func downloadFile(url string, filepath string) error { response, err := http.Get(url) if err != nil { return err } defer response.Body.Close() file, err := os.Create(filepath) if err != nil { return err } defer file.Close()

你可以使用Go语言编写一个对应该接口的服务，以下是示例代码：

package main

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

func downloadFileHandler(w http.ResponseWriter, r *http.Request) {
	url := "your_file_url" // 要下载的文件 URL
	filepath := "./your_file_name.ext" // 文件保存路径和名称，保存在当前目录下

	response, err := http.Get(url)
	if err != nil {
		log.Println(err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}
	defer response.Body.Close()

	file, err := os.Create(filepath)
	if err != nil {
		log.Println(err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}
	defer file.Close()

	_, err = io.Copy(file, response.Body)
	if err != nil {
		log.Println(err)
		w.WriteHeader(http.StatusInternalServerError)
		return
	}

	log.Printf("Download success: %s\n", filepath)

	w.WriteHeader(http.StatusOK)
	w.Write([]byte("Download completed"))
}

func main() {
	http.HandleFunc("/download", downloadFileHandler)

	log.Println("Server started on port 8080")
	err := http.ListenAndServe(":8080", nil)
	if err != nil {
	    log.Fatal(err)
    }
}

请将your_file_url替换为要下载的文件的URL，将your_file_name.ext替换为要保存的文件路径和名称。运行该程序后，访问http://localhost:8080/download即可触发文件下载，并保存在当前目录下。注意确保本地运行环境中已经安装了Go语言开发环境。

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