paul

require 'active_support/time_with_zone'
class ActiveSupport::TimeWithZone
  def to_json(options = nil)
    utc.xmlschema.to_json
  end
end

module Jrb

paul

 $ ruby split_vs_regex.rb
                user     system      total        real
split       9.080000   0.020000   9.100000 (  9.081937)
regex       9.810000   0.010000   9.820000 (  9.810586)

paul

Filtered Metrics

GET /metrics?hostname=example.com&any_part[]=cpu&any_part[]=load
{
  latest_datapoints_href: "http://tychoapp.com/metrics/datapoints/latest?hostname=example.com&any_part[]=cpu&any_part[]=load",
  datapoints_for_interval_href: "http://tychoapp.com/metrics/datapoints?hostname=example.com&any_part[]=cpu&any_part[]=load",
  items: [

{

paul

GET /metrics?hostname=example.com&any_part[]=cpu&any_part[]=load
{
  latest_datapoints_href: "http://tychoapp.com/metrics/datapoints/latest?hostname=example.com&any_part[]=cpu&any_part[]=load",
  datapoints_for_interval_href: "http://tychoapp.com/metrics/datapoints?hostname=example.com&any_part[]=cpu&any_part[]=load",
  items: [
    {
      href: "http://tychoapp.com/metrics/example.com/cpu/0/idle",

name: "example.com/cpu/0/idle"

paul

require 'benchmark'

class Dummy

  attr_writer :setter

  def orig(att, value)
    send("#{att}=", value) if respond_to?("#{att}=")
  end

paul

require 'yajl'

module Ssaj

  PARSER = Proc.new do |data|
    HashWithIndifferentAccess.new(Yajl::Parser.parse(data))
  end

  ActionDispatch::ParamsParser::DEFAULT_PARSERS[Mime::SSAJ1] = PARSER

paul

>> Regexp.compile('(')
RegexpError: premature end of regular expression: /(/
	from (irb):13:in `initialize'
	from (irb):13:in `compile'
	from (irb):13
	from :0

>> Regexp.compile('foo{1|2}')
(irb):14: warning: regexp has invalid interval
(irb):14: warning: regexp has `}' without escape

paul

 $ irb
>> require 'active_support/core_ext/numeric/time'
=> true
>> 1.hour.ago
NoMethodError: undefined method `current' for Time:Class
	from /Users/rando/.rvm/gems/ree-1.8.7-2011.03@core/gems/activesupport-3.0.5/lib/active_support/duration.rb:68:in `ago'
	from (irb):2
>> require 'active_support/core_ext/time/calculations'
=> true
>> 1.hour.ago

paul

HTTP Client bug in Chrome (and Safari)

We have a resource, /clients, that serves up both html and a custom json flavor, ssjk1. We set the response Vary header to include Accept. If we first request the resource as sskj1 then sometime later as the normal browser Accept header (*/*), we should get html. However, Chrome (and Safari) make a conditional HTTP request with If-Modified-Since.

Chromium Issue

paul

# Using javascript to tell the browser to make a web service request (sskj1)

GET /clients HTTP/1.1
Accept-Charset: UTF-8,*;q=0.5
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept: application/vnd.absperf.sskj1+json, application/vnd.absperf.ssmj1+json
Cache-Control: max-age=0
Connection: keep-alive
Cookie: ssbe_current_account=...