321 lines
11 KiB
Python
321 lines
11 KiB
Python
"""
|
|
websocket - WebSocket client library for Python
|
|
|
|
Copyright (C) 2010 Hiroki Ohtani(liris)
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
"""
|
|
import errno
|
|
import os
|
|
import socket
|
|
import sys
|
|
|
|
from ._exceptions import *
|
|
from ._logging import *
|
|
from ._socket import*
|
|
from ._ssl_compat import *
|
|
from ._url import *
|
|
|
|
from base64 import encodebytes as base64encode
|
|
|
|
__all__ = ["proxy_info", "connect", "read_headers"]
|
|
|
|
try:
|
|
import socks
|
|
ProxyConnectionError = socks.ProxyConnectionError
|
|
HAS_PYSOCKS = True
|
|
except:
|
|
class ProxyConnectionError(BaseException):
|
|
pass
|
|
HAS_PYSOCKS = False
|
|
|
|
|
|
class proxy_info(object):
|
|
|
|
def __init__(self, **options):
|
|
self.type = options.get("proxy_type") or "http"
|
|
if not(self.type in ['http', 'socks4', 'socks5', 'socks5h']):
|
|
raise ValueError("proxy_type must be 'http', 'socks4', 'socks5' or 'socks5h'")
|
|
self.host = options.get("http_proxy_host", None)
|
|
if self.host:
|
|
self.port = options.get("http_proxy_port", 0)
|
|
self.auth = options.get("http_proxy_auth", None)
|
|
self.no_proxy = options.get("http_no_proxy", None)
|
|
else:
|
|
self.port = 0
|
|
self.auth = None
|
|
self.no_proxy = None
|
|
|
|
|
|
def _open_proxied_socket(url, options, proxy):
|
|
hostname, port, resource, is_secure = parse_url(url)
|
|
|
|
if not HAS_PYSOCKS:
|
|
raise WebSocketException("PySocks module not found.")
|
|
|
|
ptype = socks.SOCKS5
|
|
rdns = False
|
|
if proxy.type == "socks4":
|
|
ptype = socks.SOCKS4
|
|
if proxy.type == "http":
|
|
ptype = socks.HTTP
|
|
if proxy.type[-1] == "h":
|
|
rdns = True
|
|
|
|
sock = socks.create_connection(
|
|
(hostname, port),
|
|
proxy_type=ptype,
|
|
proxy_addr=proxy.host,
|
|
proxy_port=proxy.port,
|
|
proxy_rdns=rdns,
|
|
proxy_username=proxy.auth[0] if proxy.auth else None,
|
|
proxy_password=proxy.auth[1] if proxy.auth else None,
|
|
timeout=options.timeout,
|
|
socket_options=DEFAULT_SOCKET_OPTION + options.sockopt
|
|
)
|
|
|
|
if is_secure and HAVE_SSL:
|
|
sock = _ssl_socket(sock, options.sslopt, hostname)
|
|
elif is_secure:
|
|
raise WebSocketException("SSL not available.")
|
|
|
|
return sock, (hostname, port, resource)
|
|
|
|
|
|
def connect(url, options, proxy, socket):
|
|
if proxy.host and not socket and not (proxy.type == 'http'):
|
|
return _open_proxied_socket(url, options, proxy)
|
|
|
|
hostname, port, resource, is_secure = parse_url(url)
|
|
|
|
if socket:
|
|
return socket, (hostname, port, resource)
|
|
|
|
addrinfo_list, need_tunnel, auth = _get_addrinfo_list(
|
|
hostname, port, is_secure, proxy)
|
|
if not addrinfo_list:
|
|
raise WebSocketException(
|
|
"Host not found.: " + hostname + ":" + str(port))
|
|
|
|
sock = None
|
|
try:
|
|
sock = _open_socket(addrinfo_list, options.sockopt, options.timeout)
|
|
if need_tunnel:
|
|
sock = _tunnel(sock, hostname, port, auth)
|
|
|
|
if is_secure:
|
|
if HAVE_SSL:
|
|
sock = _ssl_socket(sock, options.sslopt, hostname)
|
|
else:
|
|
raise WebSocketException("SSL not available.")
