mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-16 01:45:08 +00:00
463 lines
16 KiB
Python
463 lines
16 KiB
Python
from __future__ import annotations
|
|
|
|
import typing
|
|
from collections import OrderedDict
|
|
from enum import Enum, auto
|
|
from threading import RLock
|
|
|
|
if typing.TYPE_CHECKING:
|
|
# We can only import Protocol if TYPE_CHECKING because it's a development
|
|
# dependency, and is not available at runtime.
|
|
from typing_extensions import Protocol
|
|
|
|
class HasGettableStringKeys(Protocol):
|
|
def keys(self) -> typing.Iterator[str]:
|
|
...
|
|
|
|
def __getitem__(self, key: str) -> str:
|
|
...
|
|
|
|
|
|
__all__ = ["RecentlyUsedContainer", "HTTPHeaderDict"]
|
|
|
|
|
|
# Key type
|
|
_KT = typing.TypeVar("_KT")
|
|
# Value type
|
|
_VT = typing.TypeVar("_VT")
|
|
# Default type
|
|
_DT = typing.TypeVar("_DT")
|
|
|
|
ValidHTTPHeaderSource = typing.Union[
|
|
"HTTPHeaderDict",
|
|
typing.Mapping[str, str],
|
|
typing.Iterable[typing.Tuple[str, str]],
|
|
"HasGettableStringKeys",
|
|
]
|
|
|
|
|
|
class _Sentinel(Enum):
|
|
not_passed = auto()
|
|
|
|
|
|
def ensure_can_construct_http_header_dict(
|
|
potential: object,
|
|
) -> ValidHTTPHeaderSource | None:
|
|
if isinstance(potential, HTTPHeaderDict):
|
|
return potential
|
|
elif isinstance(potential, typing.Mapping):
|
|
# Full runtime checking of the contents of a Mapping is expensive, so for the
|
|
# purposes of typechecking, we assume that any Mapping is the right shape.
|
|
return typing.cast(typing.Mapping[str, str], potential)
|
|
elif isinstance(potential, typing.Iterable):
|
|
# Similarly to Mapping, full runtime checking of the contents of an Iterable is
|
|
# expensive, so for the purposes of typechecking, we assume that any Iterable
|
|
# is the right shape.
|
|
return typing.cast(typing.Iterable[typing.Tuple[str, str]], potential)
|
|
elif hasattr(potential, "keys") and hasattr(potential, "__getitem__"):
|
|
return typing.cast("HasGettableStringKeys", potential)
|
|
else:
|
|
return None
|
|
|
|
|
|
class RecentlyUsedContainer(typing.Generic[_KT, _VT], typing.MutableMapping[_KT, _VT]):
|
|
"""
|
|
Provides a thread-safe dict-like container which maintains up to
|
|
``maxsize`` keys while throwing away the least-recently-used keys beyond
|
|
``maxsize``.
|
|
|
|
:param maxsize:
|
|
Maximum number of recent elements to retain.
|
|
|
|
:param dispose_func:
|
|
Every time an item is evicted from the container,
|
|
``dispose_func(value)`` is called. Callback which will get called
|
|
"""
|
|
|
|
_container: typing.OrderedDict[_KT, _VT]
|
|
_maxsize: int
|
|
dispose_func: typing.Callable[[_VT], None] | None
|
|
lock: RLock
|
|
|
|
def __init__(
|
|
self,
|
|
maxsize: int = 10,
|
|
dispose_func: typing.Callable[[_VT], None] | None = None,
|
|
) -> None:
|
|
super().__init__()
|
|
self._maxsize = maxsize
|
|
self.dispose_func = dispose_func
|
|
self._container = OrderedDict()
|
|
self.lock = RLock()
|
|
|
|
def __getitem__(self, key: _KT) -> _VT:
|
|
# Re-insert the item, moving it to the end of the eviction line.
|
|
with self.lock:
|
|
item = self._container.pop(key)
|
|
self._container[key] = item
|
|
return item
|
|
|
|
def __setitem__(self, key: _KT, value: _VT) -> None:
|
|
evicted_item = None
|
|
with self.lock:
|
|
# Possibly evict the existing value of 'key'
|
|
try:
|
|
# If the key exists, we'll overwrite it, which won't change the
|
|
# size of the pool. Because accessing a key should move it to
|
|
# the end of the eviction line, we pop it out first.
|
|
evicted_item = key, self._container.pop(key)
|
|
self._container[key] = value
|
|
except KeyError:
|
|
# When the key does not exist, we insert the value first so that
|
|
# evicting works in all cases, including when self._maxsize is 0
|
|
self._container[key] = value
|
|
if len(self._container) > self._maxsize:
