mirror of
https://github.com/SickGear/SickGear.git
synced 2024-12-22 10:43:38 +00:00
137 lines
4.4 KiB
Python
137 lines
4.4 KiB
Python
from __future__ import annotations
|
|
|
|
import socket
|
|
import typing
|
|
|
|
from ..exceptions import LocationParseError
|
|
from .timeout import _DEFAULT_TIMEOUT, _TYPE_TIMEOUT
|
|
|
|
_TYPE_SOCKET_OPTIONS = typing.Sequence[typing.Tuple[int, int, typing.Union[int, bytes]]]
|
|
|
|
if typing.TYPE_CHECKING:
|
|
from .._base_connection import BaseHTTPConnection
|
|
|
|
|
|
def is_connection_dropped(conn: BaseHTTPConnection) -> bool: # Platform-specific
|
|
"""
|
|
Returns True if the connection is dropped and should be closed.
|
|
:param conn: :class:`urllib3.connection.HTTPConnection` object.
|
|
"""
|
|
return not conn.is_connected
|
|
|
|
|
|
# This function is copied from socket.py in the Python 2.7 standard
|
|
# library test suite. Added to its signature is only `socket_options`.
|
|
# One additional modification is that we avoid binding to IPv6 servers
|
|
# discovered in DNS if the system doesn't have IPv6 functionality.
|
|
def create_connection(
|
|
address: tuple[str, int],
|
|
timeout: _TYPE_TIMEOUT = _DEFAULT_TIMEOUT,
|
|
source_address: tuple[str, int] | None = None,
|
|
socket_options: _TYPE_SOCKET_OPTIONS | None = None,
|
|
) -> socket.socket:
|
|
"""Connect to *address* and return the socket object.
|
|
|
|
Convenience function. Connect to *address* (a 2-tuple ``(host,
|
|
port)``) and return the socket object. Passing the optional
|
|
*timeout* parameter will set the timeout on the socket instance
|
|
before attempting to connect. If no *timeout* is supplied, the
|
|
global default timeout setting returned by :func:`socket.getdefaulttimeout`
|
|
is used. If *source_address* is set it must be a tuple of (host, port)
|
|
for the socket to bind as a source address before making the connection.
|
|
An host of '' or port 0 tells the OS to use the default.
|
|
"""
|
|
|
|
host, port = address
|
|
if host.startswith("["):
|
|
host = host.strip("[]")
|
|
err = None
|
|
|
|
# Using the value from allowed_gai_family() in the context of getaddrinfo lets
|
|
# us select whether to work with IPv4 DNS records, IPv6 records, or both.
|
|
# The original create_connection function always returns all records.
|
|
family = allowed_gai_family()
|
|
|
|
try:
|
|
host.encode("idna")
|
|
except UnicodeError:
|
|
raise LocationParseError(f"'{host}', label empty or too long") from None
|
|
|
|
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
|
|
af, socktype, proto, canonname, sa = res
|
|
sock = None
|
|
try:
|
|
sock = socket.socket(af, socktype, proto)
|
|
|
|
# If provided, set socket level options before connecting.
|
|
_set_socket_options(sock, socket_options)
|
|
|
|
if timeout is not _DEFAULT_TIMEOUT:
|
|
sock.settimeout(timeout)
|
|
if source_address:
|
|
sock.bind(source_address)
|
|
sock.connect(sa)
|
|
# Break explicitly a reference cycle
|
|
err = None
|
|
return sock
|
|
|
|
except OSError as _:
|
|
err = _
|
|
if sock is not None:
|
|
sock.close()
|
|
|
|
if err is not None:
|
|
try:
|
|
raise err
|
|
finally:
|
|
# Break explicitly a reference cycle
|
|
err = None
|
|
else:
|
|
raise OSError("getaddrinfo returns an empty list")
|
|
|
|
|
|
def _set_socket_options(
|
|
sock: socket.socket, options: _TYPE_SOCKET_OPTIONS | None
|
|
) -> None:
|
|
if options is None:
|
|
return
|
|
|
|
for opt in options:
|
|
sock.setsockopt(*opt)
|
|
|
|
|
|
def allowed_gai_family() -> socket.AddressFamily:
|
|
"""This function is designed to work in the context of
|
|
getaddrinfo, where family=socket.AF_UNSPEC is the default and
|
|
will perform a DNS search for both IPv6 and IPv4 records."""
|
|
|
|
family = socket.AF_INET
|
|
if HAS_IPV6:
|
|
family = socket.AF_UNSPEC
|
|
return family
|
|
|
|
|
|
def _has_ipv6(host: str) -> bool:
|
|
"""Returns True if the system can bind an IPv6 address."""
|
|
sock = None
|
|
has_ipv6 = False
|
|
|
|
if socket.has_ipv6:
|
|
# has_ipv6 returns true if cPython was compiled with IPv6 support.
|
|
# It does not tell us if the system has IPv6 support enabled. To
|
|
# determine that we must bind to an IPv6 address.
|
|
# https://github.com/urllib3/urllib3/pull/611
|
|
# https://bugs.python.org/issue658327
|
|
try:
|
|
sock = socket.socket(socket.AF_INET6)
|
|
sock.bind((host, 0))
|
|
has_ipv6 = True
|
|
except Exception:
|
|
pass
|
|
|
|
if sock:
|
|
sock.close()
|
|
return has_ipv6
|
|
|
|
|
|
HAS_IPV6 = _has_ipv6("::1")
|