676 lines
21 KiB
Python
676 lines
21 KiB
Python
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import tempfile
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import typing
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from collections import namedtuple
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from collections.abc import Sequence
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from shlex import shlex
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from urllib.parse import SplitResult, parse_qsl, urlencode, urlsplit
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from starlette.concurrency import run_in_threadpool
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from starlette.types import Scope
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Address = namedtuple("Address", ["host", "port"])
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class URL:
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def __init__(
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self, url: str = "", scope: Scope = None, **components: typing.Any
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) -> None:
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if scope is not None:
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assert not url, 'Cannot set both "url" and "scope".'
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assert not components, 'Cannot set both "scope" and "**components".'
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scheme = scope.get("scheme", "http")
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server = scope.get("server", None)
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path = scope.get("root_path", "") + scope["path"]
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query_string = scope.get("query_string", b"")
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host_header = None
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for key, value in scope["headers"]:
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if key == b"host":
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host_header = value.decode("latin-1")
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break
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if host_header is not None:
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url = f"{scheme}://{host_header}{path}"
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elif server is None:
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url = path
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else:
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host, port = server
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default_port = {"http": 80, "https": 443, "ws": 80, "wss": 443}[scheme]
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if port == default_port:
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url = f"{scheme}://{host}{path}"
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else:
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url = f"{scheme}://{host}:{port}{path}"
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if query_string:
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url += "?" + query_string.decode()
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elif components:
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assert not url, 'Cannot set both "url" and "**components".'
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url = URL("").replace(**components).components.geturl()
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self._url = url
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@property
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def components(self) -> SplitResult:
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if not hasattr(self, "_components"):
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self._components = urlsplit(self._url)
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return self._components
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@property
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def scheme(self) -> str:
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return self.components.scheme
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@property
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def netloc(self) -> str:
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return self.components.netloc
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@property
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def path(self) -> str:
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return self.components.path
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@property
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def query(self) -> str:
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return self.components.query
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@property
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def fragment(self) -> str:
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return self.components.fragment
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@property
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def username(self) -> typing.Union[None, str]:
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return self.components.username
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@property
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def password(self) -> typing.Union[None, str]:
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return self.components.password
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@property
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def hostname(self) -> typing.Union[None, str]:
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return self.components.hostname
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@property
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def port(self) -> typing.Optional[int]:
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return self.components.port
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@property
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def is_secure(self) -> bool:
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return self.scheme in ("https", "wss")
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def replace(self, **kwargs: typing.Any) -> "URL":
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if (
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"username" in kwargs
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or "password" in kwargs
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or "hostname" in kwargs
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or "port" in kwargs
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):
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hostname = kwargs.pop("hostname", self.hostname)
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port = kwargs.pop("port", self.port)
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username = kwargs.pop("username", self.username)
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password = kwargs.pop("password", self.password)
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netloc = hostname
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if port is not None:
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netloc += f":{port}"
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if username is not None:
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userpass = username
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if password is not None:
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userpass += f":{password}"
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netloc = f"{userpass}@{netloc}"
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kwargs["netloc"] = netloc
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components = self.components._replace(**kwargs)
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return self.__class__(components.geturl())
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def include_query_params(self, **kwargs: typing.Any) -> "URL":
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params = MultiDict(parse_qsl(self.query, keep_blank_values=True))
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params.update({str(key): str(value) for key, value in kwargs.items()})
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query = urlencode(params.multi_items())
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return self.replace(query=query)
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def replace_query_params(self, **kwargs: typing.Any) -> "URL":
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query = urlencode([(str(key), str(value)) for key, value in kwargs.items()])
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return self.replace(query=query)
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def remove_query_params(
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self, keys: typing.Union[str, typing.Sequence[str]]
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) -> "URL":
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if isinstance(keys, str):
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keys = [keys]
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params = MultiDict(parse_qsl(self.query, keep_blank_values=True))
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for key in keys:
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params.pop(key, None)
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query = urlencode(params.multi_items())
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return self.replace(query=query)
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def __eq__(self, other: typing.Any) -> bool:
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return str(self) == str(other)
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def __str__(self) -> str:
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return self._url
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def __repr__(self) -> str:
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url = str(self)
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if self.password:
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url = str(self.replace(password="********"))
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return f"{self.__class__.__name__}({repr(url)})"
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class URLPath(str):
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"""
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A URL path string that may also hold an associated protocol and/or host.
