YARP
A toolkit for developing high-performance HTTP reverse proxy apps
... proxies, and customization of those proxies had a high cost and ongoing maintenance considerations. Many of the existing proxies were built to support HTTP/1.1, but with workloads changing to include gRPC traffic, they require HTTP/2 support which requires a significantly more complex implementation. By using YARP the projects get to customize the routing and handling behavior without having to implement the http protocol.