mirror of https://github.com/morpheus65535/bazarr
337 lines
12 KiB
Python
337 lines
12 KiB
Python
"""
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_http.py
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websocket - WebSocket client library for Python
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Copyright 2022 engn33r
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import errno
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import os
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import socket
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import sys
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from ._exceptions import *
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from ._logging import *
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from ._socket import *
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from ._ssl_compat import *
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from ._url import *
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from base64 import encodebytes as base64encode
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__all__ = ["proxy_info", "connect", "read_headers"]
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try:
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from python_socks.sync import Proxy
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from python_socks._errors import *
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from python_socks._types import ProxyType
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HAVE_PYTHON_SOCKS = True
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except:
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HAVE_PYTHON_SOCKS = False
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class ProxyError(Exception):
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pass
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class ProxyTimeoutError(Exception):
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pass
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class ProxyConnectionError(Exception):
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pass
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class proxy_info:
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def __init__(self, **options):
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self.proxy_host = options.get("http_proxy_host", None)
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if self.proxy_host:
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self.proxy_port = options.get("http_proxy_port", 0)
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self.auth = options.get("http_proxy_auth", None)
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self.no_proxy = options.get("http_no_proxy", None)
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self.proxy_protocol = options.get("proxy_type", "http")
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# Note: If timeout not specified, default python-socks timeout is 60 seconds
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self.proxy_timeout = options.get("http_proxy_timeout", None)
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if self.proxy_protocol not in ['http', 'socks4', 'socks4a', 'socks5', 'socks5h']:
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raise ProxyError("Only http, socks4, socks5 proxy protocols are supported")
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else:
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self.proxy_port = 0
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self.auth = None
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self.no_proxy = None
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self.proxy_protocol = "http"
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def _start_proxied_socket(url, options, proxy):
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if not HAVE_PYTHON_SOCKS:
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raise WebSocketException("Python Socks is needed for SOCKS proxying but is not available")
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hostname, port, resource, is_secure = parse_url(url)
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if proxy.proxy_protocol == "socks5":
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rdns = False
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proxy_type = ProxyType.SOCKS5
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if proxy.proxy_protocol == "socks4":
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rdns = False
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proxy_type = ProxyType.SOCKS4
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# socks5h and socks4a send DNS through proxy
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if proxy.proxy_protocol == "socks5h":
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rdns = True
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proxy_type = ProxyType.SOCKS5
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if proxy.proxy_protocol == "socks4a":
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rdns = True
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proxy_type = ProxyType.SOCKS4
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ws_proxy = Proxy.create(
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proxy_type=proxy_type,
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host=proxy.proxy_host,
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port=int(proxy.proxy_port),
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username=proxy.auth[0] if proxy.auth else None,
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password=proxy.auth[1] if proxy.auth else None,
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rdns=rdns)
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sock = ws_proxy.connect(hostname, port, timeout=proxy.proxy_timeout)
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if is_secure and HAVE_SSL:
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sock = _ssl_socket(sock, options.sslopt, hostname)
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elif is_secure:
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raise WebSocketException("SSL not available.")
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return sock, (hostname, port, resource)
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def connect(url, options, proxy, socket):
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# Use _start_proxied_socket() only for socks4 or socks5 proxy
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# Use _tunnel() for http proxy
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# TODO: Use python-socks for http protocol also, to standardize flow
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if proxy.proxy_host and not socket and not (proxy.proxy_protocol == "http"):
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return _start_proxied_socket(url, options, proxy)
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hostname, port_from_url, resource, is_secure = parse_url(url)
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if socket:
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return socket, (hostname, port_from_url, resource)
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addrinfo_list, need_tunnel, auth = _get_addrinfo_list(
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hostname, port_from_url, is_secure, proxy)
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if not addrinfo_list:
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raise WebSocketException(
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"Host not found.: " + hostname + ":" + str(port_from_url))
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sock = None
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try:
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sock = _open_socket(addrinfo_list, options.sockopt, options.timeout)
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if need_tunnel:
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sock = _tunnel(sock, hostname, port_from_url, auth)
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if is_secure:
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if HAVE_SSL:
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sock = _ssl_socket(sock, options.sslopt, hostname)
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else:
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raise WebSocketException("SSL not available.")
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return sock, (hostname, port_from_url, resource)
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except:
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if sock:
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sock.close()
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raise
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def _get_addrinfo_list(hostname, port, is_secure, proxy):
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phost, pport, pauth = get_proxy_info(
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hostname, is_secure, proxy.proxy_host, proxy.proxy_port, proxy.auth, proxy.no_proxy)
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try:
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# when running on windows 10, getaddrinfo without socktype returns a socktype 0.
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# This generates an error exception: `_on_error: exception Socket type must be stream or datagram, not 0`
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# or `OSError: [Errno 22] Invalid argument` when creating socket. Force the socket type to SOCK_STREAM.
