/// <summary>
/// Generic method that handles processing a Callback request by routing to
/// a method in a provided target object.
///
/// </summary>
/// <param name="target">The target object that is to be called. If null this is used</param>
public void ProcessCallbackMethodCall(object target, string methodToCall)
{
if (target == null)
{
target = this;
}
HttpRequest Request = HttpContext.Current.Request;
HttpResponse Response = HttpContext.Current.Response;
Response.Charset = null;
CallbackMethodProcessorHelper helper = new CallbackMethodProcessorHelper(this);
List <string> ParameterList = null;
string contentType = Request.ContentType.ToLower();
// check for Route Data method name
if (string.IsNullOrEmpty(methodToCall) && target is CallbackHandler)
{
CallbackHandler chandler = target as CallbackHandler;
if (chandler.RouteData != null)
{
methodToCall = ((CallbackHandlerRouteHandler)chandler.RouteData.RouteHandler).MethodName;
}
}
// Allow for a single XML object to be POSTed rather than POST variables
if (contentType.StartsWith(ControlResources.STR_XmlContentType))
{
if (string.IsNullOrEmpty(methodToCall))
{
methodToCall = Request.Params["Method"];
}
if (string.IsNullOrEmpty(methodToCall))
{
WriteErrorResponse("No method to call specified.", null);
return;
}
// Pass a Parameter List with our JSON encoded parameters
ParameterList = new List <string>();
if (Request.ContentLength > 0L)
{
// Pick up single unencoded JSON parameter
string singleParm = UrlUtils.FormBufferToString();
if (!string.IsNullOrEmpty(singleParm))
{
ParameterList.Add(singleParm);
}
}
}
// Post AjaxMethodCallback style interface
else if (contentType.StartsWith(ControlResources.STR_UrlEncodedContentType) && Request.Params["CallbackMethod"] != null)
{
// Only pick up the method name - Parameters are parsed out of POST buffer during method calling
methodToCall = Request.Params["CallbackMethod"];
}
else
{
if (string.IsNullOrEmpty(methodToCall))
{
methodToCall = Request.QueryString["Method"];
}
if (string.IsNullOrEmpty(methodToCall))
{
WriteErrorResponse("No method to call specified.", null);
return;
}
}
object Result = null;
string StringResult = null;
CallbackMethodAttribute attr = new CallbackMethodAttribute();
try
{
if (ParameterList != null)
{
// use the supplied parameter list
Result = helper.ExecuteMethod(methodToCall, target, ParameterList.ToArray(),
CallbackMethodParameterType.Xml, ref attr);
}
else
{
// grab the info out of QueryString Values or POST buffer during parameter parsing
// for optimization
Result = helper.ExecuteMethod(methodToCall, target, null,
CallbackMethodParameterType.Xml, ref attr);
}
}
catch (Exception ex)
{
Exception ActiveException = null;
if (ex.InnerException != null)
{
ActiveException = ex.InnerException;
}
else
{
ActiveException = ex;
}
WriteErrorResponse(ActiveException.Message,
(HttpContext.Current.IsDebuggingEnabled ? ex.StackTrace : null));
return;
}
// Special return type handling: Stream, Bitmap, byte[] and raw string results
// are converted and returned directly
HandleSpecialReturnTypes(Result, attr, Request, Response);
// Standard json formatting
try
{
SerializationUtils.SerializeObject(Result, out StringResult);
}
catch (Exception ex)
{
WriteErrorResponse(ex.Message, HttpContext.Current.IsDebuggingEnabled ? ex.StackTrace : null);
return;
}
// Explicitly set the content type here
Response.ContentType = ControlResources.STR_XmlContentType;
Response.Write(StringResult);
Response.End();
}