class AccessWatch::RackLogger

Constants

MEMORY_CONVERSIONS

Attributes

app[R]
client[R]

Public Class Methods

new(app, config) click to toggle source
# File lib/access_watch/rack_logger.rb, line 5
def initialize(app, config)
  @app, @client = app, AccessWatch::Client.new(config)
end

Public Instance Methods

call(env) click to toggle source
# File lib/access_watch/rack_logger.rb, line 9
def call(env)
  started_at = Time.now.utc
  status, headers, body = app.call(env)
  record(env, status, started_at, Time.now.utc)
  [status, headers, body]
end
record(env, status, started_at, finished_at) click to toggle source
# File lib/access_watch/rack_logger.rb, line 16
def record(env, status, started_at, finished_at)
  post_request(
    time: started_at.iso8601(3),
    address: env["REMOTE_ADDR"],
    request: {
      protocol: env["HTTP_VERSION"],
      method: env["REQUEST_METHOD"],
      scheme: env["rack.url_scheme"],
      host: env["HTTP_HOST"],
      port: env["SERVER_PORT"],
      url: env["ORIGINAL_FULLPATH"],
      headers: extract_http_headers(env),
    },
    response: {status: status},
    context: {
      execution_time: finished_at - started_at,
      memory_usage: memory_usage_in_bytes,
    },
  )
end

Private Instance Methods

extract_http_headers(headers) click to toggle source

Private methods ###

# File lib/access_watch/rack_logger.rb, line 43
def extract_http_headers(headers)
  headers.reduce({}) do |hash, (name, value)|
    if name.index("HTTP_") == 0 && name != "HTTP_COOKIE"
      hash[format_header_name(name)] = value
    end
    hash
  end
end
format_header_name(name) click to toggle source
# File lib/access_watch/rack_logger.rb, line 52
def format_header_name(name)
  name.sub(/^HTTP_/, '').gsub("_", " ").titleize.gsub(" ", "-")
end
linux_process_memory_usage_in_bytes(pid) click to toggle source
# File lib/access_watch/rack_logger.rb, line 80
def linux_process_memory_usage_in_bytes(pid)
  return unless status = linux_process_status(pid)
  value, unit = status["VmRSS"].split
  value.to_i * MEMORY_CONVERSIONS[unit.downcase]
end
linux_process_status(pid) click to toggle source
# File lib/access_watch/rack_logger.rb, line 68
def linux_process_status(pid)
  path = "/proc/#{pid}/status"
  return unless File.readable?(path)
  File.read(path).split("\n").reduce({}) do |hash, line|
    name, value = line.split(":")
    hash[name] = value.strip
    hash
  end
end
memory_usage_in_bytes() click to toggle source
# File lib/access_watch/rack_logger.rb, line 64
def memory_usage_in_bytes
  linux_process_memory_usage_in_bytes(Process.pid)
end
post_async(path, data) click to toggle source
# File lib/access_watch/rack_logger.rb, line 60
def post_async(path, data)
  Thread.new { client.post(path, data) }
end
post_request(data) click to toggle source
# File lib/access_watch/rack_logger.rb, line 56
def post_request(data)
  post_async("log".freeze, data)
end