Expand description
§envoy-types
Collection of protobuf types and other assets to work with the Envoy Proxy through Rust gRPC services.
Among other use cases, this crate can be used to implement an Envoy External Authorization (ExtAuthz) gRPC Server written in Rust.
Repository | Examples | Documentation
§Getting Started
§Rust Version
This project’s MSRV is 1.88.
§Dependencies
[dependencies]
envoy-types = "<envoy-types-version>"The protobuf types made available are already pre-compiled, so the latest stable Protocol Buffer
Compiler (protoc) is only needed to regenerate or check the committed generated files. Generated
code may vary across compiler versions, and the use of the latest stable version is enforced by CI.
See the protoc installation instructions.
§Examples
The example bellow covers a bare-bones implementation of an Envoy ExtAuthz gRPC
AuthorizationServer, with tonic. A more complete
implementation, including query parameters and header manipulation, can be found at the
examples directory.
use std::env;
use tonic::{transport::Server, Request, Response, Status};
use envoy_types::ext_authz::v3::pb::{
Authorization, AuthorizationServer, CheckRequest, CheckResponse,
};
use envoy_types::ext_authz::v3::{CheckRequestExt, CheckResponseExt};
#[derive(Default)]
struct MyServer;
#[tonic::async_trait]
impl Authorization for MyServer {
async fn check(
&self,
request: Request<CheckRequest>,
) -> Result<Response<CheckResponse>, Status> {
let request = request.into_inner();
let client_headers = request
.get_client_headers()
.ok_or_else(|| Status::invalid_argument("client headers not populated by envoy"))?;
let mut request_status = Status::unauthenticated("not authorized");
if let Some(authorization) = client_headers.get("authorization") {
if authorization == "Bearer valid-token" {
request_status = Status::ok("request is valid");
}
}
Ok(Response::new(CheckResponse::with_status(request_status)))
}
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
let server_port = env::var("SERVER_PORT").unwrap_or("50051".into());
let addr = format!("0.0.0.0:{server_port}").parse().unwrap();
let server = MyServer;
println!("AuthorizationServer listening on {addr}");
Server::builder()
.add_service(AuthorizationServer::new(server))
.serve(addr)
.await?;
Ok(())
}§Compatibility
The table bellow outlines the correspondence between the versions of
tonic and the compatible versions of
envoy-types.
§License
This project is licensed under the Apache License (Version 2.0).
§Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion by you, shall be licensed as Apache-2.0, without any additional terms or conditions.