You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
880 lines
30 KiB
Python
880 lines
30 KiB
Python
import ast
|
|
import re
|
|
import typing as t
|
|
from dataclasses import dataclass
|
|
from string import Template
|
|
from types import CodeType
|
|
|
|
from .._internal import _to_bytes
|
|
from ..urls import url_encode
|
|
from ..urls import url_quote
|
|
from .converters import ValidationError
|
|
|
|
if t.TYPE_CHECKING:
|
|
from .converters import BaseConverter
|
|
from .map import Map
|
|
|
|
|
|
class Weighting(t.NamedTuple):
|
|
number_static_weights: int
|
|
static_weights: t.List[t.Tuple[int, int]]
|
|
number_argument_weights: int
|
|
argument_weights: t.List[int]
|
|
|
|
|
|
@dataclass
|
|
class RulePart:
|
|
"""A part of a rule.
|
|
|
|
Rules can be represented by parts as delimited by `/` with
|
|
instances of this class representing those parts. The *content* is
|
|
either the raw content if *static* or a regex string to match
|
|
against. The *weight* can be used to order parts when matching.
|
|
|
|
"""
|
|
|
|
content: str
|
|
final: bool
|
|
static: bool
|
|
weight: Weighting
|
|
|
|
|
|
_part_re = re.compile(
|
|
r"""
|
|
(?:
|
|
(?P<slash>\/) # a slash
|
|
|
|
|
(?P<static>[^<\/]+) # static rule data
|
|
|
|
|
(?:
|
|
<
|
|
(?:
|
|
(?P<converter>[a-zA-Z_][a-zA-Z0-9_]*) # converter name
|
|
(?:\((?P<arguments>.*?)\))? # converter arguments
|
|
\: # variable delimiter
|
|
)?
|
|
(?P<variable>[a-zA-Z_][a-zA-Z0-9_]*) # variable name
|
|
>
|
|
)
|
|
)
|
|
""",
|
|
re.VERBOSE,
|
|
)
|
|
|
|
_simple_rule_re = re.compile(r"<([^>]+)>")
|
|
_converter_args_re = re.compile(
|
|
r"""
|
|
((?P<name>\w+)\s*=\s*)?
|
|
(?P<value>
|
|
True|False|
|
|
\d+.\d+|
|
|
\d+.|
|
|
\d+|
|
|
[\w\d_.]+|
|
|
[urUR]?(?P<stringval>"[^"]*?"|'[^']*')
|
|
)\s*,
|
|
""",
|
|
re.VERBOSE,
|
|
)
|
|
|
|
|
|
_PYTHON_CONSTANTS = {"None": None, "True": True, "False": False}
|
|
|
|
|
|
def _find(value: str, target: str, pos: int) -> int:
|
|
"""Find the *target* in *value* after *pos*.
|
|
|
|
Returns the *value* length if *target* isn't found.
|
|
"""
|
|
try:
|
|
return value.index(target, pos)
|
|
except ValueError:
|
|
return len(value)
|
|
|
|
|
|
def _pythonize(value: str) -> t.Union[None, bool, int, float, str]:
|
|
if value in _PYTHON_CONSTANTS:
|
|
return _PYTHON_CONSTANTS[value]
|
|
for convert in int, float:
|
|
try:
|
|
return convert(value) # type: ignore
|
|
except ValueError:
|
|
pass
|
|
if value[:1] == value[-1:] and value[0] in "\"'":
|
|
value = value[1:-1]
|
|
return str(value)
|
|
|
|
|
|
def parse_converter_args(argstr: str) -> t.Tuple[t.Tuple, t.Dict[str, t.Any]]:
|
|
argstr += ","
|
|
args = []
|
|
kwargs = {}
|
|
|
|
for item in _converter_args_re.finditer(argstr):
|
|
value = item.group("stringval")
|
|
if value is None:
|
|
value = item.group("value")
|
|
value = _pythonize(value)
|
|
if not item.group("name"):
|
|
args.append(value)
|
|
else:
|
|
name = item.group("name")
|
|
kwargs[name] = value
|
|
|
|
return tuple(args), kwargs
|
|
|
|
|
|
class RuleFactory:
|
|
"""As soon as you have more complex URL setups it's a good idea to use rule
|
|
factories to avoid repetitive tasks. Some of them are builtin, others can
|
|
be added by subclassing `RuleFactory` and overriding `get_rules`.
