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/**
* Centro extension for limiting the rate of messages streams.
*
* @module centro-js/lib/server_extensions/throttle
*/
"use strict";
var Throttle = require('stream-throttle').Throttle;
/**
* Limit the rate at which message data can be published by clients.
*
* @param {Object} config - See {@link https://github.com/tjgq/node-stream-throttle|Throttle}.
*/
exports.throttle_publish_streams = function (config)
{
return {
pre_connect: function (info)
{
this.pipeline(info.mqserver, 'publish_requested', function (topic, duplex, options, cb, next)
{
var t = new Throttle(config);
t.on('error', this.relay_error);
duplex.pipe(t);
next(topic, t, options, cb);
});
}
};
};
/**
* Limit the rate at which message data is sent to clients.
*
* @param {Object} config - See {@link https://github.com/tjgq/node-stream-throttle|Throttle}.
*/
exports.throttle_message_streams = function (config)
{
return {
pre_connect: function (info)
{
this.pipeline(info.mqserver, 'message', function (stream, info, multiplex, cb, next)
{
var t = new Throttle(config);
t.on('error', this.relay_error);
stream.pipe(t);
next(t, info, multiplex, cb);
});
}
};
};
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