Chain combines a series of middleware functions that will be applied in the same order.

CORS is a middleware function that sets the appropriate CORS headers on a browser response (not counting Access-Control-Allow-Methods, which is set by gorilla/mux's CORS middleware based on the route handlers we've defined).

CountBrowserConns is a middleware function that increments the total number of browser connections, and also increments the number of active browser connections until the handler ends.

CountMobileConns is a middleware function that increments the total number of mobile connections, and also increments the number of active mobile connections until the handler ends.

CountServerConns is a middleware function that increments the total number of server-side connections, and also increments the number of active server-side connections until the handler ends.

GetEnvContextInfo returns the EnvContextInfo that is attached to the specified Context (normally obtained from a request as request.Context()).

RequestCount is a middleware function that increments the specified metric for each request.

SelectEnvironmentByAuthorizationKey creates a middleware function that attempts to authenticate the request using the appropriate kind of credential for the basictypes.SDKKind.

Streaming is a middleware function that sets the appropriate headers on a streaming response.

UserFromBase64 decodes a base64-encoded go-server-sdk user.

WithEnvContextInfo returns a new Context with the EnvContextInfo added.

EnvContextInfo is data that we attach to the current HTTP request to indicate which environment it is related to.

RelayEnvironments defines the methods for looking up environments.