|
|
# If we didn't evict an existing value, and we've hit our maximum
|
|
# size, then we have to evict the least recently used item from
|
|
# the beginning of the container.
|
|
evicted_item = self._container.popitem(last=False)
|
|
|
|
# After releasing the lock on the pool, dispose of any evicted value.
|
|
if evicted_item is not None and self.dispose_func:
|
|
_, evicted_value = evicted_item
|
|
self.dispose_func(evicted_value)
|
|
|
|
def __delitem__(self, key: _KT) -> None:
|
|
with self.lock:
|
|
value = self._container.pop(key)
|
|
|
|
if self.dispose_func:
|
|
self.dispose_func(value)
|
|
|
|
def __len__(self) -> int:
|
|
with self.lock:
|
|
return len(self._container)
|
|
|
|
def __iter__(self) -> typing.NoReturn:
|
|
raise NotImplementedError(
|
|
"Iteration over this class is unlikely to be threadsafe."
|
|
)
|
|
|
|
def clear(self) -> None:
|
|
with self.lock:
|
|
# Copy pointers to all values, then wipe the mapping
|
|
values = list(self._container.values())
|
|
self._container.clear()
|
|
|
|
if self.dispose_func:
|
|
for value in values:
|
|
self.dispose_func(value)
|
|
|
|
def keys(self) -> set[_KT]: # type: ignore[override]
|
|
with self.lock:
|
|
return set(self._container.keys())
|
|
|
|
|
|
class HTTPHeaderDictItemView(typing.Set[typing.Tuple[str, str]]):
|
|
"""
|
|
HTTPHeaderDict is unusual for a Mapping[str, str] in that it has two modes of
|
|
address.
|
|
|
|
If we directly try to get an item with a particular name, we will get a string
|
|
back that is the concatenated version of all the values:
|
|
|
|
>>> d['X-Header-Name']
|
|
'Value1, Value2, Value3'
|
|
|
|
However, if we iterate over an HTTPHeaderDict's items, we will optionally combine
|
|
these values based on whether combine=True was called when building up the dictionary
|
|
|
|
>>> d = HTTPHeaderDict({"A": "1", "B": "foo"})
|
|
>>> d.add("A", "2", combine=True)
|
|
>>> d.add("B", "bar")
|
|
>>> list(d.items())
|
|
[
|
|
('A', '1, 2'),
|
|
('B', 'foo'),
|
|
('B', 'bar'),
|
|
]
|
|
|
|
This class conforms to the interface required by the MutableMapping ABC while
|
|
also giving us the nonstandard iteration behavior we want; items with duplicate
|
|
keys, ordered by time of first insertion.
|
|
"""
|
|
|
|
_headers: HTTPHeaderDict
|
|
|
|
def __init__(self, headers: HTTPHeaderDict) -> None:
|
|
self._headers = headers
|
|
|
|
def __len__(self) -> int:
|
|
return len(list(self._headers.iteritems()))
|
|
|
|
def __iter__(self) -> typing.Iterator[tuple[str, str]]:
|
|
return self._headers.iteritems()
|
|
|
|
def __contains__(self, item: object) -> bool:
|
|
if isinstance(item, tuple) and len(item) == 2:
|
|
passed_key, passed_val = item
|
|
if isinstance(passed_key, str) and isinstance(passed_val, str):
|
|
return self._headers._has_value_for_header(passed_key, passed_val)
|
|
return False
|
|
|
|
|
|
class HTTPHeaderDict(typing.MutableMapping[str, str]):
|
|
"""
|
|
:param headers:
|
|
An iterable of field-value pairs. Must not contain multiple field names
|
|
when compared case-insensitively.
|
|
|
|
:param kwargs:
|
|
Additional field-value pairs to pass in to ``dict.update``.
|
|
|
|
A ``dict`` like container for storing HTTP Headers.
|
|
|
|
Field names are stored and compared case-insensitively in compliance with
|
|
RFC 7230. Iteration provides the first case-sensitive key seen for each
|
|
case-insensitive pair.
|
|
|
|
Using ``__setitem__`` syntax overwrites fields that compare equal
|
|
case-insensitively in order to maintain ``dict``'s api. For fields that
|
|
compare equal, instead create a new ``HTTPHeaderDict`` and use ``.add``
|
|
in a loop.
|
|
|
|
If multiple fields that are equal case-insensitively are passed to the
|
|
constructor or ``.update``, the behavior is undefined and some will be
|
|
lost.