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Used by the routing to return `url_path_for` matches.
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"""
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def __new__(cls, path: str, protocol: str = "", host: str = "") -> "URLPath":
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assert protocol in ("http", "websocket", "")
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return str.__new__(cls, path) # type: ignore
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def __init__(self, path: str, protocol: str = "", host: str = "") -> None:
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self.protocol = protocol
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self.host = host
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def make_absolute_url(self, base_url: typing.Union[str, URL]) -> str:
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if isinstance(base_url, str):
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base_url = URL(base_url)
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if self.protocol:
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scheme = {
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"http": {True: "https", False: "http"},
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"websocket": {True: "wss", False: "ws"},
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}[self.protocol][base_url.is_secure]
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else:
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scheme = base_url.scheme
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if self.host:
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netloc = self.host
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else:
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netloc = base_url.netloc
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path = base_url.path.rstrip("/") + str(self)
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return str(URL(scheme=scheme, netloc=netloc, path=path))
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class Secret:
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"""
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Holds a string value that should not be revealed in tracebacks etc.
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You should cast the value to `str` at the point it is required.
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"""
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def __init__(self, value: str):
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self._value = value
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def __repr__(self) -> str:
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class_name = self.__class__.__name__
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return f"{class_name}('**********')"
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def __str__(self) -> str:
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return self._value
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class CommaSeparatedStrings(Sequence):
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def __init__(self, value: typing.Union[str, typing.Sequence[str]]):
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if isinstance(value, str):
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splitter = shlex(value, posix=True)
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splitter.whitespace = ","
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splitter.whitespace_split = True
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self._items = [item.strip() for item in splitter]
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else:
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self._items = list(value)
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def __len__(self) -> int:
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return len(self._items)
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def __getitem__(self, index: typing.Union[int, slice]) -> typing.Any:
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return self._items[index]
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def __iter__(self) -> typing.Iterator[str]:
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return iter(self._items)
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def __repr__(self) -> str:
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class_name = self.__class__.__name__
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items = [item for item in self]
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return f"{class_name}({items!r})"
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def __str__(self) -> str:
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return ", ".join([repr(item) for item in self])
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class ImmutableMultiDict(typing.Mapping):
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def __init__(
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self,
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*args: typing.Union[
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"ImmutableMultiDict",
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typing.Mapping,
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typing.List[typing.Tuple[typing.Any, typing.Any]],
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],
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**kwargs: typing.Any,
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) -> None:
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assert len(args) < 2, "Too many arguments."
