fix nuget

NuGet/NuGetClient.cs

@@ -1,4 +1,5 @@
-using System.Net.Http.Json;
+using System.Net;
+using System.Net.Http.Json;
 using System.Text.Json;
 using NuGet.Converters;
 using NuGet.Models;
@@ -32,8 +33,9 @@ public class NuGetClient
 
     public Task<Stream> GetPackageContentStreamAsync(string id, NuGetVersion version)
     {
+        id = id.ToLower();
         return _client.GetStreamAsync(new Uri(_packageBaseAddress,
-            new Uri($"{id.ToLower()}/{version}.nupkg", UriKind.Relative)));
+            new Uri($"{id}/{version}/{id}.{version}.nupkg", UriKind.Relative)));
     }
 
     public Task<Registration> GetPackageRegistrationAsync(string id, NuGetVersion version)
@@ -61,12 +63,20 @@ public class NuGetClient
 
     public static async Task<NuGetClient> CreateFromIndexUrlAsync(string indexUrl)
     {
-        var client = new HttpClient();
+        var client = new HttpClient(new HttpClientHandler
+        {
+            AutomaticDecompression = DecompressionMethods.All
+        });
 
         var index = await client.GetFromJsonAsync<NuGetIndex>(indexUrl, SerializerOptions);
         
         var (packageBaseAddress, _, _) = index!.Resources.First(b => b.Type.Id == "PackageBaseAddress");
         var (registration, _, _) = index!.Resources.First(b => b.Type.Id == "RegistrationsBaseUrl");
+
+        if (!packageBaseAddress.EndsWith('/'))
+            packageBaseAddress += '/';
+        if (!registration.EndsWith('/'))
+            registration += '/';
         
         return new NuGetClient(client, new Uri(packageBaseAddress), new Uri(registration));
     }