Untriex Programming
780
.venv/lib/python3.9/site-packages/aiohttp/helpers.py
Normal file
780
.venv/lib/python3.9/site-packages/aiohttp/helpers.py
Normal file
@@ -0,0 +1,780 @@
|
||||
"""Various helper functions"""
|
||||
|
||||
import asyncio
|
||||
import base64
|
||||
import binascii
|
||||
import cgi
|
||||
import datetime
|
||||
import functools
|
||||
import inspect
|
||||
import netrc
|
||||
import os
|
||||
import platform
|
||||
import re
|
||||
import sys
|
||||
import time
|
||||
import warnings
|
||||
import weakref
|
||||
from collections import namedtuple
|
||||
from contextlib import suppress
|
||||
from math import ceil
|
||||
from pathlib import Path
|
||||
from types import TracebackType
|
||||
from typing import (
|
||||
Any,
|
||||
Callable,
|
||||
Dict,
|
||||
Generator,
|
||||
Generic,
|
||||
Iterable,
|
||||
Iterator,
|
||||
List,
|
||||
Mapping,
|
||||
Optional,
|
||||
Pattern,
|
||||
Set,
|
||||
Tuple,
|
||||
Type,
|
||||
TypeVar,
|
||||
Union,
|
||||
cast,
|
||||
)
|
||||
from urllib.parse import quote
|
||||
from urllib.request import getproxies
|
||||
|
||||
import async_timeout
|
||||
import attr
|
||||
from multidict import MultiDict, MultiDictProxy
|
||||
from typing_extensions import Protocol
|
||||
from yarl import URL
|
||||
|
||||
from . import hdrs
|
||||
from .log import client_logger, internal_logger
|
||||
from .typedefs import PathLike # noqa
|
||||
|
||||
__all__ = ("BasicAuth", "ChainMapProxy")
|
||||
|
||||
PY_36 = sys.version_info >= (3, 6)
|
||||
PY_37 = sys.version_info >= (3, 7)
|
||||
PY_38 = sys.version_info >= (3, 8)
|
||||
|
||||
if not PY_37:
|
||||
import idna_ssl
|
||||
|
||||
idna_ssl.patch_match_hostname()
|
||||
|
||||
try:
|
||||
from typing import ContextManager
|
||||
except ImportError:
|
||||
from typing_extensions import ContextManager
|
||||
|
||||
|
||||
def all_tasks(
|
||||
loop: Optional[asyncio.AbstractEventLoop] = None,
|
||||
) -> Set["asyncio.Task[Any]"]:
|
||||
tasks = list(asyncio.Task.all_tasks(loop))
|
||||
return {t for t in tasks if not t.done()}
|
||||
|
||||
|
||||
if PY_37:
|
||||
all_tasks = getattr(asyncio, "all_tasks")
|
||||
|
||||
|
||||
_T = TypeVar("_T")
|
||||
_S = TypeVar("_S")
|
||||
|
||||
|
||||
sentinel = object() # type: Any
|
||||
NO_EXTENSIONS = bool(os.environ.get("AIOHTTP_NO_EXTENSIONS")) # type: bool
|
||||
|
||||
# N.B. sys.flags.dev_mode is available on Python 3.7+, use getattr
|
||||
# for compatibility with older versions
|
||||
DEBUG = getattr(sys.flags, "dev_mode", False) or (
|
||||
not sys.flags.ignore_environment and bool(os.environ.get("PYTHONASYNCIODEBUG"))
|
||||
) # type: bool
|
||||
|
||||
|
||||
CHAR = {chr(i) for i in range(0, 128)}
|
||||
CTL = {chr(i) for i in range(0, 32)} | {
|
||||
chr(127),
|
||||
}
|
||||
SEPARATORS = {
|
||||
"(",
|
||||
")",
|
||||
"<",
|
||||
">",
|
||||
"@",
|
||||
",",
|
||||
";",
|
||||
":",
|
||||
"\\",
|
||||
'"',
|
||||
"/",
|
||||
"[",
|
||||
"]",
|
||||
"?",
|
||||
"=",
|
||||
"{",
|
||||
"}",
|
||||
" ",
|
||||
chr(9),
|
||||
}
|
||||
TOKEN = CHAR ^ CTL ^ SEPARATORS
|
||||
|
||||
|
||||
class noop:
|
||||
def __await__(self) -> Generator[None, None, None]:
|
||||
yield
|
||||
|
||||
|
||||
class BasicAuth(namedtuple("BasicAuth", ["login", "password", "encoding"])):
|
||||
"""Http basic authentication helper."""
