例如，

package main

import (
    "fmt"
    "net/http"
)

func main() {
    getURL := "http://pkgdoc.org/"
    fmt.Println("getURL:", getURL)
    resp, err := http.Get(getURL)
    if err != nil {
        fmt.Println(err)
        return
    }
    finalURL := resp.Request.URL.String()
    fmt.Println("finalURL:", finalURL)
}

输出：

getURL: http://pkgdoc.org/
finalURL: http://godoc.org/