git-server/pkg/tool/path.go

// Copyright 2018 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package tool

import (
	"strings"
)

// IsSameSiteURLPath returns true if the URL path belongs to the same site, false otherwise.
// False: //url, http://url, /\url
// True: /url
func IsSameSiteURLPath(url string) bool {
	return len(url) >= 2 && url[0] == '/' && url[1] != '/' && url[1] != '\\'
}

// SanitizePath sanitizes user-defined file paths to prevent remote code execution.
func SanitizePath(path string) string {
	path = strings.TrimLeft(path, "/")
	path = strings.Replace(path, "../", "", -1)
	path = strings.Replace(path, "..\\", "", -1)
	return path
}