Script filename from SasUri cannot contain /

[ArchangelSDY]

I have a script source SasUri like:

https://xxx.blob.windows.net/container/foo/bar.sh

According to:

run-command-handler-linux/pkg/download/blob.go

Lines 82 to 99 in 6efb77e

	fileName, blobPathError := getBlobPathAfterContainerName(blobURI, containerRef.Name)
	if fileName == "" {
	return "", errors.Wrapf(blobPathError, "cannot extract blob path name from URL: %q", blobURI)
	}
	blobref := containerRef.GetBlobReference(fileName)
	reader, err := blobref.Get(nil)
	if err != nil {
	return "", errors.Wrapf(err, "unable to open storage blob: %q", blobURI)
	}
	scriptFilePath := filepath.Join(targetDir, fileName)
	const mode = 0500 // scripts should have execute permissions
	file, err := os.OpenFile(scriptFilePath, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, mode)
	if err != nil {
	return "", errors.Wrap(err, "failed to open file for writing: "+scriptFilePath)
	}
	defer file.Close()

fileName becomes foo/bar.sh. However, directory foo doesn't exist so the open below always fails.

Suggest using fixed file name like a GUID. Otherwise you have to deal with .. and / in paths which could cause a lot of security troubles.