Getting ScriptHandlerFactory handler

Question

Is there any way to call System.Web.Script.Services.ScriptHandlerFactory class GetHandler method which return IHttpHandler type object. I know ScriptHandlerFactory is an internal class but is therey any other way from where I can get it? The reason I am saying is because I want to route my .asmx paths and routing needs this type of code:

    public IHttpHandler GetHttpHandler(RequestContext requestContext)
{
   return new WebServiceHandlerFactory().GetHandler(HttpContext.Current,
        "*",
        _VirtualPath,
        HttpContext.Current.Server.MapPath(_VirtualPath));
   }
}

Above "WebServiceHandlerFactory" is used but I want to use ScriptHandlerFactory only since I want to make use of jquery ajax calls too. I will be calling the asmx methods via jquery ajax calls. Can you help me in doing so?

try inheriting from IHttpHandlerFactory? then you can do something like public virtual IHttpHandler GetHandler(HttpContext context, String requestType, String url, String pathTranslated) { return (IHttpHandler)aspxPage; } — Dmitry Savy, Feb 15 '12 at 15:24
Dmitry, you can't inherit an interface. You can only implement it. Unfortunately, ASP.NET made a lot of classes internal, which is a huge pain. Like in my instance (see my answer), I needed the default functionality, but then I needed to be able to pass it to an IoC provider to build-up the properties. I couldn't do that without resorting to reflection. — Chris Benard, Mar 08 '12 at 19:21

score 1 · Answer 1 · edited Jun 20 '20 at 09:12

Borrowed from Spring.Net. I use it to access the SimpleHttpHandler because I use IoC to create HttpHandlers.

Edit: This is the code that I used to figure out how to do it. Obviously, it requires full trust, and I didn't like this hack, but ASP.NET didn't make it easy for me to do IoC when creating my own handler factory that needed to rely on built-in functionality.

Edit 2: Fixed the fully qualified type name to System.Web.Services.Protocols.WebServiceHandlerFactory. Fixed the assembly search from searching for IHttpHandler which is in System.Web to WebService which is in System.Web.Services. Let me know if you have any issues.

Edit 3: Sorry about this. I left out the SecurityCritical class they use, which you can do another way if you want, but I just copied straight from them when I did it. It is used to elevate and assert permissions, which is why you need full trust.

Code

    static YourCodeHere()
    {
        PrivilegedCommand cmd = new PrivilegedCommand();
        SecurityCritical.ExecutePrivileged(new PermissionSet(PermissionState.Unrestricted), new SecurityCritical.PrivilegedCallback(cmd.Execute));
        handlerFactory = cmd.Result;
    }

    private class PrivilegedCommand
    {
        public IHttpHandlerFactory Result = null;

        public void Execute()
        {
            Type handlerFactoryType = typeof(System.Web.Services.WebService).Assembly.GetType("System.Web.Services.Protocols.WebServiceHandlerFactory");
            Result = (IHttpHandlerFactory)Activator.CreateInstance(handlerFactoryType, true);
        }
    }

/// <summary>
/// Utility class to be used from within this assembly for executing security critical code 
/// NEVER EVER MAKE THIS PUBLIC!
/// </summary>
/// <author>Erich Eichinger</author>
internal class SecurityCritical
{
    internal delegate void PrivilegedCallback();

    [SecurityCritical, SecurityTreatAsSafe]
    [MethodImpl(MethodImplOptions.NoInlining)]
    internal static void ExecutePrivileged(IStackWalk permission, PrivilegedCallback callback)
    {
        permission.Assert();
        try
        {
            callback();
        }
        finally
        {
            CodeAccessPermission.RevertAssert();
        }
    }
}

Getting ScriptHandlerFactory handler

1 Answers1

Code

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