Начало наработок

node_modules/localtunnel/lib/HeaderHostTransformer.js

@@ -0,0 +1,23 @@
+const { Transform } = require('stream');
+
+class HeaderHostTransformer extends Transform {
+  constructor(opts = {}) {
+    super(opts);
+    this.host = opts.host || 'localhost';
+    this.replaced = false;
+  }
+
+  _transform(data, encoding, callback) {
+    callback(
+      null,
+      this.replaced // after replacing the first instance of the Host header we just become a regular passthrough
+        ? data
+        : data.toString().replace(/(\r\n[Hh]ost: )\S+/, (match, $1) => {
+            this.replaced = true;
+            return $1 + this.host;
+          })
+    );
+  }
+}
+
+module.exports = HeaderHostTransformer;