/// <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);
}
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>
/// 参数解析
/// </summary>
/// <param name="method">方法</param>
/// <param name="args">参数</param>
/// <returns>结果</returns>
private object[] GetArguments(MethodInfo method, Dictionary <string, object> args)
{
List <object> list = new List <object>();
if (method != null)
{
ParameterInfo[] parameters = method.GetParameters();
ParameterInfo[] array = parameters;
for (int i = 0; i < array.Length; i++)
{
ParameterInfo parameterInfo = array[i];
if (args != null && args.ContainsKey(parameterInfo.Name))
{
object obj = args[parameterInfo.Name];
if (obj != null)
{
Type parameterType = WebAjaxHandler.GetParameterType(parameterInfo);
if (obj is IDictionary <string, object> || obj is Array)
{
JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
string input = javaScriptSerializer.Serialize(obj);
list.Add(javaScriptSerializer.Deserialize(input, parameterType));
}
else if (obj.GetType() != parameterType)
{
if (parameterType.IsEnum)
{
if (obj is int)
{
list.Add(Enum.ToObject(parameterType, obj));
}
else
{
list.Add(Enum.Parse(parameterType, obj.ToString(), true));
}
}
else if (parameterType == typeof(Guid))
{
list.Add(Guid.Parse(obj.ToString()));
}
else
{
list.Add(Convert.ChangeType(obj, parameterType));
}
}
else
{
list.Add(obj);
}
}
}
else
{
list.Add(WebAjaxHandler.IsNullAssignable(parameterInfo.ParameterType) ? null : parameterInfo.DefaultValue);
}
}
}
return(list.ToArray());
}
/// <summary>
/// 获取参数类型
/// </summary>
/// <param name="pi">ParameterInfo</param>
/// <returns>Type</returns>
private static Type GetParameterType(ParameterInfo pi)
{
return(WebAjaxHandler.IsNullable(pi.ParameterType) ? WebAjaxHandler.GetNullableInstanceType(pi.ParameterType) : pi.ParameterType);
}
/// <summary>
/// 判断空
/// </summary>
/// <param name="type">type</param>
/// <returns>bool</returns>
private static bool IsNullAssignable(Type type)
{
return(!type.IsValueType || WebAjaxHandler.IsNullable(type));
}
