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|
import socket
import ssl
from typing import Any, Optional
from ._connect import connect_tcp
from ._stream import SyncSocketStream
from .._resolver import SyncResolver
from ..._types import ProxyType
from ..._errors import ProxyConnectionError, ProxyTimeoutError, ProxyError
from ..._helpers import parse_proxy_url
from ..._protocols.errors import ReplyError
from ..._connectors.factory_sync import create_connector
DEFAULT_TIMEOUT = 60
class SyncProxy:
def __init__(
self,
proxy_type: ProxyType,
host: str,
port: int,
username: Optional[str] = None,
password: Optional[str] = None,
rdns: Optional[bool] = None,
proxy_ssl: Optional[ssl.SSLContext] = None,
forward: Optional['SyncProxy'] = None,
):
self._proxy_type = proxy_type
self._proxy_host = host
self._proxy_port = port
self._username = username
self._password = password
self._rdns = rdns
self._proxy_ssl = proxy_ssl
self._forward = forward
self._resolver = SyncResolver()
def connect(
self,
dest_host: str,
dest_port: int,
dest_ssl: Optional[ssl.SSLContext] = None,
timeout: Optional[float] = None,
**kwargs: Any,
) -> SyncSocketStream:
if timeout is None:
timeout = DEFAULT_TIMEOUT
if self._forward is None:
local_addr = kwargs.get('local_addr')
try:
stream = connect_tcp(
host=self._proxy_host,
port=self._proxy_port,
timeout=timeout,
local_addr=local_addr,
)
except OSError as e:
msg = 'Could not connect to proxy {}:{} [{}]'.format(
self._proxy_host,
self._proxy_port,
e.strerror,
)
raise ProxyConnectionError(e.errno, msg) from e
else:
stream = self._forward.connect(
dest_host=self._proxy_host,
dest_port=self._proxy_port,
timeout=timeout,
)
try:
if self._proxy_ssl is not None:
stream = stream.start_tls(
hostname=self._proxy_host,
ssl_context=self._proxy_ssl,
)
connector = create_connector(
proxy_type=self._proxy_type,
username=self._username,
password=self._password,
rdns=self._rdns,
resolver=self._resolver,
)
connector.connect(
stream=stream,
host=dest_host,
port=dest_port,
)
if dest_ssl is not None:
stream = stream.start_tls(
hostname=dest_host,
ssl_context=dest_ssl,
)
return stream
except socket.timeout as e:
stream.close()
raise ProxyTimeoutError(f'Proxy connection timed out: {timeout}') from e
except ReplyError as e:
stream.close()
raise ProxyError(e, error_code=e.error_code)
except Exception:
stream.close()
raise
@classmethod
def create(cls, *args, **kwargs): # for backward compatibility
return cls(*args, **kwargs)
@classmethod
def from_url(cls, url: str, **kwargs) -> 'SyncProxy':
url_args = parse_proxy_url(url)
return cls(*url_args, **kwargs)
|
