encoderfile 0.6.2

Distribute and run transformer encoders with a single file.
Documentation 
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use crate::{
    services::Inference,
    transport::{grpc::GrpcRouter, http::HttpRouter, mcp::McpRouter},
};
use anyhow::Result;
use axum::extract::connect_info::IntoMakeServiceWithConnectInfo;
use axum_server::tls_rustls::RustlsConfig;
use std::{net::SocketAddr, path::Path};
use tower_http::trace::DefaultOnResponse;

pub async fn run_grpc<S: Inference + GrpcRouter>(
    hostname: String,
    port: String,
    maybe_cert_file: Option<String>,
    maybe_key_file: Option<String>,
    state: S,
) -> Result<()> {
    serve_with_optional_tls(
        hostname,
        port,
        maybe_cert_file,
        maybe_key_file,
        "gRPC",
        state,
        |state| {
            state
                .clone()
                .grpc_router()
                .layer(
                    tower_http::trace::TraceLayer::new_for_grpc()
                        .on_response(DefaultOnResponse::new().level(tracing::Level::INFO)),
                )
                .into_make_service_with_connect_info::<std::net::SocketAddr>()
        },
    )
    .await
}

pub async fn run_http<S: Inference + HttpRouter>(
    hostname: String,
    port: String,
    maybe_cert_file: Option<String>,
    maybe_key_file: Option<String>,
    state: S,
) -> Result<()> {
    serve_with_optional_tls(
        hostname,
        port,
        maybe_cert_file,
        maybe_key_file,
        "HTTP",
        state,
        |state| {
            state
                .clone()
                .http_router()
                .layer(
                    tower_http::trace::TraceLayer::new_for_http()
                        .on_response(DefaultOnResponse::new().level(tracing::Level::INFO)),
                )
                .into_make_service_with_connect_info::<std::net::SocketAddr>()
        },
    )
    .await
}

pub async fn run_mcp<S: Inference + McpRouter>(
    hostname: String,
    port: String,
    maybe_cert_file: Option<String>,
    maybe_key_file: Option<String>,
    state: S,
) -> Result<()> {
    serve_with_optional_tls(
        hostname,
        port,
        maybe_cert_file,
        maybe_key_file,
        "MCP",
        state,
        |state| {
            state
                .clone()
                .mcp_router()
                .layer(
                    tower_http::trace::TraceLayer::new_for_http()
                        // TODO check if otel is enabled
                        // .make_span_with(crate::middleware::format_span)
                        .on_response(DefaultOnResponse::new().level(tracing::Level::INFO)),
                )
                .into_make_service_with_connect_info::<std::net::SocketAddr>()
        },
    )
    .await
}

async fn serve_with_optional_tls<S: Inference>(
    hostname: String,
    port: String,
    maybe_cert_file: Option<String>,
    maybe_key_file: Option<String>,
    server_type_str: &str,
    state: S,
    into_service_fn: impl Fn(&S) -> IntoMakeServiceWithConnectInfo<axum::Router, SocketAddr>,
) -> Result<()> {
    let addr = format!("{}:{}", &hostname, &port);

    let router = into_service_fn(&state);

    let model_type = state.model_type();

    match (maybe_cert_file, maybe_key_file) {
        (Some(cert), Some(key)) => {
            tracing::debug!(
                "TLS configuration: cert file: {:?}, cert key: {:?}",
                cert.as_str(),
                key.as_str()
            );

            tracing::info!(
                "Running {:?} {:?} server with TLS on {}",
                model_type,
                server_type_str,
                &addr
            );

            let config = RustlsConfig::from_pem_file(Path::new(&cert), Path::new(&key)).await?;
            let socket_addr = addr.parse()?;
            axum_server::bind_rustls(socket_addr, config)
                .serve(router)
                .await?;
        }
        (None, None) => {
            tracing::info!(
                "Running {:?} {:?} server on {}",
                model_type,
                server_type_str,
                &addr
            );
            let listener = tokio::net::TcpListener::bind(addr).await?;
            axum::serve(listener, router).await?;
        }
        _ => {
            anyhow::bail!("Both cert and key file must be set when TLS is enabled");
        }
    }

    Ok(())
}