throttle-server.js
1.67 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
var ThrottleGroup = require("stream-throttle").ThrottleGroup;
module.exports = throttle;
/**
*
*/
function throttle (opts) {
var options = {
local_host: "localhost",
remote_host: "localhost",
upstream: 10*1024,
downstream: opts.speed.speed * 1024,
keepalive: false
};
var serverOpts = {
allowHalfOpen: true,
rejectUnauthorized: false
};
var module = "net";
var method = "createConnection";
if (opts.key) {
module = "tls";
method = "connect";
serverOpts.key = opts.key;
serverOpts.cert = opts.cert;
}
return require(module).createServer(serverOpts, function (local) {
var remote = require(module)[method]({
host: opts.target.hostname,
port: opts.target.port,
allowHalfOpen: true,
rejectUnauthorized: false
});
var upThrottle = new ThrottleGroup({ rate: options.upstream });
var downThrottle = new ThrottleGroup({ rate: options.downstream });
var localThrottle = upThrottle.throttle();
var remoteThrottle = downThrottle.throttle();
setTimeout(function () {
local
.pipe(localThrottle)
.pipe(remote);
}, opts.speed.latency);
setTimeout(function () {
remote
.pipe(remoteThrottle)
.pipe(local);
}, opts.speed.latency);
local.on("error", function() {
remote.destroy();
local.destroy();
});
remote.on("error", function() {
local.destroy();
remote.destroy();
});
});
}