77 lines
3.1 KiB
PHP
77 lines
3.1 KiB
PHP
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<?php
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namespace App\Http\Middleware\Api;
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use App\Jobs\Api\SaveLastTokenJob;
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use Auth;
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use Closure;
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use Tymon\JWTAuth\Exceptions\JWTException;
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use Tymon\JWTAuth\Exceptions\TokenInvalidException;
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use Tymon\JWTAuth\Facades\JWTAuth;
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use Tymon\JWTAuth\Http\Middleware\BaseMiddleware;
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use Tymon\JWTAuth\Exceptions\TokenExpiredException;
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use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
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// 注意，我们要继承的是 jwt 的 BaseMiddleware
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class RefreshTokenMiddleware extends BaseMiddleware
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{
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/**
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* Handle an incoming request.
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*
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* @param \Illuminate\Http\Request $request
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* @param \Closure $next
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*
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* @throws \Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException
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*
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* @return mixed
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*/
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public function handle($request, Closure $next)
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{
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// 检查此次请求中是否带有 token，如果没有则抛出异常。
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$this->checkForToken($request);
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//1. 格式通过，验证是否是专属于这个的token
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//获取当前守护的名称
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$present_guard = Auth::getDefaultDriver();
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//获取当前token
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$token=Auth::getToken();
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//即使过期了，也能获取到token里的 载荷 信息。
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$payload = Auth::manager()->getJWTProvider()->decode($token->get());
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//如果不包含guard字段或者guard所对应的值与当前的guard守护值不相同
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//证明是不属于当前guard守护的token
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if(empty($payload['guard'])||$payload['guard']!=$present_guard){
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throw new TokenInvalidException();
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}
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//使用 try 包裹，以捕捉 token 过期所抛出的 TokenExpiredException 异常
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//2. 此时进入的都是属于当前guard守护的token
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try {
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// 检测用户的登录状态，如果正常则通过
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if ($this->auth->parseToken()->authenticate()) {
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return $next($request);
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}
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throw new UnauthorizedHttpException('jwt-auth', '未登录');
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} catch (TokenExpiredException $exception) {
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// 此处捕获到了 token 过期所抛出的 TokenExpiredException 异常，我们在这里需要做的是刷新该用户的 token 并将它添加到响应头中
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try {
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// 刷新用户的 token
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$token = $this->auth->refresh();
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// 使用一次性登录以保证此次请求的成功
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Auth::onceUsingId($this->auth->manager()->getPayloadFactory()->buildClaimsCollection()->toPlainArray()['sub']);
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//刷新了token，将token存入数据库
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$user = Auth::user();
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SaveLastTokenJob::dispatch($user,$token);
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} catch (JWTException $exception) {
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// 如果捕获到此异常，即代表 refresh 也过期了，用户无法刷新令牌，需要重新登录。
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throw new UnauthorizedHttpException('jwt-auth', $exception->getMessage());
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}
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}
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// 在响应头中返回新的 token
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return $this->setAuthenticationHeader($next($request), $token);
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}
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}
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