go-zero/tools/goctl/pkg/downloader/downloader.go

package downloader

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

func Download(url, filename string) error {
	resp, err := http.Get(url)
	if err != nil {
		return err
	}
	defer resp.Body.Close()

	f, err := os.Create(filename)
	if err != nil {
		return err
	}
	defer f.Close()
	_, err = io.Copy(f, resp.Body)
	return err
}