now lazy fetches statuses

Cargo.lock

@@ -427,6 +427,7 @@ dependencies = [
 name = "endstat"
 version = "0.1.0"
 dependencies = [
+ "actix 0.7.9 (registry+https://github.com/rust-lang/crates.io-index)",
  "actix-web 0.7.19 (registry+https://github.com/rust-lang/crates.io-index)",
  "reqwest 0.9.15 (registry+https://github.com/rust-lang/crates.io-index)",
  "ron 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -10,3 +10,4 @@ serde = { version = "1.0.90", features = ["derive"] }
 ron = "0.5"
 actix-web = "0.7"
 tokio = "0.1"
+actix = "0.7"

src/main.rs

@@ -1,11 +1,23 @@
+extern crate actix;
+extern crate actix_web;
+extern crate reqwest;
+extern crate ron;
+extern crate serde;
+
+use actix::System;
+use actix_web::{
+    http::{Method, StatusCode},
+    server, App, HttpResponse, State,
+};
 use reqwest::{Client, Url, UrlError};
 use ron::de::from_str;
 use serde::Deserialize;
-use std::error::Error;
-use std::fs::read_to_string;
-use std::time::{Duration, Instant};
-use tokio::prelude::*;
-use tokio::timer::Interval;
+use std::{
+    error::Error,
+    fs::read_to_string,
+    sync::{Arc, Mutex},
+    time::{Duration, Instant},
+};
 
 #[derive(Deserialize, Debug, Clone)]
 struct EndpointConf {
@@ -38,29 +50,61 @@ struct Status {
     error: Option<String>,
 }
 
+struct FetchResults {
+    last_update: Instant,
+    refresh_time: u64,
+    config: Config,
+    statuses: Vec<Status>,
+}
+
+type StatusState = Arc<Mutex<FetchResults>>;
+
+fn index(state: State<StatusState>) -> HttpResponse {
+    let mut state = state.lock().unwrap();
+    let mut result = String::new();
+    if Instant::now().duration_since(state.last_update) > Duration::from_secs(state.refresh_time) {
+        result = format!(
+            "it has been {:} seconds since last update, updating",
+            Instant::now().duration_since(state.last_update).as_secs()
+        );
+        state.last_update = Instant::now();
+        state.statuses = update_status(&state.config);
+    }
+
+    let result = format!("{}\n{:?}", result, state.statuses);
+    HttpResponse::with_body(StatusCode::OK, result)
+}
+
 fn main() -> Result<(), Box<Error>> {
     let config = from_str::<Config>(&read_to_string("./endstat_conf.ron")?)?;
-    let mut statuses = update_status(config.clone());
 
-    let update_loop = Interval::new(Instant::now(), Duration::from_secs(config.refresh_time))
-        .for_each(move |_instant| {
-            statuses = update_status(config.clone());
-            Ok(())
+    println!("running server");
+    let sys = System::new("status");
+
+    let a: Arc<Mutex<FetchResults>> = Arc::from(Mutex::from(FetchResults {
+        last_update: Instant::now(),
+        refresh_time: config.refresh_time,
+        config: config.clone(),
+        statuses: update_status(&config),
+    }));
+
+    server::new(move || {
+        App::with_state(a.clone()).resource("/", |r| r.method(Method::GET).with(index))
     })
-        .map_err(|e| panic!("interval errored; err={:?}", e));
-
-    tokio::run(update_loop);
+    .bind("0.0.0.0:8080")?
+    .start();
 
+    sys.run();
     Ok(())
 }
 
-fn update_status(config: Config) -> Vec<Status> {
+fn update_status(config: &Config) -> Vec<Status> {
     let client = Client::new();
     let mut results: Vec<Status> = vec![];
 
-    for website_conf in config.websites {
-        for endpoint in website_conf.endpoints {
-            let (label, path, port, code, body) = get_endpoint_info(endpoint);
+    for website_conf in &config.websites {
+        for endpoint in &website_conf.endpoints {
+            let (label, path, port, code, body) = get_endpoint_info(endpoint.clone());
             let url = get_url(&website_conf.base, &path, port).expect("reading config");
             if let Ok(mut res) = client.get(&url).send() {
                 let res_body = res.text().expect("could not get body of request");