57 lines
1.4 KiB
Go
57 lines
1.4 KiB
Go
package utils
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import (
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"errors"
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"io"
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"net/http"
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"os"
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"path/filepath"
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log "github.com/sirupsen/logrus"
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)
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func Download(req *http.Request, target string) error {
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log.Debugf("downloading %s to %s", req.URL.String(), target)
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err := os.MkdirAll(filepath.Dir(target), 0o755)
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if err != nil {
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log.Errorf("create dir %s err: %s", filepath.Dir(target), err)
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return err
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}
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out, err := os.OpenFile(target, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0o755)
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if err != nil {
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log.Errorf("cannot create file '%s', error: %s", target, err)
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return err
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}
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defer func() {
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_ = out.Close()
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}()
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resp, err := (&http.Client{}).Do(req)
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if err != nil {
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log.Errorf("request error: %s", err)
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return err
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}
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defer func() {
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_ = resp.Body.Close()
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}()
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if resp.StatusCode != http.StatusOK {
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log.Errorf("request failed, status code: %d", resp.StatusCode)
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return errors.New("update website is inaccessible right now")
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}
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contentType := resp.Header.Get("Content-Type")
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if contentType != "application/octet-stream" && contentType != "application/zip" && contentType != "application/gzip" {
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log.Debugf("unexpected content-type, it should be either octet-stream or (g)zip, but got: %s", contentType)
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return errors.New("unsupported content type")
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}
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_, err = io.Copy(out, resp.Body)
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if err != nil {
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log.Errorf("download file to %s err: %s", target, err)
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return err
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}
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return nil
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}
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