  method = req.verb.to_s.upcase
  host = req.uri.host
  name = "#{method} #{host}"
  type = "ext.http_rb.#{method}"
  ElasticAPM.with_span name, type do |span|
    req['Elastic-Apm-Traceparent'] =
      transaction.traceparent.to_header(span_id: span.id)
    perform_without_apm(req, options)
  end
end