Btukfyl

Because of this blog-post:

https://www.radenkozec.com/8-ways-improve-asp-net-web-api-performance/

I´ve tried to replace JSON.net with ServiceStack.Text as JSON-Serializer in my WebApi.
With this tutorial:

https://www.strathweb.com/2013/01/replace-json-net-with-servicestack-text-in-asp-net-web-api/

Localhost and in debug-mode all went well, until I deployed it to our server, it says:

MissingMethodException

[MissingMethodException: Method not found: "System.Collections.ObjectModel.Collection<System.Net.Http.DelegatingHandler> System.Web.Http.HttpConfiguration.get_MessageHandlers()".]

It happens at Application_Start().

protected void Application_Start()

{

    GlobalConfiguration.Configure(WebApiConfig.Register);



}

Thats my replacement:

public class ServiceStackTextFormatter : JsonMediaTypeFormatter

{

    public ServiceStackTextFormatter()

    {

        JsConfig.DateHandler = DateHandler.ISO8601;

        SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/json"));



        SupportedEncodings.Add(new UTF8Encoding(encoderShouldEmitUTF8Identifier: false, throwOnInvalidBytes: true));

        SupportedEncodings.Add(new UnicodeEncoding(bigEndian: false, byteOrderMark: true, throwOnInvalidBytes: true));

    }



    public override bool CanReadType(Type type)

    {

        if (type == null) throw new ArgumentNullException("type");

        return true;

    }



    public override bool CanWriteType(Type type)

    {

        if (type == null) throw new ArgumentNullException("type");

        return true;

    }



    public override Task<object> ReadFromStreamAsync(Type type, Stream readStream, System.Net.Http.HttpContent content, IFormatterLogger formatterLogger)

    {

        var task = Task<object>.Factory.StartNew(() => JsonSerializer.DeserializeFromStream(type, readStream));

        return task;

    }



    public override Task WriteToStreamAsync(Type type, object value, Stream writeStream, System.Net.Http.HttpContent content, TransportContext transportContext)

    {

        var task = Task.Factory.StartNew(() => JsonSerializer.SerializeToStream(value, type, writeStream));

        return task;

    }

}

And my Register method:

public static void Register(HttpConfiguration config)

    {

        // see this: https://www.strathweb.com/2013/01/replace-json-net-with-servicestack-text-in-asp-net-web-api/

        // and this: https://www.radenkozec.com/8-ways-improve-asp-net-web-api-performance/

        // ServiceStackText is much faster than JSON.NET

        config.Formatters.RemoveAt(0);

        config.Formatters.Insert(0, new ServiceStackTextFormatter());



        // add Handler to send data chunked

        config.MessageHandlers.Add(new Handler());



        // Web API configuration and services

        config.SuppressDefaultHostAuthentication();

        config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));



        // Web API routes

        config.MapHttpAttributeRoutes();



        config.EnableCors();      // needed to disable this, otherwise we do not get a access-origin-header in the client



        config.Formatters[0].SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/json"));

        config.Formatters[0].SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/plain"));

        config.Formatters[0].SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));



        (config.Formatters[0] as ServiceStackTextFormatter).SerializerSettings.TypeNameHandling = TypeNameHandling.Auto;

    }

So I made some progress. The problem was not caused by the ServiceStack-JSON-Serializer, it´s caused by my Handler which is:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net.Http;

using System.Threading;

using System.Threading.Tasks;

using System.Web;



namespace akiliBase.Rest.RestAPI.Models

{

    public class Handler : DelegatingHandler

    {

        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request,

            CancellationToken cancellationToken)

        {

            var response = base.SendAsync(request, cancellationToken);



            response.Result.Headers.TransferEncodingChunked = true; // Here!



            return response;

        }

    }

}

So I deleted this line and will aks another question about this.
Now I get the following error:

[MissingMethodException: Method not found:
"System.Collections.ObjectModel.Collection`1
System.Net.Http.Formatting.MediaTypeFormatter.get_SupportedMediaTypes()".]

which is caused by the following lines:

config.Formatters[0].SupportedMediaTypes.Add(new MediaTypeHeaderValue("application/json"));

config.Formatters[0].SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/plain"));

config.Formatters[0].SupportedMediaTypes.Add(new MediaTypeHeaderValue("text/html"));

So it seams in System.Net.Http.Formatting.MediaTypeFormatter the getter for SupportedMediaTypes is missing. I also think the whole problem is caused in Web.config where some wrong assambly´s are referenced or something. So here is my web.config-runtime-tag:

<runtime>

<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">

  <dependentAssembly>

    <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-11.0.0.0" newVersion="11.0.0.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="Microsoft.Build.Framework" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-15.1.0.0" newVersion="15.1.0.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="System" publicKeyToken="b77a5c561934e089" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="Microsoft.Owin" publicKeyToken="31bf3856ad364e35" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="System.Net.Http.Formatting" publicKeyToken="31bf3856ad364e35" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-5.2.4.0" newVersion="5.2.4.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="System.Web.Http" publicKeyToken="31bf3856ad364e35" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-5.2.4.0" newVersion="5.2.4.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="Microsoft.Owin.Security" publicKeyToken="31bf3856ad364e35" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="Microsoft.Owin.Security.OAuth" publicKeyToken="31bf3856ad364e35" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="System.Web.Cors" publicKeyToken="31bf3856ad364e35" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-5.2.6.0" newVersion="5.2.6.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="Microsoft.Owin.Security.Cookies" publicKeyToken="31bf3856ad364e35" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-4.0.0.0" newVersion="4.0.0.0" />

  </dependentAssembly>

  <dependentAssembly>

    <assemblyIdentity name="ZedGraph" publicKeyToken="02a83cbd123fcd60" culture="neutral" />

    <bindingRedirect oldVersion="0.0.0.0-5.1.7.430" newVersion="5.1.7.430" />

  </dependentAssembly>

</assemblyBinding>