The goada library provides support for the WHATWG URL standard in Go.

• Go 1.20 or better.

url, nil := New("https://	www.GOoglé.com/./path/../path2/")
fmt.Println(url.Href()) // "https://www.xn--googl-fsa.com/path2/"

The standard net/url Parse function from the Go runtime refuses to parse the URL "https:// www.GOoglé.com/./path/../path2/" because it contains a tabulation character. Even if we remove the tabulation character, it still parses it to an incorrect string as per the WHATGW URL standard (https://www.GOogl%C3%A9.com/./path/../path2/). That is, if fails to normalize the domain name, and it does not process the path string.

import (
   "github.com/ada-url/goada"
   "fmt"
)

url, err := goada.New("https://www.GOogle.com")
if err != nil {
    t.Error("Expected no error")
}
fmt.Println(url.Href()) // prints https://www.google.com/
url.SetProtocol("http:")
url.SetHash("goada")
fmt.Println(url.Hash()) // prints #goada
fmt.Println(url.Href()) // prints http://www.google.com/#goada