Provides to pet-owners an ability to lead a social life of their pets just like people do in social networks.

Have to add .env file with settings like those :

HOST_POSTGRES=db
PORT_POSTGRES=5432
POSTGRES_USER=postgres
POSTGRES_PASSWORD=root
POSTGRES_DB=pet-book
APP_ADDRESS=http://localhost
APP_PORT=8080
GOOGLE_CALLBACK=loginGoogleCallback
GOOGLE_CLIENT_ID=client_id
GOOGLE_CLIENT_SECRET=client_secret

How to use middleware and context?

There are three routers: basicRouter, authRouter and petRouter.

basicRouter router is a really basic router, which is not wrapped into any middleware and handles user login, registration and logout.

authRouter router is wrapped into AuthMiddleware middleware. This router takes one parameter with type *models.RefreshTokenStore, which is responsible for an access to database and operations on corresponding table. This middleware checks whether user is authenticated or not.
authRouter := router.PathPrefix("/").Subrouter() authRouter.Use(authentication.AuthMiddleware(&storeRefreshToken, &storeUser))

petRouter is a subrouter of authRouter and it is wrapped into PetMiddleware. The point of this router is to restrict users from certain endpoints that are only allowed to users, who have registered their pets. It takes one parameter with type *models.UserStore.

If you want to wrap your handler in middleware, you should simply handle functions on router like this:
authRouter.HandleFunc("/mypage", controller.MyPageGetHandler()).Methods("GET")

Context is passed to handler from middleware and there is one key - id. id is an int value and it represents an id of logged in user. Get user_id in your handlers like this:
context.Get(r, "id").(int)