HTTP -> Proxy -> Router -> Middleware -> Client -> Selector -> Node

• HTTP -> HTTP
• HTTP -> gRPC
• gRPC -> gRPC

• Protobuf Schemas

• prefix: /api/echo/*
• path: /api/echo/hello
• regex: /api/echo/[a-z]+
• restful: /api/echo/{name}

• cors
• auth
• color
• logging
• tracing
• metrics
• ratelimit
• datacenter