Basically, I want to write one middleware which closes transaction object is created while a request. I am using gorilla mux package. I am familiar with python-Django middlewares and it gives proper handling of error or response. but not able to find anything similar with golang
In Go lang you can create a middle-ware too, below I've written the process to create handler as validateMiddleware then called it when TestEndpoint API requested.
func main() {
router := mux.NewRouter()
router.HandleFunc("/test", ValidateMiddleware(TestEndpoint)).Methods("GET")
log.Fatal(http.ListenAndServe(":12345", router))
}
And now you can create your validateMiddleware handler as:
func ValidateMiddleware(next http.HandlerFunc) http.HandlerFunc {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
authorizationHeader := req.Header.Get("authorization")
if authorizationHeader != "" {
// if true, then request for next handler.
next(w, req)
} else {
json.NewEncoder(w).Encode(Exception{Message: "Invalid authorization token"})
return
}
})
}
And finally create original requested handler TestEndpoint
func TestEndpoint(w http.ResponseWriter, req *http.Request) {
fmt.Println("Hello Go middleware!!!")
}