|
|
|
|
>>> headers = HTTPHeaderDict()
|
|
>>> headers.add('Set-Cookie', 'foo=bar')
|
|
>>> headers.add('set-cookie', 'baz=quxx')
|
|
>>> headers['content-length'] = '7'
|
|
>>> headers['SET-cookie']
|
|
'foo=bar, baz=quxx'
|
|
>>> headers['Content-Length']
|
|
'7'
|
|
"""
|
|
|
|
_container: typing.MutableMapping[str, list[str]]
|
|
|
|
def __init__(self, headers: ValidHTTPHeaderSource | None = None, **kwargs: str):
|
|
super().__init__()
|
|
self._container = {} # 'dict' is insert-ordered in Python 3.7+
|
|
if headers is not None:
|
|
if isinstance(headers, HTTPHeaderDict):
|
|
self._copy_from(headers)
|
|
else:
|
|
self.extend(headers)
|
|
if kwargs:
|
|
self.extend(kwargs)
|
|
|
|
def __setitem__(self, key: str, val: str) -> None:
|
|
# avoid a bytes/str comparison by decoding before httplib
|
|
if isinstance(key, bytes):
|
|
key = key.decode("latin-1")
|
|
self._container[key.lower()] = [key, val]
|
|
|
|
def __getitem__(self, key: str) -> str:
|
|
val = self._container[key.lower()]
|
|
return ", ".join(val[1:])
|
|
|
|
def __delitem__(self, key: str) -> None:
|
|
del self._container[key.lower()]
|
|
|
|
def __contains__(self, key: object) -> bool:
|
|
if isinstance(key, str):
|
|
return key.lower() in self._container
|
|
return False
|
|
|
|
def setdefault(self, key: str, default: str = "") -> str:
|
|
return super().setdefault(key, default)
|
|
|
|
def __eq__(self, other: object) -> bool:
|
|
maybe_constructable = ensure_can_construct_http_header_dict(other)
|
|
if maybe_constructable is None:
|
|
return False
|
|
else:
|
|
other_as_http_header_dict = type(self)(maybe_constructable)
|
|
|
|
return {k.lower(): v for k, v in self.itermerged()} == {
|
|
k.lower(): v for k, v in other_as_http_header_dict.itermerged()
|
|
}
|
|
|
|
def __ne__(self, other: object) -> bool:
|
|
return not self.__eq__(other)
|
|
|
|
def __len__(self) -> int:
|
|
return len(self._container)
|
|
|
|
def __iter__(self) -> typing.Iterator[str]:
|
|
# Only provide the originally cased names
|
|
for vals in self._container.values():
|
|
yield vals[0]
|
|
|
|
def discard(self, key: str) -> None:
|
|
try:
|
|
del self[key]
|
|
except KeyError:
|
|
pass
|
|
|
|
def add(self, key: str, val: str, *, combine: bool = False) -> None:
|
|
"""Adds a (name, value) pair, doesn't overwrite the value if it already
|
|
exists.
|
|
|
|
If this is called with combine=True, instead of adding a new header value
|
|
as a distinct item during iteration, this will instead append the value to
|
|
any existing header value with a comma. If no existing header value exists
|
|
for the key, then the value will simply be added, ignoring the combine parameter.
|
|
|
|
>>> headers = HTTPHeaderDict(foo='bar')
|
|
>>> headers.add('Foo', 'baz')
|
|
>>> headers['foo']
|
|
'bar, baz'
|
|
>>> list(headers.items())
|
|
[('foo', 'bar'), ('foo', 'baz')]
|
|
>>> headers.add('foo', 'quz', combine=True)
|
|
>>> list(headers.items())
|
|
[('foo', 'bar, baz, quz')]
|
|
"""
|
|
# avoid a bytes/str comparison by decoding before httplib
|
|
if isinstance(key, bytes):
|
|
key = key.decode("latin-1")
|
|
key_lower = key.lower()
|
|
new_vals = [key, val]
|
|
# Keep the common case aka no item present as fast as possible
|
|
vals = self._container.setdefault(key_lower, new_vals)
|
|
if new_vals is not vals:
|
|
# if there are values here, then there is at least the initial
|
|
# key/value pair
|
|
assert len(vals) >= 2
|
|
if combine:
|
|
vals[-1] = vals[-1] + ", " + val
|
|
else:
|
|
vals.append(val)
|
|
|
|
def extend(self, *args: ValidHTTPHeaderSource, **kwargs: str) -> None:
|
|
"""Generic import function for any type of header-like object.
