Collect nouns from HTTP POST data and get back as JSON array

to_nouns.rb

require 'natto'
require 'webrick'
require 'json'

def to_nouns(text)
    nm = Natto::MeCab.new
    results = []
    nm.parse(text) do |n|
        type = n.feature.split(/,/).first
        next unless type == '名詞'
        results.push n.surface
    end
    results
end

server = WEBrick::HTTPServer.new :Port => 1978
server.mount_proc '/' do |req, res|
    nouns = to_nouns req.body
    res.body = nouns.to_json
end
server.start