// getLayerData downloads/opens a layer archive and extracts it into memory.
func getLayerData(path string) (data map[string][]byte, err error) {
var layerReader io.ReadCloser
if strings.HasPrefix(path, "http://") || strings.HasPrefix(path, "https://") {
r, err := http.Get(path)
if err != nil {
return nil, cerrors.ErrCouldNotDownload
}
layerReader = r.Body
} else {
layerReader, err = os.Open(path)
if err != nil {
return nil, cerrors.ErrNotFound
}
}
defer layerReader.Close()
data, err = utils.SelectivelyExtractArchive(layerReader, append(detectors.GetRequiredFilesPackages(), detectors.GetRequiredFilesOS()...), maxFileSize)
if err != nil {
return nil, err
}
return
}
func (detector *ACIDataDetector) Detect(layerReader io.ReadCloser, toExtract []string, maxFileSize int64) (map[string][]byte, error) {
return utils.SelectivelyExtractArchive(layerReader, "rootfs/", toExtract, maxFileSize)
}