Golang : Get final or effective URL with Request.URL example
There are times when we query a web server, it will re-direct internally and returns back with a slightly different URL structure. The returned URL is known as final URL or "effective url". In this following example, we will learn how to use https://golang.org/pkg/net/http/#Request.URL to retrieve the final URL.
package main
import (
"fmt"
"net/http"
)
func main() {
// without https (SSL)
originalURL := "//socketloop.com"
resp, err := http.Get(originalURL)
if err != nil {
fmt.Println(err)
}
// if there is any re-direction happening behind the scene
// the finalURL will be different
// in this case, there will be a re-direction to https (SSL) version
finalURL := resp.Request.URL.String()
fmt.Println("Original URL is : ", originalURL)
fmt.Println("Final URL is : ", finalURL)
}
Socketloop.com's NGINX web server will automatically redirect all non-https
request to https(SSL)
. Therefore, the final URL will be SSL-ed connection.
Original URL is : //socketloop.com
Final URL is : https://socketloop.com/
References :
https://www.socketloop.com/tutorials/golang-http-get-example
See also : Golang : Intercept and compare HTTP response code example
By Adam Ng
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