WebAssembly for Proxies (ABI specification)

This repository contains specification of the low-level Application Binary Interface (ABI) and conventions to use between L4/L7 proxies (and/or other host environments) and their extensions delivered as WebAssembly modules.

The event-driven streaming APIs and convenient utility functions were originally developed for the WebAssembly in Envoy project, but they are proxy-agnostic, and consumers can use the same Proxy-Wasm extensions across different proxies.

Implementations

SDKs

• AssemblyScript SDK
• C++ SDK
• Go (TinyGo) SDK
• Rust SDK

Host environments

Servers

• Envoy
• Istio Proxy (Envoy-based)
• MOSN
• ATS (work-in-progress)
• OpenResty (work-in-progress)

Libraries

• C++ Host
• Go Host