normalize_string.go

/*
Copyright 2021 The KEDA Authors

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package util

import (
	"net/url"
	"strings"
)

type urlPart string

const (
	// Hostname is a constant refers to the hostname part of the url
	Hostname urlPart = "Hostname"
	// Password is a constant that refers to a password portion of the url if there is one
	Password urlPart = "Password"
)

// NormalizeString will replace all slashes, dots, colons and percent signs with dashes
func NormalizeString(s string) string {
	s = strings.ReplaceAll(s, "/", "-")
	s = strings.ReplaceAll(s, ".", "-")
	s = strings.ReplaceAll(s, ":", "-")
	s = strings.ReplaceAll(s, "%", "-")
	return s
}

// MaskPartOfURL will parse a url and returned a masked version or an error
func MaskPartOfURL(s string, part urlPart) (string, error) {
	url, err := url.Parse(s)
	if err != nil {
		return "", err
	}

	var partOfURL string
	switch part {
	case Hostname:
		hostname := url.Hostname()
		partOfURL = hostname
	case Password:
		password, ok := url.User.Password()
		if ok {
			partOfURL = password
		}
	}

	if partOfURL != "" {
		return strings.ReplaceAll(s, partOfURL, "xxx"), nil
	}

	return s, nil
}