IMethodHandler Interface

public interface IMethodHandler

Public Interface IMethodHandler

public interface class IMethodHandler

type IMethodHandler =  interface end

internal class MyCustomGetHandler : IMethodHandler
{
    public IMethodHandler OriginalHandler { get; set; }

    public bool EnableOutputBuffering
    {
        get { return false; }
    }

    public bool EnableOutputDebugLogging
    {
        get { return false; }
    }

    public bool EnableInputDebugLogging
    {
        get { return false; }
    }

    public void ProcessRequest(DavContextBase context, IHierarchyItem item)
    {
        string htmlPath = HttpContext.Current.Request.MapPath("/");

        if (item is IItemCollection)
        {
            // In case of GET requests to WebDAV folders we serve a web page to display 
            // any information about this server and how to use it.

            // Remember to call EnsureBeforeResponseWasCalled here if your context implementation
            // makes some useful things in BeforeResponseAsync.
            context.EnsureBeforeResponseWasCalled();

            // Request to iOS/OS X CalDAV/CardDAV profile.
            if (context.Request.RawUrl.EndsWith("?connect"))
            {
                WriteProfile(context, item, htmlPath);
                return;
            }
            IHttpAsyncHandler page = (IHttpAsyncHandler)System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(
                "~/MyCustomHandlerPage.aspx", typeof(MyCustomHandlerPage));
            page.ProcessRequest(HttpContext.Current);
        }
        else
        {
            OriginalHandler.ProcessRequest(context, item);
        }
    }

    public bool AppliesTo(IHierarchyItem item)
    {
        return item is IFolder || OriginalHandler.AppliesTo(item);
    }

    private void WriteProfile(DavContextBase context, IHierarchyItem item, string htmlPath)
    {
        string mobileconfigFileName = null;
        string decription = null;
        if (item is IAddressbookFolder)
        {
            mobileconfigFileName = "CardDAV.AppleProfileTemplete.mobileconfig";
            decription = (item as IAddressbookFolder).AddressbookDescription;
        }

        decription = !string.IsNullOrEmpty(decription) ? decription : item.Name;

        string templateContent = null;
        using (TextReader reader = new StreamReader(Path.Combine(htmlPath, mobileconfigFileName)))
        {
            templateContent = reader.ReadToEnd();
        }

        Uri url = new Uri(context.Request.UrlPrefix);

        string payloadUUID = item.Path.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries).Last(); // PayloadUUID

        string profile = string.Format(templateContent
            , url.Host // host name
            , item.Path // CalDAV / CardDAV Principal URL. Here we can return ((item as ICurrentUserPrincipal).GetCurrentUserPrincipal()).Path if needed.
            , (context as DavContext).UserName // user name
            , url.Port // port                
            , (url.Scheme == "https").ToString().ToLower() // SSL
            , decription // CardDAV / CardDAV Account Description
            , Assembly.GetAssembly(this.GetType()).GetName().Version.ToString()
            , Assembly.GetAssembly(typeof(DavEngine)).GetName().Version.ToString()
            , payloadUUID
            );

        byte[] profileBytes = SignProfile(context, profile);

        context.Response.ContentType = "application/x-apple-aspen-config";
        context.Response.AddHeader("Content-Disposition", "attachment; filename=profile.mobileconfig");
        context.Response.ContentLength = profileBytes.Length;
        using (BinaryWriter writer = new BinaryWriter(context.Response.OutputStream))
        {
            writer.Write(profileBytes);
        }
    }

    private byte[] SignProfile(DavContextBase context, string profile)
    {
        // Here you will sign your profile with SSL certificate to avoid "Unsigned" warning on iOS and OS X.
        // For demo purposes we just return the profile content unmodified.
        return context.Engine.ContentEncoding.GetBytes(profile);
    }
}