131 lines
2.8 KiB
Go
131 lines
2.8 KiB
Go
// 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 "miniflux.app/url"
|
|
|
|
import (
|
|
"fmt"
|
|
"net/url"
|
|
"sort"
|
|
"strings"
|
|
)
|
|
|
|
// IsAbsoluteURL returns true if the link is absolute.
|
|
func IsAbsoluteURL(link string) bool {
|
|
u, err := url.Parse(link)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
return u.IsAbs()
|
|
}
|
|
|
|
// 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
|
|
}
|
|
|
|
// RequestURI returns the encoded URI to be used in HTTP requests.
|
|
func RequestURI(websiteURL string) string {
|
|
u, err := url.Parse(websiteURL)
|
|
if err != nil {
|
|
return websiteURL
|
|
}
|
|
|
|
queryValues := u.Query()
|
|
u.RawQuery = "" // Clear RawQuery to make sure it's encoded properly.
|
|
u.Fragment = "" // Clear fragment because Web browsers strip #fragment before sending the URL to a web server.
|
|
|
|
var buf strings.Builder
|
|
buf.WriteString(u.String())
|
|
|
|
if len(queryValues) > 0 {
|
|
buf.WriteByte('?')
|
|
|
|
// Sort keys.
|
|
keys := make([]string, 0, len(queryValues))
|
|
for k := range queryValues {
|
|
keys = append(keys, k)
|
|
}
|
|
sort.Strings(keys)
|
|
|
|
i := 0
|
|
for _, key := range keys {
|
|
keyEscaped := url.QueryEscape(key)
|
|
values := queryValues[key]
|
|
for _, value := range values {
|
|
if i > 0 {
|
|
buf.WriteByte('&')
|
|
}
|
|
buf.WriteString(keyEscaped)
|
|
|
|
// As opposed to the standard library, we append the = only if the value is not empty.
|
|
if value != "" {
|
|
buf.WriteByte('=')
|
|
buf.WriteString(url.QueryEscape(value))
|
|
}
|
|
|
|
i++
|
|
}
|
|
}
|
|
}
|
|
|
|
return buf.String()
|
|
}
|