added basic readme, api endpoint

README.md

@@ -0,0 +1,6 @@
+# endstat
+
+EndStat is an easy-to-use lazy **End**point **Stat**us checking tool, meant for
+checking the health of various web locations. It supports arbitrary domains and
+ports, status matching, and body matching using a quick-to-understand config
+file.

src/main.rs

@@ -7,11 +7,11 @@ extern crate serde;
 use actix::System;
 use actix_web::{
     http::{Method, StatusCode},
-    server, App, HttpResponse, State,
+    server, App, HttpResponse, Json, Result as WebResult, State,
 };
 use reqwest::{Client, Url, UrlError};
 use ron::de::from_str;
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 use std::{
     error::Error,
     fs::read_to_string,
@@ -41,7 +41,7 @@ struct Config {
     websites: Vec<WebsiteConf>,
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone, Serialize)]
 struct Status {
     status: u8,
     location: String,
@@ -75,6 +75,16 @@ fn index(state: State<StatusState>) -> HttpResponse {
     HttpResponse::with_body(StatusCode::OK, result)
 }
 
+fn json_endpoint(state: State<StatusState>) -> WebResult<Json<Vec<Status>>> {
+    let mut state = state.lock().unwrap();
+    if Instant::now().duration_since(state.last_update) > Duration::from_secs(state.refresh_time) {
+        state.last_update = Instant::now();
+        state.statuses = update_status(&state.config);
+    }
+
+    Ok(Json(state.statuses.clone()))
+}
+
 fn main() -> Result<(), Box<Error>> {
     let config = from_str::<Config>(&read_to_string("./endstat_conf.ron")?)?;
 
@@ -89,7 +99,9 @@ fn main() -> Result<(), Box<Error>> {
     }));
 
     server::new(move || {
-        App::with_state(a.clone()).resource("/", |r| r.method(Method::GET).with(index))
+        App::with_state(a.clone())
+            .resource("/", |r| r.get().with(index))
+            .resource("/api", |r| r.get().with(json_endpoint))
     })
     .bind("0.0.0.0:8080")?
     .start();