[Answered ]-Match file path in url regex

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You can use

^images/(?:(?P<prefix>\w+)/)?(?P<uuid4>[0-9a-f]{8}(?:-[0-9a-f]{4}){3}-[0-9a-f]{12})\.(?P<ext>\w+)

See the regex demo

The optional dir after images/ is matched with an optional group (?:(?P<prefix>\w+)/)?. The ? quantifier matches 1 or 0 occurrences. If there can be more than 1, use * instead of ? (but I guess you’d have to think of correct “prefix” group boundaries).

Also, [0-9a-f][0-9a-f]{8} in your regex requies 9 chars, but there are 8 in fact.

3 consecutive -[0-9a-f]{4} can be just shrunk into another non-capturing group (?:-[0-9a-f]{4}){3}.

NOTE: It might be a good idea to prepend the pattern with (?i) (case insensitive modifier): (?i)^images/(?:(?P<prefix>\w+)/)?(?P<uuid4>[0-9a-f]{8}(?:-[0-9a-f]{4}){3}-[0-9a-f]{12})\.(?P<ext>\w+)

👤Wiktor Stribiżew

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