I tried looking it up, but couldn't find an already answered question.
How do I get the host part of the URL in Go?
For eg.
if the user enters http://localhost:8080 in the address bar, I wanted to extract "localhost" from the URL.
Go has built in library that can do it for you.
package main
import "fmt"
import "net"
import "net/url"
func main() {
s := "http://localhost:8080"
u, err := url.Parse(s)
if err != nil {
panic(err)
}
host, _, _ := net.SplitHostPort(u.Host)
fmt.Println(host)
}
If you are talking about extracting the host from a *http.Request you can do the following:
func ExampleHander(w http.ResponseWriter, r *http.Request) { host := r.Host // This is your host (and will include port if specified) }
If you just want to access the host part without the port part you can do the following:
func ExampleHandler(w http.ResponseWriter, r *http.Request) { host, port, _ := net.SplitHostPort(r.Host) }
For the last one to work you also have to import net
Go has wonderful documentation, I would also recommend taking a look at that: net/http