Very early work on implementing websocket monitoring method.

lib/websocket/_socket.py

@@ -0,0 +1,121 @@
+"""
+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 socket
+import six
+
+from ._exceptions import *
+from ._utils import *
+from ._ssl_compat 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.")
+
+    try:
+        bytes = sock.recv(bufsize)
+    except socket.timeout as e:
+        message = extract_err_message(e)
+        raise WebSocketTimeoutException(message)
+    except SSLError as e:
+        message = extract_err_message(e)
+        if message == "The read operation timed out":
+            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.")
+
+    try:
+        return sock.send(data)
+    except socket.timeout as e:
+        message = extract_err_message(e)
+        raise WebSocketTimeoutException(message)
+    except Exception as e:
+        message = extract_err_message(e)
+        if message and "timed out" in message:
+            raise WebSocketTimeoutException(message)
+        else:
+            raise