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if args:
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value = args[0]
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else:
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value = []
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if kwargs:
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value = (
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ImmutableMultiDict(value).multi_items()
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+ ImmutableMultiDict(kwargs).multi_items()
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)
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if not value:
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_items = [] # type: typing.List[typing.Tuple[typing.Any, typing.Any]]
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elif hasattr(value, "multi_items"):
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value = typing.cast(ImmutableMultiDict, value)
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_items = list(value.multi_items())
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elif hasattr(value, "items"):
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value = typing.cast(typing.Mapping, value)
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_items = list(value.items())
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else:
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value = typing.cast(
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typing.List[typing.Tuple[typing.Any, typing.Any]], value
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)
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_items = list(value)
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self._dict = {k: v for k, v in _items}
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self._list = _items
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def getlist(self, key: typing.Any) -> typing.List[str]:
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return [item_value for item_key, item_value in self._list if item_key == key]
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def keys(self) -> typing.KeysView:
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return self._dict.keys()
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def values(self) -> typing.ValuesView:
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return self._dict.values()
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def items(self) -> typing.ItemsView:
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return self._dict.items()
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def multi_items(self) -> typing.List[typing.Tuple[str, str]]:
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return list(self._list)
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def get(self, key: typing.Any, default: typing.Any = None) -> typing.Any:
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if key in self._dict:
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return self._dict[key]
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return default
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def __getitem__(self, key: typing.Any) -> str:
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return self._dict[key]
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def __contains__(self, key: typing.Any) -> bool:
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return key in self._dict
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def __iter__(self) -> typing.Iterator[typing.Any]:
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return iter(self.keys())
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def __len__(self) -> int:
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return len(self._dict)
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def __eq__(self, other: typing.Any) -> bool:
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if not isinstance(other, self.__class__):
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return False
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return sorted(self._list) == sorted(other._list)
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def __repr__(self) -> str:
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class_name = self.__class__.__name__
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items = self.multi_items()
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return f"{class_name}({items!r})"
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class MultiDict(ImmutableMultiDict):
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def __setitem__(self, key: typing.Any, value: typing.Any) -> None:
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self.setlist(key, [value])
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def __delitem__(self, key: typing.Any) -> None:
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self._list = [(k, v) for k, v in self._list if k != key]
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del self._dict[key]
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def pop(self, key: typing.Any, default: typing.Any = None) -> typing.Any:
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self._list = [(k, v) for k, v in self._list if k != key]
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return self._dict.pop(key, default)
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def popitem(self) -> typing.Tuple:
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key, value = self._dict.popitem()
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self._list = [(k, v) for k, v in self._list if k != key]
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return key, value
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def poplist(self, key: typing.Any) -> typing.List:
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values = [v for k, v in self._list if k == key]
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self.pop(key)
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return values
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def clear(self) -> None:
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self._dict.clear()
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self._list.clear()
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def setdefault(self, key: typing.Any, default: typing.Any = None) -> typing.Any:
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if key not in self:
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self._dict[key] = default
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self._list.append((key, default))
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return self[key]
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def setlist(self, key: typing.Any, values: typing.List) -> None:
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if not values:
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self.pop(key, None)
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else:
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existing_items = [(k, v) for (k, v) in self._list if k != key]
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self._list = existing_items + [(key, value) for value in values]
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self._dict[key] = values[-1]
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def append(self, key: typing.Any, value: typing.Any) -> None:
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self._list.append((key, value))
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self._dict[key] = value
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def update(
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self,
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*args: typing.Union[
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"MultiDict",
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typing.Mapping,
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typing.List[typing.Tuple[typing.Any, typing.Any]],
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],
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**kwargs: typing.Any,
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) -> None:
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value = MultiDict(*args, **kwargs)
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existing_items = [(k, v) for (k, v) in self._list if k not in value.keys()]
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self._list = existing_items + value.multi_items()
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self._dict.update(value)
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class QueryParams(ImmutableMultiDict):
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"""
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An immutable multidict.
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"""
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def __init__(
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self,
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|
|
*args: typing.Union[
|
||
|
|
"ImmutableMultiDict",
|
||
|
|
typing.Mapping,
|
||
|
|
typing.List[typing.Tuple[typing.Any, typing.Any]],
|
||
|
|
str,
|
||
|
|
bytes,
|
||
|
|
],
|
||
|
|
**kwargs: typing.Any,
|
||
|
|
) -> None:
|
||
|
|
assert len(args) < 2, "Too many arguments."
|
||
|
|
|
||
|
|
value = args[0] if args else []
|
||
|
|
|
||
|
|
if isinstance(value, str):
|
||
|
|
super().__init__(parse_qsl(value, keep_blank_values=True), **kwargs)
|
||
|
|
elif isinstance(value, bytes):
|
||
|
|
super().__init__(
|
||
|
|
parse_qsl(value.decode("latin-1"), keep_blank_values=True), **kwargs
|
||
|
|
)
|
||
|
|
else:
|
||
|
|
super().__init__(*args, **kwargs) # type: ignore
|
||
|
|
self._list = [(str(k), str(v)) for k, v in self._list]
|
||
|
|
self._dict = {str(k): str(v) for k, v in self._dict.items()}
|
||
|
|
|
||
|
|
def __str__(self) -> str:
|
||
|
|
return urlencode(self._list)
|
||
|
|
|
||
|
|
def __repr__(self) -> str:
|
||
|
|
class_name = self.__class__.__name__
|
||
|
|
query_string = str(self)
|
||
|
|
return f"{class_name}({query_string!r})"
|
||
|
|
|
||
|
|
|
||
|
|
class UploadFile:
|
||
|
|
"""
|
||
|
|
An uploaded file included as part of the request data.
