# aardio 范例: JSON-RPC( HTTP )



```aardio
//JSON-RPC( HTTP )
import win.ui;
/*DSG{{*/
var winform = win.form(text="JSON-RPC";right=759;bottom=469)
winform.add(
edit={cls="edit";left=13;top=18;right=734;bottom=444;edge=1;multiline=1;z=1}
)
/*}}*/

//开发环境安装模块
if(_STUDIO_INVOKED){
	import process.python.pip;
	process.python.pip.require("jsonrpclib")	
}

//获取空闲端口
import wsock;
winform.rpcServerPort = wsock.getFreePort();

import process.python;  
process.python.exec(`
from jsonrpclib.SimpleJSONRPCServer import SimpleJSONRPCServer

# 指定 logRequests=False 就不用打开控制台，不然没有控制台会直接退出
server = SimpleJSONRPCServer(('localhost', `+winform.rpcServerPort+`),logRequests=False)
server.register_function(pow)
server.register_function(lambda x,y: x+y, 'add')
server.register_function(lambda x: x, 'ping')
server.serve_forever()
`); 

//启动 JSON-RPC 客户端线程( aardio )
thread.invoke( 
	function(winform){
		thread.delay(1000);
		
		import web.rpc.jsonClient;
		
		//创建JSON-RPC 2.0客户端
		var client = web.rpc.jsonClient("http://127.0.0.1:" + winform.rpcServerPort)
		
		//调用远程对象和函数 aardio.$hello
		var rep = client.add(12,3); 
  		
  		winform.edit.print( "返回值：", rep[["result"]] );
  		
		winform.edit.print( client.rpc.lastResponse() );
	},winform
)

winform.show();
win.loopMessage();

```