update

node_modules/browser-sync-ui/lib/plugins/network-throttle/throttle-server.js

@@ -0,0 +1,70 @@
+var ThrottleGroup = require("stream-throttle").ThrottleGroup;
+
+module.exports = throttle;
+
+/**
+ *
+ */
+function throttle (opts, listenHost) {
+
+    var options = {
+        local_host:  listenHost,
+        remote_host: listenHost,
+        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();
+        });
+    });
+}