我写了一个非常简单的脚本来检索连接用户列表.
var app, io, server;
app = require("express")();
server = require("http").createServer(app);
io = require("socket.io").listen(server);
server.listen(1339);
app.get("/", function(req, res) {
res.sendfile(__dirname + "/index.html");
});
console.log('INIT', io.sockets.manager.server.connections);
io.sockets.on("connection", function(socket) {
console.log('CONNECT: ', io.sockets.manager.server.connections);
socket.on("disconnect", function(data) {
console.log('DISCONNECT: ', io.sockets.manager.server.connections);
});
});
和HTML:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>title</title>
</head>
<body>
<script src="/socket.io/socket.io.js"></script>
<script>
var socket = io.connect('http://localhost:1339');
</script>
</body>
</html>
当我运行应用程序时,我进入0init,但是一旦我在浏览器中打开页面,它就会给我4连接而不仅仅是1.我也收到connections property is deprecated. Use getConnections() method警告.我在v0.10.15中使用节点,在v0.9.16中使用socket.io.
您需要从其他位置获取客户端数量:
io.sockets.clients().length
但是,当您阅读此活动GitHub问题时,您可能希望避免该操作,因为它可能导致额外的内存泄漏(超出套接字已经发生的事情).
这是一个完整的工作示例:
var app = require('express')();
var server = require("http").createServer(app);
var io = require('socket.io').listen(server);
server.listen(1339);
app.get('/', function(req, res) {
return res.sendfile(__dirname + "/index.html");
});
/*
to obtain number of connected clients
io.sockets.clients().length
*/
console.log("INIT", io.sockets.clients().length );
io.sockets.on("connection", function(socket) {
console.log("CONNECT:" + io.sockets.clients().length);
socket.on("disconnect", function(data){
console.log("DISCONNECT: ", io.sockets.clients().length);
});
});
断开事件发生在客户端被删除之前,因此计数将比客户端总数高一个(取决于您如何看待它).
此外,on由于某种原因,您让事件处理程序返回值,因此我删除了它.
只使用一个简单的计数器,您就可以获得更好的运气,而不是使用该功能:
var clientsConnected = 0;
console.log("INIT", io.sockets.clients().length );
io.sockets.on("connection", function(socket) {
console.log("CONNECT:" + ++clientsConnected);
socket.on("disconnect", function(data){
console.log("DISCONNECT: ", --clientsConnected);
});
});
有些人显然报告断开连接的数量可能超过连接数,因此您可能希望防止计数器降至零以下.
连接两个客户端(然后断开一个):
info: socket.io started
INIT 0
debug: served static content /socket.io.js
debug: client authorized
info: handshake authorized eJcvVsr60fmRzhVpQ6rO
debug: setting request GET /socket.io/1/websocket/eJcvVsr60fmRzhVpQ6rO
debug: set heartbeat interval for client eJcvVsr60fmRzhVpQ6rO
debug: client authorized for
debug: websocket writing 1::
CONNECT:1
debug: served static content /socket.io.js
debug: client authorized
info: handshake authorized 28lUudTS3KtCphd0Q6rP
debug: setting request GET /socket.io/1/websocket/28lUudTS3KtCphd0Q6rP
debug: set heartbeat interval for client 28lUudTS3KtCphd0Q6rP
debug: client authorized for
debug: websocket writing 1::
CONNECT:2
info: transport end (socket end)
debug: set close timeout for client 28lUudTS3KtCphd0Q6rP
debug: cleared close timeout for client 28lUudTS3KtCphd0Q6rP
debug: cleared heartbeat interval for client 28lUudTS3KtCphd0Q6rP
DISCONNECT: 2
debug: discarding transport
info: transport end (socket end)
debug: set close timeout for client eJcvVsr60fmRzhVpQ6rO
debug: cleared close timeout for client eJcvVsr60fmRzhVpQ6rO
debug: cleared heartbeat interval for client eJcvVsr60fmRzhVpQ6rO
DISCONNECT: 1
debug: discarding transport
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