runscala.user.js

// ==UserScript==
// @name           run scala
// @namespace      http://orezdnu.org/
// @include        http://*.g.hatena.ne.jp/*
// ==/UserScript==

(function(lang, url) {
    var list = document.getElementsByTagName('pre');
    for (var i=0; i < list.length; i++) {
        var pre = list[i];
        var div = document.createElement('div');
        var btn = document.createElement('div');
        btn.style.position = 'absolute'; btn.style.zIndex = 1000;
        btn.style.backgroundColor = '#ffccdd';
        btn.style.width = '12px'; btn.style.height = '12px';
        btn.addEventListener('click', (function(i, node) { return function() {
            var wait = document.createElement('img');
            wait.src = 'http://b.hatena.ne.jp/images/loading.gif';
            node.nextSibling ?
                node.parentNode.insertBefore(wait, node.nextSibling) :
                node.parentNode.appendChild(wait);
            GM_xmlhttpRequest({
                method: 'POST',
                url: url,
                data: lang + "\n" + node.textContent,
                headers: {
                    'User-Agent': 'monkey',
                    'Accept': 'text/html,text/plain'
                },
                onload: function(r) {
                    var div = document.createElement('div');
                    var pre = document.createElement('pre');
                    pre.appendChild(document.createTextNode(r.responseText));
                    div.appendChild(pre);
                    wait.parentNode.replaceChild(div, wait);
                }
            });
        }; })(i, pre), false);
        pre.parentNode.replaceChild(div, pre);
        div.appendChild(btn);
        div.appendChild(pre);
    }
})('scala', 'http://localhost:8080/?'+Date.now());

server.rb

#! /usr/bin/env ruby

require 'logger'
require 'webrick'
require 'yaml'

class IO
  def read_interactive
    sleep(0.3)
    ret = ''
    begin
      ret += read_nonblock(1) while true
    rescue EOFError
    rescue Errno::EAGAIN
    end
    return ret
  end
end

conffile = ARGV[0]
conf = {
  :BindAddress => '0.0.0.0',
  :Port        => 8080,
}
if conffile && conffile
  conf.merge!(YAML.load_file(conffile))
  if conf[:logfile]
    loglevel = conf[:loglevel] || Logger::INFO
    conf[:Logger] = WEBrick::Log.new(conf[:logfile], conf[:loglevel])
  end
end

srv = WEBrick::HTTPServer.new(conf)

srv.mount_proc('/') do |req, res|
  if req.body
    cmd, body = req.body.split("\n", 2)
    body = body.chomp + "\n"
    srv.logger.info(cmd)
    srv.logger.info(body)
    res.content_type = 'text/plain; charset=utf-8'
    res.status = WEBrick::HTTPStatus::RC_OK
    res.body = ''
    IO.popen(cmd, 'r+') do |io|
      sleep(1.5)
      res.body += io.read_interactive
      body.each_line do |line|
        io.puts(line.chomp)
        res.body += io.read_interactive
      end
    end
  else
    res.status = WEBrick::HTTPStatus::RC_NOT_FOUND
  end
  srv.logger.info(res.body)
end

srv.mount_proc('/test') do |req, res|
  res.content_type = 'text/plain; charset=utf-8'
  res.status = WEBrick::HTTPStatus::RC_OK
  res.body = 'OK!'
end

srv.mount_proc('/stop') do |req, res|
  srv.stop
  res.content_type = 'text/plain; charset=utf-8'
  res.status = WEBrick::HTTPStatus::RC_OK
  res.body = 'stopped'
end

srv.start