public override async Task <Tuple <bool, INuGetResource> > TryCreate(
            SourceRepository source,
            CancellationToken token)
        {
            ListResource resource = null;

            var serviceIndex = await source.GetResourceAsync <ServiceIndexResourceV3>(token);

            if (serviceIndex != null)
            {
                var baseUrl = serviceIndex.GetServiceEntryUri(ServiceTypes.LegacyGallery);
                if (baseUrl != null)
                {
                    var httpSource = await source.GetResourceAsync <HttpSourceResource>(token);

                    var serviceDocument =
                        await ODataServiceDocumentUtils.CreateODataServiceDocumentResourceV2(
                            baseUrl.AbsoluteUri, httpSource.HttpSource, DateTime.UtcNow, NullLogger.Instance, token);

                    var parser = new V2FeedParser(httpSource.HttpSource, serviceDocument.BaseAddress, source.PackageSource.Source);
                    var feedCapabilityResource = new LegacyFeedCapabilityResourceV2Feed(parser, serviceDocument.BaseAddress);
                    resource = new V2FeedListResource(parser, feedCapabilityResource, serviceDocument.BaseAddress);
                }
            }

            var result = new Tuple <bool, INuGetResource>(resource != null, resource);

            return(result);
        }
        public override async Task <Tuple <bool, INuGetResource> > TryCreate(SourceRepository source,
                                                                             CancellationToken token)
        {
            ListResource resource = null;

            if (await source.GetFeedType(token) == FeedType.HttpV2)
            {
                var httpSource = await source.GetResourceAsync <HttpSourceResource>(token);

                var serviceDocument = await source.GetResourceAsync <ODataServiceDocumentResourceV2>(token);

                if (serviceDocument != null)
                {
                    var parser = new V2FeedParser(httpSource.HttpSource, serviceDocument.BaseAddress,
                                                  source.PackageSource.Source);
                    var feedCapabilityResource = new LegacyFeedCapabilityResourceV2Feed(parser,
                                                                                        serviceDocument.BaseAddress);
                    resource = new V2FeedListResource(parser, feedCapabilityResource, serviceDocument.BaseAddress);
                }
            }
            return(new Tuple <bool, INuGetResource>(resource != null, resource));
        }