diff options
Diffstat (limited to 'url/url.go')
-rw-r--r-- | url/url.go | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/url/url.go b/url/url.go new file mode 100644 index 0000000..e5a7c62 --- /dev/null +++ b/url/url.go @@ -0,0 +1,71 @@ +// 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 +} |