public StringBuilder GetSvr()
{
Type type = this.GetType();
System.Uri url = HttpContext.Current.Request.Url;
string script = GetScriptTemplete();
script = script.Replace("%H_DESC%", "通过jQuery.ajax完成服务端函数调用");
script = script.Replace("%H_DATE%", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"));
script = script.Replace("%URL%", url.Query.Length > 0?url.ToString().Replace(url.Query, ""):url.ToString());
script = script.Replace("%CLS%", type.Name);
StringBuilder scriptBuilder = new StringBuilder(script);
MethodInfo[] methods = type.GetMethods(BindingFlags.Public | BindingFlags.Instance | BindingFlags.DeclaredOnly);
foreach (MethodInfo m in methods)
{
ResponseAnnotationAttribute resAnn = this.GetAnnation(m.Name);
scriptBuilder.AppendLine("/*----------------------------------------------------------------------------");
scriptBuilder.AppendLine("功能说明:" + resAnn.Desc);
scriptBuilder.AppendLine("附加说明:缓存时间 " + resAnn.CacheDuration.ToString() + " 秒");
scriptBuilder.AppendLine(" 输出类型 " + resAnn.ResponseFormat.ToString());
scriptBuilder.AppendLine("----------------------------------------------------------------------------*/");
string func = GetFunctionTemplete(m, resAnn.ResponseFormat);
scriptBuilder.AppendLine(func);
}
return(scriptBuilder);
}
/// <summary>
/// 设置缓存策略
/// </summary>
/// <param name="context"></param>
/// <param name="resAnn"></param>
private static void InitializeCachePolicy(HttpContext context, ResponseAnnotationAttribute resAnn)
{
int cacheDuration = resAnn.CacheDuration;
if (cacheDuration > 0)
{
context.Response.Cache.SetCacheability(HttpCacheability.Server);
context.Response.Cache.SetExpires(DateTime.Now.AddSeconds(
(double)cacheDuration));
context.Response.Cache.SetSlidingExpiration(false);
context.Response.Cache.SetValidUntilExpires(true);
if (resAnn.Params > 0)
{
context.Response.Cache.VaryByParams["*"] = true;
}
else
{
context.Response.Cache.VaryByParams.IgnoreParams = true;
}
}
else
{
context.Response.Cache.SetNoServerCaching();
context.Response.Cache.SetMaxAge(TimeSpan.Zero);
}
}
/// <summary>
/// 取得方法的返回值标注属性
/// </summary>
/// <param name="methodName"></param>
/// <returns></returns>
private ResponseAnnotationAttribute GetAnnation(string methodName)
{
MethodInfo methInfo = this.GetType().GetMethod(methodName, BindingFlags.Instance | BindingFlags.Public);
ResponseAnnotationAttribute[] resAnns = (ResponseAnnotationAttribute[])methInfo.GetCustomAttributes(typeof(ResponseAnnotationAttribute), false);
ResponseAnnotationAttribute ann = null;
if (resAnns.Length == 0)
{
ann = ResponseAnnotationAttribute.Default;
}
else
{
ann = resAnns[0];
}
ann = (ann as ICloneable).Clone() as ResponseAnnotationAttribute;
ParameterInfo[] ps = methInfo.GetParameters();
if (ps != null)
{
ann.Params = ps.Length;
}
return(ann);
}
public object Clone()
{
ResponseAnnotationAttribute obj = new ResponseAnnotationAttribute();
obj.ResponseFormat = this.ResponseFormat;
obj.Params = this.Params;
obj.CacheDuration = this._caccheDuration;
obj.Desc = this._desc;
return(obj);
}
/// <summary>
/// 处理客户端请求
/// </summary>
/// <param name="context"></param>
public void ProcessRequest(HttpContext context)
{
string contextMethod = "";
#region 解码阶段
WebRequestDecoder decoder = null;
try
{
decoder = WebRequestDecoder.CreateInstance(context);
}
catch (NotImplementedException)
{
decoder = this.OnDecodeResolve(context);
if (decoder == null)
{
throw new NotSupportedException("无法为当前的请求提供适当的解码器");
}
}
contextMethod = decoder.LogicalMethod;
#endregion
#region 调用阶段
object result = this.Invoke(contextMethod, decoder.Deserialize());
ResponseAnnotationAttribute resAnn = this.GetAnnation(contextMethod);
#endregion
#region 编码阶段
WebResponseEncoder encoder = null;
try
{
encoder = WebResponseEncoder.CreateInstance(context, resAnn.ResponseFormat);
}
catch (NotImplementedException)
{
encoder = this.OnEncoderResolve(context, contextMethod, resAnn);
if (encoder == null)
{
throw new NotSupportedException("无法为当前的请求提供适当的编码器");
}
}
#region 处理化自定义的序列化机制
OnSerializeHandler handler = this.OnGetCustomerSerializer(contextMethod);
if (handler != null)
{
encoder.OnSerialize += handler;
}
#endregion
#endregion
#region 回复阶段
encoder.Write(result);
InitializeCachePolicy(context, resAnn);
#endregion
}
/// <summary>
/// 当默认的编码器配置无法提供的时候，根据上下文解析新的编码器
/// </summary>
/// <param name="context"></param>
/// <param name="contextMethod"></param>
/// <param name="resAnn"></param>
/// <returns></returns>
protected virtual WebResponseEncoder OnEncoderResolve(HttpContext context, string contextMethod, ResponseAnnotationAttribute resAnn)
{
if (contextMethod == "GetSvr")
{
return(new JQueryScriptEncoder(context));
}
return(null);
}
