在不使用套接字的情况下在客户端和服务器之间交换数据

I need to develop an application in which I have a Java script running on the client that needs to call Java procedures on the server (for example getting data from a database, I cannot do it directly from the client because the only port that is open on my Web Service is port 80). Since the only port open on the server is port 80 and a Web Service is listening on that port I cannot create a Java socket (am I correct?). What other options do I have?I need to develop an application in which I hav