Simple logger for Ruby Net::HTTP requests.

http_logger.rb

require 'net/http'
# The simplified version of logger can be copypasted into Rails initializer.
module HttpLogger
  def request(req, body = nil, &block)
    start_time = Time.current
    super.tap do |resp|
      log_request(http: self, request: req, response: resp, start_time: start_time) rescue nil
    end
  end

  private

  def log_request(http:, request:, response:, start_time:)
    request_duration = ((Time.current - start_time) * 1000).round
    request_url =
      URI.decode("http#{"s" if http.use_ssl?}://#{http.address}:#{http.port}#{request.path}")

    Rails.logger.info(name: 'http_request',
                      method: request.method,
                      url: request_url,
                      status: response.code,
                      duration: request_duration)
  end
end

Net::HTTP.prepend HttpLogger

http_logger_v2.rb

require 'net/http'

module HttpLogger
  module DSL
    def activate
      Net::HTTP.prepend HttpLogger
    end

    def activated?
      Net::HTTP.ancestors.include? HttpLogger
    end

    # Register a callback that will be called upon request completion.
    # Callback will receive following parameters:
    # http:  HTTP instance,
    # request: HTTP Request,
    # response: HTTP Response,
    # start_time: Request Start Time (with time zone)
    # Example:
    #   HttpLogger.after_request do |http:, request:, response:, start_time:|
    #     # log request details
    #   end
    def after_request(&block)
      after_request_callbacks << block
    end

    def after_request_callbacks
      @after_request_callbacks ||= []
    end
  end

  extend DSL

  def request(req, body = nil, &block)
    start_time = Time.current
    super.tap do |resp|
      HttpLogger.after_request_callbacks.each do |callback|
        callback.call(http: self, request: req, response: resp, start_time: start_time)
      end
    end
  end
end

# The following can be put e.g. to Rails initializer.

HttpLogger.activate

HttpLogger.after_request do |http:, request:, response:, start_time:|
  request_duration = (Time.current - start_time).round(3)
  request_url =
    URI.decode("http#{"s" if http.use_ssl?}://#{http.address}:#{http.port}#{request.path}")

  Rails.logger.info(name: 'http_request',
                    method: request.method,
                    url: request_url,
                    status: response.code,
                    duration: request_duration)
end