中介軟體有：1、Authenticate；2、CheckForMaintenanceMode；3、EncryptCookies；4、RedirectIfAuthenticated；5、TrimStrings；6、TrustProxies等等。
本教學操作環境：windows7系統、Laravel6版、Dell G3電腦。
Laravel自帶的中間件
Laravel 自帶了一些中間件，包括身份驗證、CSRF 保護等。 Laravel 具體啟用了哪些中間件，可透過 app\Http\Kernel.php 檔案查看。對於以 \App\Http\Middleware\ 開頭的中間件（位於 app/Http/Middleware 目錄）是我們可以對其行為進行自訂的中間件。
Authenticate 中間件
來源檔：app\Http\Middleware\Http\Middleware\Authenticate.php
<?php
namespace App\Http\Middleware;
use Illuminate\Auth\Middleware\Authenticate as Middleware;
class Authenticate extends Middleware
{
/**
* Get the path the user should be redirected to when they are not authenticated.
*
* @param \Illuminate\Http\Request $request
* @return string
*/
protected function redirectTo($request)
{
if (! $request->expectsJson()) {
return route('login');
}
}
}作用：
使用者身份驗證。可修改 redirectTo 方法，傳回未經驗證的使用者應該重定向到的路徑。
CheckForMaintenanceMode 中間件
來源檔案：app\Http\Middleware\CheckForMaintenanceMode.php
<?php
namespace App\Http\Middleware;
use Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode as Middleware;
class CheckForMaintenanceMode extends Middleware
{
/**
* The URIs that should be reachable while maintenance mode is enabled.
*
* @var array
*/
protected $except = [
//
];
}作用：
偵測項目是否處於維護模式。可透過 $except 數組屬性設定在維護模式下仍能存取的網址。
EncryptCookies 中間件
來源檔案：app\Http\Middleware\EncryptCookies.php
<?php
namespace App\Http\Middleware;
use Illuminate\Cookie\Middleware\EncryptCookies as Middleware;
class EncryptCookies extends Middleware
{
/**
* The names of the cookies that should not be encrypted.
*
* @var array
*/
protected $except = [
//
];
}作用
對Cookie 進行加解密處理與驗證。可透過 $except 數組屬性設定不做加密處理的 cookie。
RedirectIfAuthenticated 中間件
來源檔：app\Http\Middleware\RedirectIfAuthenticated.php
<?php
namespace App\Http\Middleware;
use Closure;
use Illuminate\Support\Facades\Auth;
class RedirectIfAuthenticated
{
/**
* Handle an incoming request.
*
* @param \Illuminate\Http\Request $request
* @param \Closure $next
* @param string|null $guard
* @return mixed
*/
public function handle($request, Closure $next, $guard = null)
{
if (Auth::guard($guard)->check()) {
return redirect('/home');
}
return $next($request);
}
}作用：
當請求頁是註冊、登入、忘記密碼時，偵測使用者是否已經登錄，如果已經登錄，那麼就重新導向到首頁，如果沒有就開啟對應介面。可以在 handle 方法中自訂重定向到的路徑。
TrimStrings 中間件
來源檔：app\Http\Middleware\TrimStrings.php
<?php
namespace App\Http\Middleware;
use Illuminate\Foundation\Http\Middleware\TrimStrings as Middleware;
class TrimStrings extends Middleware
{
/**
* The names of the attributes that should not be trimmed.
*
* @var array
*/
protected $except = [
'password',
'password_confirmation',
];
}作用：
對請求參數內容進行前後空白字元清理。可透過 $except 陣列屬性設定不做處理的參數。
TrustProxies 中間件
原始檔：app\Http\Middleware\TrustProxies.php##
<?php
namespace App\Http\Middleware;
use Illuminate\Http\Request;
use Fideloper\Proxy\TrustProxies as Middleware;
class TrustProxies extends Middleware
{
/**
* The trusted proxies for this application.
*
* @var array|string
*/
protected $proxies;
/**
* The headers that should be used to detect proxies.
*
* @var int
*/
protected $headers = Request::HEADER_X_FORWARDED_ALL;
}VerifyCsrfToken 中間件
來源檔：app\Http\Middleware\VerifyCsrfToken.php#
<?php
namespace App\Http\Middleware;
use Illuminate\Foundation\Http\Middleware\VerifyCsrfToken as Middleware;
class VerifyCsrfToken extends Middleware
{
/**
* Indicates whether the XSRF-TOKEN cookie should be set on the response.
*
* @var bool
*/
protected $addHttpCookie = true;
/**
* The URIs that should be excluded from CSRF verification.
*
* @var array
*/
protected $except = [
//
];
}相關推薦：#
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