symfony2 controller，symfony2

symfony2 controller，symfony2

1、基本概念

一次http请求    输入（Request）：header信息、get信息、post数据等

                     输出（Response）：symfony经过处理返回的信息，包括页面、json字符串、URL跳转等

2、Request

$this->getRequest()

httpie工具

HTTPie （读aych-tee-tee-pie）是一个 HTTP 的命令行客户端。其目标是让 CLI 和 web 服务之间的交互尽可能的人性化。

安装参考http://blog.csdn.net/pzw_0612/article/details/46521965

http://www.cnblogs.com/huangjacky/archive/2012/03/28/2421866.html

用httpie模拟表单提交（post）

>http -f post http:<span>//</span><span>localhost:8000/app_dev.php/page/test name=lily</span>

3、Response

<?<span>php

namespace Scource\WebBundle\Controller;

</span><span>use</span><span> Symfony\Bundle\FrameworkBundle\Controller\Controller;
</span><span>use</span><span> Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;</span><strong><span>use</span><span> Symfony\Component\HttpFoundation\Response;//注意不要引用错
</span></strong><span>use</span><span> Symfony\Component\HttpFoundation\JsonResponse;
</span><span>use</span><span> Symfony\Component\HttpFoundation\RedirectResponse;

</span><span>class</span> DefaultController <span>extends</span><span> Controller
{
    </span><span>/*</span><span>*
     * @Route("/page/test1")
     </span><span>*/</span>
    <span>public</span> <span>function</span><span> test1Action(){<br />　　　　 <span>//不使用模板，直接输出内容或者跳转
        </span></span><span>//</span><span>return new RedirectResponse('http://www.cnblogs.com/tianxintian22/');重定向
        //return new JsonResponse(array('a'=>'abcdef'));返回json串</span>
        <span>return</span> <span>new</span> Response('11111111111'<span>);
    }
}</span>

4、session

<span>$this</span>->getRequest()->getSession()->set('b', 'ni hao!'<span>);
</span><span>$this</span>->getRequest()->getSession()->get('b');

如果不能正确获取到session的值，可能是app/cache/dev目录下session的权限不对。

<span>//调用</span><span>flashmessage，只能显示一次就被抛弃，一般用在表单用户信息提示</span>
//php<br /><span>$this</span>->getRequest()->getSession()->getFlashBag()->add('notice','you have something wrong');<br /><br />//twig<br />{% for flashMessage in app.session.flashbag.get('notice') %}<br />    <div class="flash-notice"><br />        {{ flashMessage }}<br />    </div><br />{% endfor %}