Conexión sin Parámetros

Partimos del mismo código fuente que en la sección anterior:

[~/local/src/ruby/sinatra/rack/rack-debugging]$ cat hello.rb 
require 'rack'
require 'pry-debugger'

class HelloWorld
  def call env
    binding.pry
    [200, {"Content-Type" => "text/plain"}, ["Hello world"]]
  end
end

Arranquemos un servidor dentro de pry:

[~/local/src/ruby/sinatra/rack/rack-debugging]$ pry
[1] pry(main)> require './hello'
=> true
[2] pry(main)> Rack::Handler::WEBrick::run HelloWorld.new
[2013-09-23 13:10:42] INFO  WEBrick 1.3.1
[2013-09-23 13:10:42] INFO  ruby 1.9.3 (2013-02-22) [x86_64-darwin11.4.2]
[2013-09-23 13:10:42] INFO  WEBrick::HTTPServer#start: pid=10395 port=8080

Si visitamos la página:

$ curl -v localhost:8080/jkdfkdjg

Esto hace que se alcance el break:

From: /Users/casiano/local/src/ruby/sinatra/rack/rack-debugging/hello.rb @ line 6 HelloWorld#call:

    5: def call env
 => 6:   binding.pry
    7:   [200, {"Content-Type" => "text/plain"}, ["Hello world"]]
    8: end

Ahora creamos un objeto Rack::Request:

[3] pry(#<HelloWorld>)> req = Rack::Request.new(env)
=> #<Rack::Request:0x007fbba4ff3298
 @env=
  {"GATEWAY_INTERFACE"=>"CGI/1.1",
   "PATH_INFO"=>"/jkdfkdjg",
   "QUERY_STRING"=>"",
   "REMOTE_ADDR"=>"::1",
   "REMOTE_HOST"=>"localhost",
   "REQUEST_METHOD"=>"GET",
   "REQUEST_URI"=>"http://localhost:8080/jkdfkdjg",
   "SCRIPT_NAME"=>"",
   "SERVER_NAME"=>"localhost",
   "SERVER_PORT"=>"8080",
   "SERVER_PROTOCOL"=>"HTTP/1.1",
   "SERVER_SOFTWARE"=>"WEBrick/1.3.1 (Ruby/1.9.3/2013-02-22)",
   "HTTP_USER_AGENT"=>
    "curl/7.21.4 (universal-apple-darwin11.0) libcurl/7.21.4 OpenSSL/0.9.8y zlib/1.2.5",
   "HTTP_HOST"=>"localhost:8080",
   "HTTP_ACCEPT"=>"*/*",
   "rack.version"=>[1, 2],
   "rack.input"=>#<StringIO:0x007fbba4e74980>,
   "rack.errors"=>#<IO:<STDERR>>,
   "rack.multithread"=>true,
   "rack.multiprocess"=>false,
   "rack.run_once"=>false,
   "rack.url_scheme"=>"http",
   "HTTP_VERSION"=>"HTTP/1.1",
   "REQUEST_PATH"=>"/jkdfkdjg"}>

Este objeto Rack::Request tiene métodos para informarnos del Rack::Request:

[4] pry(#<HelloWorld>)> req.get?
=> true
[5] pry(#<HelloWorld>)> req.post?
=> false
[7] pry(#<HelloWorld>)> req.port
=> 8080
[12] pry(#<HelloWorld>)> req.host()
=> "localhost"
[13] pry(#<HelloWorld>)> req.host_with_port()
=> "localhost:8080"
[15] pry(#<HelloWorld>)> req.path()
=> "/jkdfkdjg"
[18] pry(#<HelloWorld>)> req.url()
=> "http://localhost:8080/jkdfkdjg"
[19] pry(#<HelloWorld>)> req.user_agent
=> "curl/7.21.4 (universal-apple-darwin11.0) libcurl/7.21.4 OpenSSL/0.9.8y zlib/1.2.5"