NSURLConnection.rb

framework 'AppKit'

class Download
  attr_reader :response, :responseBody

  def start(request)
    puts "START!"
    NSURLConnection.connectionWithRequest(request, delegate:self)
  end

  def connection(connection, didReceiveResponse:response)
    @response = response
    @downloadData = NSMutableData.data
  end

  def connection(connection, didReceiveData:data)
    @downloadData.appendData(data)
  end

  def connectionDidFinishLoading(connection)
    case @response.statusCode
    when 200...300
      @responseBody = NSString.alloc.initWithData(@downloadData, encoding:NSUTF8StringEncoding)
      puts "Downloaded: #{@responseBody}"
    when 300...400
      puts "TODO: Handle redirect!"
    else
      puts "Oh noes, an error occurred: #{@response.statusCode}"
    end
    NSApplication.sharedApplication.terminate(self)
  end
end

# GET request:
#
request = NSMutableURLRequest.requestWithURL(NSURL.URLWithString("http://eekthecat.8m.com/"))

# POST request:
#
# postBody = "Current status: Kumbaya!"
# request.setHTTPMethod("POST")
# request.setHTTPBody(postBody.dataUsingEncoding(NSUTF8StringEncoding))

d = Download.new
d.start(request)

NSApplication.sharedApplication.run