Envoy Types

Collection of protobuf types and other assets to work with the [Envoy Proxy] through Rust services.

Among other use cases, this crate can be used to implement an [Envoy External Authorization] (ExtAuthz) gRPC Server written in Rust.

[Examples] | [Docs]

Getting Started

toml [dependencies] envoy-types = "<envoy-types-version>"

The protobuf types made available are already pre-compiled, so you only need to have the Protocol Buffer Compiler (protoc) installed to run the crate's tests. Installation instructions can be found here.

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.

```rust use tonic::{transport::Server, Request, Response, Status};

use envoytypes::extauthz::v3::pb::{ Authorization, AuthorizationServer, CheckRequest, CheckResponse, }; use envoytypes::extauthz::v3::{CheckRequestExt, CheckResponseExt};

[derive(Default)]

struct MyServer;

[tonic::async_trait]

impl Authorization for MyServer { async fn check( &self, request: Request, ) -> Result, 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> { let addr = format!("0.0.0.0:50051").parse().unwrap(); let server = MyServer::default();

println!("AuthorizationServer listening on {addr}");

Server::builder()
    .add_service(AuthorizationServer::new(server))
    .serve(addr)
    .await?;

Ok(())

} ```

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.