| # -*- coding: utf-8 -*- | |
| import re | |
| from petrel_client.common.exception import InvalidS3UriError | |
| # (?:...) | |
| # A non-capturing version of regular parentheses. Matches whatever regular expression is inside the parentheses, but the substring matched by the group cannot be retrieved after performing a match or referenced later in the pattern. | |
| # *?, +?, ?? | |
| # The '*', '+', and '?' qualifiers are all greedy; they match as much text as possible. Sometimes this behaviour isn’t desired; if the RE <.*> is matched against <a> b <c>, it will match the entire string, and not just <a>. Adding ? after the qualifier makes it perform the match in non-greedy or minimal fashion; as few characters as possible will be matched. Using the RE <.*?> will match only <a>. | |
| # re.I | |
| # re.IGNORECASE | |
| # Perform case-insensitive matching; expressions like [A-Z] will match lowercase letters, too. This is not affected by the current locale. To get this effect on non-ASCII Unicode characters such as ü and Ü, add the UNICODE flag. | |
| PATTERN = re.compile(r'^(?:([^:]+):)?s3://([^/]+)/(.+?)/?$', re.I) | |
| def parse_s3_uri(uri): | |
| m = PATTERN.match(uri) | |
| if m: | |
| return (m.group(1), m.group(2), m.group(3)) | |
| else: | |
| raise InvalidS3UriError(uri) | |