Login form handling

auth/auth.go

@@ -1,27 +1,51 @@
 package auth
 
 import (
+	_ "embed"
 	"fmt"
 	"net/http"
 )
 
+//go:embed  login.html
+var loginPage string
+
+//go:embed wrongPassword.html
+var wrongPassword string
+
 type Authenticator struct {
 }
 
-func (a *Authenticator) Authenticate(in http.HandlerFunc) http.HandlerFunc {
+func (a *Authenticator) login(w http.ResponseWriter, r *http.Request) {
-	return func(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
-		if r.URL.String() == "/loginok" {
+		w.Header().Set("content-type", "text/html")
+		fmt.Fprint(w, loginPage)
+		return
+	}
+	err := r.ParseForm()
+	if err != nil {
+		w.Header().Set("content-type", "text/html")
+		fmt.Fprint(w, loginPage)
+		return
+	}
+	login := r.PostFormValue("login")
+	password := r.PostFormValue("password")
+	if login != "admin" || password != "secret" {
+		w.Header().Set("content-type", "text/html")
+		fmt.Fprint(w, wrongPassword)
+		return
+	}
 	c := http.Cookie{
 		Name:  "token",
 		Value: "good",
 	}
 	http.SetCookie(w, &c)
 	http.Redirect(w, r, "/", http.StatusFound)
-			return
+}
-		}
+
+func (a *Authenticator) Authenticate(in http.HandlerFunc) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
 		if r.URL.String() == "/login" {
-			w.Header().Set("content-type", "text/html")
+			a.login(w, r)
-			fmt.Fprint(w, "<a href='/loginok'>Login</a>")
 			return
 		}
 		if _, err := r.Cookie("token"); err != nil {