public StringBuilder GetJavascript()
{
Type type = base.GetType();
Uri url = HttpContext.Current.Request.Url;
string text = WebAjaxHandler.GetScriptTemplete();
text = text.Replace("%H_DES%", "通过jQuery.ajax完成服务端函数调用");
text = text.Replace("%H_DATE%", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
text = text.Replace("%URL%", (url.Query.Length > 0) ? url.ToString().Replace(url.Query, "") : url.ToString());
text = text.Replace("%CLS%", type.Name);
StringBuilder stringBuilder = new StringBuilder(text);
MethodInfo[] methods = type.GetMethods(BindingFlags.DeclaredOnly | BindingFlags.Instance | BindingFlags.Public);
MethodInfo[] array = methods;
for (int i = 0; i < array.Length; i++)
{
MethodInfo methodInfo = array[i];
ResponseAnnotationAttribute methodAnnotation = this.GetMethodAnnotation(methodInfo.Name);
stringBuilder.AppendLine("/*----------------------------");
stringBuilder.AppendLine(string.Format("功能说明：{0}", methodAnnotation.Description));
stringBuilder.AppendLine(string.Format("附加说明：缓存时间 {0} 秒", methodAnnotation.CacheDuration.ToString()));
stringBuilder.AppendLine(string.Format(" 输出类型 {0}", methodAnnotation.ResponseFormat.ToString()));
stringBuilder.AppendLine("-----------------------------*/");
string functionTemplete = WebAjaxHandler.GetFunctionTemplete(methodInfo, methodAnnotation.ResponseFormat);
stringBuilder.AppendLine(functionTemplete);
}
return(stringBuilder);
}
/// <summary>
/// 通过实现 System.Web.IHttpHandler 接口的自定义 HttpHandler 启用 HTTP Web 请求的处理。
/// </summary>
/// <param name="context">它提供对用于为 HTTP 请求提供服务的内部服务器对象（如 Request、Response、Session和 Server）的引用。</param>
public void ProcessRequest(HttpContext context)
{
WebRequestDecoder webRequestDecoder = WebRequestDecoder.CreateInstance(context);
if (webRequestDecoder == null)
{
webRequestDecoder = new SimpleUrlDecoder(context);
}
string logicalMethod = webRequestDecoder.LogicalMethod;
ResponseAnnotationAttribute methodAnnotation = this.GetMethodAnnotation(logicalMethod);
WebResponseEncoder webResponseEncoder = WebResponseEncoder.CreateInstance(context, methodAnnotation.ResponseFormat);
if (webResponseEncoder == null)
{
webResponseEncoder = new JQueryScriptEncoder(context);
}
try
{
this.Pre_Invoke(context);
object srcObj = this.InvokeMethod(logicalMethod, webRequestDecoder.Deserialize());
webResponseEncoder.Write(srcObj);
}
catch (Exception ex)
{
string message = (ex.InnerException == null) ? ex.Message : ex.InnerException.Message;
this.ResponseException(context, message, webResponseEncoder);
}
WebAjaxHandler.InitializeCachePolicy(context, methodAnnotation);
}
/// <summary>
/// 获取请求方法特性
/// </summary>
/// <param name="methodName">方法名</param>
/// <returns>特性对象</returns>
private ResponseAnnotationAttribute GetMethodAnnotation(string methodName)
{
MethodInfo method = base.GetType().GetMethod(methodName);
ResponseAnnotationAttribute[] array = (ResponseAnnotationAttribute[])method.GetCustomAttributes(typeof(ResponseAnnotationAttribute), false);
ResponseAnnotationAttribute result = ResponseAnnotationAttribute.Default;
if (array.Length > 0)
{
result = array[0];
}
return(result);
}
/// <summary>
/// 初始化缓存池
/// </summary>
/// <param name="context">当前上下文对象</param>
/// <param name="responseAnnoto">特性参数</param>
private static void InitializeCachePolicy(HttpContext context, ResponseAnnotationAttribute responseAnnoto)
{
if (responseAnnoto.CacheDuration > 0)
{
context.Response.Cache.SetCacheability(HttpCacheability.Server);
context.Response.Cache.SetExpires(DateTime.Now.AddSeconds((double)responseAnnoto.CacheDuration));
context.Response.Cache.SetSlidingExpiration(false);
context.Response.Cache.SetValidUntilExpires(true);
if (responseAnnoto.ParameterCount > 0)
{
context.Response.Cache.VaryByParams["*"] = true;
}
else
{
context.Response.Cache.VaryByParams.IgnoreParams = true;
}
}
else
{
context.Response.Cache.SetNoServerCaching();
context.Response.Cache.SetMaxAge(TimeSpan.Zero);
}
}
