feat: added Logger and wired it up to warp
parent
d2109fce65
commit
2aff7bb416
140
src/main.rs
140
src/main.rs
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@ -142,9 +142,9 @@ mod conf {
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/// Configuration of logging by lonk.
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pub struct LogRules {
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/// Where to write error logs to. The file will be appended to.
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error_log_file: PathBuf,
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pub error_log_file: PathBuf,
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/// Where to write access ogs to. The file will be appended to.
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access_log_file: PathBuf,
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pub access_log_file: PathBuf,
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}
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#[derive(Deserialize, Serialize, Debug, Clone)]
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@ -898,6 +898,104 @@ mod service {
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}
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}
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}
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/// Affine to logging
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pub mod log {
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use std::path::PathBuf;
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use tokio::{
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fs::OpenOptions,
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io::{AsyncWriteExt, BufWriter},
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sync,
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};
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/// A struct responsible for logging events, per messages received from
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/// other processes.
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pub struct Logger {
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access_tx: sync::mpsc::UnboundedSender<String>,
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error_tx: sync::mpsc::UnboundedSender<String>,
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}
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impl Logger {
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pub fn from_log_rules(config: &crate::conf::LogRules) -> Self {
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// Create the communication channels
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let (access_tx, access_rx) = sync::mpsc::unbounded_channel::<String>();
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let (error_tx, error_rx) = sync::mpsc::unbounded_channel::<String>();
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// Start the logging tasks
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tokio::spawn(Self::logging_task(
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access_rx,
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config.access_log_file.clone(),
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));
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tokio::spawn(Self::logging_task(error_rx, config.error_log_file.clone()));
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// Done
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Logger {
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access_tx,
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error_tx,
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}
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}
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/// Log a message into the access log file.
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///
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/// Returns a Result with empty type; if posting the log message
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/// failed for any reason, it's unlikely to recover, and the user
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/// should decide either to stop logging, ignore these errors, or
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/// halt the program.
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pub fn access(&self, msg: String) -> Result<(), ()> {
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self.access_tx.send(msg).map_err(|e| ())
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}
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/// Log a message into the error log file.
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///
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/// Returns a Result with empty type; if posting the log message
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/// failed for any reason, it's unlikely to recover, and the user
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/// should decide either to stop logging, ignore these errors, or
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/// halt the program.
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pub fn error(&self, msg: String) -> Result<(), ()> {
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self.error_tx.send(msg).map_err(|e| ())
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}
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/// The task responsible for receiving the log messages and actually
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/// writing them into the corresponding files. One task is created
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/// for each target file.
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async fn logging_task(mut rx: sync::mpsc::UnboundedReceiver<String>, into: PathBuf) {
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// Open the log file in append mode
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let file = OpenOptions::new().append(true).open(into.clone()).await;
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if let Err(e) = file {
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eprintln!(
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concat!(
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"Could not open {} for logging, with error:\n",
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"{}\n",
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"Future logging may result in errors."
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),
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into.clone().to_string_lossy(),
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e
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);
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return;
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}
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let mut file = BufWriter::new(file.unwrap());
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// Listen to the logging message channel
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while let Some(log) = rx.recv().await {
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let write_result = file.write(log.as_bytes()).await;
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if let Err(e) = write_result {
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eprintln!(
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concat!(
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"Error writing to {}!\n",
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"{}\n",
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"Continuing, but future logging may error again."
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),
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into.clone().to_string_lossy(),
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e
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)
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}
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}
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// All logging tx channels were dropped, close this task
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}
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}
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}
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}
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use service::*;
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@ -1030,6 +1128,9 @@ async fn serve() {
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}
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};
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// Create logger
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let logger = log::Logger::from_log_rules(&config.log_rules);
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// Create slug factory
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let slug_factory = slug::SlugFactory::from_rules(config.slug_rules);
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@ -1039,11 +1140,30 @@ async fn serve() {
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db::SlugDatabase::from_client(client, config.db.expire_seconds)
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};
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// We leak the slug factory and the database, because we know that these
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// will live forever, and want them to have 'static lifetime so that warp is
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// happy.
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// We leak the slug factory, the database, and the logger, because we know
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// that these will live forever, and want them to have 'static lifetime so
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// that warp is happy.
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let slug_factory: &'static slug::SlugFactory = Box::leak(Box::new(slug_factory));
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let db: &'static db::SlugDatabase = Box::leak(Box::new(db));
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let logger: &'static log::Logger = Box::leak(Box::new(logger));
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// Warp logging compatibility layer
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let log = warp::log::custom(move |info| {
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let log_msg = format!(
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"{} requested {}/{}, replied with status {}",
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info.remote_addr()
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.map(|x| x.to_string())
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.unwrap_or_else(|| "".to_string()),
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info.path(),
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info.method(),
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info.status().as_u16(),
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);
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if info.status().is_client_error() || info.status().is_server_error() {
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logger.error(log_msg).ok();
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} else {
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logger.access(log_msg).ok();
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}
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});
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// POST /shorten/ with link in argument
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let shorten = warp::post()
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@ -1064,7 +1184,8 @@ async fn serve() {
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.unwrap(),
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Err((status, message)) => Response::builder().status(status).body(message).unwrap(),
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}
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});
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})
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.with(log);
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// GET /l/:Slug
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let link = warp::path("l")
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@ -1078,12 +1199,15 @@ async fn serve() {
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.unwrap(),
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Err((status, message)) => Response::builder().status(status).body(message).unwrap(),
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}
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});
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})
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.with(log);
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// GET /
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// This should be the last thing matched, so that anything that doesn't
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// match another filter will try to match a file.
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let homepage = warp::get().and(config.serve_rules.dir.to_filter());
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let homepage = warp::get()
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.and(config.serve_rules.dir.to_filter())
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.with(log);
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let get_routes = warp::get().and(link.or(homepage));
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let post_routes = warp::post().and(shorten);
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