filelister.py 文件源码

def download_file(url, download_directory):
        """Download a remote file

        Args:
            download_directory: (string)

        Returns:
            (string) that path of the file that was just downloaded. If something failed during
                download, return None

        Raises:
            DownloadError
        """
        Output.print_information("Downloading " + url + " ...")

        parsed_url = urlparse(url)
        if parsed_url.path in ["/", ""]:
            file_name = parsed_url.netloc
        else:
            file_name = parsed_url.path.split("/")[-1]
        download_path = abspath(join(download_directory, file_name))

        try:
            with open(download_path, 'wb') as file_object:
                file_object.write(urlopen(url).read())
                return download_path

        except HTTPError as expn:
            raise DownloadError("HTTP error code " + str(expn.code) + " while retrieving " \
             + url + "\n" + str(expn.reason))
        except URLError as expn:
            raise DownloadError("HTTP URL error while retrieving " + url + "\n" + str(expn.reason))
        except Exception as expn:
            raise DownloadError("Unable to retrieve " + url + "\n" + str(expn))