Continue reset form on bad entry

reset.go

@@ -12,20 +12,24 @@ func resetPassword(w http.ResponseWriter, r *http.Request) {
 		http.Redirect(w, r, "lost", http.StatusFound)
 	}
 
+	base := map[string]interface{}{
+		"login": r.URL.Query().Get("l"),
+		"token": strings.Replace(r.URL.Query().Get("t"), " ", "+", -1),
+	}
+
 	if r.Method != "POST" {
-		displayTmpl(w, "reset.html", map[string]interface{}{
+		displayTmpl(w, "reset.html", base)
-			"login": r.URL.Query().Get("l"),
-			"token": strings.Replace(r.URL.Query().Get("t"), " ", "+", -1),
-		})
 		return
 	}
 
 	// Check the two new passwords are identical
 	if r.PostFormValue("newpassword") != r.PostFormValue("new2password") {
-		displayTmplError(w, http.StatusNotAcceptable, "reset.html", map[string]interface{}{"error": "New passwords are not identical. Please retry."})
+		base["error"] = "New passwords are not identical. Please retry."
+		displayTmplError(w, http.StatusNotAcceptable, "reset.html", base)
 		return
 	} else if err := checkPasswdConstraint(r.PostFormValue("newpassword")); err != nil {
-		displayTmplError(w, http.StatusNotAcceptable, "reset.html", map[string]interface{}{"error": "The password you chose doesn't respect all constraints: " + err.Error()})
+		base["error"] = "The password you chose doesn't respect all constraints: " + err.Error()
+		displayTmplError(w, http.StatusNotAcceptable, "reset.html", base)
 		return
 	}
 
@@ -33,7 +37,8 @@ func resetPassword(w http.ResponseWriter, r *http.Request) {
 	conn, err := myLDAP.Connect()
 	if err != nil || conn == nil {
 		log.Println(err)
-		displayTmplError(w, http.StatusInternalServerError, "reset.html", map[string]interface{}{"error": err.Error()})
+		base["error"] = err.Error()
+		displayTmplError(w, http.StatusInternalServerError, "reset.html", base)
 		return
 	}
 
@@ -41,7 +46,8 @@ func resetPassword(w http.ResponseWriter, r *http.Request) {
 	err = conn.ServiceBind()
 	if err != nil {
 		log.Println(err)
-		displayTmplError(w, http.StatusInternalServerError, "reset.html", map[string]interface{}{"error": err.Error()})
+		base["error"] = err.Error()
+		displayTmplError(w, http.StatusInternalServerError, "reset.html", base)
 		return
 	}
 
@@ -49,20 +55,23 @@ func resetPassword(w http.ResponseWriter, r *http.Request) {
 	dn, err := conn.SearchDN(r.PostFormValue("login"))
 	if err != nil {
 		log.Println(err)
-		displayTmplError(w, http.StatusInternalServerError, "reset.html", map[string]interface{}{"error": err.Error()})
+		base["error"] = err.Error()
+		displayTmplError(w, http.StatusInternalServerError, "reset.html", base)
 		return
 	}
 
 	// Check token validity (allow current token + last one)
 	if conn.genToken(dn, false) != r.PostFormValue("token") && conn.genToken(dn, true) != r.PostFormValue("token") {
-		displayTmplError(w, http.StatusNotAcceptable, "reset.html", map[string]interface{}{"error": "Token invalid, please retry the lost password procedure. Please note that our token expires after 1 hour."})
+		base["error"] = "Token invalid, please retry the lost password procedure. Please note that our token expires after 1 hour."
+		displayTmplError(w, http.StatusNotAcceptable, "reset.html", base)
 		return
 	}
 
 	// Replace the password by the new given
 	if err := conn.ChangePassword(dn, r.PostFormValue("newpassword")); err != nil {
 		log.Println(err)
-		displayTmplError(w, http.StatusInternalServerError, "reset.html", map[string]interface{}{"error": err.Error()})
+		base["error"] = err.Error()
+		displayTmplError(w, http.StatusInternalServerError, "reset.html", base)
 		return
 	}
 

static/reset.html

@@ -1,7 +1,7 @@
 {{template "header"}}
   <h1 class="display-4">Forgot your password? <small class="text-muted">Define a new one!</small></h1>
 
-  <form method="post" action="reset">
+  <form method="post" action="reset?l={{ .login }}&t={{ .token }}">
     {{if .error}}<div class="alert alert-danger" role="alert">{{.error}}</div>{{end}}
     <div class="form-group">
       <input required="" class="form-control" id="input_0" type="text" placeholder="Email" value="{{ .login }}" disabled="">