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Protect gorilla/mux Subroute with basic auth
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| package main | |
| /* | |
| * This Gist and it's other versions are from: | |
| * | |
| * https://stackoverflow.com/questions/42321789/unable-to-protect-gorilla-mux-subroute-with-basic-auth | |
| */ | |
| import ( | |
| "crypto/subtle" | |
| "encoding/json" | |
| "log" | |
| "net/http" | |
| "github.com/gorilla/mux" | |
| "github.com/urfave/negroni" | |
| ) | |
| func endAPICall(w http.ResponseWriter, httpStatus int, anyStruct interface{}) { | |
| result, err := json.MarshalIndent(anyStruct, "", " ") | |
| if err != nil { | |
| http.Error(w, err.Error(), http.StatusInternalServerError) | |
| return | |
| } | |
| w.WriteHeader(httpStatus) | |
| w.Write(result) | |
| } | |
| func BasicAuth(w http.ResponseWriter, r *http.Request, username, password, realm string) bool { | |
| user, pass, ok := r.BasicAuth() | |
| if !ok || subtle.ConstantTimeCompare([]byte(user), []byte(username)) != 1 || subtle.ConstantTimeCompare([]byte(pass), []byte(password)) != 1 { | |
| w.Header().Set("WWW-Authenticate", `Basic realm="`+realm+`"`) | |
| w.WriteHeader(401) | |
| w.Write([]byte("Unauthorised.\n")) | |
| return false | |
| } | |
| return true | |
| } | |
| func routers() *mux.Router { | |
| username := "apiuser" | |
| password := "apipass" | |
| v2Path := "/v2" | |
| healthPath := "/health" | |
| topRouter := mux.NewRouter().StrictSlash(true) | |
| healthRouter := mux.NewRouter().PathPrefix(healthPath).Subrouter().StrictSlash(true) | |
| v2Router := mux.NewRouter().PathPrefix(v2Path).Subrouter().StrictSlash(true) | |
| healthRouter.HandleFunc("/ping", func(w http.ResponseWriter, r *http.Request) { | |
| endAPICall(w, 200, "PONG") | |
| }) | |
| v2Router.HandleFunc("/smallcat", func(w http.ResponseWriter, r *http.Request) { | |
| endAPICall(w, 200, "Small Meow") | |
| }) | |
| bigMeowFn := func(w http.ResponseWriter, r *http.Request) { | |
| endAPICall(w, 200, "Big MEOW") | |
| } | |
| v2Router.HandleFunc("/bigcat", bigMeowFn) | |
| topRouter.PathPrefix(healthPath).Handler(negroni.New( | |
| /* Health-check routes are unprotected */ | |
| negroni.Wrap(healthRouter), | |
| )) | |
| topRouter.PathPrefix(v2Path).Handler(negroni.New( | |
| negroni.HandlerFunc(func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) { | |
| if BasicAuth(w, r, username, password, "Provide user name and password") { | |
| /* Call the next handler iff Basic-Auth succeeded */ | |
| next(w, r) | |
| } | |
| }), | |
| negroni.Wrap(v2Router), | |
| )) | |
| return topRouter | |
| } | |
| func main() { | |
| if r := routers(); r != nil { | |
| log.Fatal("Server exited:", http.ListenAndServe(":3000", r)) | |
| } | |
| } |
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