Within a global request to request a context mapping solution, there is a single data structure in which you can look up the context for a request. The most popular implementation of this can be found within the Gorilla web toolkit, which can be found here: https://github.com/gorilla/context.
At a very high level, this code creates a single map[*http.Request]map[interface{}]interface{} global variable, which is available through the helper Get and Set functions. When used, if you 'Set' some contextual variable, the code will create a new map[interface{}]interface{}, and uses the request pointer of the request the contextual information belongs to as a map key in the global map, the value of which would ...
