func fetchFileId(server string, fileId string) (filename string, content []byte, e error) {
fileUrl, lookupError := operation.LookupFileId(server, fileId)
if lookupError != nil {
return "", nil, lookupError
}
filename, content, e = util.DownloadUrl(fileUrl)
return
}
func fetchContent(server string, fileId string) (filename string, content []byte, e error) {
fileUrl, lookupError := operation.LookupFileId(server, fileId)
if lookupError != nil {
return "", nil, lookupError
}
var rc io.ReadCloser
if filename, rc, e = util.DownloadUrl(fileUrl); e != nil {
return "", nil, e
}
content, e = ioutil.ReadAll(rc)
rc.Close()
return
}
func downloadToFile(server, fileId, saveDir string) error {
fileUrl, lookupError := operation.LookupFileId(server, fileId)
if lookupError != nil {
return lookupError
}
filename, rc, err := util.DownloadUrl(fileUrl)
if err != nil {
return err
}
defer rc.Close()
if filename == "" {
filename = fileId
}
isFileList := false
if strings.HasSuffix(filename, "-list") {
// old command compatible
isFileList = true
filename = filename[0 : len(filename)-len("-list")]
}
f, err := os.OpenFile(path.Join(saveDir, filename), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, os.ModePerm)
if err != nil {
return err
}
defer f.Close()
if isFileList {
content, err := ioutil.ReadAll(rc)
if err != nil {
return err
}
fids := strings.Split(string(content), "\n")
for _, partId := range fids {
var n int
_, part, err := fetchContent(*d.server, partId)
if err == nil {
n, err = f.Write(part)
}
if err == nil && n < len(part) {
err = io.ErrShortWrite
}
if err != nil {
return err
}
}
} else {
if _, err = io.Copy(f, rc); err != nil {
return err
}
}
return nil
}