How Do I Extract the Final URL After Redirects in Go?

Extracting the Final URL in Go after Redirects

In Go's "net/http" package, retrieving a URL that undergoes multiple redirects can invoke automatic redirection handling. However, determining the final destination URL can prove challenging without implementing a hackish workaround.

Solution: Leveraging Response Object

Fortunately, a more elegant solution exists. The "Response" object returned by "http.Get" (or other HTTP method functions) contains an "Request" field that represents the last attempted access. This can be utilized to extract the final URL.

package main

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

func main() {
    // Initiate a GET request for a URL subject to redirects
    resp, err := http.Get("https://google.com") // Replace with the target URL
    if err != nil {
        log.Fatalf("http.Get -> %v", err)
    }

    // Retrieve the final URL using the last attempted Request in the Response
    finalURL := resp.Request.URL.String()

    // Output the resolved final URL
    fmt.Printf("The URL you ended up at is: %s", finalURL)
}

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