|
||||
|
||||
def __new__(
|
||||
cls, login: str, password: str = "", encoding: str = "latin1"
|
||||
) -> "BasicAuth":
|
||||
if login is None:
|
||||
raise ValueError("None is not allowed as login value")
|
||||
|
||||
if password is None:
|
||||
raise ValueError("None is not allowed as password value")
|
||||
|
||||
if ":" in login:
|
||||
raise ValueError('A ":" is not allowed in login (RFC 1945#section-11.1)')
|
||||
|
||||
return super().__new__(cls, login, password, encoding)
|
||||
|
||||
@classmethod
|
||||
def decode(cls, auth_header: str, encoding: str = "latin1") -> "BasicAuth":
|
||||
"""Create a BasicAuth object from an Authorization HTTP header."""
|
||||
try:
|
||||
auth_type, encoded_credentials = auth_header.split(" ", 1)
|
||||
except ValueError:
|
||||
raise ValueError("Could not parse authorization header.")
|
||||
|
||||
if auth_type.lower() != "basic":
|
||||
raise ValueError("Unknown authorization method %s" % auth_type)
|
||||
|
||||
try:
|
||||
decoded = base64.b64decode(
|
||||
encoded_credentials.encode("ascii"), validate=True
|
||||
).decode(encoding)
|
||||
except binascii.Error:
|
||||
raise ValueError("Invalid base64 encoding.")
|
||||
|
||||
try:
|
||||
# RFC 2617 HTTP Authentication
|
||||
# https://www.ietf.org/rfc/rfc2617.txt
|
||||
# the colon must be present, but the username and password may be
|
||||
# otherwise blank.
|
||||
username, password = decoded.split(":", 1)
|
||||
except ValueError:
|
||||
raise ValueError("Invalid credentials.")
|
||||
|
||||
return cls(username, password, encoding=encoding)
|
||||
|
||||
@classmethod
|
||||
def from_url(cls, url: URL, *, encoding: str = "latin1") -> Optional["BasicAuth"]:
|
||||
"""Create BasicAuth from url."""
|
||||
if not isinstance(url, URL):
|
||||
raise TypeError("url should be yarl.URL instance")
|
||||
if url.user is None:
|
||||
return None
|
||||
return cls(url.user, url.password or "", encoding=encoding)
|
||||
|
||||
def encode(self) -> str:
|
||||
"""Encode credentials."""
|
||||
creds = (f"{self.login}:{self.password}").encode(self.encoding)
|
||||
return "Basic %s" % base64.b64encode(creds).decode(self.encoding)
|
||||
|
||||
|
||||
def strip_auth_from_url(url: URL) -> Tuple[URL, Optional[BasicAuth]]:
|
||||
auth = BasicAuth.from_url(url)
|
||||
if auth is None:
|
||||
return url, None
|
||||
else:
|
||||
return url.with_user(None), auth
|
||||
|
||||
|
||||
def netrc_from_env() -> Optional[netrc.netrc]:
|
||||
"""Attempt to load the netrc file from the path specified by the env-var
|
||||
NETRC or in the default location in the user's home directory.
|
||||
|
||||
Returns None if it couldn't be found or fails to parse.
