improve client isConnected method

boswatch/network/client.py

@@ -105,13 +105,7 @@ class TCPClient:
     @property
     def isConnected(self):
         """!Property of client connected state"""
-        try:
-            aliveMsg = "<alive>"
-            header = str(len(aliveMsg)).ljust(HEADERSIZE)
-            self._sock.sendall(bytes(header + aliveMsg, "utf-8"))
+        _, write, _ = select.select([], [self._sock], [], 0.1)
+        if write:
             return True
-        except socket.error as e:
-            if e.errno is 32:  # broken pipe - no one will read from this pipe anymore
-                return False
-            logging.error(e)
         return False

boswatch/network/server.py

@@ -55,9 +55,6 @@ class _ThreadedTCPRequestHandler(socketserver.BaseRequestHandler):
                 length = int(header.decode("utf-8").strip())
                 data = self.request.recv(length).decode("utf-8")
 
-                if data == "<alive>":
-                    continue
-
                 logging.debug("%s recv %d bytes:\n%s", req_name, length, pformat(data))
 
                 # add a new entry and the decoded data dict as an string in utf-8 and an timestamp