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