From 606620ae6a64b2b9b4a4b67bcf61a89d3373d67a Mon Sep 17 00:00:00 2001 From: Edward Shen Date: Sat, 21 Dec 2019 14:04:13 -0500 Subject: [PATCH] implement config file watching --- Cargo.lock | 149 +++++++++++++++++++++++++++++++++++++++++++--------- Cargo.toml | 1 + src/main.rs | 74 +++++++++++++------------- 3 files changed, 163 insertions(+), 61 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 81152db..c5ed7cc 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -50,7 +50,7 @@ dependencies = [ "copyless 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)", "derive_more 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)", "either 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)", - "encoding_rs 0.8.20 (registry+https://github.com/rust-lang/crates.io-index)", + "encoding_rs 0.8.22 (registry+https://github.com/rust-lang/crates.io-index)", "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)", "flate2 1.0.13 (registry+https://github.com/rust-lang/crates.io-index)", "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)", @@ -66,7 +66,7 @@ dependencies = [ "percent-encoding 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)", "rand 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)", "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)", - "serde 1.0.103 (registry+https://github.com/rust-lang/crates.io-index)", + "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)", "serde_json 1.0.44 (registry+https://github.com/rust-lang/crates.io-index)", "serde_urlencoded 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)", "sha1 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)", @@ -87,7 +87,7 @@ dependencies = [ "http 0.1.21 (registry+https://github.com/rust-lang/crates.io-index)", "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)", "regex 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)", - "serde 1.0.103 (registry+https://github.com/rust-lang/crates.io-index)", + "serde 1.0.104 (registry+https://github.com/rust-lang/crates.io-index)", "string 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)", ] @@ -208,7 +208,7 @@ dependencies = [ "awc 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)", "bytes 0.4.12 (registry+https://github.com/rust-lang/crates.io-index)", "derive_more 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)", - "encoding_rs 0.8.20 (registry+https://github.com/rust-lang/crates.io-index)", + "encoding_rs 0.8.22 (registry+https://github.com/rust-lang/crates.io-index)", "futures 0.1.29 (registry+https://github.com/rust-lang/crates.io-index)", "hashbrown 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)", "log 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)", @@ -216,7 +216,7 @@ dependencies = [ "net2 0.2.33 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= "2.0" +hotwatch = "0.4.3" [profile.release] lto = true diff --git a/src/main.rs b/src/main.rs index f6cc53d..c393b07 100644 --- a/src/main.rs +++ b/src/main.rs @@ -5,24 +5,21 @@ use actix_web::{ App, HttpResponse, HttpServer, Responder, }; use handlebars::Handlebars; +use hotwatch::{Event, Hotwatch}; use serde::Deserialize; use std::collections::{BTreeMap, HashMap}; use std::fs::{File, OpenOptions}; use std::io::{Error, Write}; use std::sync::{Arc, RwLock}; +use std::time::Duration; static DEFAULT_CONFIG: &[u8] = include_bytes!("../bunbun.default.toml"); static CONFIG_FILE: &str = "bunbun.toml"; #[get("/ls")] -fn list(data: Data>) -> impl Responder { - HttpResponse::Ok().body( - data.renderer - .read() - .unwrap() - .render("list", &data.routes) - .unwrap(), - ) +fn list(data: Data>>) -> impl Responder { + let data = data.read().unwrap(); + HttpResponse::Ok().body(data.renderer.render("list", &data.routes).unwrap()) } #[derive(Deserialize)] @@ -31,7 +28,8 @@ struct SearchQuery { } #[get("/hop")] -fn hop(data: Data>, query: Query) -> impl Responder { +fn hop(data: Data>>, query: Query) -> impl Responder { + let data = data.read().unwrap(); let mut raw_args = query.to.split_ascii_whitespace(); let command = raw_args.next(); @@ -57,8 +55,6 @@ fn hop(data: Data>, query: Query) -> impl Responder { .header( header::LOCATION, data.renderer - .read() - .unwrap() .render_template(template, &template_args) .unwrap(), ) @@ -77,8 +73,6 @@ fn hop(data: Data>, query: Query) -> impl Responder { .header( header::LOCATION, data.renderer - .read() - .unwrap() .render_template(data.routes.get(route).unwrap(), &template_args) .unwrap(), ) @@ -90,20 +84,16 @@ fn hop(data: Data>, query: Query) -> impl Responder { } #[get("/")] -fn index(data: Data>) -> impl Responder { +fn index(data: Data>>) -> impl Responder { + let data = data.read().unwrap(); let mut template_args = HashMap::new(); template_args.insert("hostname", &data.public_address); - HttpResponse::Ok().body( - data.renderer - .read() - .unwrap() - .render("index", &template_args) - .unwrap(), - ) + HttpResponse::Ok().body(data.renderer.render("index", &template_args).unwrap()) } #[get("/bunbunsearch.xml")] -fn opensearch(data: Data>) -> impl Responder { +fn opensearch(data: Data>>) -> impl Responder { + let data = data.read().unwrap(); let mut template_args = HashMap::new(); template_args.insert("hostname", &data.public_address); HttpResponse::Ok() @@ -111,13 +101,7 @@ fn opensearch(data: Data>) -> impl Responder { header::CONTENT_TYPE, "application/opensearchdescription+xml", ) - .body( - data.renderer - .read() - .unwrap() - .render("opensearch", &template_args) - .unwrap(), - ) + .body(data.renderer.render("opensearch", &template_args).unwrap()) } #[derive(Deserialize)] @@ -132,18 +116,18 @@ struct State { public_address: String, default_route: Option, routes: BTreeMap, - renderer: RwLock, + renderer: Handlebars, } fn main() -> Result<(), Error> { let config_file = match File::open(CONFIG_FILE) { Ok(file) => file, Err(_) => { - eprintln!("Unable to find a bunbun.toml file. Creating default!"); + eprintln!("Unable to find a {} file. Creating default!", CONFIG_FILE); let mut fd = OpenOptions::new() .write(true) .create_new(true) - .open("bunbun.toml") + .open(CONFIG_FILE) .expect("Unable to write to directory!"); fd.write_all(DEFAULT_CONFIG)?; File::open(CONFIG_FILE)? @@ -152,16 +136,34 @@ fn main() -> Result<(), Error> { let renderer = compile_templates(); let conf: Config = serde_yaml::from_reader(config_file).unwrap(); - let state = Arc::from(State { + let state = Arc::from(RwLock::new(State { public_address: conf.public_address, default_route: conf.default_route, routes: conf.routes, - renderer: RwLock::new(renderer), - }); + renderer: renderer, + })); + let state_ref = state.clone(); + + let mut watch = + Hotwatch::new_with_custom_delay(Duration::from_millis(500)).expect("Failed to init watch"); + + watch + .watch(CONFIG_FILE, move |e: Event| { + if let Event::Write(_) = e { + let config_file = File::open(CONFIG_FILE).unwrap(); + let conf: Config = serde_yaml::from_reader(config_file).unwrap(); + let state = state.clone(); + let mut state = state.write().unwrap(); + state.public_address = conf.public_address; + state.default_route = conf.default_route; + state.routes = conf.routes; + } + }) + .expect("failed to watch"); HttpServer::new(move || { App::new() - .data(state.clone()) + .data(state_ref.clone()) .service(hop) .service(list) .service(index)