|
|
"""
|
|
|
|
def get_rules(self, map: "Map") -> t.Iterable["Rule"]:
|
|
"""Subclasses of `RuleFactory` have to override this method and return
|
|
an iterable of rules."""
|
|
raise NotImplementedError()
|
|
|
|
|
|
class Subdomain(RuleFactory):
|
|
"""All URLs provided by this factory have the subdomain set to a
|
|
specific domain. For example if you want to use the subdomain for
|
|
the current language this can be a good setup::
|
|
|
|
url_map = Map([
|
|
Rule('/', endpoint='#select_language'),
|
|
Subdomain('<string(length=2):lang_code>', [
|
|
Rule('/', endpoint='index'),
|
|
Rule('/about', endpoint='about'),
|
|
Rule('/help', endpoint='help')
|
|
])
|
|
])
|
|
|
|
All the rules except for the ``'#select_language'`` endpoint will now
|
|
listen on a two letter long subdomain that holds the language code
|
|
for the current request.
|
|
"""
|
|
|
|
def __init__(self, subdomain: str, rules: t.Iterable[RuleFactory]) -> None:
|
|
self.subdomain = subdomain
|
|
self.rules = rules
|
|
|
|
def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
|
|
for rulefactory in self.rules:
|
|
for rule in rulefactory.get_rules(map):
|
|
rule = rule.empty()
|
|
rule.subdomain = self.subdomain
|
|
yield rule
|
|
|
|
|
|
class Submount(RuleFactory):
|
|
"""Like `Subdomain` but prefixes the URL rule with a given string::
|
|
|
|
url_map = Map([
|
|
Rule('/', endpoint='index'),
|
|
Submount('/blog', [
|
|
Rule('/', endpoint='blog/index'),
|
|
Rule('/entry/<entry_slug>', endpoint='blog/show')
|
|
])
|
|
])
|
|
|
|
Now the rule ``'blog/show'`` matches ``/blog/entry/<entry_slug>``.
|
|
"""
|
|
|
|
def __init__(self, path: str, rules: t.Iterable[RuleFactory]) -> None:
|
|
self.path = path.rstrip("/")
|
|
self.rules = rules
|
|
|
|
def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
|
|
for rulefactory in self.rules:
|
|
for rule in rulefactory.get_rules(map):
|
|
rule = rule.empty()
|
|
rule.rule = self.path + rule.rule
|
|
yield rule
|
|
|
|
|
|
class EndpointPrefix(RuleFactory):
|
|
"""Prefixes all endpoints (which must be strings for this factory) with
|
|
another string. This can be useful for sub applications::
|
|
|
|
url_map = Map([
|
|
Rule('/', endpoint='index'),
|
|
EndpointPrefix('blog/', [Submount('/blog', [
|
|
Rule('/', endpoint='index'),
|
|
Rule('/entry/<entry_slug>', endpoint='show')
|
|
])])
|
|
])
|
|
"""
|
|
|
|
def __init__(self, prefix: str, rules: t.Iterable[RuleFactory]) -> None:
|
|
self.prefix = prefix
|
|
self.rules = rules
|
|
|
|
def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
|
|
for rulefactory in self.rules:
|
|
for rule in rulefactory.get_rules(map):
|
|
rule = rule.empty()
|
|
rule.endpoint = self.prefix + rule.endpoint
|
|
yield rule
|
|
|
|
|
|
class RuleTemplate:
|
|
"""Returns copies of the rules wrapped and expands string templates in
|
|
the endpoint, rule, defaults or subdomain sections.
|
|
|
|
Here a small example for such a rule template::
|
|
|
|
from werkzeug.routing import Map, Rule, RuleTemplate
|
|
|
|
resource = RuleTemplate([
|
|
Rule('/$name/', endpoint='$name.list'),
|
|
Rule('/$name/<int:id>', endpoint='$name.show')
|
|
])
|
|
|
|
url_map = Map([resource(name='user'), resource(name='page')])
|
|
|
|
When a rule template is called the keyword arguments are used to
|
|
replace the placeholders in all the string parameters.
