271 lines
7.4 KiB
Python
271 lines
7.4 KiB
Python
from __future__ import annotations
|
|
|
|
import re
|
|
import typing as t
|
|
import uuid
|
|
import warnings
|
|
from urllib.parse import quote
|
|
|
|
if t.TYPE_CHECKING:
|
|
from .map import Map
|
|
|
|
|
|
class ValidationError(ValueError):
|
|
"""Validation error. If a rule converter raises this exception the rule
|
|
does not match the current URL and the next URL is tried.
|
|
"""
|
|
|
|
|
|
class BaseConverter:
|
|
"""Base class for all converters.
|
|
|
|
.. versionchanged:: 2.3
|
|
``part_isolating`` defaults to ``False`` if ``regex`` contains a ``/``.
|
|
"""
|
|
|
|
regex = "[^/]+"
|
|
weight = 100
|
|
part_isolating = True
|
|
|
|
def __init_subclass__(cls, **kwargs: t.Any) -> None:
|
|
super().__init_subclass__(**kwargs)
|
|
|
|
# If the converter isn't inheriting its regex, disable part_isolating by default
|
|
# if the regex contains a / character.
|
|
if "regex" in cls.__dict__ and "part_isolating" not in cls.__dict__:
|
|
cls.part_isolating = "/" not in cls.regex
|
|
|
|
def __init__(self, map: Map, *args: t.Any, **kwargs: t.Any) -> None:
|
|
self.map = map
|
|
|
|
def to_python(self, value: str) -> t.Any:
|
|
return value
|
|
|
|
def to_url(self, value: t.Any) -> str:
|
|
if isinstance(value, (bytes, bytearray)):
|
|
warnings.warn(
|
|
"Passing bytes as a URL value is deprecated and will not be supported"
|
|
" in Werkzeug 3.0.",
|
|
DeprecationWarning,
|
|
stacklevel=7,
|
|
)
|
|
return quote(value, safe="!$&'()*+,/:;=@")
|
|
|
|
# safe = https://url.spec.whatwg.org/#url-path-segment-string
|
|
return quote(str(value), encoding=self.map.charset, safe="!$&'()*+,/:;=@")
|
|
|
|
|
|
class UnicodeConverter(BaseConverter):
|
|
"""This converter is the default converter and accepts any string but
|
|
only one path segment. Thus the string can not include a slash.
|
|
|
|
This is the default validator.
|
|
|
|
Example::
|
|
|
|
Rule('/pages/<page>'),
|
|
Rule('/<string(length=2):lang_code>')
|
|
|
|
:param map: the :class:`Map`.
|
|
:param minlength: the minimum length of the string. Must be greater
|
|
or equal 1.
|
|
:param maxlength: the maximum length of the string.
|
|
:param length: the exact length of the string.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
map: Map,
|
|
minlength: int = 1,
|
|
maxlength: int | None = None,
|
|
length: int | None = None,
|
|
) -> None:
|
|
super().__init__(map)
|
|
if length is not None:
|
|
length_regex = f"{{{int(length)}}}"
|
|
else:
|
|
if maxlength is None:
|
|
maxlength_value = ""
|
|
else:
|
|
maxlength_value = str(int(maxlength))
|
|
length_regex = f"{{{int(minlength)},{maxlength_value}}}"
|
|
self.regex = f"[^/]{length_regex}"
|
|
|
|
|
|
class AnyConverter(BaseConverter):
|
|
"""Matches one of the items provided. Items can either be Python
|
|
identifiers or strings::
|
|
|
|
Rule('/<any(about, help, imprint, class, "foo,bar"):page_name>')
|
|
|
|
:param map: the :class:`Map`.
|
|
:param items: this function accepts the possible items as positional
|
|
arguments.
|
|
|
|
.. versionchanged:: 2.2
|
|
Value is validated when building a URL.
|
|
"""
|
|
|
|
def __init__(self, map: Map, *items: str) -> None:
|
|
super().__init__(map)
|
|
self.items = set(items)
|
|
self.regex = f"(?:{'|'.join([re.escape(x) for x in items])})"
|
|
|
|
def to_url(self, value: t.Any) -> str:
|
|
if value in self.items:
|
|
return str(value)
|
|
|
|
valid_values = ", ".join(f"'{item}'" for item in sorted(self.items))
|
|
raise ValueError(f"'{value}' is not one of {valid_values}")
|
|
|
|
|
|
class PathConverter(BaseConverter):
|
|
"""Like the default :class:`UnicodeConverter`, but it also matches
|
|
slashes. This is useful for wikis and similar applications::
|
|
|
|
Rule('/<path:wikipage>')
|
|
Rule('/<path:wikipage>/edit')
|
|
|
|
:param map: the :class:`Map`.
