mirror of https://github.com/jkjoy/sunpeiwen.git
77 lines
1.8 KiB
JavaScript
77 lines
1.8 KiB
JavaScript
var spliceOne = require('./utils').spliceOne;
|
|
|
|
function Manager(interval, streamInterval, kaCountMax) {
|
|
var streams = this._streams = [];
|
|
this._timer = undefined;
|
|
this._timerInterval = interval;
|
|
this._timerfn = function() {
|
|
var now = Date.now();
|
|
for (var i = 0, len = streams.length, s, last; i < len; ++i) {
|
|
s = streams[i];
|
|
last = s._kalast;
|
|
if (last && (now - last) >= streamInterval) {
|
|
if (++s._kacnt > kaCountMax) {
|
|
var err = new Error('Keepalive timeout');
|
|
err.level = 'client-timeout';
|
|
s.emit('error', err);
|
|
s.disconnect();
|
|
spliceOne(streams, i);
|
|
--i;
|
|
len = streams.length;
|
|
} else {
|
|
s._kalast = now;
|
|
// XXX: if the server ever starts sending real global requests to the
|
|
// client, we will need to add a dummy callback here to keep the
|
|
// correct reply order
|
|
s.ping();
|
|
}
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
Manager.prototype.start = function() {
|
|
if (this._timer)
|
|
this.stop();
|
|
this._timer = setInterval(this._timerfn, this._timerInterval);
|
|
};
|
|
|
|
Manager.prototype.stop = function() {
|
|
if (this._timer) {
|
|
clearInterval(this._timer);
|
|
this._timer = undefined;
|
|
}
|
|
};
|
|
|
|
Manager.prototype.add = function(stream) {
|
|
var streams = this._streams,
|
|
self = this;
|
|
|
|
stream.once('end', function() {
|
|
self.remove(stream);
|
|
}).on('packet', resetKA);
|
|
|
|
streams[streams.length] = stream;
|
|
|
|
resetKA();
|
|
|
|
if (!this._timer)
|
|
this.start();
|
|
|
|
function resetKA() {
|
|
stream._kalast = Date.now();
|
|
stream._kacnt = 0;
|
|
}
|
|
};
|
|
|
|
Manager.prototype.remove = function(stream) {
|
|
var streams = this._streams,
|
|
index = streams.indexOf(stream);
|
|
if (index > -1)
|
|
spliceOne(streams, index);
|
|
if (!streams.length)
|
|
this.stop();
|
|
};
|
|
|
|
module.exports = Manager;
|