问题
In old versions of Socket.IO (< 0.9), I configured "close timeout" and "transports" this way:
io.set("transports", ["xhr-polling"]);
io.set("close timeout", 3);
But now, the command io.set has been deprecated. How do I define close timeout and transports?
When I use the old version this message appears:
Option close timeout is not valid.
回答1:
See the documentation here: http://socket.io/docs/migrating-from-0-9/#configuration-differences
Basically, you just have to set those when you initialize the server:
var socket = require('socket.io')({
// options go here
});
来源：https://stackoverflow.com/questions/24685198/configure-timeout-and-transports-in-socket-io-1-0