How we implemented an authorization cache for Envoy proxy

This is the second article in a two-part series about an authorization cache we developed for the Envoy open source proxy as a part of Google Summer of Code 2021. The first article in the series showed the design of our cache, based on Proxy-Wasm and integrated with Red Hat 3scale API Management. In this part, we focus on the implementation aspect of the design described in the previous article (check it out if you haven't already). Proxy-Wasm extensions As mentioned in the first part of the ser...