|
|
|
|
return sock, (hostname, port, resource)
|
|
except:
|
|
if sock:
|
|
sock.close()
|
|
raise
|
|
|
|
|
|
def _get_addrinfo_list(hostname, port, is_secure, proxy):
|
|
phost, pport, pauth = get_proxy_info(
|
|
hostname, is_secure, proxy.host, proxy.port, proxy.auth, proxy.no_proxy)
|
|
try:
|
|
# when running on windows 10, getaddrinfo without socktype returns a socktype 0.
|
|
# This generates an error exception: `_on_error: exception Socket type must be stream or datagram, not 0`
|
|
# or `OSError: [Errno 22] Invalid argument` when creating socket. Force the socket type to SOCK_STREAM.
|
|
if not phost:
|
|
addrinfo_list = socket.getaddrinfo(
|
|
hostname, port, 0, socket.SOCK_STREAM, socket.SOL_TCP)
|
|
return addrinfo_list, False, None
|
|
else:
|
|
pport = pport and pport or 80
|
|
# when running on windows 10, the getaddrinfo used above
|
|
# returns a socktype 0. This generates an error exception:
|
|
# _on_error: exception Socket type must be stream or datagram, not 0
|
|
# Force the socket type to SOCK_STREAM
|
|
addrinfo_list = socket.getaddrinfo(phost, pport, 0, socket.SOCK_STREAM, socket.SOL_TCP)
|
|
return addrinfo_list, True, pauth
|
|
except socket.gaierror as e:
|
|
raise WebSocketAddressException(e)
|
|
|
|
|
|
def _open_socket(addrinfo_list, sockopt, timeout):
|
|
err = None
|
|
for addrinfo in addrinfo_list:
|
|
family, socktype, proto = addrinfo[:3]
|
|
sock = socket.socket(family, socktype, proto)
|
|
sock.settimeout(timeout)
|
|
for opts in DEFAULT_SOCKET_OPTION:
|
|
sock.setsockopt(*opts)
|
|
for opts in sockopt:
|
|
sock.setsockopt(*opts)
|
|
|
|
address = addrinfo[4]
|
|
err = None
|
|
while not err:
|
|
try:
|
|
sock.connect(address)
|
|
except ProxyConnectionError as error:
|
|
err = WebSocketProxyException(str(error))
|
|
err.remote_ip = str(address[0])
|
|
continue
|
|
except socket.error as error:
|
|
error.remote_ip = str(address[0])
|
|
try:
|
|
eConnRefused = (errno.ECONNREFUSED, errno.WSAECONNREFUSED)
|
|
except:
|
|
eConnRefused = (errno.ECONNREFUSED, )
|
|
if error.errno == errno.EINTR:
|
|
continue
|
|
elif error.errno in eConnRefused:
|
|
err = error
|
|
continue
|
|
else:
|
|
if sock:
|
|
sock.close()
|
|
raise error
|
|
else:
|
|
break
|
|
else:
|
|
continue
|
|
break
|
|
else:
|
|
if err:
|
|
raise err
|
|
|
|
return sock
|
|
|
|
|
|
def _wrap_sni_socket(sock, sslopt, hostname, check_hostname):
|
|
context = ssl.SSLContext(sslopt.get('ssl_version', ssl.PROTOCOL_SSLv23))
|
|
|
|
if sslopt.get('cert_reqs', ssl.CERT_NONE) != ssl.CERT_NONE:
|
|
cafile = sslopt.get('ca_certs', None)
|
|
capath = sslopt.get('ca_cert_path', None)
|
|
if cafile or capath:
|
|
context.load_verify_locations(cafile=cafile, capath=capath)
|
|
elif hasattr(context, 'load_default_certs'):
|
|
context.load_default_certs(ssl.Purpose.SERVER_AUTH)
|
|
if sslopt.get('certfile', None):
|
|
context.load_cert_chain(
|
|
sslopt['certfile'],
|
|
sslopt.get('keyfile', None),
|
|
sslopt.get('password', None),
|
|
)
|
|
# see
|
|
# https://github.com/liris/websocket-client/commit/b96a2e8fa765753e82eea531adb19716b52ca3ca#commitcomment-10803153
|
|