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if not phost:
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addrinfo_list = socket.getaddrinfo(
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hostname, port, 0, socket.SOCK_STREAM, socket.SOL_TCP)
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return addrinfo_list, False, None
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else:
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pport = pport and pport or 80
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# when running on windows 10, the getaddrinfo used above
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# returns a socktype 0. This generates an error exception:
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# _on_error: exception Socket type must be stream or datagram, not 0
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# Force the socket type to SOCK_STREAM
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addrinfo_list = socket.getaddrinfo(phost, pport, 0, socket.SOCK_STREAM, socket.SOL_TCP)
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return addrinfo_list, True, pauth
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except socket.gaierror as e:
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raise WebSocketAddressException(e)
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def _open_socket(addrinfo_list, sockopt, timeout):
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err = None
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for addrinfo in addrinfo_list:
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family, socktype, proto = addrinfo[:3]
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sock = socket.socket(family, socktype, proto)
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sock.settimeout(timeout)
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for opts in DEFAULT_SOCKET_OPTION:
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sock.setsockopt(*opts)
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for opts in sockopt:
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sock.setsockopt(*opts)
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address = addrinfo[4]
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err = None
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while not err:
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try:
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sock.connect(address)
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except socket.error as error:
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sock.close()
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error.remote_ip = str(address[0])
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try:
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eConnRefused = (errno.ECONNREFUSED, errno.WSAECONNREFUSED, errno.ENETUNREACH)
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except AttributeError:
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eConnRefused = (errno.ECONNREFUSED, errno.ENETUNREACH)
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if error.errno in eConnRefused:
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err = error
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continue
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else:
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raise error
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else:
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break
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else:
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continue
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break
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else:
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if err:
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raise err
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return sock
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def _wrap_sni_socket(sock, sslopt, hostname, check_hostname):
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context = sslopt.get('context', None)
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if not context:
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context = ssl.SSLContext(sslopt.get('ssl_version', ssl.PROTOCOL_TLS_CLIENT))
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if sslopt.get('cert_reqs', ssl.CERT_NONE) != ssl.CERT_NONE:
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cafile = sslopt.get('ca_certs', None)
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capath = sslopt.get('ca_cert_path', None)
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if cafile or capath:
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context.load_verify_locations(cafile=cafile, capath=capath)
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elif hasattr(context, 'load_default_certs'):
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context.load_default_certs(ssl.Purpose.SERVER_AUTH)
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if sslopt.get('certfile', None):
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context.load_cert_chain(
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sslopt['certfile'],
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sslopt.get('keyfile', None),
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sslopt.get('password', None),
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)
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# Python 3.10 switch to PROTOCOL_TLS_CLIENT defaults to "cert_reqs = ssl.CERT_REQUIRED" and "check_hostname = True"
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# If both disabled, set check_hostname before verify_mode
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# see https://github.com/liris/websocket-client/commit/b96a2e8fa765753e82eea531adb19716b52ca3ca#commitcomment-10803153
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if sslopt.get('cert_reqs', ssl.CERT_NONE) == ssl.CERT_NONE and not sslopt.get('check_hostname', False):
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context.check_hostname = False
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context.verify_mode = ssl.CERT_NONE
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else:
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context.check_hostname = sslopt.get('check_hostname', True)
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context.verify_mode = sslopt.get('cert_reqs', ssl.CERT_REQUIRED)
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if 'ciphers' in sslopt:
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context.set_ciphers(sslopt['ciphers'])
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if 'cert_chain' in sslopt:
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certfile, keyfile, password = sslopt['cert_chain']
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context.load_cert_chain(certfile, keyfile, password)
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if 'ecdh_curve' in sslopt:
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context.set_ecdh_curve(sslopt['ecdh_curve'])
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return context.wrap_socket(
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sock,
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do_handshake_on_connect=sslopt.get('do_handshake_on_connect', True),
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suppress_ragged_eofs=sslopt.get('suppress_ragged_eofs', True),
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server_hostname=hostname,
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)
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def _ssl_socket(sock, user_sslopt, hostname):
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sslopt = dict(cert_reqs=ssl.CERT_REQUIRED)
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sslopt.update(user_sslopt)
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certPath = os.environ.get('WEBSOCKET_CLIENT_CA_BUNDLE')
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if certPath and os.path.isfile(certPath) \
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and user_sslopt.get('ca_certs', None) is None:
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sslopt['ca_certs'] = certPath
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elif certPath and os.path.isdir(certPath) \
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and user_sslopt.get('ca_cert_path', None) is None:
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sslopt['ca_cert_path'] = certPath
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if sslopt.get('server_hostname', None):
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hostname = sslopt['server_hostname']
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check_hostname = sslopt.get('check_hostname', True)
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sock = _wrap_sni_socket(sock, sslopt, hostname, check_hostname)
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return sock
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def _tunnel(sock, host, port, auth):
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debug("Connecting proxy...")
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connect_header = "CONNECT %s:%d HTTP/1.1\r\n" % (host, port)
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connect_header += "Host: %s:%d\r\n" % (host, port)
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# TODO: support digest auth.
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if auth and auth[0]:
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auth_str = auth[0]
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if auth[1]:
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auth_str += ":" + auth[1]
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encoded_str = base64encode(auth_str.encode()).strip().decode().replace('\n', '')
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connect_header += "Proxy-Authorization: Basic %s\r\n" % encoded_str
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connect_header += "\r\n"
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dump("request header", connect_header)
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send(sock, connect_header)
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try:
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status, resp_headers, status_message = read_headers(sock)
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except Exception as e:
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raise WebSocketProxyException(str(e))
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if status != 200:
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raise WebSocketProxyException(
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"failed CONNECT via proxy status: %r" % status)
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return sock
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def read_headers(sock):
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status = None
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status_message = None
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headers = {}
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trace("--- response header ---")
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while True:
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line = recv_line(sock)
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line = line.decode('utf-8').strip()
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if not line:
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break
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trace(line)
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if not status:
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status_info = line.split(" ", 2)
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status = int(status_info[1])
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if len(status_info) > 2:
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status_message = status_info[2]
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else:
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kv = line.split(":", 1)
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if len(kv) == 2:
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key, value = kv
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if key.lower() == "set-cookie" and headers.get("set-cookie"):
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headers["set-cookie"] = headers.get("set-cookie") + "; " + value.strip()
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else:
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headers[key.lower()] = value.strip()
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else:
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raise WebSocketException("Invalid header")
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trace("-----------------------")
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return status, headers, status_message
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