Golang request middleware library? - go

Question

I'm using gorrilla mux for my mux for my routing setup.
Is there any open source library that will provide some sort of request middleware?
router.HandleFunc("/products", GetProducts).Methods("GET")
So currently I have the GetProducts function that will return the products etc.
But this is a REST api that I am building, so I have to handle things like loading the user, verifying the 'api token' for the request etc.
I don't want to do this for each and every method so I was hoping I there was some request middleware when I can do this before/after execution, along with adding things like User, Permissions to the context in each middleware function.

Answer 1

You can use Go Gin HTTP web framework that supports middlewares as well as you want:
Using middleware:
func main() {
// Creates a router without any middleware by default
r := gin.New()
// Global middleware
// Logger middleware will write the logs to gin.DefaultWriter even you set with GIN_MODE=release.
// By default gin.DefaultWriter = os.Stdout
r.Use(gin.Logger())
// Recovery middleware recovers from any panics and writes a 500 if there was one.
r.Use(gin.Recovery())
// Per route middleware, you can add as many as you desire.
r.GET("/benchmark", MyBenchLogger(), benchEndpoint)
// Authorization group
// authorized := r.Group("/", AuthRequired())
// exactly the same as:
authorized := r.Group("/")
// per group middleware! in this case we use the custom created
// AuthRequired() middleware just in the "authorized" group.
authorized.Use(AuthRequired())
{
authorized.POST("/login", loginEndpoint)
authorized.POST("/submit", submitEndpoint)
authorized.POST("/read", readEndpoint)
// nested group
testing := authorized.Group("testing")
testing.GET("/analytics", analyticsEndpoint)
}
// Listen and serve on 0.0.0.0:8080
r.Run(":8080")
}