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    let router = configure_routes(ctx, events)?;
38    apply_global_middleware(router, ctx)
39}
40
41fn apply_global_middleware(router: Router, ctx: &AppContext) -> Result<Router> {
42    let mut router = router;
43
44    router = router.layer(DefaultBodyLimit::max(2 * 1024 * 1024));
45
46    let analytics_middleware = AnalyticsMiddleware::new(ctx)?;
47    router = router.layer(axum::middleware::from_fn({
48        let middleware = analytics_middleware;
49        move |req, next| {
50            let middleware = middleware.clone();
51            async move { middleware.track_request(req, next).await }
52        }
53    }));
54
55    let global_context_middleware = PublicContextMiddleware::new();
56    router = router.layer(axum::middleware::from_fn({
57        let middleware = global_context_middleware;
58        move |req, next| async move { middleware.handle(req, next).await }
59    }));
60
61    let session_middleware = SessionMiddleware::new(ctx)?;
62    router = router.layer(axum::middleware::from_fn({
63        let middleware = session_middleware;
64        move |req, next| {
65            let middleware = middleware.clone();
66            async move { middleware.handle(req, next).await }
67        }
68    }));
69
70    let cors = CorsMiddleware::build_layer(ctx.config())?;
71    router = router.layer(cors);
72
73    router = router.layer(axum::middleware::from_fn(remove_trailing_slash));
74
75    router = router.layer(axum::middleware::from_fn(inject_trace_header));
76
77    router = router.layer(axum::middleware::from_fn(inject_served_by));
78
79    if ctx.config().content_negotiation.enabled {
80        router = router.layer(axum::middleware::from_fn(
81            crate::services::middleware::content_negotiation_middleware,
82        ));
83    }
84
85    if ctx.config().security_headers.enabled {
86        let security_config = ctx.config().security_headers.clone();
87        router = router.layer(axum::middleware::from_fn(move |req, next| {
88            let config = security_config.clone();
89            inject_security_headers(config, req, next)
90        }));
91    }
92
93    Ok(router)
94}
systemprompt_api/services/server/builder.rs

systemprompt_api/services/server/
builder.rs
