// Construct a FileClient given a file identifier and APIClient
func NewFileClient(c *api.Client, fileId string, fields []string) (*FileClient, error) {
body, header, err := c.GetFileMetadata(fileId, fields)
if err != nil {
return nil, err
}
f := FileClient{APIClient: c, OnDemand: fields}
err = json.Unmarshal(body, &f.Desc)
if err != nil {
return nil, errors.New("Unable to unmarshal existing File")
}
f.Desc.Etag = header.Get("ETag")
return &f, nil
}
