使用socket.io 进行广播？
使用 socket.broadcast() 向客户端广播一个简单的函数，该函数从数据库结果中提供 JSON 字符串。我希望在值发生变化时更新客户端。目前广播功能是使用setTimeout每1秒连续广播一次。查看 Firebug 中的请求日志，有连续的 GET 响应，我认为这不是一件好事......
只是想知道使用套接字的最佳实践是什么？这些请求会杀死某些东西吗？解决方案是否是比较时间戳，或者类似的方法来停止不必要的发送请求？
//server-side
function checkData() {
client.query('SELECT * FROM data', function selectCb(err, data) {
socket.broadcast(processData(data));
setTimeout(checkData, 1000);
});
}
//client-side
socket.on('message', function(data) {
$('#container').html(JSON.stringify(JSON.parse(data), null));
});
//sample data
[{
"type":"Statistic1",
"value":65.2,
"timestamp":"2011-04-29T16:22:39.000Z"
},{
"type":"Statistic2",
"value":18.6,
"timestamp":"2011-04-29T16:22:39.000Z"
}]
感谢您的帮助！
A simple function that serves a JSON string from a database result is broadcasted to the client, using socket.broadcast(). What I wish to do it update the client side when the value changes. Currently, the broadcast function is using setTimeout to broadcast continously every 1 second. Looking at the request logs in Firebug, there is a continuous GET response, which I dont think is a good thing...
Just wondering what the best practice is for using sockets? Are these requests going to kill something? Would a solution be comparing timestamps, or something similar to stop unnecessarily sending requests?
//server-side
function checkData() {
client.query('SELECT * FROM data', function selectCb(err, data) {
socket.broadcast(processData(data));
setTimeout(checkData, 1000);
});
}
//client-side
socket.on('message', function(data) {
$('#container').html(JSON.stringify(JSON.parse(data), null));
});
//sample data
[{
"type":"Statistic1",
"value":65.2,
"timestamp":"2011-04-29T16:22:39.000Z"
},{
"type":"Statistic2",
"value":18.6,
"timestamp":"2011-04-29T16:22:39.000Z"
}]
Thanks for your help!
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这取决于您发送的数据。套接字的好处之一是您可以选择何时向客户端发送数据。保存一些获取请求，仅在有新内容要发送时广播数据。
It depends on the data you are sending. One of the benefits of sockets is that you can choose when to send data to the clients. Save some of the get requests and only broadcast data when you have something new to send.