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// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package url
import "net/url"
import "fmt"
import "strings"
// AbsoluteURL converts the input URL as absolute URL if necessary.
func AbsoluteURL(baseURL, input string) (string, error) {
if strings.HasPrefix(input, "//") {
input = "https://" + input[2:]
}
u, err := url.Parse(input)
if err != nil {
return "", fmt.Errorf("unable to parse input URL: %v", err)
}
if u.IsAbs() {
return u.String(), nil
}
base, err := url.Parse(baseURL)
if err != nil {
return "", fmt.Errorf("unable to parse base URL: %v", err)
}
return base.ResolveReference(u).String(), nil
}
// RootURL returns absolute URL without the path.
func RootURL(websiteURL string) string {
if strings.HasPrefix(websiteURL, "//") {
websiteURL = "https://" + websiteURL[2:]
}
absoluteURL, err := AbsoluteURL(websiteURL, "")
if err != nil {
return websiteURL
}
u, err := url.Parse(absoluteURL)
if err != nil {
return absoluteURL
}
return u.Scheme + "://" + u.Host + "/"
}
// IsHTTPS returns true if the URL is using HTTPS.
func IsHTTPS(websiteURL string) bool {
parsedURL, err := url.Parse(websiteURL)
if err != nil {
return false
}
return strings.ToLower(parsedURL.Scheme) == "https"
}
// Domain returns only the domain part of the given URL.
func Domain(websiteURL string) string {
parsedURL, err := url.Parse(websiteURL)
if err != nil {
return websiteURL
}
return parsedURL.Host
}
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