|
||
|
|
"""
|
||
|
|
|
||
|
|
spool_max_size = 1024 * 1024
|
||
|
|
|
||
|
|
def __init__(
|
||
|
|
self, filename: str, file: typing.IO = None, content_type: str = ""
|
||
|
|
) -> None:
|
||
|
|
self.filename = filename
|
||
|
|
self.content_type = content_type
|
||
|
|
if file is None:
|
||
|
|
file = tempfile.SpooledTemporaryFile(max_size=self.spool_max_size)
|
||
|
|
self.file = file
|
||
|
|
|
||
|
|
@property
|
||
|
|
def _in_memory(self) -> bool:
|
||
|
|
rolled_to_disk = getattr(self.file, "_rolled", True)
|
||
|
|
return not rolled_to_disk
|
||
|
|
|
||
|
|
async def write(self, data: typing.Union[bytes, str]) -> None:
|
||
|
|
if self._in_memory:
|
||
|
|
self.file.write(data) # type: ignore
|
||
|
|
else:
|
||
|
|
await run_in_threadpool(self.file.write, data)
|
||
|
|
|
||
|
|
async def read(self, size: int = -1) -> typing.Union[bytes, str]:
|
||
|
|
if self._in_memory:
|
||
|
|
return self.file.read(size)
|
||
|
|
return await run_in_threadpool(self.file.read, size)
|
||
|
|
|
||
|
|
async def seek(self, offset: int) -> None:
|
||
|
|
if self._in_memory:
|
||
|
|
self.file.seek(offset)
|
||
|
|
else:
|
||
|
|
await run_in_threadpool(self.file.seek, offset)
|
||
|
|
|
||
|
|
async def close(self) -> None:
|
||
|
|
if self._in_memory:
|
||
|
|
self.file.close()
|
||
|
|
else:
|
||
|
|
await run_in_threadpool(self.file.close)
|
||
|
|
|
||
|
|
|
||
|
|
class FormData(ImmutableMultiDict):
|
||
|
|
"""
|
||
|
|
An immutable multidict, containing both file uploads and text input.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(
|
||
|
|
self,
|
||
|
|
*args: typing.Union[
|
||
|
|
"FormData",
|
||
|
|
typing.Mapping[str, typing.Union[str, UploadFile]],
|
||
|
|
typing.List[typing.Tuple[str, typing.Union[str, UploadFile]]],
|
||
|
|
],
|
||
|
|
**kwargs: typing.Union[str, UploadFile],
|
||
|
|
) -> None:
|
||
|
|
super().__init__(*args, **kwargs)
|
||
|
|
|
||
|
|
async def close(self) -> None:
|
||
|
|
for key, value in self.multi_items():
|
||
|
|
if isinstance(value, UploadFile):
|
||
|
|
await value.close()
|
||
|
|
|
||
|
|
|
||
|
|
class Headers(typing.Mapping[str, str]):
|
||
|
|
"""
|
||
|
|
An immutable, case-insensitive multidict.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(
|
||
|
|
self,
|
||
|
|
headers: typing.Mapping[str, str] = None,
|
||
|
|
raw: typing.List[typing.Tuple[bytes, bytes]] = None,
|
||
|
|
scope: Scope = None,
|
||
|
|
) -> None:
|
||
|
|
self._list = [] # type: typing.List[typing.Tuple[bytes, bytes]]
|
||
|
|
if headers is not None:
|
||
|
|
assert raw is None, 'Cannot set both "headers" and "raw".'
|
||
|
|
assert scope is None, 'Cannot set both "headers" and "scope".'