|
|
Adapted version of MutableMapping.update in order to insert items
|
|
with self.add instead of self.__setitem__
|
|
"""
|
|
if len(args) > 1:
|
|
raise TypeError(
|
|
f"extend() takes at most 1 positional arguments ({len(args)} given)"
|
|
)
|
|
other = args[0] if len(args) >= 1 else ()
|
|
|
|
if isinstance(other, HTTPHeaderDict):
|
|
for key, val in other.iteritems():
|
|
self.add(key, val)
|
|
elif isinstance(other, typing.Mapping):
|
|
for key, val in other.items():
|
|
self.add(key, val)
|
|
elif isinstance(other, typing.Iterable):
|
|
other = typing.cast(typing.Iterable[typing.Tuple[str, str]], other)
|
|
for key, value in other:
|
|
self.add(key, value)
|
|
elif hasattr(other, "keys") and hasattr(other, "__getitem__"):
|
|
# THIS IS NOT A TYPESAFE BRANCH
|
|
# In this branch, the object has a `keys` attr but is not a Mapping or any of
|
|
# the other types indicated in the method signature. We do some stuff with
|
|
# it as though it partially implements the Mapping interface, but we're not
|
|
# doing that stuff safely AT ALL.
|
|
for key in other.keys():
|
|
self.add(key, other[key])
|
|
|
|
for key, value in kwargs.items():
|
|
self.add(key, value)
|
|
|
|
@typing.overload
|
|
def getlist(self, key: str) -> list[str]:
|
|
...
|
|
|
|
@typing.overload
|
|
def getlist(self, key: str, default: _DT) -> list[str] | _DT:
|
|
...
|
|
|
|
def getlist(
|
|
self, key: str, default: _Sentinel | _DT = _Sentinel.not_passed
|
|
) -> list[str] | _DT:
|
|
"""Returns a list of all the values for the named field. Returns an
|
|
empty list if the key doesn't exist."""
|
|
try:
|
|
vals = self._container[key.lower()]
|
|
except KeyError:
|
|
if default is _Sentinel.not_passed:
|
|
# _DT is unbound; empty list is instance of List[str]
|
|
return []
|
|
# _DT is bound; default is instance of _DT
|
|
return default
|
|
else:
|
|
# _DT may or may not be bound; vals[1:] is instance of List[str], which
|
|
# meets our external interface requirement of `Union[List[str], _DT]`.
|
|
return vals[1:]
|
|
|
|
# Backwards compatibility for httplib
|
|
getheaders = getlist
|
|
getallmatchingheaders = getlist
|
|
iget = getlist
|
|
|
|
# Backwards compatibility for http.cookiejar
|
|
get_all = getlist
|
|
|
|
def __repr__(self) -> str:
|
|
return f"{type(self).__name__}({dict(self.itermerged())})"
|
|
|
|
def _copy_from(self, other: HTTPHeaderDict) -> None:
|
|
for key in other:
|
|
val = other.getlist(key)
|
|
self._container[key.lower()] = [key, *val]
|
|
|
|
def copy(self) -> HTTPHeaderDict:
|
|
clone = type(self)()
|
|
clone._copy_from(self)
|
|
return clone
|
|
|
|
def iteritems(self) -> typing.Iterator[tuple[str, str]]:
|
|
"""Iterate over all header lines, including duplicate ones."""
|
|
for key in self:
|
|
vals = self._container[key.lower()]
|
|
for val in vals[1:]:
|
|
yield vals[0], val
|
|
|
|
def itermerged(self) -> typing.Iterator[tuple[str, str]]:
|
|
"""Iterate over all headers, merging duplicate ones together."""
|
|
for key in self:
|
|
val = self._container[key.lower()]
|
|
yield val[0], ", ".join(val[1:])
|
|
|
|
def items(self) -> HTTPHeaderDictItemView: # type: ignore[override]
|
|
return HTTPHeaderDictItemView(self)
|
|
|
|
def _has_value_for_header(self, header_name: str, potential_value: str) -> bool:
|
|
if header_name in self:
|
|
return potential_value in self._container[header_name.lower()][1:]
|
|
return False
|
|
|
|
def __ior__(self, other: object) -> HTTPHeaderDict:
|
|
# Supports extending a header dict in-place using operator |=
|
|
# combining items with add instead of __setitem__
|
|
maybe_constructable = ensure_can_construct_http_header_dict(other)
|
|
if maybe_constructable is None:
|
|
return NotImplemented
|
|
self.extend(maybe_constructable)
|
|
return self
|
|
|
|
def __or__(self, other: object) -> HTTPHeaderDict:
|
|
# Supports merging header dicts using operator |
|
|
# combining items with add instead of __setitem__
|
|
maybe_constructable = ensure_can_construct_http_header_dict(other)
|
|
if maybe_constructable is None:
|
|
return NotImplemented
|
|
result = self.copy()
|
|
result.extend(maybe_constructable)
|
|
return result
|
|
|
|
def __ror__(self, other: object) -> HTTPHeaderDict:
|
|
# Supports merging header dicts using operator | when other is on left side
|
|
# combining items with add instead of __setitem__
|
|
maybe_constructable = ensure_can_construct_http_header_dict(other)
|
|
if maybe_constructable is None:
|
|
return NotImplemented
|
|
result = type(self)(maybe_constructable)
|
|
result.extend(self)
|
|
return result
|