package controllers

import (
    "github.com/astaxie/beego"
    "github.com/astaxie/beego/cache"
    "github.com/astaxie/beego/utils/captcha"
)

var cpt *captcha.Captcha

func init() {
    // use beego cache system store the captcha data
    store := cache.NewMemoryCache()
    cpt = captcha.NewWithFilter("/captcha/", store)
}

type MainController struct {
    beego.Controller
}

func (this *MainController) Get() {
    this.TplName = "index.tpl"
}

func (this *MainController) Post() {
    this.TplName = "index.tpl"

    this.Data["Success"] = cpt.VerifyReq(this.Ctx.Request)
}

{{.Success}}
<form action="/" method="post">
    {{create_captcha}}
    <input name="captcha" type="text">
</form>