Golang : How to get URL port?

From the previous tutorial on how to break down a URL string, a reader emailed me wanting to know if there is a way to get the port number directly from the raw URL?

For example :

 rawURL := "http://username:password@searchengine.com:8080/testpath/?q=socketloop.com#TestFunc"

and get the port number 8080 with a function.

From my research, there is a function in the net package ... the net/SplitHostPort() function is able to do just that, but with the condition that the URL is in the form of "host:port", "[host]:port" or "[ipv6-host%zone]:port"

To use net/SplitHostPort() function on rawURL will produce this error message :

too many colons in address http://username:password@searchengine.com:8080/testpath/?q=socketloop.com#TestFunc

and therefore it is recommended to parse the rawURL first

 // Parse the URL and ensure there are no errors.
 url, err := url.Parse(rawURL)
 if err != nil {
  panic(err)
 }

and apply the SplitHostPort() function on url.Host

 shost, sport, err := net.SplitHostPort(url.Host)
 fmt.Println("Split Host is : ", shost)
 fmt.Println("Split Port is : ", sport)

Here's complete code :

 package main

 import (
 "fmt"
 "net"
 "net/url"
 "strings"
 )

 func main() {

 rawURL := "http://username:password@searchengine.com:8080/testpath/?q=socketloop.com#TestFunc"

 fmt.Println("URL : ", rawURL)

 // Parse the URL and ensure there are no errors.
 url, err := url.Parse(rawURL)
 if err != nil {
 panic(err)
 }

 // see http://golang.org/pkg/net/url/#URL
 // scheme://[userinfo@]host/path[?query][#fragment]

 // get the Scheme
 fmt.Println("Scheme : ", url.Scheme)

 // get the User information
 fmt.Println("Username : ", url.User.Username())

 password, set := url.User.Password()
 fmt.Println("Password : ", password)
 fmt.Println("Password set : ", set)

 // get the Host
 fmt.Println("Raw host : ", url.Host)

 // to get the Port number, split the Host
 hostport := strings.Split(url.Host, ":")
 host := hostport[0]
 port := hostport[1]

 fmt.Println("Host : ", host)
 fmt.Println("Port : ", port)

 // or use net.SplitHostPort
 // won't work with rawURL string
 shost, sport, err := net.SplitHostPort(url.Host)

 fmt.Println("Split Host is : ", shost)
 fmt.Println("Split Port is : ", sport)

 if err != nil {
 fmt.Println(err)
 }

 // get the Path
 fmt.Println("Path : ", url.Path)

 // get the RawQuery
 fmt.Println("Raw Query ", url.RawQuery)

 // get the fragment
 fmt.Println("Fragment : ", url.Fragment)

 }

Output :

URL : http://username:password@searchengine.com:8080/testpath/?q=socketloop.com#TestFunc

Scheme : http

Username : username

Password : password

Password set : true

Raw host : searchengine.com:8080

Host : searchengine.com

Port : 8080

Split Host is : searchengine.com

Split Port is : 8080

Path : /testpath/

Raw Query q=socketloop.com

Fragment : TestFunc

Reference :

http://golang.org/pkg/net/#SplitHostPort