|
||||
"""
|
||||
netrc_env = os.environ.get("NETRC")
|
||||
|
||||
if netrc_env is not None:
|
||||
netrc_path = Path(netrc_env)
|
||||
else:
|
||||
try:
|
||||
home_dir = Path.home()
|
||||
except RuntimeError as e: # pragma: no cover
|
||||
# if pathlib can't resolve home, it may raise a RuntimeError
|
||||
client_logger.debug(
|
||||
"Could not resolve home directory when "
|
||||
"trying to look for .netrc file: %s",
|
||||
e,
|
||||
)
|
||||
return None
|
||||
|
||||
netrc_path = home_dir / (
|
||||
"_netrc" if platform.system() == "Windows" else ".netrc"
|
||||
)
|
||||
|
||||
try:
|
||||
return netrc.netrc(str(netrc_path))
|
||||
except netrc.NetrcParseError as e:
|
||||
client_logger.warning("Could not parse .netrc file: %s", e)
|
||||
except OSError as e:
|
||||
# we couldn't read the file (doesn't exist, permissions, etc.)
|
||||
if netrc_env or netrc_path.is_file():
|
||||
# only warn if the environment wanted us to load it,
|
||||
# or it appears like the default file does actually exist
|
||||
client_logger.warning("Could not read .netrc file: %s", e)
|
||||
|
||||
return None
|
||||
|
||||
|
||||
@attr.s(auto_attribs=True, frozen=True, slots=True)
|
||||
class ProxyInfo:
|
||||
proxy: URL
|
||||
proxy_auth: Optional[BasicAuth]
|
||||
|
||||
|
||||
def proxies_from_env() -> Dict[str, ProxyInfo]:
|
||||
proxy_urls = {k: URL(v) for k, v in getproxies().items() if k in ("http", "https")}
|
||||
netrc_obj = netrc_from_env()
|
||||
stripped = {k: strip_auth_from_url(v) for k, v in proxy_urls.items()}
|
||||
ret = {}
|
||||
for proto, val in stripped.items():
|
||||
proxy, auth = val
|
||||
if proxy.scheme == "https":
|
||||
client_logger.warning("HTTPS proxies %s are not supported, ignoring", proxy)
|
||||
continue
|
||||
if netrc_obj and auth is None:
|
||||
auth_from_netrc = None
|
||||
if proxy.host is not None:
|
||||
auth_from_netrc = netrc_obj.authenticators(proxy.host)
|
||||
if auth_from_netrc is not None:
|
||||
# auth_from_netrc is a (`user`, `account`, `password`) tuple,
|
||||
# `user` and `account` both can be username,
|
||||
# if `user` is None, use `account`
|
||||
*logins, password = auth_from_netrc
|
||||
login = logins[0] if logins[0] else logins[-1]
|
||||
auth = BasicAuth(cast(str, login), cast(str, password))
|
||||
ret[proto] = ProxyInfo(proxy, auth)
|
||||
return ret
|
||||
|
||||
|
||||
def current_task(
|
||||
loop: Optional[asyncio.AbstractEventLoop] = None,
|
||||
) -> "Optional[asyncio.Task[Any]]":
|
||||
if PY_37:
|
||||
return asyncio.current_task(loop=loop)
|
||||
else:
|
||||
return asyncio.Task.current_task(loop=loop)
|
||||
|
||||
|
||||
def get_running_loop(
|
||||
loop: Optional[asyncio.AbstractEventLoop] = None,
|
||||
) -> asyncio.AbstractEventLoop:
|
||||
if loop is None:
|
||||
loop = asyncio.get_event_loop()
|
||||
if not loop.is_running():
|
||||
warnings.warn(
|
||||
"The object should be created within an async function",
|
||||
DeprecationWarning,
|
||||
stacklevel=3,
|
||||
)
|
||||
if loop.get_debug():
|
||||
internal_logger.warning(
|
||||
"The object should be created within an async function", stack_info=True
|
||||
)
|
||||
return loop
|
||||
|
||||
|
||||
def isasyncgenfunction(obj: Any) -> bool:
|
||||
func = getattr(inspect, "isasyncgenfunction", None)
|
||||
if func is not None:
|
||||
return func(obj)
|
||||
else:
|
||||
return False
|
||||
|
||||
|
||||
@attr.s(auto_attribs=True, frozen=True, slots=True)
|
||||
class MimeType:
|
||||
type: str
|
||||
subtype: str
|
||||
suffix: str
|
||||
parameters: "MultiDictProxy[str]"
|
||||
|
||||
|
||||
@functools.lru_cache(maxsize=56)
|
||||
def parse_mimetype(mimetype: str) -> MimeType:
|
||||
"""Parses a MIME type into its components.
