/// <summary>
/// 获取动作的参数
/// </summary>
/// <param name="controllerContext"></param>
/// <param name="actionDescriptor"></param>
/// <returns></returns>
protected virtual IDictionary <string, object> GetParameterValues(ControllerContext controllerContext, ActionDescriptor actionDescriptor)
{
var context = controllerContext.HttpContext;
IActionParametersProvider provider = ActionParametersProviderFactory.CreateActionParametersProvider(context.Request);
return(provider.GetParameters(context.Request, actionDescriptor));
}
private static object[] GetActionCallParameters(HttpContext context, ActionDescription action)
{
if (action.Parameters == null || action.Parameters.Length == 0)
{
return(null);
}
IActionParametersProvider provider = ActionParametersProviderFactory.CreateActionParametersProvider(context.Request);
return(provider.GetParameters(context.Request, action));
}
private object[] GetActionParameters()
{
ActionDescription action = this.InvokeInfo.Action;
if (action.Parameters == null || action.Parameters.Length == 0)
{
return(null);
}
IActionParametersProvider provider
= ActionParametersProviderFactory.Instance.CreateProvider(this.HttpContext);
object[] parameters = null;
IActionParametersProvider2 p2 = provider as IActionParametersProvider2;
if (p2 != null) // 优先使用内部接口版本
{
parameters = p2.GetParameters(this.HttpContext, action);
}
else
{
parameters = provider.GetParameters(this.HttpContext, action.MethodInfo);
}
EventHandler <GetActionParametersEventArgs> eventHandler = this.OnGetActionParameters;
if (eventHandler != null)
{
GetActionParametersEventArgs e = new GetActionParametersEventArgs {
HttpContext = this.HttpContext,
ActionMethod = this.InvokeInfo.Action.MethodInfo,
Parameters = parameters
};
eventHandler(this, e);
return(e.Parameters);
}
return(parameters);
}
private object[] ExecuteObtainParameters()
{
ActionDescription action = this.InvokeInfo.Action;
if (action.Parameters == null || action.Parameters.Length == 0)
{
return(null);
}
// 从工厂中获取一个能够构造Action参数的提供者实例。
IActionParametersProvider provider
= ActionParametersProviderFactory.Instance.CreateProvider(this.HttpContext);
object[] parameters = null;
// 优先使用内部接口版本
IActionParametersProvider2 p2 = provider as IActionParametersProvider2;
if (p2 != null)
{
parameters = p2.GetParameters(this.HttpContext, action);
}
else
{
parameters = provider.GetParameters(this.HttpContext, action.MethodInfo);
}
// 引发事件，允许在外部修改获取到的事件参数，可修改数组中元素，但数组本身不允许重新指定。
EventHandler <EndObtainParametersEventArgs> eventHandler = this.EndObtainParameters;
if (eventHandler != null)
{
EndObtainParametersEventArgs e = CreateEventArgs <EndObtainParametersEventArgs>();
e.Parameters = parameters;
// 调用外部的事件处理器
eventHandler(this, e);
}
return(parameters);
}
/// <summary>
/// 根据HttpContext创建一个匹配的IActionParametersProvider实例
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public virtual IActionParametersProvider CreateProvider(HttpContext context)
{
// 扩展点：允许自定义 IActionParametersProvider从HTTP请求中解析数据
if (context == null)
{
throw new ArgumentNullException("context");
}
string contentType = context.Request.ContentType;
if (string.IsNullOrEmpty(contentType) ||
contentType.IndexOfIgnoreCase(RequestContentType.Form) >= 0 ||
contentType.IndexOfIgnoreCase(RequestContentType.Multipart) >= 0)
{
return(CreateFormProvider(context));
}
if (contentType.IndexOfIgnoreCase(RequestContentType.Json) >= 0)
{
return(CreateJsonProvider(context));
}
if (contentType.IndexOfIgnoreCase(RequestContentType.Xml) >= 0)
{
return(CreateXmlProvider(context));
}
IActionParametersProvider provider = CreateCustomizeProvider(context);
if (provider != null)
{
return(provider);
}
// 其它未能识别的格式，都会按默认方式处理
return(CreateDefaultProvider(context));
}
/// <summary>
/// 根据HttpContext创建一个匹配的IActionParametersProvider实例
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public virtual IActionParametersProvider CreateProvider(HttpContext context)
{
// 扩展点：允许自定义 IActionParametersProvider从HTTP请求中解析数据
if (context == null)
{
throw new ArgumentNullException("context");
}
string contentType = context.Request.ContentType;
if (string.IsNullOrEmpty(contentType) ||
contentType.IndexOfIgnoreCase("application/x-www-form-urlencoded") >= 0)
{
return(CreateFormProvider(context));
}
if (contentType.IndexOfIgnoreCase("application/json") >= 0)
{
return(CreateJsonProvider(context));
}
if (contentType.IndexOfIgnoreCase("application/xml") >= 0)
{
return(CreateXmlProvider(context));
}
IActionParametersProvider provider = CreateCustomizeProvider(context);
if (provider != null)
{
return(provider);
}
// 默认还是表单的 key = vlaue格式。
// "multipart/form-data", "text/plain" 也会到这里
return(CreateDefaultProvider(context));
}