[socks] Add socks.py from @bluec0re's public domain implementation
https://gist.github.com/bluec0re/cafd3764412967417fd3
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Yen Chi Hsuan
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1 changed files with 336 additions and 0 deletions
336
youtube_dl/socks.py
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336
youtube_dl/socks.py
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# This is free and unencumbered software released into the public domain.
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#
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# Anyone is free to copy, modify, publish, use, compile, sell, or
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# distribute this software, either in source code form or as a compiled
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# binary, for any purpose, commercial or non-commercial, and by any
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# means.
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#
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# In jurisdictions that recognize copyright laws, the author or authors
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# of this software dedicate any and all copyright interest in the
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# software to the public domain. We make this dedication for the benefit
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# of the public at large and to the detriment of our heirs and
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# successors. We intend this dedication to be an overt act of
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# relinquishment in perpetuity of all present and future rights to this
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# software under copyright law.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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# OTHER DEALINGS IN THE SOFTWARE.
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#
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# For more information, please refer to <http://unlicense.org/>
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#
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# Example:
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# import socks
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# import ftplib
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# import socket
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#
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# socks.patch_socket()
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#
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# f = ftplib.FTP('ftp.kernel.org')
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# f.login()
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# print f.retrlines('LIST')
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# f.quit()
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#
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# s = socket.create_connection(('www.google.com', 80))
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# s.sendall('HEAD / HTTP/1.0\r\n\r\n')
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# print s.recv(1024)
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# s.close()
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from __future__ import unicode_literals
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import os
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import struct
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import socket
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import time
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__author__ = 'Timo Schmid <coding@timoschmid.de>'
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_orig_socket = socket.socket
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try:
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from collections import namedtuple
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except ImportError:
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from Collections import namedtuple
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try:
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from urllib.parse import urlparse
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except:
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from urlparse import urlparse
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try:
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from enum import Enum
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except ImportError:
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Enum = object
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class ProxyError(IOError): pass
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class Socks4Error(ProxyError):
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CODES = {
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0x5B: 'request rejected or failed',
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0x5C: 'request rejected becasue SOCKS server cannot connect to identd on the client',
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0x5D: 'request rejected because the client program and identd report different user-ids'
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}
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def __init__(self, code=None, msg=None):
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if code is not None and msg is None:
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msg = self.CODES.get(code)
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if msg is None:
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msg = 'unknown error'
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super(Socks4Error, self).__init__(code, msg)
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class Socks5Error(Socks4Error):
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CODES = {
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0x01: 'general SOCKS server failure',
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0x02: 'connection not allowed by ruleset',
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0x03: 'Network unreachable',
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0x04: 'Host unreachable',
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0x05: 'Connection refused',
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0x06: 'TTL expired',
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0x07: 'Command not supported',
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0x08: 'Address type not supported',
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0xFE: 'unknown username or invalid password',
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0xFF: 'all offered authentication methods were rejected'
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}
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class ProxyType(Enum):
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SOCKS4 = 0
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SOCKS4A = 1
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SOCKS5 = 2
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Proxy = namedtuple('Proxy', ('type', 'host', 'port', 'username', 'password', 'remote_dns'))
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_default_proxy = None
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def setdefaultproxy(proxytype=None, addr=None, port=None, rdns=True, username=None, password=None, allow_env_override=True):
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global _default_proxy
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if allow_env_override:
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all_proxy = os.environ.get('ALL_PROXY', os.environ.get('all_proxy'))
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if all_proxy:
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all_proxy = urlparse(all_proxy)
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if all_proxy.scheme.startswith('socks'):
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if all_proxy.scheme == 'socks' or all_proxy.scheme == 'socks4':
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proxytype = ProxyType.SOCKS4
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elif all_proxy.scheme == 'socks4a':
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proxytype = ProxyType.SOCKS4A
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elif all_proxy.scheme == 'socks5':
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proxytype = ProxyType.SOCKS5
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addr = all_proxy.hostname
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port = all_proxy.port
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username = all_proxy.username
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password = all_proxy.password
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if proxytype is not None:
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_default_proxy = Proxy(proxytype, addr, port, username, password, rdns)
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def wrap_socket(sock):
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return socksocket(_sock=sock._sock)
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def wrap_module(module):
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if hasattr(module, 'socket'):
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sock = module.socket
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if isinstance(sock, socket.socket):
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module.socket = sockssocket
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elif hasattr(socket, 'socket'):
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socket.socket = sockssocket
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def patch_socket():
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import sys
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if 'socket' not in sys.modules:
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import socket
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sys.modules['socket'].socket = sockssocket
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class sockssocket(socket.socket):
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def __init__(self, *args, **kwargs):
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self.__proxy = None
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if 'proxy' in kwargs:
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self.__proxy = kwargs['proxy']
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del kwargs['proxy']
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super(sockssocket, self).__init__(*args, **kwargs)
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@property
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def _proxy(self):
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if self.__proxy:
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return self.__proxy
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return _default_proxy
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@property
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def _proxy_port(self):
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if self._proxy:
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if self._proxy.port:
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return self._proxy.port
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return 1080
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return None
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def setproxy(self, proxytype=None, addr=None, port=None, rdns=True, username=None, password=None):
