Gin How can a user-related data stored for an interval of one request.

I'm building a Rest API with Gin and I want to store currently logged-in user's roles somewhere I can reach within the application for each request to check that user's permission for the requested operation.

When a request comes, the application gets JWT from Gin Context, and with that token, the application extracts the ID and roles of that user. I want to put those roles somewhere I can reach from other parts of the application such as permission check service.

How can I achieve that?

Comment From: nesselchen

You've probably figured this out by now but you can store the ID in the key-value store inside the gin.Context. Just store it using ctx.Set and retrieve it with ctx.Get. gin even has some custom getters (GetInt, GetString) that return the specified type instead of interface{}.

It is then common practice to pass the extracted value to a function or method that handles the specific use case. So don't pass your gin.Context around your whole request chain, instead, get the user ID inside a middleware, extract it from the gin.Context inside your handler and then pass the ID to a service.