systemprompt_api/services/server/
builder.rs

1//! Full API router construction and the global middleware stack.
2//!
3//! [`setup_api_server`] composes the route tree and applies the global layers
4//! (body limit, analytics, context, session, CORS, trailing-slash, trace and
5//! served-by headers, content negotiation, security headers) in the order they
6//! must run. Binding and serving live in [`super::startup`], which binds the
7//! listener before this router exists and swaps it in once bootstrap
8//! completes.
9//!
10//! Copyright (c) systemprompt.io — Business Source License 1.1.
11//! See <https://systemprompt.io> for licensing details.
12
13use anyhow::Result;
14use axum::Router;
15use axum::extract::DefaultBodyLimit;
16use systemprompt_runtime::AppContext;
17use systemprompt_traits::{StartupEventExt, StartupEventSender};
18
19use super::routes::configure_routes;
20use crate::services::middleware::{
21    AnalyticsMiddleware, CorsMiddleware, PublicContextMiddleware, SessionMiddleware,
22    inject_security_headers, inject_served_by, inject_trace_header, remove_trailing_slash,
23};
24
25pub use super::discovery::*;
26pub use super::health::handle_health;
27
28pub fn setup_api_server(ctx: &AppContext, events: Option<&StartupEventSender>) -> Result<Router> {
29    let rate_config = &ctx.config().rate_limits;
30
31    if rate_config.disabled
32        && let Some(tx) = events
33    {
34        tx.warning("Rate limiting disabled - development mode only");
35    }
36
37    register_artifact_scanner(ctx);
38    let router = configure_routes(ctx, events)?;
39    apply_global_middleware(router, ctx)
40}
41
42// Why: the ingest is built by the runtime, which cannot see the gateway's
43// scanner registry; the composition root closes the loop here so every tool
44// result — from any vantage point — is scanned by the installation's policy.
45fn register_artifact_scanner(ctx: &AppContext) {
46    let resolver = crate::services::gateway::policy::PolicyResolver::from_repository(
47        ctx.ai_repositories().gateway_policies.clone(),
48    );
49    ctx.artifact_ingest().register_scanner(std::sync::Arc::new(
50        crate::services::gateway::GatewayArtifactScanner::new(resolver),
51    ));
52}
53
54fn apply_global_middleware(router: Router, ctx: &AppContext) -> Result<Router> {
55    let mut router = router;
56
57    router = router.layer(DefaultBodyLimit::max(2 * 1024 * 1024));
58
59    let analytics_middleware = AnalyticsMiddleware::new(ctx)?;
60    router = router.layer(axum::middleware::from_fn({
61        let middleware = analytics_middleware;
62        move |req, next| {
63            let middleware = middleware.clone();
64            async move { middleware.track_request(req, next).await }
65        }
66    }));
67
68    let global_context_middleware = PublicContextMiddleware::new();
69    router = router.layer(axum::middleware::from_fn({
70        let middleware = global_context_middleware;
71        move |req, next| async move { middleware.seed(req, next).await }
72    }));
73
74    let session_middleware = SessionMiddleware::new(ctx);
75    router = router.layer(axum::middleware::from_fn({
76        let middleware = session_middleware;
77        move |req, next| {
78            let middleware = middleware.clone();
79            async move { middleware.handle(req, next).await }
80        }
81    }));
82
83    let cors = CorsMiddleware::build_layer(ctx.config())?;
84    router = router.layer(cors);
85
86    router = router.layer(axum::middleware::from_fn(remove_trailing_slash));
87
88    router = router.layer(axum::middleware::from_fn(inject_trace_header));
89
90    router = router.layer(axum::middleware::from_fn(inject_served_by));
91
92    if ctx.config().content_negotiation.enabled {
93        router = router.layer(axum::middleware::from_fn(
94            crate::services::middleware::content_negotiation_middleware,
95        ));
96    }
97
98    if ctx.config().security_headers.enabled {
99        let security_config = ctx.config().security_headers.clone();
100        router = router.layer(axum::middleware::from_fn(move |req, next| {
101            let config = security_config.clone();
102            inject_security_headers(config, req, next)
103        }));
104    }
105
106    Ok(router)
107}
systemprompt_api/services/server/builder.rs

systemprompt_api/services/server/
builder.rs