|
||||
|
||||
mimetype is a MIME type string.
|
||||
|
||||
Returns a MimeType object.
|
||||
|
||||
Example:
|
||||
|
||||
>>> parse_mimetype('text/html; charset=utf-8')
|
||||
MimeType(type='text', subtype='html', suffix='',
|
||||
parameters={'charset': 'utf-8'})
|
||||
|
||||
"""
|
||||
if not mimetype:
|
||||
return MimeType(
|
||||
type="", subtype="", suffix="", parameters=MultiDictProxy(MultiDict())
|
||||
)
|
||||
|
||||
parts = mimetype.split(";")
|
||||
params = MultiDict() # type: MultiDict[str]
|
||||
for item in parts[1:]:
|
||||
if not item:
|
||||
continue
|
||||
key, value = cast(
|
||||
Tuple[str, str], item.split("=", 1) if "=" in item else (item, "")
|
||||
)
|
||||
params.add(key.lower().strip(), value.strip(' "'))
|
||||
|
||||
fulltype = parts[0].strip().lower()
|
||||
if fulltype == "*":
|
||||
fulltype = "*/*"
|
||||
|
||||
mtype, stype = (
|
||||
cast(Tuple[str, str], fulltype.split("/", 1))
|
||||
if "/" in fulltype
|
||||
else (fulltype, "")
|
||||
)
|
||||
stype, suffix = (
|
||||
cast(Tuple[str, str], stype.split("+", 1)) if "+" in stype else (stype, "")
|
||||
)
|
||||
|
||||
return MimeType(
|
||||
type=mtype, subtype=stype, suffix=suffix, parameters=MultiDictProxy(params)
|
||||
)
|
||||
|
||||
|
||||
def guess_filename(obj: Any, default: Optional[str] = None) -> Optional[str]:
|
||||
name = getattr(obj, "name", None)
|
||||
if name and isinstance(name, str) and name[0] != "<" and name[-1] != ">":
|
||||
return Path(name).name
|
||||
return default
|
||||
|
||||
|
||||
def content_disposition_header(
|
||||
disptype: str, quote_fields: bool = True, **params: str
|
||||
) -> str:
|
||||
"""Sets ``Content-Disposition`` header.
|
||||
|
||||
disptype is a disposition type: inline, attachment, form-data.
|
||||
Should be valid extension token (see RFC 2183)
|
||||
|
||||
params is a dict with disposition params.
|
||||
"""
|
||||
if not disptype or not (TOKEN > set(disptype)):
|
||||
raise ValueError("bad content disposition type {!r}" "".format(disptype))
|
||||
|
||||
value = disptype
|
||||
if params:
|
||||
lparams = []
|
||||
for key, val in params.items():
|
||||
if not key or not (TOKEN > set(key)):
|
||||
raise ValueError(
|
||||
"bad content disposition parameter" " {!r}={!r}".format(key, val)
|
||||
)
|
||||
qval = quote(val, "") if quote_fields else val
|
||||
lparams.append((key, '"%s"' % qval))
|
||||
if key == "filename":
|
||||
lparams.append(("filename*", "utf-8''" + qval))
|
||||
sparams = "; ".join("=".join(pair) for pair in lparams)
|
||||
value = "; ".join((value, sparams))
|
||||
return value
|
||||
|
||||
|
||||
class _TSelf(Protocol):
|
||||
_cache: Dict[str, Any]
|
||||
|
||||
|
||||
class reify(Generic[_T]):
|
||||
"""Use as a class method decorator. It operates almost exactly like
|
||||
the Python `@property` decorator, but it puts the result of the
|
||||
method it decorates into the instance dict after the first call,
|
||||
effectively replacing the function it decorates with an instance
|
||||
variable. It is, in Python parlance, a data descriptor.
