/// <summary>
/// Processes incoming requests and routes them to the appropriate JSON handler method.
/// </summary>
/// <param name="context"></param>
void IHttpHandler.ProcessRequest(HttpContext context)
{
IsExecuting = true;
try
{
// Perform the requested operation
switch (context.Request.PathInfo)
{
case "/GetType":
// Enable response caching
context.Response.Cache.SetCacheability(HttpCacheability.Public);
context.Response.Cache.SetExpires(DateTime.Now.AddDays(7));
context.Response.Cache.SetMaxAge(TimeSpan.FromDays(7));
// Output the type metadata
context.Response.ContentType = "application/json";
JsonUtility.Serialize(context.Response.OutputStream, new ServiceRequest(context.Request.QueryString["type"].Replace("\"", "")).Invoke(null));
break;
case "/LogError":
// Raise the error event
context.Response.ContentType = "application/json";
ExoWeb.OnError(JsonUtility.Deserialize<ServiceError>(context.Request.InputStream));
break;
default:
// Deserialize the request
context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
context.Response.Cache.SetNoStore();
ServiceRequest request = JsonUtility.Deserialize<ServiceRequest>(context.Request.InputStream);
// Invoke the request and output the response
context.Response.ContentType = "application/json";
using (var test = new StringWriter())
{
JsonUtility.Serialize(test, request.Invoke(null));
context.Response.Write(test.ToString());
}
break;
}
}
catch (Exception e)
{
// look for an ExoModel.ModelException that may display a more
// abstracted or informative message in the UI. Otherwise, use
// the inner most exception
Exception reported = e;
for (Exception x = e; x != null; x = x.InnerException)
{
reported = x;
if (x is ModelException)
break;
}
// Create an error to log
var error = new ServiceError();
error.Type = reported.GetType().FullName;
error.StackTrace = GetFullStackTrace(e);
error.Message = reported.Message;
error.Url = context.Request.RawUrl;
if (error.AdditionalInfo == null)
error.AdditionalInfo = new Dictionary<string, object>();
//error.AdditionalInfo.Add("Client.RequestJson", json);
// Raise the error event
ExoWeb.OnError(error);
// Also send the error information to the client
context.Response.Clear();
context.Response.ContentType = "application/json";
context.Response.StatusCode = 500; // internal server error
// Enable error information on client
if (ExoWeb.EnableExceptionInformation)
{
context.Response.AddHeader("jsonerror", "true");
// Ensure IIS 7 doesn't intercept the error
context.Response.TrySkipIisCustomErrors = true;
}
context.Response.Write(ExoWeb.ToJson(error));
}
}
internal ServiceErrorEventArgs(ServiceError error)
{
this.Error = error;
}