|
|
"""
|
|
|
|
def __init__(self, rules: t.Iterable["Rule"]) -> None:
|
|
self.rules = list(rules)
|
|
|
|
def __call__(self, *args: t.Any, **kwargs: t.Any) -> "RuleTemplateFactory":
|
|
return RuleTemplateFactory(self.rules, dict(*args, **kwargs))
|
|
|
|
|
|
class RuleTemplateFactory(RuleFactory):
|
|
"""A factory that fills in template variables into rules. Used by
|
|
`RuleTemplate` internally.
|
|
|
|
:internal:
|
|
"""
|
|
|
|
def __init__(
|
|
self, rules: t.Iterable[RuleFactory], context: t.Dict[str, t.Any]
|
|
) -> None:
|
|
self.rules = rules
|
|
self.context = context
|
|
|
|
def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
|
|
for rulefactory in self.rules:
|
|
for rule in rulefactory.get_rules(map):
|
|
new_defaults = subdomain = None
|
|
if rule.defaults:
|
|
new_defaults = {}
|
|
for key, value in rule.defaults.items():
|
|
if isinstance(value, str):
|
|
value = Template(value).substitute(self.context)
|
|
new_defaults[key] = value
|
|
if rule.subdomain is not None:
|
|
subdomain = Template(rule.subdomain).substitute(self.context)
|
|
new_endpoint = rule.endpoint
|
|
if isinstance(new_endpoint, str):
|
|
new_endpoint = Template(new_endpoint).substitute(self.context)
|
|
yield Rule(
|
|
Template(rule.rule).substitute(self.context),
|
|
new_defaults,
|
|
subdomain,
|
|
rule.methods,
|
|
rule.build_only,
|
|
new_endpoint,
|
|
rule.strict_slashes,
|
|
)
|
|
|
|
|
|
def _prefix_names(src: str) -> ast.stmt:
|
|
"""ast parse and prefix names with `.` to avoid collision with user vars"""
|
|
tree = ast.parse(src).body[0]
|
|
if isinstance(tree, ast.Expr):
|
|
tree = tree.value # type: ignore
|
|
for node in ast.walk(tree):
|
|
if isinstance(node, ast.Name):
|
|
node.id = f".{node.id}"
|
|
return tree
|
|
|
|
|
|
_CALL_CONVERTER_CODE_FMT = "self._converters[{elem!r}].to_url()"
|
|
_IF_KWARGS_URL_ENCODE_CODE = """\
|
|
if kwargs:
|
|
params = self._encode_query_vars(kwargs)
|
|
q = "?" if params else ""
|
|
else:
|
|
q = params = ""
|
|
"""
|
|
_IF_KWARGS_URL_ENCODE_AST = _prefix_names(_IF_KWARGS_URL_ENCODE_CODE)
|
|
_URL_ENCODE_AST_NAMES = (_prefix_names("q"), _prefix_names("params"))
|
|
|
|
|
|
class Rule(RuleFactory):
|
|
"""A Rule represents one URL pattern. There are some options for `Rule`
|
|
that change the way it behaves and are passed to the `Rule` constructor.
|
|
Note that besides the rule-string all arguments *must* be keyword arguments
|
|
in order to not break the application on Werkzeug upgrades.
|
|
|
|
`string`
|
|
Rule strings basically are just normal URL paths with placeholders in
|
|
the format ``<converter(arguments):name>`` where the converter and the
|
|
arguments are optional. If no converter is defined the `default`
|
|
converter is used which means `string` in the normal configuration.
|
|
|
|
URL rules that end with a slash are branch URLs, others are leaves.
|
|
If you have `strict_slashes` enabled (which is the default), all
|
|
branch URLs that are matched without a trailing slash will trigger a
|
|
redirect to the same URL with the missing slash appended.
|
|
|
|
The converters are defined on the `Map`.
|
|
|
|
`endpoint`
|
|
The endpoint for this rule. This can be anything. A reference to a
|
|
function, a string, a number etc. The preferred way is using a string
|
|
because the endpoint is used for URL generation.
|
|
|
|
`defaults`
|
|
An optional dict with defaults for other rules with the same endpoint.
|
|
This is a bit tricky but useful if you want to have unique URLs::
|
|
|
|
url_map = Map([
|
|
Rule('/all/', defaults={'page': 1}, endpoint='all_entries'),
|
|
Rule('/all/page/<int:page>', endpoint='all_entries')
|
|
])
|
|
|
|
If a user now visits ``http://example.com/all/page/1`` they will be
|
|
redirected to ``http://example.com/all/``. If `redirect_defaults` is
|
|
disabled on the `Map` instance this will only affect the URL
|
|
generation.
