func (d *diffDownload) downloadState(sequence int32) (*state.DiffState, error) {
dest := path.Join(d.dest, diffPath(sequence))
err := os.MkdirAll(path.Dir(dest), 0755)
if err != nil {
return nil, err
}
resp, err := http.Get(d.url + diffPath(sequence) + ".state.txt")
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return nil, errors.New(fmt.Sprintf("invalid repsonse: %v", resp))
}
buf := &bytes.Buffer{}
_, err = io.Copy(buf, resp.Body)
if err != nil {
return nil, err
}
err = ioutil.WriteFile(dest+".state.txt", buf.Bytes(), 0644)
if err != nil {
return nil, err
}
reader := bytes.NewReader(buf.Bytes())
return state.Parse(reader)
}
func (d *diffDownload) currentState() (*state.DiffState, error) {
resp, err := http.Get(d.url + "state.txt")
if err != nil {
return nil, err
}
if resp.StatusCode != 200 {
return nil, errors.New(fmt.Sprintf("invalid repsonse: %v", resp))
}
defer resp.Body.Close()
return state.Parse(resp.Body)
}