import requests


def download_image(url, path=None):

    request = requests.get(url)
    suffix_list = [
        "jpeg",
        "jpg",
        "png",
        "tif",
        "svg",
    ]
    extension = request.headers["content-type"].split("/")[1]

    if not path:
        path = "/tmp/image.{}".format(extension)

    if extension in suffix_list:
        open(path, "wb").write(requests.get(url).content)
        return path
    return "Invalid image format"