内容长度:json响应Symfony2中为0 [英] Content length: 0 in a json response Symfony2

问题描述

总是空白，我在控制器中有一个动作，像这样

Always i get a blank, i have a action in my controller like this

/**
 * @Route("/check/{key}.json", defaults={"_format"="json"})
 * @Template()
 */
public function processAction($upload_key)
{
  /* make thing */
  return array('data' => $process_data);
}

在我拥有的process.json.twig文件中

in my process.json.twig file i have

{% set res = { 'data': data } %}
{{ res | json_enconde | raw }}

其他形式

{{ { 'data': data } | json_enconde | raw }}

我也尝试过这种方法:

{{ 'hello' | json_encode | raw }}

在Chrome浏览器中，我收到以下答复:

in chrome i get this response:

Connection:close
Content-Length:0
Content-Type:application/json
Date:Mon, 19 Dec 2011 05:13:17 GMT
Server:Apache/2.2.20 (Ubuntu)
X-Powered-By:PHP/5.3.6-13ubuntu3.3

从服务器上什么也收不到，我解决不了

and get nothing from the server, i cant solve this

推荐答案

有两种方法可以实现此目标，这取决于您更喜欢哪个，以及您的操作是否应该支持多种_format类型.

There are two ways to achieve this, it depends on which you prefer and whether or not your action is supposed to support multiple _format types.

选项A-仅返回JSON的操作

您可以完全绕过模板.

在您的控制器中，删除@Template批注，而改为return new Response(json_encode($process_data));

In your controller remove the @Template annotation and instead return new Response(json_encode($process_data));

选项B-一种支持不同格式的操作，或者您只希望在模板中呈现JSON

通过呈现不同格式的动作，我指的是具有路线的动作:

By an action that renders different formats I refer to an action with a route as so:

@Route("/check/{key}.{_format}", defaults={"_format"="json"}
@Template

尽管此问题中的控制器遵循仅支持JSON但您希望在模板中呈现的动作"的路径.

Although a controller in this question goes down the route of "an action that only supports JSON but you want to render it in a template".

假设控制器的processAction根据问题要求返回return array('data' => $process_data);，然后将其渲染为JSON并在名为process.json.twig的模板中进行，请按照以下说明进行操作{{ data|json_encode }}，无需进行预处理data或将其转换为另一个数组或模板中的类似内容.

Assuming the controller's processAction returns return array('data' => $process_data); as the question asks then rendering this as JSON inside a template called process.json.twig should be done as follows {{ data|json_encode }}, there is no need to pre-process data or turn it into another array or anything like that inside the template.

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