added a lib

README.md

@@ -29,3 +29,7 @@ See [config.toml](./config.toml) for an example.
   * `answer_type`: Type of input (`text`, `number`, `email`, `password`, `url`, `tel`, `textarea`).
   * `html_before` (optional): HTML snippet rendered before the field.
   * `html_after` (optional): HTML snippet rendered after the field.
+
+## Lib
+
+This crate also provides a library so you can run the form server alongside another app.

src/lib.rs

@@ -0,0 +1,70 @@
+use std::{net::SocketAddr, sync::Arc, time::Duration};
+
+use axum::{
+    Router,
+    http::{Method, header},
+    routing::{get, post},
+};
+use tokio::sync::Mutex;
+use tower_governor::{GovernorLayer, governor::GovernorConfigBuilder};
+use tower_http::cors::{Any, CorsLayer};
+
+pub mod handlers;
+pub use handlers::{AppState, render_form, submit};
+
+pub mod config;
+pub use config::load_config;
+
+use crate::handlers::AppConfig;
+
+/// Start the server with the given configuration and output file.
+/// `addr` should be something like "127.0.0.1:8081"
+pub async fn run_server(cfg: AppConfig, output_file: String, addr: &str) -> anyhow::Result<()> {
+    // CORS
+    let cors = CorsLayer::new()
+        .allow_origin(Any)
+        .allow_methods([Method::GET, Method::POST])
+        .allow_headers([header::AUTHORIZATION, header::CONTENT_TYPE]);
+
+    // rate limiter
+    let governor_conf = GovernorConfigBuilder::default()
+        .per_second(3)
+        .burst_size(10)
+        .finish()
+        .unwrap();
+
+    // a separate background task to clean up
+    let governor_limiter = governor_conf.limiter().clone();
+    let interval = Duration::from_secs(60);
+    std::thread::spawn(move || {
+        loop {
+            std::thread::sleep(interval);
+            // tracing::info!("rate limiting storage size: {}", governor_limiter.len());
+            governor_limiter.retain_recent();
+        }
+    });
+
+    let state = AppState {
+        cfg: Arc::new(cfg),
+        file_lock: Arc::new(Mutex::new(())),
+        output_file,
+    };
+
+    let app = Router::new()
+        .route("/", get(render_form))
+        .route("/submit", post(submit))
+        .with_state(state)
+        .layer(cors)
+        .layer(GovernorLayer::new(governor_conf));
+
+    let listener = tokio::net::TcpListener::bind(addr).await?;
+    tracing::info!("Listening on {}", addr);
+
+    axum::serve(
+        listener,
+        app.into_make_service_with_connect_info::<SocketAddr>(),
+    )
+    .await?;
+
+    Ok(())
+}

src/main.rs

@@ -1,34 +1,18 @@
-use std::{net::SocketAddr, sync::Arc, time::Duration};
-
 use anyhow::Context;
-use axum::{
-    Router,
-    http::{Method, header},
-    routing::{get, post},
-};
-use tokio::sync::Mutex;
-use tower_governor::{GovernorLayer, governor::GovernorConfigBuilder};
-use tower_http::cors::{Any, CorsLayer};
-
 use clap::Parser;
 
-mod handlers;
-use handlers::{AppState, render_form, submit};
-mod config;
-use config::load_config;
+use form_generator::config::load_config;
+use form_generator::run_server;
 
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
-pub struct Cli {
-    /// Config path
+struct Cli {
     #[arg(short, long, default_value = "config.toml")]
     config_path: String,
 
-    /// Output file
     #[arg(short, long, default_value = "answers.json")]
     output_file: String,
 
-    /// Verbose mode
     #[arg(short, long)]
     verbose: bool,
 }
@@ -40,7 +24,6 @@ async fn main() -> anyhow::Result<()> {
     let subscriber = tracing_subscriber::FmtSubscriber::new();
     tracing::subscriber::set_global_default(subscriber).ok();
 
-    // load config
     let cfg = load_config(&cli.config_path).context(format!("loading {}", cli.config_path))?;
     tracing::info!(
         "Loaded config: '{}', writing answers to '{}' with {} fields",
@@ -49,55 +32,10 @@ async fn main() -> anyhow::Result<()> {
         cfg.fields.len()
     );
 
-    // CORS
-    let cors = CorsLayer::new()
-        .allow_origin(Any)
-        .allow_methods([Method::GET, Method::POST])
-        .allow_headers([header::AUTHORIZATION, header::CONTENT_TYPE]);
-
-    // rate limiter
-    let governor_conf = GovernorConfigBuilder::default()
-        .per_second(3)
-        .burst_size(10)
-        .finish()
-        .unwrap();
-
-    // a separate background task to clean up
-    let governor_limiter = governor_conf.limiter().clone();
-    let interval = Duration::from_secs(60);
-    std::thread::spawn(move || {
-        loop {
-            std::thread::sleep(interval);
-            // tracing::info!("rate limiting storage size: {}", governor_limiter.len());
-            governor_limiter.retain_recent();
-        }
-    });
-
-    let state = AppState {
-        cfg: Arc::new(cfg),
-        file_lock: Arc::new(Mutex::new(())),
-        output_file: cli.output_file.clone(),
-    };
-
-    let app = Router::new()
-        .route("/", get(render_form))
-        .route("/submit", post(submit))
-        .with_state(state)
-        .layer(cors)
-        .layer(GovernorLayer::new(governor_conf));
-
     let port = std::env::var("SERVER_PORT").unwrap_or("8081".to_string());
     let addr = format!("127.0.0.1:{port}");
 
-    let listener = tokio::net::TcpListener::bind(&addr).await.unwrap();
-    tracing::info!("Listening on {addr}");
-
-    axum::serve(
-        listener,
-        app.into_make_service_with_connect_info::<SocketAddr>(),
-    )
-    .await
-    .unwrap();
+    run_server(cfg, cli.output_file, &addr).await?;
 
     Ok(())
 }