|
|
|
|
`subdomain`
|
|
The subdomain rule string for this rule. If not specified the rule
|
|
only matches for the `default_subdomain` of the map. If the map is
|
|
not bound to a subdomain this feature is disabled.
|
|
|
|
Can be useful if you want to have user profiles on different subdomains
|
|
and all subdomains are forwarded to your application::
|
|
|
|
url_map = Map([
|
|
Rule('/', subdomain='<username>', endpoint='user/homepage'),
|
|
Rule('/stats', subdomain='<username>', endpoint='user/stats')
|
|
])
|
|
|
|
`methods`
|
|
A sequence of http methods this rule applies to. If not specified, all
|
|
methods are allowed. For example this can be useful if you want different
|
|
endpoints for `POST` and `GET`. If methods are defined and the path
|
|
matches but the method matched against is not in this list or in the
|
|
list of another rule for that path the error raised is of the type
|
|
`MethodNotAllowed` rather than `NotFound`. If `GET` is present in the
|
|
list of methods and `HEAD` is not, `HEAD` is added automatically.
|
|
|
|
`strict_slashes`
|
|
Override the `Map` setting for `strict_slashes` only for this rule. If
|
|
not specified the `Map` setting is used.
|
|
|
|
`merge_slashes`
|
|
Override :attr:`Map.merge_slashes` for this rule.
|
|
|
|
`build_only`
|
|
Set this to True and the rule will never match but will create a URL
|
|
that can be build. This is useful if you have resources on a subdomain
|
|
or folder that are not handled by the WSGI application (like static data)
|
|
|
|
`redirect_to`
|
|
If given this must be either a string or callable. In case of a
|
|
callable it's called with the url adapter that triggered the match and
|
|
the values of the URL as keyword arguments and has to return the target
|
|
for the redirect, otherwise it has to be a string with placeholders in
|
|
rule syntax::
|
|
|
|
def foo_with_slug(adapter, id):
|
|
# ask the database for the slug for the old id. this of
|
|
# course has nothing to do with werkzeug.
|
|
return f'foo/{Foo.get_slug_for_id(id)}'
|
|
|
|
url_map = Map([
|
|
Rule('/foo/<slug>', endpoint='foo'),
|
|
Rule('/some/old/url/<slug>', redirect_to='foo/<slug>'),
|
|
Rule('/other/old/url/<int:id>', redirect_to=foo_with_slug)
|
|
])
|
|
|
|
When the rule is matched the routing system will raise a
|
|
`RequestRedirect` exception with the target for the redirect.
|
|
|
|
Keep in mind that the URL will be joined against the URL root of the
|
|
script so don't use a leading slash on the target URL unless you
|
|
really mean root of that domain.
|
|
|
|
`alias`
|
|
If enabled this rule serves as an alias for another rule with the same
|
|
endpoint and arguments.
|
|
|
|
`host`
|
|
If provided and the URL map has host matching enabled this can be
|
|
used to provide a match rule for the whole host. This also means
|
|
that the subdomain feature is disabled.
|
|
|
|
`websocket`
|
|
If ``True``, this rule is only matches for WebSocket (``ws://``,
|
|
``wss://``) requests. By default, rules will only match for HTTP
|
|
requests.
|
|
|
|
.. versionchanged:: 2.1
|
|
Percent-encoded newlines (``%0a``), which are decoded by WSGI
|
|
servers, are considered when routing instead of terminating the
|
|
match early.
|
|
|
|
.. versionadded:: 1.0
|
|
Added ``websocket``.
|
|
|
|
.. versionadded:: 1.0
|
|
Added ``merge_slashes``.
|
|
|
|
.. versionadded:: 0.7
|
|
Added ``alias`` and ``host``.
