Initial commit - Last War messaging system

2026-02-19 01:33:28 -06:00
commit 38a8447a64
2162 changed files with 216183 additions and 0 deletions
--- a/vendor/react/dns/src/Query/CachingExecutor.php
+++ b/vendor/react/dns/src/Query/CachingExecutor.php
@@ -0,0 +1,88 @@
+<?php
+
+namespace React\Dns\Query;
+
+use React\Cache\CacheInterface;
+use React\Dns\Model\Message;
+use React\Promise\Promise;
+
+final class CachingExecutor implements ExecutorInterface
+{
+    /**
+     * Default TTL for negative responses (NXDOMAIN etc.).
+     *
+     * @internal
+     */
+    const TTL = 60;
+
+    private $executor;
+    private $cache;
+
+    public function __construct(ExecutorInterface $executor, CacheInterface $cache)
+    {
+        $this->executor = $executor;
+        $this->cache = $cache;
+    }
+
+    public function query(Query $query)
+    {
+        $id = $query->name . ':' . $query->type . ':' . $query->class;
+        $cache = $this->cache;
+        $that = $this;
+        $executor = $this->executor;
+
+        $pending = $cache->get($id);
+        return new Promise(function ($resolve, $reject) use ($query, $id, $cache, $executor, &$pending, $that) {
+            $pending->then(
+                function ($message) use ($query, $id, $cache, $executor, &$pending, $that) {
+                    // return cached response message on cache hit
+                    if ($message !== null) {
+                        return $message;
+                    }
+
+                    // perform DNS lookup if not already cached
+                    return $pending = $executor->query($query)->then(
+                        function (Message $message) use ($cache, $id, $that) {
+                            // DNS response message received => store in cache when not truncated and return
+                            if (!$message->tc) {
+                                $cache->set($id, $message, $that->ttl($message));
+                            }
+
+                            return $message;
+                        }
+                    );
+                }
+            )->then($resolve, function ($e) use ($reject, &$pending) {
+                $reject($e);
+                $pending = null;
+            });
+        }, function ($_, $reject) use (&$pending, $query) {
+            $reject(new \RuntimeException('DNS query for ' . $query->describe() . ' has been cancelled'));
+            $pending->cancel();
+            $pending = null;
+        });
+    }
+
+    /**
+     * @param Message $message
+     * @return int
+     * @internal
+     */
+    public function ttl(Message $message)
+    {
+        // select TTL from answers (should all be the same), use smallest value if available
+        // @link https://tools.ietf.org/html/rfc2181#section-5.2
+        $ttl = null;
+        foreach ($message->answers as $answer) {
+            if ($ttl === null || $answer->ttl < $ttl) {
+                $ttl = $answer->ttl;
+            }
+        }
+
+        if ($ttl === null) {
+            $ttl = self::TTL;
+        }
+
+        return $ttl;
+    }
+}