fix: 修复非 gateway 数据包导致数组越界的问题

server/server.go

@@ -630,6 +630,7 @@ func (slf *Server) dispatchMessage(msg *Message) {
 		var conn = attrs[0].(*Conn)
 		var packet = attrs[1].([]byte)
 		var wst = int(packet[len(packet)-1])
+		if len(packet) >= 2 {
 			var ct = packet[len(packet)-2]
 			if ct == 0xff {
 				var gp GP
@@ -641,6 +642,10 @@ func (slf *Server) dispatchMessage(msg *Message) {
 			} else {
 				packet = packet[:len(packet)-1]
 			}
+		} else {
+			packet = packet[:len(packet)-1]
+		}
+
 		if !slf.OnConnectionPacketPreprocessEvent(conn, packet, func(newPacket []byte) { packet = newPacket }) {
 			slf.OnConnectionReceivePacketEvent(conn, Packet{Data: packet, WebsocketType: wst})
 		}