generalized read loop in favor of ssl-only 'drain'

tweaking gevent ssl PR WIP

cassandra/io/geventreactor.py

@@ -79,9 +79,6 @@ class GeventConnection(Connection):
                 self._socket = socket.socket(af, socktype, proto)
                 if self.ssl_options:
                     self._socket = ssl.wrap_socket(self._socket, **self.ssl_options)
-                    self._ssl_socket = True
-                else:
-                    self._ssl_socket = False
                 self._socket.settimeout(1.0)
                 self._socket.connect(sockaddr)
                 sockerr = None
@@ -155,15 +152,11 @@ class GeventConnection(Connection):
                 return
 
             try:
-                buf = self._socket.recv(self.in_buffer_size)
-                self._iobuf.write(buf)
-                if self._ssl_socket:
-                    # We need to drain pending data when dealing with a SSL socket
-                    data_left = self._socket.pending()
-                    while data_left:
-                        buf = self._socket.recv(data_left)
-                        self._iobuf.write(buf)
-                        data_left = self._socket.pending()
+                while True:
+                    buf = self._socket.recv(self.in_buffer_size)
+                    self._iobuf.write(buf)
+                    if len(buf) < self.in_buffer_size:
+                        break
             except socket.error as err:
                 if not is_timeout(err):
                     log.debug("Exception during socket recv for %s: %s", self, err)