Incompatible URLs used when downloading from NuGet.org

Hey there.

I'm a PM on the NuGet.org team and I wanted to reach out

NuGet.org is migrating towards a new multi-CDN infrastructure: NuGet/Announcements#60

Going forward, not all of our CDN providers will support case insensitive URLs. As a result, nuget.org's V3 API to download packages’ content will only support lowercased package ID and version values, as documented here: https://docs.microsoft.com/en-us/nuget/api/package-base-address-resource

For example:

❌ https://api.nuget.org/v3-flatcontainer/Newtonsoft.Json/13.0.1-Beta1/Newtonsoft.Json.13.0.1-Beta1.nupkg

✔ https://api.nuget.org/v3-flatcontainer/newtonsoft.json/13.0.1-beta1/newtonsoft.json.13.0.1-beta1.nupkg

Recently we received requests with uppercased package ID or versions from a client with user agent “Paket”. We recommend you update your project to use lowercased package ID and versions when downloading packages’ content using nuget.org’s V3 API.

Feel free to reach out to us at support@nuget.org or on GitHub at https://github.com/NuGet/NuGetGallery/issues if you have any questions or concerns.

Best regards,

NuGet Team

Read the NuGet V3 package base-address documentation and trace how Paket constructs package download URLs. Done means downloads use lowercased package IDs and versions, matching the URL format required by NuGet.org.