70 lines
1.7 KiB
JavaScript
70 lines
1.7 KiB
JavaScript
var ThrottleGroup = require("stream-throttle").ThrottleGroup;
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module.exports = throttle;
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/**
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*
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*/
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function throttle (opts) {
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var options = {
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local_host: "localhost",
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remote_host: "localhost",
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upstream: 10*1024,
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downstream: opts.speed.speed * 1024,
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keepalive: false
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};
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var serverOpts = {
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allowHalfOpen: true,
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rejectUnauthorized: false
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};
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var module = "net";
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var method = "createConnection";
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if (opts.key) {
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module = "tls";
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method = "connect";
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serverOpts.key = opts.key;
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serverOpts.cert = opts.cert;
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}
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return require(module).createServer(serverOpts, function (local) {
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var remote = require(module)[method]({
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host: opts.target.hostname,
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port: opts.target.port,
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allowHalfOpen: true,
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rejectUnauthorized: false
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});
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var upThrottle = new ThrottleGroup({ rate: options.upstream });
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var downThrottle = new ThrottleGroup({ rate: options.downstream });
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var localThrottle = upThrottle.throttle();
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var remoteThrottle = downThrottle.throttle();
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setTimeout(function () {
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local
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.pipe(localThrottle)
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.pipe(remote);
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}, opts.speed.latency);
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setTimeout(function () {
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remote
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.pipe(remoteThrottle)
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.pipe(local);
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}, opts.speed.latency);
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local.on("error", function() {
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remote.destroy();
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local.destroy();
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});
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remote.on("error", function() {
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local.destroy();
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remote.destroy();
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});
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});
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} |