问题描述

我正在使用 FormRequest 来验证从我的 API 调用中发送的智能手机应用程序.所以，我希望 FormRequest 在验证失败时总是返回 json.

I'm using FormRequest to validate from which is sent in an API call from my smartphone app. So, I want FormRequest alway return json when validation fail.

看到如下Laravel框架的源码，如果reqeust是Ajax或者wantJson，FormRequest的默认行为是返回json.

I saw the following source code of Laravel framework, the default behaviour of FormRequest is return json if reqeust is Ajax or wantJson.

//IlluminateFoundationHttpFormRequest class
/**
 * Get the proper failed validation response for the request.
 *
 * @param  array  $errors
 * @return SymfonyComponentHttpFoundationResponse
 */
public function response(array $errors)
{
    if ($this->ajax() || $this->wantsJson()) {
        return new JsonResponse($errors, 422);
    }

    return $this->redirector->to($this->getRedirectUrl())
                                    ->withInput($this->except($this->dontFlash))
                                    ->withErrors($errors, $this->errorBag);
}

我知道我可以在请求标头中添加 Accept= application/json.FormRequest 将返回 json.但是我想提供一种更简单的方法来通过默认支持 json 来请求我的 API，而无需设置任何标头.所以，我试图在 IlluminateFoundationHttpFormRequest 类中找到一些强制 FormRequest 响应 json 的选项.但是我没有找到任何默认支持的选项.

I knew that I can add Accept= application/json in request header. FormRequest will return json. But I want to provide an easier way to request my API by support json in default without setting any header. So, I tried to find some options to force FormRequest response json in IlluminateFoundationHttpFormRequest class. But I didn't find any options which are supported in default.

我试图覆盖我的应用程序请求抽象类，如下所示:

I tried to overwrite my application request abstract class like followings:

<?php

namespace Laravel5CgHttpRequests;

use IlluminateFoundationHttpFormRequest;
use IlluminateHttpJsonResponse;

abstract class Request extends FormRequest
{
    /**
     * Force response json type when validation fails
     * @var bool
     */
    protected $forceJsonResponse = false;

    /**
     * Get the proper failed validation response for the request.
     *
     * @param  array  $errors
     * @return SymfonyComponentHttpFoundationResponse
     */
    public function response(array $errors)
    {
        if ($this->forceJsonResponse || $this->ajax() || $this->wantsJson()) {
            return new JsonResponse($errors, 422);
        }

        return $this->redirector->to($this->getRedirectUrl())
            ->withInput($this->except($this->dontFlash))
            ->withErrors($errors, $this->errorBag);
    }
}

我添加了 protected $forceJsonResponse = false; 来设置我们是否需要强制响应 json.并且，在从 Request 抽象类扩展的每个 FormRequest 中.我设置了那个选项.

I added protected $forceJsonResponse = false; to setting if we need to force response json or not. And, in each FormRequest which is extends from Request abstract class. I set that option.

例如:我创建了一个 StoreBlogPostRequest 并为此 FormRequest 设置了 $forceJsoResponse=true 并使其响应为 json.

Eg: I made an StoreBlogPostRequest and set $forceJsoResponse=true for this FormRequest and make it response json.

<?php

namespace Laravel5CgHttpRequests;

use Laravel5CgHttpRequestsRequest;

class StoreBlogPostRequest extends Request
{

    /**
     * Force response json type when validation fails
     * @var bool
     */

     protected $forceJsonResponse = true;
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'title' => 'required|unique:posts|max:255',
            'body' => 'required',
        ];
    }
}

解决方案 2:添加中间件并强制更改请求标头

我构建了一个如下所示的中间件:

Solution 2: Add an Middleware and force change request header

I build a middleware like followings:

namespace Laravel5CgHttpMiddleware;

use Closure;
use SymfonyComponentHttpFoundationHeaderBag;

class AddJsonAcceptHeader
{
    /**
     * Add Json HTTP_ACCEPT header for an incoming request.
     *
     * @param  IlluminateHttpRequest  $request
     * @param  Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        $request->server->set('HTTP_ACCEPT', 'application/json');
        $request->headers = new HeaderBag($request->server->getHeaders());
        return $next($request);
    }
}

这是工作.但我想知道这个解决方案好吗?在这种情况下，是否有任何 Laravel 方式可以帮助我?

It 's work. But I wonder is this solutions good? And are there any Laravel Way to help me in this situation ?

推荐答案

我很奇怪为什么在 Laravel 中很难做到这一点.最后，根据你重写Request类的想法，我想出了这个.

It boggles my mind why this is so hard to do in Laravel. In the end, based on your idea to override the Request class, I came up with this.

app/Http/Requests/ApiRequest.php

<?php

namespace AppHttpRequests;


class ApiRequest extends Request
{
    public function wantsJson()
    {
        return true;
    }
}

然后，在每个控制器中只通过 AppHttpRequestsApiRequest

Then, in every controller just pass AppHttpRequestsApiRequest

公共函数索引(ApiRequest $request)

这篇关于如何在 Laravel 5.1 中强制 FormRequest 返回 json?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！