source: TFP-WebServer/WebServer/src/UrlHandlers/AbsHandler.cs@ 442

using Webserver.Permissions;

namespace Webserver.UrlHandlers {
        public abstract class AbsHandler {
                public readonly string ModuleName;
                protected string urlBasePath;
                protected Web parent;

                public string UrlBasePath => urlBasePath;

                protected AbsHandler (string _moduleName, int _defaultPermissionLevel = 0) {
                        ModuleName = _moduleName;
                        AdminWebModules.Instance.AddKnownModule (new AdminWebModules.WebModule(_moduleName, _defaultPermissionLevel, true));
                }

                public abstract void HandleRequest (RequestContext _context);

                public virtual bool IsAuthorizedForHandler (RequestContext _context) {
                        return ModuleName == null || AdminWebModules.Instance.ModuleAllowedWithLevel (ModuleName, _context.PermissionLevel);
                }

                public virtual void Shutdown () {
                }

                public virtual void SetBasePathAndParent (Web _parent, string _relativePath) {
                        parent = _parent;
                        urlBasePath = _relativePath;
                }
        }
}