diff vendor/symfony/http-kernel/HttpCache/SubRequestHandler.php @ 17:129ea1e6d783

Update, including to Drupal core 8.6.10

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/http-kernel/HttpCache/SubRequestHandler.php	Thu Feb 28 13:21:36 2019 +0000
@@ -0,0 +1,108 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[e-mail]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\HttpCache;
+
+use Symfony\Component\HttpFoundation\IpUtils;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\HttpKernelInterface;
+
+/**
+ * @author Nicolas Grekas <[e-mail]>
+ *
+ * @internal
+ */
+class SubRequestHandler
+{
+    /**
+     * @return Response
+     */
+    public static function handle(HttpKernelInterface $kernel, Request $request, $type, $catch)
+    {
+        // save global state related to trusted headers and proxies
+        $trustedProxies = Request::getTrustedProxies();
+        $trustedHeaderSet = Request::getTrustedHeaderSet();
+        if (\method_exists(Request::class, 'getTrustedHeaderName')) {
+            Request::setTrustedProxies($trustedProxies, -1);
+            $trustedHeaders = [
+                Request::HEADER_FORWARDED => Request::getTrustedHeaderName(Request::HEADER_FORWARDED, false),
+                Request::HEADER_X_FORWARDED_FOR => Request::getTrustedHeaderName(Request::HEADER_X_FORWARDED_FOR, false),
+                Request::HEADER_X_FORWARDED_HOST => Request::getTrustedHeaderName(Request::HEADER_X_FORWARDED_HOST, false),
+                Request::HEADER_X_FORWARDED_PROTO => Request::getTrustedHeaderName(Request::HEADER_X_FORWARDED_PROTO, false),
+                Request::HEADER_X_FORWARDED_PORT => Request::getTrustedHeaderName(Request::HEADER_X_FORWARDED_PORT, false),
+            ];
+            Request::setTrustedProxies($trustedProxies, $trustedHeaderSet);
+        } else {
+            $trustedHeaders = [
+                Request::HEADER_FORWARDED => 'FORWARDED',
+                Request::HEADER_X_FORWARDED_FOR => 'X_FORWARDED_FOR',
+                Request::HEADER_X_FORWARDED_HOST => 'X_FORWARDED_HOST',
+                Request::HEADER_X_FORWARDED_PROTO => 'X_FORWARDED_PROTO',
+                Request::HEADER_X_FORWARDED_PORT => 'X_FORWARDED_PORT',
+            ];
+        }
+
+        // remove untrusted values
+        $remoteAddr = $request->server->get('REMOTE_ADDR');
+        if (!IpUtils::checkIp($remoteAddr, $trustedProxies)) {
+            foreach ($trustedHeaders as $key => $name) {
+                if ($trustedHeaderSet & $key) {
+                    $request->headers->remove($name);
+                    $request->server->remove('HTTP_'.strtoupper(str_replace('-', '_', $name)));
+                }
+            }
+        }
+
+        // compute trusted values, taking any trusted proxies into account
+        $trustedIps = [];
+        $trustedValues = [];
+        foreach (array_reverse($request->getClientIps()) as $ip) {
+            $trustedIps[] = $ip;
+            $trustedValues[] = sprintf('for="%s"', $ip);
+        }
+        if ($ip !== $remoteAddr) {
+            $trustedIps[] = $remoteAddr;
+            $trustedValues[] = sprintf('for="%s"', $remoteAddr);
+        }
+
+        // set trusted values, reusing as much as possible the global trusted settings
+        if (Request::HEADER_FORWARDED & $trustedHeaderSet) {
+            $trustedValues[0] .= sprintf(';host="%s";proto=%s', $request->getHttpHost(), $request->getScheme());
+            $request->headers->set($name = $trustedHeaders[Request::HEADER_FORWARDED], $v = implode(', ', $trustedValues));
+            $request->server->set('HTTP_'.strtoupper(str_replace('-', '_', $name)), $v);
+        }
+        if (Request::HEADER_X_FORWARDED_FOR & $trustedHeaderSet) {
+            $request->headers->set($name = $trustedHeaders[Request::HEADER_X_FORWARDED_FOR], $v = implode(', ', $trustedIps));
+            $request->server->set('HTTP_'.strtoupper(str_replace('-', '_', $name)), $v);
+        } elseif (!(Request::HEADER_FORWARDED & $trustedHeaderSet)) {
+            Request::setTrustedProxies($trustedProxies, $trustedHeaderSet | Request::HEADER_X_FORWARDED_FOR);
+            $request->headers->set($name = $trustedHeaders[Request::HEADER_X_FORWARDED_FOR], $v = implode(', ', $trustedIps));
+            $request->server->set('HTTP_'.strtoupper(str_replace('-', '_', $name)), $v);
+        }
+
+        // fix the client IP address by setting it to 127.0.0.1,
+        // which is the core responsibility of this method
+        $request->server->set('REMOTE_ADDR', '127.0.0.1');
+
+        // ensure 127.0.0.1 is set as trusted proxy
+        if (!IpUtils::checkIp('127.0.0.1', $trustedProxies)) {
+            Request::setTrustedProxies(array_merge($trustedProxies, ['127.0.0.1']), Request::getTrustedHeaderSet());
+        }
+
+        try {
+            return $kernel->handle($request, $type, $catch);
+        } finally {
+            // restore global state
+            Request::setTrustedProxies($trustedProxies, $trustedHeaderSet);
+        }
+    }
+}