Question

1. How can I force a file to be opened in read-only mode in cases where a certain custom document status applies? For instance, a document can go through various stages: created, reviewed, approved. Once it’s approved nobody can modify it.

2. How do I tell a client through the WebDAV Server Engine for .NET api that certain operations are not supported, for instance moving and copying files.

Answer 1

If you want to forbid copy and move operations in all cases, do it this way:

public override void CopyTo(IItemCollection folder, string destName, bool deep, MultistatusException multistatus)
{
    throw new DavException("Cannot copy resource", DavStatus.NOT_ALLOWED);
}

public override void MoveTo(IItemCollection folder, string destName, MultistatusException multistatus)
{
    throw new DavException("Cannot move resource", DavStatus.NOT_ALLOWED);
}

If you want to forbid copy/move/change a resource basing on some condition, I’ll recommend you to use custom handlers:

public Service(ILogger logger, bool isApplication)
{
    ...
    MyCustomPutHandler handler = new MyCustomPutHandler();
    handler.OriginalHandler = engine.RegisterMethodHandler("PUT", handler);
}

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

    public void ProcessRequest(DavContextBase context, IHierarchyItem item)
    {
        if(<check condition>)
        {
            throw new DavException("Cannot change resource", DavStatus.Conflict);
        }
        if (item is IFolder)
        {
            ...
        }
        else
        {
            OriginalHandler.ProcessRequest(context, item);
        }
    }
     ......
}

Hope this will help you.