|
||||
|
||||
"""
|
||||
|
||||
def __init__(self, wrapped: Callable[..., _T]) -> None:
|
||||
self.wrapped = wrapped
|
||||
self.__doc__ = wrapped.__doc__
|
||||
self.name = wrapped.__name__
|
||||
|
||||
def __get__(self, inst: _TSelf, owner: Optional[Type[Any]] = None) -> _T:
|
||||
try:
|
||||
try:
|
||||
return inst._cache[self.name]
|
||||
except KeyError:
|
||||
val = self.wrapped(inst)
|
||||
inst._cache[self.name] = val
|
||||
return val
|
||||
except AttributeError:
|
||||
if inst is None:
|
||||
return self
|
||||
raise
|
||||
|
||||
def __set__(self, inst: _TSelf, value: _T) -> None:
|
||||
raise AttributeError("reified property is read-only")
|
||||
|
||||
|
||||
reify_py = reify
|
||||
|
||||
try:
|
||||
from ._helpers import reify as reify_c
|
||||
|
||||
if not NO_EXTENSIONS:
|
||||
reify = reify_c # type: ignore
|
||||
except ImportError:
|
||||
pass
|
||||
|
||||
_ipv4_pattern = (
|
||||
r"^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}"
|
||||
r"(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$"
|
||||
)
|
||||
_ipv6_pattern = (
|
||||
r"^(?:(?:(?:[A-F0-9]{1,4}:){6}|(?=(?:[A-F0-9]{0,4}:){0,6}"
|
||||
r"(?:[0-9]{1,3}\.){3}[0-9]{1,3}$)(([0-9A-F]{1,4}:){0,5}|:)"
|
||||
r"((:[0-9A-F]{1,4}){1,5}:|:)|::(?:[A-F0-9]{1,4}:){5})"
|
||||
r"(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])\.){3}"
|
||||
r"(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])|(?:[A-F0-9]{1,4}:){7}"
|
||||
r"[A-F0-9]{1,4}|(?=(?:[A-F0-9]{0,4}:){0,7}[A-F0-9]{0,4}$)"
|
||||
r"(([0-9A-F]{1,4}:){1,7}|:)((:[0-9A-F]{1,4}){1,7}|:)|(?:[A-F0-9]{1,4}:){7}"
|
||||
r":|:(:[A-F0-9]{1,4}){7})$"
|
||||
)
|
||||
_ipv4_regex = re.compile(_ipv4_pattern)
|
||||
_ipv6_regex = re.compile(_ipv6_pattern, flags=re.IGNORECASE)
|
||||
_ipv4_regexb = re.compile(_ipv4_pattern.encode("ascii"))
|
||||
_ipv6_regexb = re.compile(_ipv6_pattern.encode("ascii"), flags=re.IGNORECASE)
|
||||
|
||||
|
||||
def _is_ip_address(
|
||||
regex: Pattern[str], regexb: Pattern[bytes], host: Optional[Union[str, bytes]]
|
||||
) -> bool:
|
||||
if host is None:
|
||||
return False
|
||||
if isinstance(host, str):
|
||||
return bool(regex.match(host))
|
||||
elif isinstance(host, (bytes, bytearray, memoryview)):
|
||||
return bool(regexb.match(host))
|
||||
else:
|
||||
raise TypeError("{} [{}] is not a str or bytes".format(host, type(host)))
|
||||
|
||||
|
||||
is_ipv4_address = functools.partial(_is_ip_address, _ipv4_regex, _ipv4_regexb)
|
||||
is_ipv6_address = functools.partial(_is_ip_address, _ipv6_regex, _ipv6_regexb)
|
||||
|
||||
|
||||
def is_ip_address(host: Optional[Union[str, bytes, bytearray, memoryview]]) -> bool:
|
||||
return is_ipv4_address(host) or is_ipv6_address(host)
|
||||
|
||||
|
||||
def next_whole_second() -> datetime.datetime:
|
||||
"""Return current time rounded up to the next whole second."""
