function callSync(method, request)
{
var http =
newHTTP();
http.open('POST', url,
false, self.httpUserName, self.httpPassword);
setupHeaders(http,
method);
http.send(JSON.stringify(request));
if (http.status !=
200)
throw { message : http.status + '
' + http.statusText, toString : function()
{ return message; }
};
var response =
JSON.eval_r(http.responseText);
if (response.error !=
null) throw response.error;
return
response.result;
}
function callAsync(method, request,
callback)
{
var http =
newHTTP();
http.open('POST', url,
true, self.httpUserName, self.httpPassword);
setupHeaders(http,
method);
http.onreadystatechange
= function() { http_onreadystatechange(http,
callback); }
http.send(JSON.stringify(request));
return request.id;
}
function setupHeaders(http, method)
{
http.setRequestHeader('Content-Type', 'text/plain;
charset=utf-8');
http.setRequestHeader('X-JSON-RPC', method);
}
function http_onreadystatechange(sender,
callback)
{
if (sender.readyState ==
4)
{
var response = sender.status == 200 ?
JSON.eval_r(sender.responseText) :
{};
response.xmlHTTP = sender;
callback(response);
}
}
function newHTTP()
{
return
typeof(ActiveXObject) === 'function' ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest();
}
}
HelloWorld.rpcMethods = ["system.about","system.version","system.listMethods","greetings"];
上面JS文档是自动生成的，ASP.NET
AJAX也有自动生成客户端访问对象的功能，方法不得而知，而Jayrock的方法确实清晰的，因为有Source Code。
Jayrock 远程方法要求写在一个ashx中，页面请求这个ashx的时候，在ProcessRequest
中根据Request对象中的参数信息，确定请求的服务器端方法名称和参数，然后进行调用，并返回结果。
Jayrock 功能完善，代码比较长，下面是个原理实例，并非Jayrock的Source Code。
<%@ WebHandler Language="C#"
%>
using System;
using System.Web;
using MyRpc;
public class HelloWorld : IHttpHandler
{
public void ProcessRequest (HttpContext
context)
{
string oMethod =
context.Request.Params[0];
Type t = this.GetType();
System.Reflection.MethodInfo []mis = t.GetMethods();
foreach
(System.Reflection.MethodInfo mi in mis)
{
foreach (MyRpcServiceAttribute ma in
mi.GetCustomAttributes(typeof(MyRpcServiceAttribute), false))
{
string strResult = "";
if (mi.Name == oMethod)
{
if (!mi.IsStatic)
{
object oService = Activator.CreateInstance(t);
strResult = (string)mi.Invoke(oService, null);
}
else
{
strResult = (string)mi.Invoke(null, null);
}
}
context.Response.Write(strResult);
}
}