|
|
|
|
.. versionchanged:: 0.6.1
|
|
``HEAD`` is added to ``methods`` if ``GET`` is present.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
string: str,
|
|
defaults: t.Optional[t.Mapping[str, t.Any]] = None,
|
|
subdomain: t.Optional[str] = None,
|
|
methods: t.Optional[t.Iterable[str]] = None,
|
|
build_only: bool = False,
|
|
endpoint: t.Optional[str] = None,
|
|
strict_slashes: t.Optional[bool] = None,
|
|
merge_slashes: t.Optional[bool] = None,
|
|
redirect_to: t.Optional[t.Union[str, t.Callable[..., str]]] = None,
|
|
alias: bool = False,
|
|
host: t.Optional[str] = None,
|
|
websocket: bool = False,
|
|
) -> None:
|
|
if not string.startswith("/"):
|
|
raise ValueError("urls must start with a leading slash")
|
|
self.rule = string
|
|
self.is_leaf = not string.endswith("/")
|
|
self.is_branch = string.endswith("/")
|
|
|
|
self.map: "Map" = None # type: ignore
|
|
self.strict_slashes = strict_slashes
|
|
self.merge_slashes = merge_slashes
|
|
self.subdomain = subdomain
|
|
self.host = host
|
|
self.defaults = defaults
|
|
self.build_only = build_only
|
|
self.alias = alias
|
|
self.websocket = websocket
|
|
|
|
if methods is not None:
|
|
if isinstance(methods, str):
|
|
raise TypeError("'methods' should be a list of strings.")
|
|
|
|
methods = {x.upper() for x in methods}
|
|
|
|
if "HEAD" not in methods and "GET" in methods:
|
|
methods.add("HEAD")
|
|
|
|
if websocket and methods - {"GET", "HEAD", "OPTIONS"}:
|
|
raise ValueError(
|
|
"WebSocket rules can only use 'GET', 'HEAD', and 'OPTIONS' methods."
|
|
)
|
|
|
|
self.methods = methods
|
|
self.endpoint: str = endpoint # type: ignore
|
|
self.redirect_to = redirect_to
|
|
|
|
if defaults:
|
|
self.arguments = set(map(str, defaults))
|
|
else:
|
|
self.arguments = set()
|
|
|
|
self._converters: t.Dict[str, "BaseConverter"] = {}
|
|
self._trace: t.List[t.Tuple[bool, str]] = []
|
|
self._parts: t.List[RulePart] = []
|
|
|
|
def empty(self) -> "Rule":
|
|
"""
|
|
Return an unbound copy of this rule.
|
|
|
|
This can be useful if want to reuse an already bound URL for another
|
|
map. See ``get_empty_kwargs`` to override what keyword arguments are
|
|
provided to the new copy.
|
|
"""
|
|
return type(self)(self.rule, **self.get_empty_kwargs())
|
|
|
|
def get_empty_kwargs(self) -> t.Mapping[str, t.Any]:
|
|
"""
|
|
Provides kwargs for instantiating empty copy with empty()
|
|
|
|
Use this method to provide custom keyword arguments to the subclass of
|
|
``Rule`` when calling ``some_rule.empty()``. Helpful when the subclass
|
|
has custom keyword arguments that are needed at instantiation.
|
|
|
|
Must return a ``dict`` that will be provided as kwargs to the new
|
|
instance of ``Rule``, following the initial ``self.rule`` value which
|
|
is always provided as the first, required positional argument.
|
|
"""
|
|
defaults = None
|
|
if self.defaults:
|
|
defaults = dict(self.defaults)
|
|
return dict(
|
|
defaults=defaults,
|
|
subdomain=self.subdomain,
|
|
methods=self.methods,
|
|
build_only=self.build_only,
|
|
endpoint=self.endpoint,
|
|
strict_slashes=self.strict_slashes,
|
|
redirect_to=self.redirect_to,
|
|
alias=self.alias,
|
|
host=self.host,
|
|
)
|
|
|
|
def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
|
|
yield self
|
|
|
|
def refresh(self) -> None:
|
|
"""Rebinds and refreshes the URL. Call this if you modified the
|
|
rule in place.
|
|
|
|
:internal:
|
|
"""
|
|
self.bind(self.map, rebind=True)
|
|
|
|
def bind(self, map: "Map", rebind: bool = False) -> None:
|
|
"""Bind the url to a map and create a regular expression based on
|
|
the information from the rule itself and the defaults from the map.
