[Mono-dev] ASP.NET Web API on Mono 3.0 (Could not load type 'System.Web.Http.WebHost.HttpControllerHandler')

[Daniel Lo Nigro]

Just rediscovered the MONO_LOG_LEVEL="debug" environment variable. Here's
the log from my app: http://sprunge.us/eXOV. I think these might be
related, but of course I could be totally wrong:
Mono: The class System.Web.Http.Hosting.IHostBufferPolicySelector could not
be loaded, used in System.Web.Http, Version=4.0.0.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35
Mono: The class System.Net.Http.HttpMessageInvoker could not be loaded,
used in System.Net.Http, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b03f5f7f11d50a3a

Thoughts?


On Wed, Oct 24, 2012 at 2:23 PM, Daniel Lo Nigro <lists at dan.cx> wrote:

> I'm trying to get ASP.NET WebApi working on Mono 3.0, and am getting
> the following error:
>
> System.TypeLoadException: Could not load type
> 'System.Web.Http.WebHost.HttpControllerHandler' from assembly
> 'System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral,
> PublicKeyToken=31bf3856ad364e35'.
>   at (wrapper managed-to-native) System.Type:type_is_assignable_from
> (System.Type,System.Type)
>   at System.Type.IsAssignableFrom (System.Type c) [0x00096] in
> /usr/local/src/mono-3.0.0/mcs/class/corlib/System/Type.cs:902
>   at System.Web.Mvc.AreaRegistration.IsAreaRegistrationType
> (System.Type type) [0x00000] in <filename unknown>:0
>   at
> System.Web.Mvc.TypeCacheUtil+<>c__DisplayClass1.<FilterTypesInAssemblies>b__0
> (System.Type type) [0x00000] in <filename unknown>:0
>   at
> System.Linq.Enumerable+<CreateWhereIterator>c__Iterator35`1[System.Type].MoveNext
> () [0x00059] in
>
> /usr/local/src/mono-3.0.0/mcs/class/System.Core/System.Linq/Enumerable.cs:3030
>   at System.Collections.Generic.List`1[System.Type].AddEnumerable
> (IEnumerable`1 enumerable) [0x00013] in
>
> /usr/local/src/mono-3.0.0/mcs/class/corlib/System.Collections.Generic/List.cs:134
>   at System.Collections.Generic.List`1[System.Type]..ctor
> (IEnumerable`1 collection) [0x0002f] in
>
> /usr/local/src/mono-3.0.0/mcs/class/corlib/System.Collections.Generic/List.cs:69
>   at System.Linq.Enumerable.ToList[Type] (IEnumerable`1 source)
> [0x00006] in
> /usr/local/src/mono-3.0.0/mcs/class/System.Core/System.Linq/Enumerable.cs:2867
>   at System.Web.Mvc.TypeCacheUtil.GetFilteredTypesFromAssemblies
> (System.String cacheName, System.Predicate`1 predicate, IBuildManager
> buildManager) [0x00000] in <filename unknown>:0
>   at System.Web.Mvc.AreaRegistration.RegisterAllAreas
> (System.Web.Routing.RouteCollection routes, IBuildManager
> buildManager, System.Object state) [0x00000] in <filename unknown>:0
>   at System.Web.Mvc.AreaRegistration.RegisterAllAreas (System.Object
> state) [0x00000] in <filename unknown>:0
>   at System.Web.Mvc.AreaRegistration.RegisterAllAreas () [0x00000] in
> <filename unknown>:0
>   at Daniel15.WebApiTest.WebApiApplication.Application_Start ()
> [0x00000] in <filename unknown>:0
>   at (wrapper managed-to-native)
> System.Reflection.MonoMethod:InternalInvoke
> (System.Reflection.MonoMethod,object,object[],System.Exception&)
>   at System.Reflection.MonoMethod.Invoke (System.Object obj,
> BindingFlags invokeAttr, System.Reflection.Binder binder,
> System.Object[] parameters, System.Globalization.CultureInfo culture)
> [0x000d5] in
> /usr/local/src/mono-3.0.0/mcs/class/corlib/System.Reflection/MonoMethod.cs:229
>
> Followed by this error:
> System.TypeLoadException:
> A type load exception has occurred.
> Description: HTTP 500.Error processing request.
> Details: Non-web exception. Exception origin (name of application or
> object): Daniel15.WebApiTest.
>
> Are there additional debug flags I can use to determine what's causing
> this and why it's unable to load the type? I'm using Mono 3.0
> (compiled from source) and xsp/fastcgi-mono-server4 (latest Git
> version)
>
> Thanks in advance!
>
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