Convert POST parameters to hash in Ruby without rails

What's the best library to use to convert the HTTP POST string received from a browser into a Ruby hash? I don't want to use the large rails-based libraries. I am using eventmachine and evma_ht开发者_JAVA技巧tpserver, and want to include the lightest library possible that will decode and convert the params string.

Note: I don't need a webserver. I have the encoded post string in hand, and just need to convert it to a hash.

URI.decode_www_form from the Ruby standard library can do this: http://rubydoc.info/docs/ruby-stdlib/1.9.2/URI#decode_www_form-class_method

You could use the rack gem for its Rack::Utils.parse_query method.

If you want lighter than that, you could just copy the source code to the parse_query and unescape methods from it.

If you want event lighter (but perhaps not as performant or robust) than that, just implement your own split and lean on CGI.unescape.

Try this:

require "uri"    
result = URI.decode_www_form("your=post&params=values").inject({}) {|r, (key,value)| r[key.to_sym] = value;r}

puts result[:your]
puts result[:params]