Error validating access token
In the real world, there are two formats in common usage: After authentication, a client presents its access token with each HTTP request to gain access to protected resources.
Validation of the access token is required to ensure that it was indeed issued by a trusted identity provider (Id P) and that it has not expired.
These are authentication credentials passed from client to API server, and typically carried as an HTTP header.
OAuth 2.0, however, is a maze of interconnecting standards.
Note that the access token sent in the introspection request is a component of the body defined in line 14.
Here function makes an HTTP subrequest (line 2) to another location (/oauth2_send_request) which is defined in the configuration snippet below.
NGINX and NGINX Plus can offer optimizations to this drawback by caching the introspection responses.A complete solution with comprehensive error handling and logging is provided below.The subrequest target location defined in line 2 looks very much like our original All of the configuration to construct the token introspection request is contained within the /_oauth2_send_request location.Because Id Ps cryptographically sign the JWTs they issue, JWTs can be validated “offline” without a runtime dependency on the Id P.Typically, a JWT also includes an expiry date which can also be checked.