You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
163 lines
4.6 KiB
163 lines
4.6 KiB
"""
|
|
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 02110-1335 USA
|
|
|
|
"""
|
|
|
|
import os
|
|
import socket
|
|
import struct
|
|
|
|
from six.moves.urllib.parse import urlparse
|
|
|
|
|
|
__all__ = ["parse_url", "get_proxy_info"]
|
|
|
|
|
|
def parse_url(url):
|
|
"""
|
|
parse url and the result is tuple of
|
|
(hostname, port, resource path and the flag of secure mode)
|
|
|
|
url: url string.
|
|
"""
|
|
if ":" not in url:
|
|
raise ValueError("url is invalid")
|
|
|
|
scheme, url = url.split(":", 1)
|
|
|
|
parsed = urlparse(url, scheme="ws")
|
|
if parsed.hostname:
|
|
hostname = parsed.hostname
|
|
else:
|
|
raise ValueError("hostname is invalid")
|
|
port = 0
|
|
if parsed.port:
|
|
port = parsed.port
|
|
|
|
is_secure = False
|
|
if scheme == "ws":
|
|
if not port:
|
|
port = 80
|
|
elif scheme == "wss":
|
|
is_secure = True
|
|
if not port:
|
|
port = 443
|
|
else:
|
|
raise ValueError("scheme %s is invalid" % scheme)
|
|
|
|
if parsed.path:
|
|
resource = parsed.path
|
|
else:
|
|
resource = "/"
|
|
|
|
if parsed.query:
|
|
resource += "?" + parsed.query
|
|
|
|
return hostname, port, resource, is_secure
|
|
|
|
|
|
DEFAULT_NO_PROXY_HOST = ["localhost", "127.0.0.1"]
|
|
|
|
|
|
def _is_ip_address(addr):
|
|
try:
|
|
socket.inet_aton(addr)
|
|
except socket.error:
|
|
return False
|
|
else:
|
|
return True
|
|
|
|
|
|
def _is_subnet_address(hostname):
|
|
try:
|
|
addr, netmask = hostname.split("/")
|
|
return _is_ip_address(addr) and 0 <= int(netmask) < 32
|
|
except ValueError:
|
|
return False
|
|
|
|
|
|
def _is_address_in_network(ip, net):
|
|
ipaddr = struct.unpack('I', socket.inet_aton(ip))[0]
|
|
netaddr, bits = net.split('/')
|
|
netmask = struct.unpack('I', socket.inet_aton(netaddr))[0] & ((2 << int(bits) - 1) - 1)
|
|
return ipaddr & netmask == netmask
|
|
|
|
|
|
def _is_no_proxy_host(hostname, no_proxy):
|
|
if not no_proxy:
|
|
v = os.environ.get("no_proxy", "").replace(" ", "")
|
|
no_proxy = v.split(",")
|
|
if not no_proxy:
|
|
no_proxy = DEFAULT_NO_PROXY_HOST
|
|
|
|
if hostname in no_proxy:
|
|
return True
|
|
elif _is_ip_address(hostname):
|
|
return any([_is_address_in_network(hostname, subnet) for subnet in no_proxy if _is_subnet_address(subnet)])
|
|
|
|
return False
|
|
|
|
|
|
def get_proxy_info(
|
|
hostname, is_secure, proxy_host=None, proxy_port=0, proxy_auth=None,
|
|
no_proxy=None, proxy_type='http'):
|
|
"""
|
|
try to retrieve proxy host and port from environment
|
|
if not provided in options.
|
|
result is (proxy_host, proxy_port, proxy_auth).
|
|
proxy_auth is tuple of username and password
|
|
of proxy authentication information.
|
|
|
|
hostname: websocket server name.
|
|
|
|
is_secure: is the connection secure? (wss)
|
|
looks for "https_proxy" in env
|
|
before falling back to "http_proxy"
|
|
|
|
options: "http_proxy_host" - http proxy host name.
|
|
"http_proxy_port" - http proxy port.
|
|
"http_no_proxy" - host names, which doesn't use proxy.
|
|
"http_proxy_auth" - http proxy auth information.
|
|
tuple of username and password.
|
|
default is None
|
|
"proxy_type" - if set to "socks5" PySocks wrapper
|
|
will be used in place of a http proxy.
|
|
default is "http"
|
|
"""
|
|
if _is_no_proxy_host(hostname, no_proxy):
|
|
return None, 0, None
|
|
|
|
if proxy_host:
|
|
port = proxy_port
|
|
auth = proxy_auth
|
|
return proxy_host, port, auth
|
|
|
|
env_keys = ["http_proxy"]
|
|
if is_secure:
|
|
env_keys.insert(0, "https_proxy")
|
|
|
|
for key in env_keys:
|
|
value = os.environ.get(key, None)
|
|
if value:
|
|
proxy = urlparse(value)
|
|
auth = (proxy.username, proxy.password) if proxy.username else None
|
|
return proxy.hostname, proxy.port, auth
|
|
|
|
return None, 0, None
|
|
|