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File / Folder	Size	Action
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CheckForMaintenanceMode...	0.136KB	edt ren
ConvertEmptyStringsToNu...	1.344KB	edt ren
HandlePrecognitiveReque...	2.392KB	edt ren
PreventRequestsDuringMa...	4.685KB	edt ren
TransformsRequest.php	2.047KB	edt ren
TrimStrings.php	1.646KB	edt ren
ValidatePostSize.php	1.193KB	edt ren
VerifyCsrfToken.php	5.914KB	edt ren

<?php

namespace Illuminate\Foundation\Http\Middleware;

use Closure;
use Illuminate\Contracts\Encryption\DecryptException;
use Illuminate\Contracts\Encryption\Encrypter;
use Illuminate\Contracts\Foundation\Application;
use Illuminate\Contracts\Support\Responsable;
use Illuminate\Cookie\CookieValuePrefix;
use Illuminate\Cookie\Middleware\EncryptCookies;
use Illuminate\Session\TokenMismatchException;
use Illuminate\Support\InteractsWithTime;
use Symfony\Component\HttpFoundation\Cookie;

class VerifyCsrfToken
{
    use InteractsWithTime;

/**
     * The application instance.
     *
     * @var \Illuminate\Contracts\Foundation\Application
     */
    protected $app;

/**
     * The encrypter implementation.
     *
     * @var \Illuminate\Contracts\Encryption\Encrypter
     */
    protected $encrypter;

/**
     * The URIs that should be excluded from CSRF verification.
     *
     * @var array<int, string>
     */
    protected $except = [];

/**
     * Indicates whether the XSRF-TOKEN cookie should be set on the response.
     *
     * @var bool
     */
    protected $addHttpCookie = true;

/**
     * Create a new middleware instance.
     *
     * @param  \Illuminate\Contracts\Foundation\Application  $app
     * @param  \Illuminate\Contracts\Encryption\Encrypter  $encrypter
     * @return void
     */
    public function __construct(Application $app, Encrypter $encrypter)
    {
        $this->app = $app;
        $this->encrypter = $encrypter;
    }

/**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     *
     * @throws \Illuminate\Session\TokenMismatchException
     */
    public function handle($request, Closure $next)
    {
        if (
            $this->isReading($request) ||
            $this->runningUnitTests() ||
            $this->inExceptArray($request) ||
            $this->tokensMatch($request)
        ) {
            return tap($next($request), function ($response) use ($request) {
                if ($this->shouldAddXsrfTokenCookie()) {
                    $this->addCookieToResponse($request, $response);
                }
            });
        }

throw new TokenMismatchException('CSRF token mismatch.');
    }

/**
     * Determine if the HTTP request uses a ‘read’ verb.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return bool
     */
    protected function isReading($request)
    {
        return in_array($request->method(), ['HEAD', 'GET', 'OPTIONS']);
    }

/**
     * Determine if the application is running unit tests.
     *
     * @return bool
     */
    protected function runningUnitTests()
    {
        return $this->app->runningInConsole() && $this->app->runningUnitTests();
    }

/**
     * Determine if the request has a URI that should pass through CSRF verification.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return bool
     */
    protected function inExceptArray($request)
    {
        foreach ($this->except as $except) {
            if ($except !== '/') {
                $except = trim($except, '/');
            }

if ($request->fullUrlIs($except) || $request->is($except)) {
                return true;
            }
        }

return false;
    }

/**
     * Determine if the session and input CSRF tokens match.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return bool
     */
    protected function tokensMatch($request)
    {
        $token = $this->getTokenFromRequest($request);

return is_string($request->session()->token()) &&
               is_string($token) &&
               hash_equals($request->session()->token(), $token);
    }

/**
     * Get the CSRF token from the request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return string|null
     */
    protected function getTokenFromRequest($request)
    {
        $token = $request->input('_token') ?: $request->header('X-CSRF-TOKEN');

if (! $token && $header = $request->header('X-XSRF-TOKEN')) {
            try {
                $token = CookieValuePrefix::remove($this->encrypter->decrypt($header, static::serialized()));
            } catch (DecryptException) {
                $token = '';
            }
        }

return $token;
    }

/**
     * Determine if the cookie should be added to the response.
     *
     * @return bool
     */
    public function shouldAddXsrfTokenCookie()
    {
        return $this->addHttpCookie;
    }

/**
     * Add the CSRF token to the response cookies.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Symfony\Component\HttpFoundation\Response  $response
     * @return \Symfony\Component\HttpFoundation\Response
     */
    protected function addCookieToResponse($request, $response)
    {
        $config = config('session');

if ($response instanceof Responsable) {
            $response = $response->toResponse($request);
        }

$response->headers->setCookie($this->newCookie($request, $config));

return $response;
    }

/**
     * Create a new "XSRF-TOKEN" cookie that contains the CSRF token.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  array  $config
     * @return \Symfony\Component\HttpFoundation\Cookie
     */
    protected function newCookie($request, $config)
    {
        return new Cookie(
            'XSRF-TOKEN',
            $request->session()->token(),
            $this->availableAt(60 * $config['lifetime']),
            $config['path'],
            $config['domain'],
            $config['secure'],
            false,
            false,
            $config['same_site'] ?? null,
            $config['partitioned'] ?? false
        );
    }

/**
     * Determine if the cookie contents should be serialized.
     *
     * @return bool
     */
    public static function serialized()
    {
        return EncryptCookies::serialized('XSRF-TOKEN');
    }
}

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