|
||||
return datetime.datetime.now(datetime.timezone.utc).replace(
|
||||
microsecond=0
|
||||
) + datetime.timedelta(seconds=0)
|
||||
|
||||
|
||||
_cached_current_datetime = None # type: Optional[int]
|
||||
_cached_formatted_datetime = ""
|
||||
|
||||
|
||||
def rfc822_formatted_time() -> str:
|
||||
global _cached_current_datetime
|
||||
global _cached_formatted_datetime
|
||||
|
||||
now = int(time.time())
|
||||
if now != _cached_current_datetime:
|
||||
# Weekday and month names for HTTP date/time formatting;
|
||||
# always English!
|
||||
# Tuples are constants stored in codeobject!
|
||||
_weekdayname = ("Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun")
|
||||
_monthname = (
|
||||
"", # Dummy so we can use 1-based month numbers
|
||||
"Jan",
|
||||
"Feb",
|
||||
"Mar",
|
||||
"Apr",
|
||||
"May",
|
||||
"Jun",
|
||||
"Jul",
|
||||
"Aug",
|
||||
"Sep",
|
||||
"Oct",
|
||||
"Nov",
|
||||
"Dec",
|
||||
)
|
||||
|
||||
year, month, day, hh, mm, ss, wd, *tail = time.gmtime(now)
|
||||
_cached_formatted_datetime = "%s, %02d %3s %4d %02d:%02d:%02d GMT" % (
|
||||
_weekdayname[wd],
|
||||
day,
|
||||
_monthname[month],
|
||||
year,
|
||||
hh,
|
||||
mm,
|
||||
ss,
|
||||
)
|
||||
_cached_current_datetime = now
|
||||
return _cached_formatted_datetime
|
||||
|
||||
|
||||
def _weakref_handle(info): # type: ignore
|
||||
ref, name = info
|
||||
ob = ref()
|
||||
if ob is not None:
|
||||
with suppress(Exception):
|
||||
getattr(ob, name)()
|
||||
|
||||
|
||||
def weakref_handle(ob, name, timeout, loop): # type: ignore
|
||||
if timeout is not None and timeout > 0:
|
||||
when = loop.time() + timeout
|
||||
if timeout >= 5:
|
||||
when = ceil(when)
|
||||
|
||||
return loop.call_at(when, _weakref_handle, (weakref.ref(ob), name))
|
||||
|
||||
|
||||
def call_later(cb, timeout, loop): # type: ignore
|
||||
if timeout is not None and timeout > 0:
|
||||
when = loop.time() + timeout
|
||||
if timeout > 5:
|
||||
when = ceil(when)
|
||||
return loop.call_at(when, cb)
|
||||
|
||||
|
||||
class TimeoutHandle:
|
||||
""" Timeout handle """
|
||||
|
||||
def __init__(
|
||||
self, loop: asyncio.AbstractEventLoop, timeout: Optional[float]
|
||||
) -> None:
|
||||
self._timeout = timeout
|
||||
self._loop = loop
|
||||
self._callbacks = (
|
||||
[]
|
||||
) # type: List[Tuple[Callable[..., None], Tuple[Any, ...], Dict[str, Any]]]
|
||||
|
||||
def register(
|
||||
self, callback: Callable[..., None], *args: Any, **kwargs: Any
|
||||
) -> None:
|
||||
self._callbacks.append((callback, args, kwargs))
|
||||
|
||||
def close(self) -> None:
|
||||
self._callbacks.clear()
|
||||
|
||||
def start(self) -> Optional[asyncio.Handle]:
|
||||
timeout = self._timeout
|
||||
if timeout is not None and timeout > 0:
|
||||
when = self._loop.time() + timeout
|
||||
if timeout >= 5:
|
||||
when = ceil(when)
|
||||
return self._loop.call_at(when, self.__call__)
|
||||
else:
|
||||
return None
|
||||
|
||||
def timer(self) -> "BaseTimerContext":
|
||||
if self._timeout is not None and self._timeout > 0:
|
||||
timer = TimerContext(self._loop)
|
||||
self.register(timer.timeout)
|
||||
return timer
|
||||
else:
|
||||