|
|
"""
|
|
|
|
regex = "[^/].*?"
|
|
weight = 200
|
|
|
|
|
|
class NumberConverter(BaseConverter):
|
|
"""Baseclass for `IntegerConverter` and `FloatConverter`.
|
|
|
|
:internal:
|
|
"""
|
|
|
|
weight = 50
|
|
num_convert: t.Callable = int
|
|
|
|
def __init__(
|
|
self,
|
|
map: Map,
|
|
fixed_digits: int = 0,
|
|
min: int | None = None,
|
|
max: int | None = None,
|
|
signed: bool = False,
|
|
) -> None:
|
|
if signed:
|
|
self.regex = self.signed_regex
|
|
super().__init__(map)
|
|
self.fixed_digits = fixed_digits
|
|
self.min = min
|
|
self.max = max
|
|
self.signed = signed
|
|
|
|
def to_python(self, value: str) -> t.Any:
|
|
if self.fixed_digits and len(value) != self.fixed_digits:
|
|
raise ValidationError()
|
|
value = self.num_convert(value)
|
|
if (self.min is not None and value < self.min) or (
|
|
self.max is not None and value > self.max
|
|
):
|
|
raise ValidationError()
|
|
return value
|
|
|
|
def to_url(self, value: t.Any) -> str:
|
|
value = str(self.num_convert(value))
|
|
if self.fixed_digits:
|
|
value = value.zfill(self.fixed_digits)
|
|
return value
|
|
|
|
@property
|
|
def signed_regex(self) -> str:
|
|
return f"-?{self.regex}"
|
|
|
|
|
|
class IntegerConverter(NumberConverter):
|
|
"""This converter only accepts integer values::
|
|
|
|
Rule("/page/<int:page>")
|
|
|
|
By default it only accepts unsigned, positive values. The ``signed``
|
|
parameter will enable signed, negative values. ::
|
|
|
|
Rule("/page/<int(signed=True):page>")
|
|
|
|
:param map: The :class:`Map`.
|
|
:param fixed_digits: The number of fixed digits in the URL. If you
|
|
set this to ``4`` for example, the rule will only match if the
|
|
URL looks like ``/0001/``. The default is variable length.
|
|
:param min: The minimal value.
|
|
:param max: The maximal value.
|
|
:param signed: Allow signed (negative) values.
|
|
|
|
.. versionadded:: 0.15
|
|
The ``signed`` parameter.
|
|
"""
|
|
|
|
regex = r"\d+"
|
|
|
|
|
|
class FloatConverter(NumberConverter):
|
|
"""This converter only accepts floating point values::
|
|
|
|
Rule("/probability/<float:probability>")
|
|
|
|
By default it only accepts unsigned, positive values. The ``signed``
|
|
parameter will enable signed, negative values. ::
|
|
|
|
Rule("/offset/<float(signed=True):offset>")
|
|
|
|
:param map: The :class:`Map`.
|
|
:param min: The minimal value.
|
|
:param max: The maximal value.
|
|
:param signed: Allow signed (negative) values.
|
|
|
|
.. versionadded:: 0.15
|
|
The ``signed`` parameter.
|
|
"""
|
|
|
|
regex = r"\d+\.\d+"
|
|
num_convert = float
|
|
|
|
def __init__(
|
|
self,
|
|
map: Map,
|
|
min: float | None = None,
|
|
max: float | None = None,
|
|
signed: bool = False,
|
|
) -> None:
|
|
super().__init__(map, min=min, max=max, signed=signed) # type: ignore
|
|
|
|
|
|
class UUIDConverter(BaseConverter):
|
|
"""This converter only accepts UUID strings::
|
|
|
|
Rule('/object/<uuid:identifier>')
|
|
|
|
.. versionadded:: 0.10
|
|
|
|
:param map: the :class:`Map`.
|
|
"""
|
|
|
|
regex = (
|
|
r"[A-Fa-f0-9]{8}-[A-Fa-f0-9]{4}-"
|
|
r"[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{12}"
|
|
)
|
|
|
|
def to_python(self, value: str) -> uuid.UUID:
|
|
return uuid.UUID(value)
|
|
|
|
def to_url(self, value: uuid.UUID) -> str:
|
|
return str(value)
|
|
|
|
|
|
#: the default converter mapping for the map.
|
|
DEFAULT_CONVERTERS: t.Mapping[str, type[BaseConverter]] = {
|
|
"default": UnicodeConverter,
|
|
"string": UnicodeConverter,
|
|
"any": AnyConverter,
|
|
"path": PathConverter,
|
|
"int": IntegerConverter,
|
|
"float": FloatConverter,
|
|
"uuid": UUIDConverter,
|
|
}
|