ISUCON4予選問題をngx_mrubyだけで解いてみた（ノウハウ編） ref: http://qiita.com/Marcy/items/1a7ab35970c31d169bf8

example1.rb

r = Nginx::Request.new
Nginx.echo r.args #=> "id=hoge&name=fuga"

example2.rb

r = Nginx::Request.new
Nginx.echo r.var.request_body #=> "login=hoge&password=fuga"

example3.rb

r = Nginx::Request.new
Nginx.echo r.var.http_cookie #=> "login=hoge&password=fuga"

example4.rb

year = Time.now.year - 1

r = Nginx::Request.new
r.headers_out['Set-Cookie'] = "notice=+; expires=Mon, 25-Nov-#{year} 11:11:11 GMT; path=/"

example5.rb

p Time.now.strftime("%Y-%m-%d %H:%M:%S") #=> "2014-12-05 00:11:22" 

example6.rb

year  = Time.now.year
month = Time.now.month
day   = Time.now.day
hour  = Time.now.hour
min   = Time.now.min
sec   = Time.now.sec

month = month < 10 ? "0#{month.to_s}" : month.to_s
day   = day   < 10 ? "0#{day.to_s}"   : day.to_s
hour  = hour  < 10 ? "0#{hour.to_s}"  : hour.to_s
min   = min   < 10 ? "0#{min.to_s}"   : min.to_s
sec   = sec   < 10 ? "0#{sec.to_s}"   : sec.to_s

Nginx.echo "#{year}-#{month}-#{day} #{hour}:#{min}:#{sec}" #=> "2014-12-05 00:11:22"

example7.rb

r = Nginx::Request.new
r.headers_out["Location"] = "http://#{r.var.http_host}/mypage"
Nginx.return Nginx::HTTP_MOVED_TEMPORARILY

file1.rb

v = Nginx::Var.new

v.arg_name #=> "matsumotory"
v.arg_id #=> 0

nginx.conf

set_form_input $login;
set_form_input $password;