Installation:

$ sudo gem install xml-sitemap

Example

pages = Page.all(:order => [:updated_at.desc] # DM model
map = XmlSitemap::Map.new('somedomain.com') do |m|
  m.add(:url => '/', :period => :daily, :priority => 1.0)
  m.add(:url => '/contractors', :period => :daily, :priority => 1.0)
  pages.each do |p|
    m.add(
      :url => url_for_page(p),
      :updated => p.updated_at,
      :priority => 0.5,
      :period => :never
    )
  end
end
# render the sitemap
puts map.render

Sinatra Example

# ... your code
 
get '/sitemap.xml' do
  map = XmlSitemap::Map.new('domain.com') do |m|
    m.add(:url => '/')
    m.add(:url => '/posts', :period => :weekly)
  end
 
  headers['Content-Type'] = 'text/xml'
  map.render
end
 
# ... more code

Options

:url – page path, relative to domain (ex.: /test), String.
:period – freqchange attribute, Symbol, :none, :never, :always, :hourly, :daily, :weekly, :monthly, :yearly
:priority – priority attribute, Float class,(0.0..1.0)
:updated – (optional) last_update attribute, Time class

Source Code

http://github.com/sosedoff/xml-sitemap

$ touch /usr/bin/fake-sendmail.sh 
$ chmod +x /usr/bin/fake-sendmail.sh  # make it executable (will require root priv.)

#!/usr/bin/ruby
path = "/tmp/fake-mailer"
Dir.mkdir(path) if !File.exists?(path)
File.open("#{path}/#{Time.now.to_i}.txt", "w") do |f|
    f.puts ARGV.inspect
    $stdin.each_line { |line| f.puts line }
end

And then configure your mailing system:

1. Sinatra

There is a plugin for Sinatra (ported from Merb, http://github.com/foca/sinatra-mailer),

Sinatra::Mailer.config = {:sendmail_path => "/usr/bin/fake-sendmail.sh"}
Sinatra::Mailer.delivery_method = :sendmail

2. Merb

Edit your development configuration file (config/environments/development.rb)

Merb::BootLoader.after_app_loads do
    Merb::Mailer.delivery_method = :sendmail
    Merb::Mailer.config = { :sendmail_path => '/usr/bin/fake-sendmail.sh' }
end

3. Rails.

Edit your development environment file with following options:

config.action_mailer.delivery_method = :sendmail 
config.action_mailer.sendmail_settings = {:location => "/usr/bin/fake-sendmail.sh"}

Basically, Merb/Sinatra uses thin (based on eventmachine) server module, so it is working as stand-alone application. So, there is a way to connect nginx with these applications. Very simple – all you need to proxy requests to backend server. And all static files will be served by nginx.

upstream your_app {
  server 127.0.0.1:YOUR_PORT_NUMBER;
}

server {
  server_name YOUR_SERVERNAME;
  listen 80;
  charset utf-8;
  client_max_body_size 64M; # maximum of proxied filesize (for uploads)

  location / {
    root /path/to/app/root;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect false;
    if (-f $request_filename) {
      break;
    }

    if (!-f $request_filename) {
      proxy_pass http://your_app;
      break;
    }
  }

  # static content (images, flash, styles, etc.)
  location ~* ^.+\.(jpg|jpeg|gif|png|ico|css|js|swf)$ {
    root /path/to/your/public/dir;
    access_log off;
  }
}

Then, all you need – start your application in daemon mode. Dont forget to bind application server to listen only on local address (127.0.0.1).