|
|
|
|
:internal:
|
|
"""
|
|
if self.map is not None and not rebind:
|
|
raise RuntimeError(f"url rule {self!r} already bound to map {self.map!r}")
|
|
self.map = map
|
|
if self.strict_slashes is None:
|
|
self.strict_slashes = map.strict_slashes
|
|
if self.merge_slashes is None:
|
|
self.merge_slashes = map.merge_slashes
|
|
if self.subdomain is None:
|
|
self.subdomain = map.default_subdomain
|
|
self.compile()
|
|
|
|
def get_converter(
|
|
self,
|
|
variable_name: str,
|
|
converter_name: str,
|
|
args: t.Tuple,
|
|
kwargs: t.Mapping[str, t.Any],
|
|
) -> "BaseConverter":
|
|
"""Looks up the converter for the given parameter.
|
|
|
|
.. versionadded:: 0.9
|
|
"""
|
|
if converter_name not in self.map.converters:
|
|
raise LookupError(f"the converter {converter_name!r} does not exist")
|
|
return self.map.converters[converter_name](self.map, *args, **kwargs)
|
|
|
|
def _encode_query_vars(self, query_vars: t.Mapping[str, t.Any]) -> str:
|
|
return url_encode(
|
|
query_vars,
|
|
charset=self.map.charset,
|
|
sort=self.map.sort_parameters,
|
|
key=self.map.sort_key,
|
|
)
|
|
|
|
def _parse_rule(self, rule: str) -> t.Iterable[RulePart]:
|
|
content = ""
|
|
static = True
|
|
argument_weights = []
|
|
static_weights: t.List[t.Tuple[int, int]] = []
|
|
final = False
|
|
|
|
pos = 0
|
|
while pos < len(rule):
|
|
match = _part_re.match(rule, pos)
|
|
if match is None:
|
|
raise ValueError(f"malformed url rule: {rule!r}")
|
|
|
|
data = match.groupdict()
|
|
if data["static"] is not None:
|
|
static_weights.append((len(static_weights), -len(data["static"])))
|
|
self._trace.append((False, data["static"]))
|
|
content += data["static"] if static else re.escape(data["static"])
|
|
|
|
if data["variable"] is not None:
|
|
if static:
|
|
# Switching content to represent regex, hence the need to escape
|
|
content = re.escape(content)
|
|
static = False
|
|
c_args, c_kwargs = parse_converter_args(data["arguments"] or "")
|
|
convobj = self.get_converter(
|
|
data["variable"], data["converter"] or "default", c_args, c_kwargs
|
|
)
|
|
self._converters[data["variable"]] = convobj
|
|
self.arguments.add(data["variable"])
|
|
if not convobj.part_isolating:
|
|
final = True
|
|
content += f"({convobj.regex})"
|
|
argument_weights.append(convobj.weight)
|
|
self._trace.append((True, data["variable"]))
|
|
|
|
if data["slash"] is not None:
|
|
self._trace.append((False, "/"))
|
|
if final:
|
|
content += "/"
|
|
else:
|
|
if not static:
|
|
content += r"\Z"
|
|
weight = Weighting(
|
|
-len(static_weights),
|
|
static_weights,
|
|
-len(argument_weights),
|
|
argument_weights,
|
|
)
|
|
yield RulePart(
|
|
content=content, final=final, static=static, weight=weight
|
|
)
|
|
content = ""
|
|
static = True
|
|
argument_weights = []
|
|
static_weights = []
|
|
final = False
|
|
|
|
pos = match.end()
|
|
|
|
if not static:
|
|
content += r"\Z"
|
|
weight = Weighting(
|
|
-len(static_weights),
|
|
static_weights,
|
|
-len(argument_weights),
|
|
argument_weights,
|
|
)
|
|
yield RulePart(content=content, final=final, static=static, weight=weight)
|
|
|
|
def compile(self) -> None:
|
|
"""Compiles the regular expression and stores it."""
