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"""
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 errno
import select
import socket
import six
import sys
from ._exceptions import *
from ._ssl_compat import *
from ._utils import *
DEFAULT_SOCKET_OPTION = [(socket.SOL_TCP, socket.TCP_NODELAY, 1)]
if hasattr(socket, "SO_KEEPALIVE"):
DEFAULT_SOCKET_OPTION.append((socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1))
if hasattr(socket, "TCP_KEEPIDLE"):
DEFAULT_SOCKET_OPTION.append((socket.SOL_TCP, socket.TCP_KEEPIDLE, 30))
if hasattr(socket, "TCP_KEEPINTVL"):
DEFAULT_SOCKET_OPTION.append((socket.SOL_TCP, socket.TCP_KEEPINTVL, 10))
if hasattr(socket, "TCP_KEEPCNT"):
DEFAULT_SOCKET_OPTION.append((socket.SOL_TCP, socket.TCP_KEEPCNT, 3))
_default_timeout = None
__all__ = ["DEFAULT_SOCKET_OPTION", "sock_opt", "setdefaulttimeout", "getdefaulttimeout",
"recv", "recv_line", "send"]
class sock_opt(object):
def __init__(self, sockopt, sslopt):
if sockopt is None:
sockopt = []
if sslopt is None:
sslopt = {}
self.sockopt = sockopt
self.sslopt = sslopt
self.timeout = None
def setdefaulttimeout(timeout):
"""
Set the global timeout setting to connect.
timeout: default socket timeout time. This value is second.
"""
global _default_timeout
_default_timeout = timeout
def getdefaulttimeout():
"""
Return the global timeout setting(second) to connect.
"""
return _default_timeout
def recv(sock, bufsize):
if not sock:
raise WebSocketConnectionClosedException("socket is already closed.")
def _recv():
try:
return sock.recv(bufsize)
except SSLWantReadError:
pass
except socket.error as exc:
error_code = extract_error_code(exc)
if error_code is None:
raise
if error_code != errno.EAGAIN or error_code != errno.EWOULDBLOCK:
raise
r, w, e = select.select((sock, ), (), (), sock.gettimeout())
if r:
return sock.recv(bufsize)
try:
if sock.gettimeout() == 0:
bytes_ = sock.recv(bufsize)
else:
bytes_ = _recv()
except socket.timeout as e:
message = extract_err_message(e)
raise WebSocketTimeoutException(message)
except SSLError as e:
message = extract_err_message(e)
if isinstance(message, str) and 'timed out' in message:
raise WebSocketTimeoutException(message)
else:
raise
if not bytes_:
raise WebSocketConnectionClosedException(
"Connection is already closed.")
return bytes_
def recv_line(sock):
line = []
while True:
c = recv(sock, 1)
line.append(c)
if c == six.b("\n"):
break
return six.b("").join(line)
def send(sock, data):
if isinstance(data, six.text_type):
data = data.encode('utf-8')
if not sock:
raise WebSocketConnectionClosedException("socket is already closed.")
def _send():
try:
return sock.send(data)
except SSLWantWriteError:
pass
except socket.error as exc:
error_code = extract_error_code(exc)
if error_code is None:
raise
if error_code != errno.EAGAIN or error_code != errno.EWOULDBLOCK:
raise
r, w, e = select.select((), (sock, ), (), sock.gettimeout())
if w:
return sock.send(data)
try:
if sock.gettimeout() == 0:
return sock.send(data)
else:
return _send()
except socket.timeout as e:
message = extract_err_message(e)
raise WebSocketTimeoutException(message)
except Exception as e:
message = extract_err_message(e)
if isinstance(message, str) and "timed out" in message:
raise WebSocketTimeoutException(message)
else:
raise
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