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if proxytype is None:
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self.__proxy = None
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else:
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self.__proxy = Proxy(proxytype, addr, port, username, password, rdns)
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def recvall(self, cnt):
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data = b''
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while len(data) < cnt:
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cur = self.recv(cnt - len(data))
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if not cur:
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raise IOError("{0} bytes missing".format(cnt-len(data)))
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data += cur
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return data
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def _setup_socks4(self, address, is_4a=False):
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destaddr, port = address
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try:
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ipaddr = socket.inet_aton(destaddr)
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except socket.error:
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if is_4a and self._proxy.remote_dns:
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ipaddr = struct.pack('!BBBB', 0, 0, 0, 0xFF)
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else:
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ipaddr = socket.inet_aton(socket.gethostbyname(destaddr))
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packet = struct.pack('!BBH', 0x4, 0x1, port) + ipaddr
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if self._proxy.username:
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username = self._proxy.username
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if hasattr(username, 'encode'):
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username = username.encode()
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packet += struct.pack('!{0}s'.format(len(username)+1), username)
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else:
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packet += b'\x00'
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if is_4a and self._proxy.remote_dns:
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if hasattr(destaddr, 'encode'):
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destaddr = destaddr.encode()
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packet += struct.pack('!{0}s'.format(len(destaddr)+1), destaddr)
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self.sendall(packet)
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packet = self.recvall(8)
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nbyte, resp_code, dstport, dsthost = struct.unpack('!BBHI', packet)
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# check valid response
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if nbyte != 0x00:
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self.close()
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raise ProxyError(0, "Invalid response from server. Expected {0:02x} got {1:02x}".format(0, nbyte))
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# access granted
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if resp_code != 0x5a:
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self.close()
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raise Socks4Error(resp_code)
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def _setup_socks5(self, address):
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destaddr, port = address
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try:
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ipaddr = socket.inet_aton(destaddr)
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except socket.error:
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if self._proxy.remote_dns:
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ipaddr = None
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else:
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ipaddr = socket.inet_aton(socket.gethostbyname(destaddr))
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auth_methods = 1
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if self._proxy.username and self._proxy.password:
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# two auth methods available
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auth_methods = 2
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packet = struct.pack('!BBB', 0x5, auth_methods, 0x00) # no auth
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if self._proxy.username and self._proxy.password:
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packet += struct.pack('!B', 0x02) # user/pass auth
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self.sendall(packet)
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packet = self.recvall(2)
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version, method = struct.unpack('!BB', packet)
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# check valid response
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if version != 0x05:
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self.close()
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raise ProxyError(0, "Invalid response from server. Expected {0:02x} got {1:02x}".format(5, version))
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# no auth methods
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if method == 0xFF:
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self.close()
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raise Socks5Error(method)
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# user/pass auth
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if method == 0x01:
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username = self._proxy.username
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if hasattr(username, 'encode'):
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username = username.encode()
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password = self._proxy.password
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if hasattr(password, 'encode'):
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password = password.encode()
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packet = struct.pack('!BB', 1, len(username)) + username
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packet += struct.pack('!B', len(password)) + password
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self.sendall(packet)
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packet = self.recvall(2)
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version, status = struct.unpack('!BB', packet)
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if version != 0x01:
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self.close()
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raise ProxyError(0, "Invalid response from server. Expected {0:02x} got {1:02x}".format(1, version))
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if status != 0x00:
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self.close()
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raise Socks5Error(1)
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elif method == 0x00: # no auth
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pass
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packet = struct.pack('!BBB', 5, 1, 0)
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if ipaddr is None:
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if hasattr(destaddr, 'encode'):
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destaddr = destaddr.encode()
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packet += struct.pack('!BB', 3, len(destaddr)) + destaddr
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else:
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packet += struct.pack('!B', 1) + ipaddr
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packet += struct.pack('!H', port)
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self.sendall(packet)
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packet = self.recvall(4)
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version, status, _, atype = struct.unpack('!BBBB', packet)
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if version != 0x05:
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self.close()
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raise ProxyError(0, "Invalid response from server. Expected {0:02x} got {1:02x}".format(5, version))
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if status != 0x00:
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self.close()
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raise Socks5Error(status)
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if atype == 0x01:
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destaddr = self.recvall(4)
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elif atype == 0x03:
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alen = struct.unpack('!B', self.recv(1))[0]
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destaddr = self.recvall(alen)
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elif atype == 0x04:
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destaddr = self.recvall(16)
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destport = struct.unpack('!H', self.recvall(2))[0]
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def _make_proxy(self, connect_func, address):
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if self._proxy.type == ProxyType.SOCKS4:
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result = connect_func(self, (self._proxy.host, self._proxy_port))
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if result != 0 and result is not None:
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return result
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self._setup_socks4(address)
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elif self._proxy.type == ProxyType.SOCKS4A:
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result = connect_func(self, (self._proxy.host, self._proxy_port))
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if result != 0 and result is not None:
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return result
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self._setup_socks4(address, is_4a=True)
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elif self._proxy.type == ProxyType.SOCKS5:
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result = connect_func(self, (self._proxy.host, self._proxy_port))
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if result != 0 and result is not None:
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return result
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self._setup_socks5(address)
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else:
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return connect_func(self, address)
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def connect(self, address):
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self._make_proxy(_orig_socket.connect, address)
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def connect_ex(self, address):
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return self._make_proxy(_orig_socket.connect_ex, address)
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