Sinatra on GAE

app.rb

require 'rubygems'
require 'sinatra'

get '/' do
  'Hello World!!'
end

appengine-web.xml

<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
    <application>sinatra_on_gae</application>
    <version>1</version>
    <static-files />
    <resource-files />
    <sessions-enabled>false</sessions-enabled>
    <system-properties>
      <property name="jruby.management.enabled" value="false" />
      <property name="os.arch" value="" />
      <property name="jruby.compile.mode" value="JIT"/> <!-- JIT|FORCE|OFF -->
      <property name="jruby.compile.fastest" value="true"/>
      <property name="jruby.compile.frameless" value="true"/>
      <property name="jruby.compile.positionless" value="true"/>
      <property name="jruby.compile.threadless" value="false"/>
      <property name="jruby.compile.fastops" value="false"/>
      <property name="jruby.compile.fastcase" value="false"/>
      <property name="jruby.compile.chainsize" value="500"/>
      <property name="jruby.compile.lazyHandles" value="false"/>
      <property name="jruby.compile.peephole" value="true"/>
   </system-properties>
</appengine-web-app>

gistfile4.sh

cd sinatra_on_gae
mkdir WEB-INF
mkdir WEB-INF/gems WEB-INF/lib

gistfile5.sh

gem install -i WEB-INF/gems sinatra --no-rdoc --no-ri
rm -rf WEB-INF/gems/bin WEB-INF/gems/cache/*

sinatra.rb

libdir = File.dirname(__FILE__)
$LOAD_PATH.unshift(libdir) unless $LOAD_PATH.include?(libdir)

require 'sinatra/base'
require 'sinatra/main'
require 'sinatra/compat'

# This should comment out!!
#use_in_file_templates!

web.xml

<!DOCTYPE web-app PUBLIC
  "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
  "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>

  <context-param>
    <param-name>public.root</param-name>
    <param-value>/</param-value>
  </context-param>

  <context-param>
    <param-name>rackup</param-name>
    <param-value>require 'rubygems'
require 'sinatra'
 
root_dir = File.dirname(__FILE__)
 
#set :environment, :production
set :environment, :development
set :root,        root_dir
set :app_file,    File.join(root_dir, 'app.rb')
disable :run
 
require 'app'
 
run Sinatra::Application
</param-value>
  </context-param>

  <context-param>
    <param-name>jruby.min.runtimes</param-name>
    <param-value>1</param-value>
  </context-param>

  <context-param>
    <param-name>jruby.max.runtimes</param-name>
    <param-value>1</param-value>
  </context-param>

  <context-param>
    <param-name>jruby.init.serial</param-name>
    <param-value>true</param-value>
  </context-param>

  <filter>
    <filter-name>RackFilter</filter-name>
    <filter-class>org.jruby.rack.RackFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>RackFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <listener>
    <listener-class>org.jruby.rack.RackServletContextListener</listener-class>
  </listener>

</web-app>