我在Google云端硬盘上存储了一个zip文件（已公开共享）。我想知道如何在Golang中下载它。当前代码仅创建一个名为“ file.zip”的空白文件：

package main

import (
    "fmt"
    "io"
    "net/http"
    "os"
)

func main() {
    url := "https://docs.google.com/uc?export=download&id=0B2Q7X-dUtUBebElySVh1ZS1iaTQ"
    fileName := "file.zip"
    fmt.Println("Downloading file...")

    output, err := os.Create(fileName)
    defer output.Close()

    response, err := http.Get(url)
    if err != nil {
        fmt.Println("Error while downloading", url, "-", eerrror)
        return
    }
    defer response.Body.Close()

    n, err := io.Copy(output, response.Body)

    fmt.Println(n, "bytes downloaded")
}