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converters.py 1.2KB

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  1. import uuid
  2. from functools import lru_cache
  3. class IntConverter:
  4. regex = "[0-9]+"
  5. def to_python(self, value):
  6. return int(value)
  7. def to_url(self, value):
  8. return str(value)
  9. class StringConverter:
  10. regex = "[^/]+"
  11. def to_python(self, value):
  12. return value
  13. def to_url(self, value):
  14. return value
  15. class UUIDConverter:
  16. regex = "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}"
  17. def to_python(self, value):
  18. return uuid.UUID(value)
  19. def to_url(self, value):
  20. return str(value)
  21. class SlugConverter(StringConverter):
  22. regex = "[-a-zA-Z0-9_]+"
  23. class PathConverter(StringConverter):
  24. regex = ".+"
  25. DEFAULT_CONVERTERS = {
  26. "int": IntConverter(),
  27. "path": PathConverter(),
  28. "slug": SlugConverter(),
  29. "str": StringConverter(),
  30. "uuid": UUIDConverter(),
  31. }
  32. REGISTERED_CONVERTERS = {}
  33. def register_converter(converter, type_name):
  34. REGISTERED_CONVERTERS[type_name] = converter()
  35. get_converters.cache_clear()
  36. @lru_cache(maxsize=None)
  37. def get_converters():
  38. return {**DEFAULT_CONVERTERS, **REGISTERED_CONVERTERS}
  39. def get_converter(raw_converter):
  40. return get_converters()[raw_converter]