在golang中,如何在一系列重定向后确定最终的URL？

Question

所以,我正在使用net/http包.我正在获取一个我确定知道重定向的URL.在登陆最终URL之前,它甚至可能会重定向几次.重定向在后台自动处理.

有没有简单的方法来确定最终的URL是什么,没有涉及在http.Client对象上设置CheckRedirect字段的hackish变通方法？

我想我应该提一下,我认为我想出了一个解决方法,但它有点像hackish,因为它涉及使用全局变量并在自定义http.Client上设置CheckRedirect字段.

必须有一个更清洁的方法来做到这一点.我希望这样的事情:

package main

import (
  "fmt"
  "log"
  "net/http"
)

func main() {
  // Try to GET some URL that redirects.  Could be 5 or 6 unseen redirections here.
  resp, err := http.Get("http://some-server.com/a/url/that/redirects.html")
  if err != nil {
    log.Fatalf("http.Get => %v", err.Error())
  }

  // Find out what URL we ended up at
  finalURL := magicFunctionThatTellsMeTheFinalURL(resp)

  fmt.Printf("The URL you ended up at is: %v", finalURL)
}

Answer 1

package main

import (
    "fmt"
    "log"
    "net/http"
)

func main() {
    resp, err := http.Get("http://stackoverflow.com/q/16784419/727643")
    if err != nil {
        log.Fatalf("http.Get => %v", err.Error())
    }

    // Your magic function. The Request in the Response is the last URL the
    // client tried to access.
    finalURL := resp.Request.URL.String()

    fmt.Printf("The URL you ended up at is: %v\n", finalURL)
}

输出:

The URL you ended up at is: http://stackoverflow.com/questions/16784419/in-golang-how-to-determine-the-final-url-after-a-series-of-redirects