|
||
|
|
self._list = [
|
||
|
|
(key.lower().encode("latin-1"), value.encode("latin-1"))
|
||
|
|
for key, value in headers.items()
|
||
|
|
]
|
||
|
|
elif raw is not None:
|
||
|
|
assert scope is None, 'Cannot set both "raw" and "scope".'
|
||
|
|
self._list = raw
|
||
|
|
elif scope is not None:
|
||
|
|
self._list = scope["headers"]
|
||
|
|
|
||
|
|
@property
|
||
|
|
def raw(self) -> typing.List[typing.Tuple[bytes, bytes]]:
|
||
|
|
return list(self._list)
|
||
|
|
|
||
|
|
def keys(self) -> typing.List[str]: # type: ignore
|
||
|
|
return [key.decode("latin-1") for key, value in self._list]
|
||
|
|
|
||
|
|
def values(self) -> typing.List[str]: # type: ignore
|
||
|
|
return [value.decode("latin-1") for key, value in self._list]
|
||
|
|
|
||
|
|
def items(self) -> typing.List[typing.Tuple[str, str]]: # type: ignore
|
||
|
|
return [
|
||
|
|
(key.decode("latin-1"), value.decode("latin-1"))
|
||
|
|
for key, value in self._list
|
||
|
|
]
|
||
|
|
|
||
|
|
def get(self, key: str, default: typing.Any = None) -> typing.Any:
|
||
|
|
try:
|
||
|
|
return self[key]
|
||
|
|
except KeyError:
|
||
|
|
return default
|
||
|
|
|
||
|
|
def getlist(self, key: str) -> typing.List[str]:
|
||
|
|
get_header_key = key.lower().encode("latin-1")
|
||
|
|
return [
|
||
|
|
item_value.decode("latin-1")
|
||
|
|
for item_key, item_value in self._list
|
||
|
|
if item_key == get_header_key
|
||
|
|
]
|
||
|
|
|
||
|
|
def mutablecopy(self) -> "MutableHeaders":
|
||
|
|
return MutableHeaders(raw=self._list[:])
|
||
|
|
|
||
|
|
def __getitem__(self, key: str) -> str:
|
||
|
|
get_header_key = key.lower().encode("latin-1")
|
||
|
|
for header_key, header_value in self._list:
|
||
|
|
if header_key == get_header_key:
|
||
|
|
return header_value.decode("latin-1")
|
||
|
|
raise KeyError(key)
|
||
|
|
|
||
|
|
def __contains__(self, key: typing.Any) -> bool:
|
||
|
|
get_header_key = key.lower().encode("latin-1")
|
||
|
|
for header_key, header_value in self._list:
|
||
|
|
if header_key == get_header_key:
|
||
|
|
return True
|
||
|
|
return False
|
||
|
|
|
||
|
|
def __iter__(self) -> typing.Iterator[typing.Any]:
|
||
|
|
return iter(self.keys())
|
||
|
|
|
||
|
|
def __len__(self) -> int:
|
||
|
|
return len(self._list)
|
||
|
|
|
||
|
|
def __eq__(self, other: typing.Any) -> bool:
|
||
|
|
if not isinstance(other, Headers):
|
||
|
|
return False
|
||
|
|
return sorted(self._list) == sorted(other._list)
|
||
|
|
|
||
|
|
def __repr__(self) -> str:
|
||
|
|
class_name = self.__class__.__name__
|
||
|
|
as_dict = dict(self.items())
|
||
|
|
if len(as_dict) == len(self):
|
||
|
|
return f"{class_name}({as_dict!r})"
|
||
|
|
return f"{class_name}(raw={self.raw!r})"
|
||
|
|
|
||
|
|
|
||
|
|
class MutableHeaders(Headers):
|
||
|
|
def __setitem__(self, key: str, value: str) -> None:
|
||
|
|
"""
|
||
|
|
Set the header `key` to `value`, removing any duplicate entries.
|
||
|
|
Retains insertion order.
