Example parser for Network logs from Selenium / Chrome

performance_logs_network.rb

# Since Ruby preserves hash key insertion order, you can iterate over values.
request_hash = Hash.new { |h, k| h[k] = {} }

# Used to convert event timestamps to epoch time.
wall_time_offset = nil

# Note: Calling logs.get() will clear the log buffer.
performance_logs = page.driver.browser.manage.logs.get('performance')

# Extract request / response data from log messages.
performance_logs.each do |log_entry|
  message_raw = log_entry.message
  if message_raw =~ /Network\.(requestWillBeSent|responseReceived)/
    message_type = $1
    message_params = JSON.parse(message_raw)['message']['params']
    request_id = message_params['requestId']

    if message_type == 'requestWillBeSent'
      wall_time_offset ||= message_params['wallTime'] - message_params['timestamp']
      request_hash[request_id] = {
          method: message_params['request']['method'],
          request_time: message_params['timestamp'],
          url: message_params['request']['url'],
      }
    elsif request_hash.has_key? request_id
      request_hash[request_id].merge!({
          response_time: message_params['timestamp'],
          response_status: message_params['response']['status']
      })
    end
  end
end

# Convert relative time deltas to timestamps.
request_hash.values.each do |entry|
  entry[:request_time] = Time.at(entry[:request_time] + wall_time_offset).utc if entry[:request_time]
  entry[:response_time] = Time.at(entry[:response_time] + wall_time_offset).utc if entry[:response_time]
end

Nice! Thanks for sharing 👍

The only remark I have to keep it working today is that I had to update the regexp because there can be some Network.responseReceivedExtraInfo and so on, so I have updated it with /"Network\.(requestWillBeSent|responseReceived)"/ and all is fine.