return TimerNoop()
|
||||
|
||||
def __call__(self) -> None:
|
||||
for cb, args, kwargs in self._callbacks:
|
||||
with suppress(Exception):
|
||||
cb(*args, **kwargs)
|
||||
|
||||
self._callbacks.clear()
|
||||
|
||||
|
||||
class BaseTimerContext(ContextManager["BaseTimerContext"]):
|
||||
pass
|
||||
|
||||
|
||||
class TimerNoop(BaseTimerContext):
|
||||
def __enter__(self) -> BaseTimerContext:
|
||||
return self
|
||||
|
||||
def __exit__(
|
||||
self,
|
||||
exc_type: Optional[Type[BaseException]],
|
||||
exc_val: Optional[BaseException],
|
||||
exc_tb: Optional[TracebackType],
|
||||
) -> None:
|
||||
return
|
||||
|
||||
|
||||
class TimerContext(BaseTimerContext):
|
||||
""" Low resolution timeout context manager """
|
||||
|
||||
def __init__(self, loop: asyncio.AbstractEventLoop) -> None:
|
||||
self._loop = loop
|
||||
self._tasks = [] # type: List[asyncio.Task[Any]]
|
||||
self._cancelled = False
|
||||
|
||||
def __enter__(self) -> BaseTimerContext:
|
||||
task = current_task(loop=self._loop)
|
||||
|
||||
if task is None:
|
||||
raise RuntimeError(
|
||||
"Timeout context manager should be used " "inside a task"
|
||||
)
|
||||
|
||||
if self._cancelled:
|
||||
task.cancel()
|
||||
raise asyncio.TimeoutError from None
|
||||
|
||||
self._tasks.append(task)
|
||||
return self
|
||||
|
||||
def __exit__(
|
||||
self,
|
||||
exc_type: Optional[Type[BaseException]],
|
||||
exc_val: Optional[BaseException],
|
||||
exc_tb: Optional[TracebackType],
|
||||
) -> Optional[bool]:
|
||||
if self._tasks:
|
||||
self._tasks.pop()
|
||||
|
||||
if exc_type is asyncio.CancelledError and self._cancelled:
|
||||
raise asyncio.TimeoutError from None
|
||||
return None
|
||||
|
||||
def timeout(self) -> None:
|
||||
if not self._cancelled:
|
||||
for task in set(self._tasks):
|
||||
task.cancel()
|
||||
|
||||
self._cancelled = True
|
||||
|
||||
|
||||
class CeilTimeout(async_timeout.timeout):
|
||||
def __enter__(self) -> async_timeout.timeout:
|
||||
if self._timeout is not None:
|
||||
self._task = current_task(loop=self._loop)
|
||||
if self._task is None:
|
||||
raise RuntimeError(
|
||||
"Timeout context manager should be used inside a task"
|
||||
)
|
||||
now = self._loop.time()
|
||||
delay = self._timeout
|
||||
when = now + delay
|
||||
if delay > 5:
|
||||
when = ceil(when)
|
||||
self._cancel_handler = self._loop.call_at(when, self._cancel_task)
|
||||
return self
|
||||
|
||||
|
||||
class HeadersMixin:
|
||||
|
||||
ATTRS = frozenset(["_content_type", "_content_dict", "_stored_content_type"])
|
||||
|
||||
_content_type = None # type: Optional[str]
|
||||
_content_dict = None # type: Optional[Dict[str, str]]
|
||||
_stored_content_type = sentinel
|
||||
|
||||
def _parse_content_type(self, raw: str) -> None:
|
||||
self._stored_content_type = raw
|
||||
if raw is None:
|
||||
# default value according to RFC 2616
|
||||
self._content_type = "application/octet-stream"
|
||||
self._content_dict = {}
|
||||
else:
|
||||
self._content_type, self._content_dict = cgi.parse_header(raw)
|
||||
|
||||
@property
|
||||
def content_type(self) -> str:
|
||||
"""The value of content part for Content-Type HTTP header."""
