[Mono-bugs] [Bug 664813] New: System.Web.Mvc.JsonResult.ExecuteResult no longer works, exception is thrown at System.Web.Script.Serialization.JavaScriptSerializer..ctor when application is compiled with dmcs (but still works with gmcs)

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=664813

https://bugzilla.novell.com/show_bug.cgi?id=664813#c0


           Summary: System.Web.Mvc.JsonResult.ExecuteResult no longer
                    works, exception is thrown at
                    System.Web.Script.Serialization.JavaScriptSerializer..
                    ctor when application is compiled with dmcs (but still
                    works with gmcs)
    Classification: Mono
           Product: Mono: Class Libraries
           Version: SVN
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Sys.Web
        AssignedTo: mhabersack at novell.com
        ReportedBy: denisv at post.skynet.lt
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2.13)
Gecko/20101203 Firefox/3.6.13

Version: Git e9267b1f2166f2b6bcdd74841700a35a9749da88
OS: Debian Squeeze

ASP.NET MVC applications that return JSON from controller actions appear to
have been broken by a semi-recent commit; Mono compiled from Git around October
2010 used to work.

The following is displayed by actions that return JsonResult:
------------------------------------------------------------------------------
Server Error in '/' Application
Cannot cast from source type to destination type.

Description: HTTP 500. Error processing request.

Stack Trace:

System.InvalidCastException: Cannot cast from source type to destination type.
  at System.Web.Script.Serialization.JavaScriptSerializer..ctor
(System.Web.Script.Serialization.JavaScriptTypeResolver resolver, Boolean
registerConverters) [0x00000] in <filename unknown>:0 
  at System.Web.Script.Serialization.JavaScriptSerializer..cctor () [0x00000]
in <filename unknown>:0 

Version information: Mono Runtime Version: 2.11 (master/c855584 Sun Jan 16
01:42:24 EET 2011); ASP.NET Version: 4.0.30319.1
------------------------------------------------------------------------------

An example that does not require a full ASP.NET application is provided below.
It works with mcs, gmcs but not dmcs (my ASP.NET application uses xsp4).



Reproducible: Always

Steps to Reproduce:
[mono] /tmp/bugtest @ cat test.cs
using System;
using System.IO;
using System.Text;
using System.Web;
using System.Web.Mvc;

class Program
{
        static void Main()
        {
                var obj = new { Foo = "1", Bar = 2 };

                var jsonResult = new JsonResult();
                jsonResult.Data = obj;
                jsonResult.ContentType = "application/json";
                jsonResult.ContentEncoding = Encoding.ASCII;
                jsonResult.JsonRequestBehavior = JsonRequestBehavior.AllowGet;

                var httpRequest = new HttpRequest("test.aspx",
"http://localhost/test.aspx", "");
                var httpResponseWriter = new StringWriter();
                var httpResponse = new HttpResponse(httpResponseWriter);
                var httpContext = new HttpContext(httpRequest, httpResponse);
                var httpContextWrapper = new HttpContextWrapper(httpContext);

                var controllerContext = new ControllerContext();
                controllerContext.HttpContext = httpContextWrapper;

                jsonResult.ExecuteResult(controllerContext);

                Console.WriteLine(httpResponseWriter.ToString());
        }
}

[mono] /tmp/bugtest @ gmcs -r:System.Web -r:System.Web.Mvc
-r:System.Web.Abstractions test.cs && mono test.exe
{"Foo":"1","Bar":2}

[mono] /tmp/bugtest @ dmcs -r:System.Web -r:System.Web.Mvc
-r:System.Web.Abstractions test.cs && mono test.exe

Unhandled Exception: System.TypeInitializationException: An exception was
thrown by the type initializer for
System.Web.Script.Serialization.JavaScriptSerializer --->
System.InvalidCastException: Cannot cast from source type to destination type.
  at System.Web.Script.Serialization.JavaScriptSerializer..ctor
(System.Web.Script.Serialization.JavaScriptTypeResolver resolver, Boolean
registerConverters) [0x00000] in <filename unknown>:0
  at System.Web.Script.Serialization.JavaScriptSerializer..cctor () [0x00000]
in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Web.Mvc.JsonResult.ExecuteResult (System.Web.Mvc.ControllerContext
context) [0x00000] in <filename unknown>:0
  at Program.Main () [0x00000] in <filename unknown>:0
Actual Results:  
Exception is thrown when application is compiled by dmcs.

Expected Results:  
No exception is thrown.


ASP.NET MVC applications could use JavaScriptSerializer manually and return
ContentResult as a workaround, but this requires extensive changes to the
applicaiton.

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