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File / Folder	Size	Action
.	-
AddLinkHeadersForPreloa...	0.729KB	edt ren
CheckResponseForModific...	0.526KB	edt ren
FrameGuard.php	0.487KB	edt ren
HandleCors.php	2.69KB	edt ren
SetCacheHeaders.php	2.447KB	edt ren
TrustHosts.php	1.66KB	edt ren
TrustProxies.php	3.735KB	edt ren

<?php

namespace Illuminate\Http\Middleware;

use Closure;
use Illuminate\Http\Request;

class TrustProxies
{
    /**
     * The trusted proxies for the application.
     *
     * @var array<int, string>|string|null
     */
    protected $proxies;

/**
     * The proxy header mappings.
     *
     * @var int
     */
    protected $headers = Request::HEADER_X_FORWARDED_FOR | Request::HEADER_X_FORWARDED_HOST | Request::HEADER_X_FORWARDED_PORT | Request::HEADER_X_FORWARDED_PROTO | Request::HEADER_X_FORWARDED_PREFIX | Request::HEADER_X_FORWARDED_AWS_ELB;

/**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     *
     * @throws \Symfony\Component\HttpKernel\Exception\HttpException
     */
    public function handle(Request $request, Closure $next)
    {
        $request::setTrustedProxies([], $this->getTrustedHeaderNames());

$this->setTrustedProxyIpAddresses($request);

return $next($request);
    }

/**
     * Sets the trusted proxies on the request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return void
     */
    protected function setTrustedProxyIpAddresses(Request $request)
    {
        $trustedIps = $this->proxies() ?: config('trustedproxy.proxies');

if ($trustedIps === '*' || $trustedIps === '**') {
            return $this->setTrustedProxyIpAddressesToTheCallingIp($request);
        }

$trustedIps = is_string($trustedIps)
                ? array_map('trim', explode(',', $trustedIps))
                : $trustedIps;

if (is_array($trustedIps)) {
            return $this->setTrustedProxyIpAddressesToSpecificIps($request, $trustedIps);
        }
    }

/**
     * Specify the IP addresses to trust explicitly.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  array  $trustedIps
     * @return void
     */
    protected function setTrustedProxyIpAddressesToSpecificIps(Request $request, array $trustedIps)
    {
        $request->setTrustedProxies($trustedIps, $this->getTrustedHeaderNames());
    }

/**
     * Set the trusted proxy to be the IP address calling this servers.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return void
     */
    protected function setTrustedProxyIpAddressesToTheCallingIp(Request $request)
    {
        $request->setTrustedProxies([$request->server->get('REMOTE_ADDR')], $this->getTrustedHeaderNames());
    }

/**
     * Retrieve trusted header name(s), falling back to defaults if config not set.
     *
     * @return int A bit field of Request::HEADER_*, to set which headers to trust from your proxies.
     */
    protected function getTrustedHeaderNames()
    {
        if (is_int($this->headers)) {
            return $this->headers;
        }

return match ($this->headers) {
            'HEADER_X_FORWARDED_AWS_ELB' => Request::HEADER_X_FORWARDED_AWS_ELB,
            'HEADER_FORWARDED' => Request::HEADER_FORWARDED,
            'HEADER_X_FORWARDED_FOR' => Request::HEADER_X_FORWARDED_FOR,
            'HEADER_X_FORWARDED_HOST' => Request::HEADER_X_FORWARDED_HOST,
            'HEADER_X_FORWARDED_PORT' => Request::HEADER_X_FORWARDED_PORT,
            'HEADER_X_FORWARDED_PROTO' => Request::HEADER_X_FORWARDED_PROTO,
            'HEADER_X_FORWARDED_PREFIX' => Request::HEADER_X_FORWARDED_PREFIX,
            default => Request::HEADER_X_FORWARDED_FOR | Request::HEADER_X_FORWARDED_HOST | Request::HEADER_X_FORWARDED_PORT | Request::HEADER_X_FORWARDED_PROTO | Request::HEADER_X_FORWARDED_PREFIX | Request::HEADER_X_FORWARDED_AWS_ELB,
        };
    }

/**
     * Get the trusted proxies.
     *
     * @return array|string|null
     */
    protected function proxies()
    {
        return $this->proxies;
    }
}

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