|
||||
raw = self._headers.get(hdrs.CONTENT_TYPE) # type: ignore
|
||||
if self._stored_content_type != raw:
|
||||
self._parse_content_type(raw)
|
||||
return self._content_type # type: ignore
|
||||
|
||||
@property
|
||||
def charset(self) -> Optional[str]:
|
||||
"""The value of charset part for Content-Type HTTP header."""
|
||||
raw = self._headers.get(hdrs.CONTENT_TYPE) # type: ignore
|
||||
if self._stored_content_type != raw:
|
||||
self._parse_content_type(raw)
|
||||
return self._content_dict.get("charset") # type: ignore
|
||||
|
||||
@property
|
||||
def content_length(self) -> Optional[int]:
|
||||
"""The value of Content-Length HTTP header."""
|
||||
content_length = self._headers.get(hdrs.CONTENT_LENGTH) # type: ignore
|
||||
|
||||
if content_length is not None:
|
||||
return int(content_length)
|
||||
else:
|
||||
return None
|
||||
|
||||
|
||||
def set_result(fut: "asyncio.Future[_T]", result: _T) -> None:
|
||||
if not fut.done():
|
||||
fut.set_result(result)
|
||||
|
||||
|
||||
def set_exception(fut: "asyncio.Future[_T]", exc: BaseException) -> None:
|
||||
if not fut.done():
|
||||
fut.set_exception(exc)
|
||||
|
||||
|
||||
class ChainMapProxy(Mapping[str, Any]):
|
||||
__slots__ = ("_maps",)
|
||||
|
||||
def __init__(self, maps: Iterable[Mapping[str, Any]]) -> None:
|
||||
self._maps = tuple(maps)
|
||||
|
||||
def __init_subclass__(cls) -> None:
|
||||
raise TypeError(
|
||||
"Inheritance class {} from ChainMapProxy "
|
||||
"is forbidden".format(cls.__name__)
|
||||
)
|
||||
|
||||
def __getitem__(self, key: str) -> Any:
|
||||
for mapping in self._maps:
|
||||
try:
|
||||
return mapping[key]
|
||||
except KeyError:
|
||||
pass
|
||||
raise KeyError(key)
|
||||
|
||||
def get(self, key: str, default: Any = None) -> Any:
|
||||
return self[key] if key in self else default
|
||||
|
||||
def __len__(self) -> int:
|
||||
# reuses stored hash values if possible
|
||||
return len(set().union(*self._maps)) # type: ignore
|
||||
|
||||
def __iter__(self) -> Iterator[str]:
|
||||
d = {} # type: Dict[str, Any]
|
||||
for mapping in reversed(self._maps):
|
||||
# reuses stored hash values if possible
|
||||
d.update(mapping)
|
||||
return iter(d)
|
||||
|
||||
def __contains__(self, key: object) -> bool:
|
||||
return any(key in m for m in self._maps)
|
||||
|
||||
def __bool__(self) -> bool:
|
||||
return any(self._maps)
|
||||
|
||||
def __repr__(self) -> str:
|
||||
content = ", ".join(map(repr, self._maps))
|
||||
return f"ChainMapProxy({content})"
|
||||
Reference in New Issue
Block a user