Katyusha (protected name)
Katyusha API (protected name)
```js // app.js async didReady() { this.app.httpclient.on('request', (req) => { // 可以在这里设置一些 trace headers，方便全链路跟踪 req.args.headers = transHeader(req.ctx, req.args.headers || {}) }) } ```
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