context.verify_mode = sslopt['cert_reqs']
|
|
if HAVE_CONTEXT_CHECK_HOSTNAME:
|
|
context.check_hostname = check_hostname
|
|
if 'ciphers' in sslopt:
|
|
context.set_ciphers(sslopt['ciphers'])
|
|
if 'cert_chain' in sslopt:
|
|
certfile, keyfile, password = sslopt['cert_chain']
|
|
context.load_cert_chain(certfile, keyfile, password)
|
|
if 'ecdh_curve' in sslopt:
|
|
context.set_ecdh_curve(sslopt['ecdh_curve'])
|
|
|
|
return context.wrap_socket(
|
|
sock,
|
|
do_handshake_on_connect=sslopt.get('do_handshake_on_connect', True),
|
|
suppress_ragged_eofs=sslopt.get('suppress_ragged_eofs', True),
|
|
server_hostname=hostname,
|
|
)
|
|
|
|
|
|
def _ssl_socket(sock, user_sslopt, hostname):
|
|
sslopt = dict(cert_reqs=ssl.CERT_REQUIRED)
|
|
sslopt.update(user_sslopt)
|
|
|
|
certPath = os.environ.get('WEBSOCKET_CLIENT_CA_BUNDLE')
|
|
if certPath and os.path.isfile(certPath) \
|
|
and user_sslopt.get('ca_certs', None) is None:
|
|
sslopt['ca_certs'] = certPath
|
|
elif certPath and os.path.isdir(certPath) \
|
|
and user_sslopt.get('ca_cert_path', None) is None:
|
|
sslopt['ca_cert_path'] = certPath
|
|
|
|
check_hostname = sslopt["cert_reqs"] != ssl.CERT_NONE and sslopt.pop(
|
|
'check_hostname', True)
|
|
sock = _wrap_sni_socket(sock, sslopt, hostname, check_hostname)
|
|
|
|
if not HAVE_CONTEXT_CHECK_HOSTNAME and check_hostname:
|
|
match_hostname(sock.getpeercert(), hostname)
|
|
|
|
return sock
|
|
|
|
|
|
def _tunnel(sock, host, port, auth):
|
|
debug("Connecting proxy...")
|
|
connect_header = "CONNECT %s:%d HTTP/1.1\r\n" % (host, port)
|
|
connect_header += "Host: %s:%d\r\n" % (host, port)
|
|
|
|
# TODO: support digest auth.
|
|
if auth and auth[0]:
|
|
auth_str = auth[0]
|
|
if auth[1]:
|
|
auth_str += ":" + auth[1]
|
|
encoded_str = base64encode(auth_str.encode()).strip().decode().replace('\n', '')
|
|
connect_header += "Proxy-Authorization: Basic %s\r\n" % encoded_str
|
|
connect_header += "\r\n"
|
|
dump("request header", connect_header)
|
|
|
|
send(sock, connect_header)
|
|
|
|
try:
|
|
status, resp_headers, status_message = read_headers(sock)
|
|
except Exception as e:
|
|
raise WebSocketProxyException(str(e))
|
|
|
|
if status != 200:
|
|
raise WebSocketProxyException(
|
|
"failed CONNECT via proxy status: %r" % status)
|
|
|
|
return sock
|
|
|
|
|
|
def read_headers(sock):
|
|
status = None
|
|
status_message = None
|
|
headers = {}
|
|
trace("--- response header ---")
|
|
|
|
while True:
|
|
line = recv_line(sock)
|
|
line = line.decode('utf-8').strip()
|
|
if not line:
|
|
break
|
|
trace(line)
|
|
if not status:
|
|
|
|
status_info = line.split(" ", 2)
|
|
status = int(status_info[1])
|
|
if len(status_info) > 2:
|
|
status_message = status_info[2]
|
|
else:
|
|
kv = line.split(":", 1)
|
|
if len(kv) == 2:
|
|
key, value = kv
|
|
if key.lower() == "set-cookie" and headers.get("set-cookie"):
|
|
headers["set-cookie"] = headers.get("set-cookie") + "; " + value.strip()
|
|
else:
|
|
headers[key.lower()] = value.strip()
|
|
else:
|
|
raise WebSocketException("Invalid header")
|
|
|
|
trace("-----------------------")
|
|
|
|
return status, headers, status_message
|