|
|
assert self.map is not None, "rule not bound"
|
|
|
|
if self.map.host_matching:
|
|
domain_rule = self.host or ""
|
|
else:
|
|
domain_rule = self.subdomain or ""
|
|
self._parts = []
|
|
self._trace = []
|
|
self._converters = {}
|
|
if domain_rule == "":
|
|
self._parts = [
|
|
RulePart(
|
|
content="", final=False, static=True, weight=Weighting(0, [], 0, [])
|
|
)
|
|
]
|
|
else:
|
|
self._parts.extend(self._parse_rule(domain_rule))
|
|
self._trace.append((False, "|"))
|
|
rule = self.rule
|
|
if self.merge_slashes:
|
|
rule = re.sub("/{2,}?", "/", self.rule)
|
|
self._parts.extend(self._parse_rule(rule))
|
|
|
|
self._build: t.Callable[..., t.Tuple[str, str]]
|
|
self._build = self._compile_builder(False).__get__(self, None)
|
|
self._build_unknown: t.Callable[..., t.Tuple[str, str]]
|
|
self._build_unknown = self._compile_builder(True).__get__(self, None)
|
|
|
|
@staticmethod
|
|
def _get_func_code(code: CodeType, name: str) -> t.Callable[..., t.Tuple[str, str]]:
|
|
globs: t.Dict[str, t.Any] = {}
|
|
locs: t.Dict[str, t.Any] = {}
|
|
exec(code, globs, locs)
|
|
return locs[name] # type: ignore
|
|
|
|
def _compile_builder(
|
|
self, append_unknown: bool = True
|
|
) -> t.Callable[..., t.Tuple[str, str]]:
|
|
defaults = self.defaults or {}
|
|
dom_ops: t.List[t.Tuple[bool, str]] = []
|
|
url_ops: t.List[t.Tuple[bool, str]] = []
|
|
|
|
opl = dom_ops
|
|
for is_dynamic, data in self._trace:
|
|
if data == "|" and opl is dom_ops:
|
|
opl = url_ops
|
|
continue
|
|
# this seems like a silly case to ever come up but:
|
|
# if a default is given for a value that appears in the rule,
|
|
# resolve it to a constant ahead of time
|
|
if is_dynamic and data in defaults:
|
|
data = self._converters[data].to_url(defaults[data])
|
|
opl.append((False, data))
|
|
elif not is_dynamic:
|
|
opl.append(
|
|
(False, url_quote(_to_bytes(data, self.map.charset), safe="/:|+"))
|
|
)
|
|
else:
|
|
opl.append((True, data))
|
|
|
|
def _convert(elem: str) -> ast.stmt:
|
|
ret = _prefix_names(_CALL_CONVERTER_CODE_FMT.format(elem=elem))
|
|
ret.args = [ast.Name(str(elem), ast.Load())] # type: ignore # str for py2
|
|
return ret
|
|
|
|
def _parts(ops: t.List[t.Tuple[bool, str]]) -> t.List[ast.AST]:
|
|
parts = [
|
|
_convert(elem) if is_dynamic else ast.Str(s=elem)
|
|
for is_dynamic, elem in ops
|
|
]
|
|
parts = parts or [ast.Str("")]
|
|
# constant fold
|
|
ret = [parts[0]]
|
|
for p in parts[1:]:
|
|
if isinstance(p, ast.Str) and isinstance(ret[-1], ast.Str):
|
|
ret[-1] = ast.Str(ret[-1].s + p.s)
|
|
else:
|
|
ret.append(p)
|
|
return ret
|
|
|
|
dom_parts = _parts(dom_ops)
|
|
url_parts = _parts(url_ops)
|
|
if not append_unknown:
|
|
body = []
|
|
else:
|
|
body = [_IF_KWARGS_URL_ENCODE_AST]
|
|
url_parts.extend(_URL_ENCODE_AST_NAMES)
|
|
|
|
def _join(parts: t.List[ast.AST]) -> ast.AST:
|
|
if len(parts) == 1: # shortcut
|
|
return parts[0]
|
|
return ast.JoinedStr(parts)
|
|
|
|
body.append(
|
|
ast.Return(ast.Tuple([_join(dom_parts), _join(url_parts)], ast.Load()))
|
|
)
|
|
|
|
pargs = [
|
|
elem
|
|
for is_dynamic, elem in dom_ops + url_ops
|
|
if is_dynamic and elem not in defaults
|
|
]
|
|
kargs = [str(k) for k in defaults]
|
|
|
|
func_ast: ast.FunctionDef = _prefix_names("def _(): pass") # type: ignore
|
|
func_ast.name = f"<builder:{self.rule!r}>"
|
|
func_ast.args.args.append(ast.arg(".self", None))
|
|
for arg in pargs + kargs:
|
|
func_ast.args.args.append(ast.arg(arg, None))
|
|
func_ast.args.kwarg = ast.arg(".kwargs", None)
|
|
for _ in kargs:
|
|
