`UserInfo` endpoint lookup never returns

As part of the OIDC login flow, during the backchannel exchange to get the access and id token (assuming you are in the auth code flow, but that's not relevant to the issue), one can perform a check against the UserInfo endpoint of the OIDC provider to check that the sub claim of the obtained ID token matches the one of the userinfo associated to the access token.

However, in the case of NSS, a lookup at https://inrupt.net/.well-known/openid-configuration shows that the userinfo endpoint exists, but a GET to https://inrupt.net/userinfo just hangs, and never get either a success or an error response. This prevents proper functioning of some OIDC libraries, and requires to be worked around. Should this be fixed in the NSS repo, or rather at the oidc-op level ?

Tái hiện yêu cầu GET bị treo tại https://inrupt.net/userinfo và so sánh với endpoint được quảng bá trong https://inrupt.net/.well-known/openid-configuration. Theo dõi xem NSS hay oidc-op sở hữu hành vi UserInfo; hoàn thành có nghĩa là endpoint trả về phản hồi thành công hoặc phản hồi lỗi để các thư viện OIDC có thể hoàn tất việc xác thực.