swoft 学习笔记之 response 篇

一、响应对象 response

响应对象 Response 为 Swoft\Http\Message\Response

查看 response 对象源码，文件路径为 vendor/swoft/http-message/src/Response.php

class Response implements ResponseInterface
{
    use CookiesTrait, MessageTrait, PrototypeTrait;

    .
    .
    .
}

可知 response 对象实现了 ResponseInterface 接口，另外引用 CookiesTrait, MessageTrait, PrototypeTrait 三个trait

二、响应对象 response 的获取

• 通过控制器方法注入

• 通过请求上下文获取

  <?php declare(strict_types=1);
  namespace App\Http\Controller;
  use Swoft\Context\Context;
  use Swoft\Http\Message\ContentType;
  use Swoft\Http\Message\Request;
  use Swoft\Http\Message\Response;
  use Swoft\Http\Server\Annotation\Mapping\Controller;
  use Swoft\Http\Server\Annotation\Mapping\RequestMapping;
  /**
  * Class TestController
  * @package App\Http\Controller
  * @Controller(prefix="test")
  */
  class TestController
  {
      /**
       * @RequestMapping(route="index")
       * @param Request $request
       * @return Response
       */
      public function index(Request $request) : Response
      {
          $path    = $request->getUriPath();
          $headers = $request->getHeaders();
  
          $data    = [
              'path'    => $path,
              'headers' => $headers,
          ];
  
          $headers = [
              'token' => 'akdhfheiwoadskajkdjoihh=ahdiu0-2hds',
          ];
          $response = Context::mustGet()->getResponse();
          return $response->withStatus(200)
              ->withContentType(ContentType::JSON)
              ->withHeaders($headers)
              ->withData($data);
      }
  
      /**
       * @RequestMapping(route="test")
       * @param Request $request
       * @param Response $response
       * @return Response
       */
      public function test(Request $request,Response $response)
      {
          return $response->withData(['name'=>'swoft']);
      }   
  }

三、返回响应信息

设置状态码

    $response = \Swoft\Context\Context::mustGet()->Response();
    return $response->withStatus(403);

输出字符串

    return $response->withContent("Hello World");

输出数组

    $data = ['name'=>'swoft'];
    return $response->withData($data);

输出头信息

    $headers = ['token'=>'dhsjagfuigfiugu=-dsah=dsaj'];
    return $response->withHeaders($headers);

重定向

    return $response->redirect("http://www.swoft.org",302);

文件下载

    return $response->file(\alias('@runtime/1.zip'), "application/octet-stream");

设置 cookie

    $response = $response->withCookie(’name', 'value');

    $cookies = [
        'key1' => 'value1',
        'key2' => ['value' => 'value2'],
    ];
    $response = $response->withCookies($cookies);

其他方法

还有很多方法，比如设置返回数据 Json 类型等，在这里就不一一罗列了，可以查看源代码或者官方文档查看，另外注意 is 开头的方法，有助于理解标准的 http 状态码的意义。

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