增加代理

@@ -36,7 +36,7 @@ class ProxyService
             SWOOLE_SOCK_TCP//|SWOOLE_SSL
         );
         $server->set([
-           'dispatch_mode'  =>  2 // 固定模式
+            'dispatch_mode'  =>  2 // 固定模式
         ]);
         //监听连接进入事件。
         $server->on('Connect', function ($server, $fd) {
@@ -51,18 +51,20 @@ class ProxyService
             if(empty($this->clients[$fd])){
                 $this->clients[$fd] = new SmtpClient();
             }
+
+            $client = $this->clients[$fd];
             // 加锁
-            $this->clients[$fd]->lock();
+            $client->lock();
             // 处理数据
-            $result = $this->clients[$fd]->exec($data);
+            $result = $client->exec($data);
             // 解锁
-            $this->clients[$fd]->unlock();
+            $client->unlock();
             // 返回结果
             $server->send($fd, $this->push($result[1]));
             // 是否关闭连接
             if($result[0]===false){
                 // 关闭并释放资源
-                $this->clients[$fd]->close();
+                $client->close();
                 $this->clients[$fd] = null;
                 unset($this->clients[$fd]);
 
@@ -73,6 +75,7 @@ class ProxyService
         //监听连接关闭事件。
         $server->on('Close', function ($server, $fd) {
             echo '连接关闭了 => '.$fd."\n";
+            $this->clients[$fd] = null;
             unset($this->clients[$fd]);
         });