func_ast.args.defaults.append(ast.Str(""))
|
|
func_ast.body = body
|
|
|
|
# use `ast.parse` instead of `ast.Module` for better portability
|
|
# Python 3.8 changes the signature of `ast.Module`
|
|
module = ast.parse("")
|
|
module.body = [func_ast]
|
|
|
|
# mark everything as on line 1, offset 0
|
|
# less error-prone than `ast.fix_missing_locations`
|
|
# bad line numbers cause an assert to fail in debug builds
|
|
for node in ast.walk(module):
|
|
if "lineno" in node._attributes:
|
|
node.lineno = 1
|
|
if "end_lineno" in node._attributes:
|
|
node.end_lineno = node.lineno # type: ignore[attr-defined]
|
|
if "col_offset" in node._attributes:
|
|
node.col_offset = 0
|
|
if "end_col_offset" in node._attributes:
|
|
node.end_col_offset = node.col_offset # type: ignore[attr-defined]
|
|
|
|
code = compile(module, "<werkzeug routing>", "exec")
|
|
return self._get_func_code(code, func_ast.name)
|
|
|
|
def build(
|
|
self, values: t.Mapping[str, t.Any], append_unknown: bool = True
|
|
) -> t.Optional[t.Tuple[str, str]]:
|
|
"""Assembles the relative url for that rule and the subdomain.
|
|
If building doesn't work for some reasons `None` is returned.
|
|
|
|
:internal:
|
|
"""
|
|
try:
|
|
if append_unknown:
|
|
return self._build_unknown(**values)
|
|
else:
|
|
return self._build(**values)
|
|
except ValidationError:
|
|
return None
|
|
|
|
def provides_defaults_for(self, rule: "Rule") -> bool:
|
|
"""Check if this rule has defaults for a given rule.
|
|
|
|
:internal:
|
|
"""
|
|
return bool(
|
|
not self.build_only
|
|
and self.defaults
|
|
and self.endpoint == rule.endpoint
|
|
and self != rule
|
|
and self.arguments == rule.arguments
|
|
)
|
|
|
|
def suitable_for(
|
|
self, values: t.Mapping[str, t.Any], method: t.Optional[str] = None
|
|
) -> bool:
|
|
"""Check if the dict of values has enough data for url generation.
|
|
|
|
:internal:
|
|
"""
|
|
# if a method was given explicitly and that method is not supported
|
|
# by this rule, this rule is not suitable.
|
|
if (
|
|
method is not None
|
|
and self.methods is not None
|
|
and method not in self.methods
|
|
):
|
|
return False
|
|
|
|
defaults = self.defaults or ()
|
|
|
|
# all arguments required must be either in the defaults dict or
|
|
# the value dictionary otherwise it's not suitable
|
|
for key in self.arguments:
|
|
if key not in defaults and key not in values:
|
|
return False
|
|
|
|
# in case defaults are given we ensure that either the value was
|
|
# skipped or the value is the same as the default value.
|
|
if defaults:
|
|
for key, value in defaults.items():
|
|
if key in values and value != values[key]:
|
|
return False
|
|
|
|
return True
|
|
|
|
def build_compare_key(self) -> t.Tuple[int, int, int]:
|
|
"""The build compare key for sorting.
|
|
|
|
:internal:
|
|
"""
|
|
return (1 if self.alias else 0, -len(self.arguments), -len(self.defaults or ()))
|
|
|
|
def __eq__(self, other: object) -> bool:
|
|
return isinstance(other, type(self)) and self._trace == other._trace
|
|
|
|
__hash__ = None # type: ignore
|
|
|
|
def __str__(self) -> str:
|
|
return self.rule
|
|
|
|
def __repr__(self) -> str:
|
|
if self.map is None:
|
|
return f"<{type(self).__name__} (unbound)>"
|
|
parts = []
|
|
for is_dynamic, data in self._trace:
|
|
if is_dynamic:
|
|
parts.append(f"<{data}>")
|
|
else:
|
|
parts.append(data)
|
|
parts = "".join(parts).lstrip("|")
|
|
methods = f" ({', '.join(self.methods)})" if self.methods is not None else ""
|
|
return f"<{type(self).__name__} {parts!r}{methods} -> {self.endpoint}>"
|