|
||
|
|
"""
|
||
|
|
set_key = key.lower().encode("latin-1")
|
||
|
|
set_value = value.encode("latin-1")
|
||
|
|
|
||
|
|
found_indexes = []
|
||
|
|
for idx, (item_key, item_value) in enumerate(self._list):
|
||
|
|
if item_key == set_key:
|
||
|
|
found_indexes.append(idx)
|
||
|
|
|
||
|
|
for idx in reversed(found_indexes[1:]):
|
||
|
|
del self._list[idx]
|
||
|
|
|
||
|
|
if found_indexes:
|
||
|
|
idx = found_indexes[0]
|
||
|
|
self._list[idx] = (set_key, set_value)
|
||
|
|
else:
|
||
|
|
self._list.append((set_key, set_value))
|
||
|
|
|
||
|
|
def __delitem__(self, key: str) -> None:
|
||
|
|
"""
|
||
|
|
Remove the header `key`.
|
||
|
|
"""
|
||
|
|
del_key = key.lower().encode("latin-1")
|
||
|
|
|
||
|
|
pop_indexes = []
|
||
|
|
for idx, (item_key, item_value) in enumerate(self._list):
|
||
|
|
if item_key == del_key:
|
||
|
|
pop_indexes.append(idx)
|
||
|
|
|
||
|
|
for idx in reversed(pop_indexes):
|
||
|
|
del self._list[idx]
|
||
|
|
|
||
|
|
@property
|
||
|
|
def raw(self) -> typing.List[typing.Tuple[bytes, bytes]]:
|
||
|
|
return self._list
|
||
|
|
|
||
|
|
def setdefault(self, key: str, value: str) -> str:
|
||
|
|
"""
|
||
|
|
If the header `key` does not exist, then set it to `value`.
|
||
|
|
Returns the header value.
|
||
|
|
"""
|
||
|
|
set_key = key.lower().encode("latin-1")
|
||
|
|
set_value = value.encode("latin-1")
|
||
|
|
|
||
|
|
for idx, (item_key, item_value) in enumerate(self._list):
|
||
|
|
if item_key == set_key:
|
||
|
|
return item_value.decode("latin-1")
|
||
|
|
self._list.append((set_key, set_value))
|
||
|
|
return value
|
||
|
|
|
||
|
|
def update(self, other: dict) -> None:
|
||
|
|
for key, val in other.items():
|
||
|
|
self[key] = val
|
||
|
|
|
||
|
|
def append(self, key: str, value: str) -> None:
|
||
|
|
"""
|
||
|
|
Append a header, preserving any duplicate entries.
|
||
|
|
"""
|
||
|
|
append_key = key.lower().encode("latin-1")
|
||
|
|
append_value = value.encode("latin-1")
|
||
|
|
self._list.append((append_key, append_value))
|
||
|
|
|
||
|
|
def add_vary_header(self, vary: str) -> None:
|
||
|
|
existing = self.get("vary")
|
||
|
|
if existing is not None:
|
||
|
|
vary = ", ".join([existing, vary])
|
||
|
|
self["vary"] = vary
|
||
|
|
|
||
|
|
|
||
|
|
class State(object):
|
||
|
|
"""
|
||
|
|
An object that can be used to store arbitrary state.
|
||
|
|
|
||
|
|
Used for `request.state` and `app.state`.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, state: typing.Dict = None):
|
||
|
|
if state is None:
|
||
|
|
state = {}
|
||
|
|
super(State, self).__setattr__("_state", state)
|
||
|
|
|
||
|
|
def __setattr__(self, key: typing.Any, value: typing.Any) -> None:
|
||
|
|
self._state[key] = value
|
||
|
|
|
||
|
|
def __getattr__(self, key: typing.Any) -> typing.Any:
|
||
|
|
try:
|
||
|
|
return self._state[key]
|
||
|
|
except KeyError:
|
||
|
|
message = "'{}' object has no attribute '{}'"
|
||
|
|
raise AttributeError(message.format(self.__class__.__name__, key))
|
||
|
|
|
||
|
|
def __delattr__(self, key: typing.Any) -> None:
|
||
|
|
del self._state[key]
|