Python URL Pattern Matcher

A simple, zero-dependency class to match URLs against patterns with named parameters. It converts patterns like /api/resource/<id> into regular expressions and extracts the parameters.

Usage

matcher = URLPatternMatcher('/api/users/<user_id>/posts/<post_id>')
result = matcher.match('/api/users/123/posts/456')
# Result: {'user_id': '123', 'post_id': '456'}

Source Code

import json
import re


class URLPatternMatcher:
    def __init__(self, pattern: str):
        self.pattern = pattern.rstrip('/')

    def match(self, path: str) -> dict | bool:
        """Match URL pattern
        Path format example: /api/automation/<service>/<entity>/<id>/<action>
        """
        pattern_re = re.compile(r'(<([^>]+)>)')
        matches = pattern_re.findall(self.pattern)

        for match in matches:
            self.pattern = self.pattern.replace(
                match[0], fr'(?P<{match[1]}>[^/]+)')

        print(self.pattern)
        res = re.match(self.pattern, path)

        if res:
            return res.groupdict()
        else:
            return False