aerogramme/src/server.rs

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3.2 KiB
Rust
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use std::io::Write;
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use std::path::PathBuf;
use std::sync::Arc;
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use anyhow::Result;
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use futures::try_join;
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use log::*;
use tokio::sync::watch;
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use crate::config::*;
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use crate::imap;
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use crate::lmtp::*;
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use crate::login::ArcLoginProvider;
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use crate::login::{demo_provider::*, ldap_provider::*, static_provider::*};
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pub struct Server {
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lmtp_server: Option<Arc<LmtpServer>>,
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imap_server: Option<imap::Server>,
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pid_file: Option<PathBuf>,
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}
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impl Server {
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pub async fn from_companion_config(config: CompanionConfig) -> Result<Self> {
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tracing::info!("Init as companion");
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let login = Arc::new(StaticLoginProvider::new(config.users).await?);
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let lmtp_server = None;
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let imap_server = Some(imap::new(config.imap, login.clone()).await?);
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Ok(Self {
lmtp_server,
imap_server,
pid_file: config.pid,
})
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}
pub async fn from_provider_config(config: ProviderConfig) -> Result<Self> {
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tracing::info!("Init as provider");
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let login: ArcLoginProvider = match config.users {
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UserManagement::Demo => Arc::new(DemoLoginProvider::new()),
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UserManagement::Static(x) => Arc::new(StaticLoginProvider::new(x).await?),
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UserManagement::Ldap(x) => Arc::new(LdapLoginProvider::new(x)?),
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};
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let lmtp_server = Some(LmtpServer::new(config.lmtp, login.clone()));
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let imap_server = Some(imap::new(config.imap, login.clone()).await?);
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Ok(Self {
lmtp_server,
imap_server,
pid_file: config.pid,
})
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}
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pub async fn run(self) -> Result<()> {
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let pid = std::process::id();
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tracing::info!(pid = pid, "Starting main loops");
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// write the pid file
if let Some(pid_file) = self.pid_file {
let mut file = std::fs::OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(pid_file)?;
file.write_all(pid.to_string().as_bytes())?;
drop(file);
}
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let (exit_signal, provoke_exit) = watch_ctrl_c();
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let _exit_on_err = move |err: anyhow::Error| {
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error!("Error: {}", err);
let _ = provoke_exit.send(true);
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};
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try_join!(
async {
match self.lmtp_server.as_ref() {
None => Ok(()),
Some(s) => s.run(exit_signal.clone()).await,
}
},
async {
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match self.imap_server {
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None => Ok(()),
Some(s) => s.run(exit_signal.clone()).await,
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}
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}
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)?;
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Ok(())
}
}
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pub fn watch_ctrl_c() -> (watch::Receiver<bool>, Arc<watch::Sender<bool>>) {
let (send_cancel, watch_cancel) = watch::channel(false);
let send_cancel = Arc::new(send_cancel);
let send_cancel_2 = send_cancel.clone();
tokio::spawn(async move {
tokio::signal::ctrl_c()
.await
.expect("failed to install CTRL+C signal handler");
info!("Received CTRL+C, shutting down.");
send_cancel.send(true).unwrap();
});
(watch_cancel, send_cancel_2)
}