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FlashからデータをRailsに渡して、そのままデータをFlashへ返します。

Flash側

this.createTextField("r_txt",1,10,10,480,480);

this.r_txt.border = true

this.r_txt.text = "start";


var lv = new LoadVars();

var rlv = new LoadVars();

lv.data = "hoge"; // Rails側に送信するデータ

lv.sendAndLoad("http://localhost:3000/flash/hello/",rlv,"POST");

rlv.target = this;

rlv.onLoad = function (s:Boolean){

    if (s) {

        this.target.r_txt.text = "result = " + this.result;

    } else {

        this.target.r_txt.text = "error";

    }

};

Rails側

$ ruby script/generate controller flash

flash_controller.rb

class FlashController < ApplicationController

  def hello

    @data = @params["data"]

  end

end

hello.rhtml

result=<%= @data %>