Validate URL with standard package in GO

Question

Is there any function in a standard package in GO that allows to validate a URL?

I have not found anything on my initial search, and I would prefer not to resort to regex checking.

Answer 1

Yep, url.ParseRequestURI returns an error if the URL is not valid, not an absolute url, etc etc. url.Parse returns valid on almost anything...

import "net/url"  ...   u, err := url.ParseRequestURI("http://google.com/") if err != nil {    panic(err) } 

The above example will not fail, but these will:

u, err := url.ParseRequestURI("http//google.com")  u, err := url.ParseRequestURI("google.com")  u, err := url.ParseRequestURI("/foo/bar") 

Answer 2

The accepted answer allows empty http:// and relative urls like /foo/bar. If you want a stricter check, this will reject those:

import "net/url"

func IsUrl(str string) bool {
    u, err := url.Parse(str)
    return err == nil && u.Scheme != "" && u.Host != ""
}

Example: https://play.golang.org/p/JngFarWPF2-

Which came from this answer: https://stackoverflow.com/a/25747925/744298