agent-envoy 0.2.0

Message/coordination server for AI coding agents using sqlitegraph pub/sub
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

use axum::extract::{Request, State};
use axum::http::StatusCode;
use axum::middleware::Next;
use axum::response::{IntoResponse, Response};

use crate::http::state::SharedState;

pub async fn rate_limit_middleware(
    State(state): State<SharedState>,
    request: Request,
    next: Next,
) -> Response {
    // Public endpoints: health checks, metrics, and agent registration bypass auth.
    let path = request.uri().path();
    let is_health = path == "/health" || path == "/stats" || path == "/metrics";
    let is_registration = path == "/agents" && request.method() == "POST";

    if is_health || is_registration {
        return next.run(request).await;
    }

    let agent_id = request
        .headers()
        .get("x-agent-id")
        .and_then(|v| v.to_str().ok())
        .unwrap_or("");

    if agent_id.is_empty() || !state.agent_registry.is_active(agent_id).unwrap_or(false) {
        return StatusCode::UNAUTHORIZED.into_response();
    }

    let decision = {
        let engine = state.engine.lock();
        state
            .rate_limiter
            .check_rate_limit(engine.graph(), agent_id)
    };

    if !decision.allowed {
        return StatusCode::TOO_MANY_REQUESTS.into_response();
    }

    next.run(request).await
}