如何让Laravel Fortify密码确认路由返回预期JSON响应

Fortify 中PasswordConfirmedResponse、FailedPasswordConfirmationResponse两个空接口本身就是预留的自定义扩展点，不需要重写控制器、覆盖默认路由，直接通过容器绑定自定义实现即可满足JSON返回需求，具体操作如下：

• 第一步：创建自定义响应类
  在app/Http/Responses目录下新建两个响应类，分别实现Fortify提供的对应契约接口，在toResponse方法中判断请求类型，区分返回JSON或页面跳转响应：
  1. 密码确认成功响应类

  <?php
  
  namespace App\Http\Responses;
  
  use Illuminate\Http\JsonResponse;
  use Laravel\Fortify\Contracts\PasswordConfirmedResponse as ConfirmResponseContract;
  
  class PasswordConfirmedResponse implements ConfirmResponseContract
  {
      public function toResponse($request)
      {
          return $request->wantsJson()
              ? new JsonResponse(['message' => '密码验证通过'], 200)
              : back()->with('status', 'password-confirmed');
      }
  }
  

  2. 密码确认失败响应类

  <?php
  
  namespace App\Http\Responses;
  
  use Illuminate\Http\JsonResponse;
  use Illuminate\Validation\ValidationException;
  use Laravel\Fortify\Contracts\FailedPasswordConfirmationResponse as FailedConfirmContract;
  
  class FailedPasswordConfirmationResponse implements FailedConfirmContract
  {
      public function toResponse($request)
      {
          $errorMsg = '输入的密码与当前账户密码不匹配';
  
          if ($request->wantsJson()) {
              throw ValidationException::withMessages([
                  'password' => [$errorMsg]
              ]);
          }
  
          return back()
              ->withInput($request->only('password'))
              ->withErrors(['password' => $errorMsg]);
      }
  }
  

• 第二步：绑定接口到自定义实现
  打开app/Providers/FortifyServiceProvider.php，在boot方法中添加容器绑定逻辑，将Fortify默认的响应契约指向你刚写的自定义类：

  <?php
  
  namespace App\Providers;
  
  use App\Http\Responses\FailedPasswordConfirmationResponse;
  use App\Http\Responses\PasswordConfirmedResponse;
  use Illuminate\Support\ServiceProvider;
  use Laravel\Fortify\Contracts\FailedPasswordConfirmationResponse as FailedContract;
  use Laravel\Fortify\Contracts\PasswordConfirmedResponse as ConfirmContract;
  
  class FortifyServiceProvider extends ServiceProvider
  {
      public function boot()
      {
          // 原有Fortify配置逻辑保留，比如Fortify::createUsersUsing()等
  
          $this->app->singleton(ConfirmContract::class, PasswordConfirmedResponse::class);
          $this->app->singleton(FailedContract::class, FailedPasswordConfirmationResponse::class);
      }
  }
  

完成以上配置后，/user/confirm-password路由会自动适配请求类型：普通页面请求保持原有跳转+闪存消息的逻辑，XHR/携带Accept: application/json头的请求会返回对应JSON格式结果，无需修改框架源码、无需覆盖默认路由定义。

内容的提问来源于stack exchange，提问作者liam-milbel