1db9dbe390 2024-11-28 1: //! Simple SMTP-to-Telegram gateway. Can parse email and send them as telegram
1db9dbe390 2024-11-28 2: //! messages to specified chats, generally you specify which email address is
1db9dbe390 2024-11-28 3: //! available in configuration, everything else is sent to default address.
1db9dbe390 2024-11-28 4:
f5ed284f8c 2025-06-21 5: mod mail;
f5ed284f8c 2025-06-21 6: mod telegram;
f5ed284f8c 2025-06-21 7: mod utils;
f5ed284f8c 2025-06-21 8:
f5ed284f8c 2025-06-21 9: #[cfg(test)]
f5ed284f8c 2025-06-21 10: mod tests;
f5ed284f8c 2025-06-21 11:
f5ed284f8c 2025-06-21 12: use crate::mail::MailServer;
f5ed284f8c 2025-06-21 13:
a044f68fa7 2025-08-23 14: use async_std::fs::metadata;
e66352b9cc 2025-01-21 15: use just_getopt::{
e66352b9cc 2025-01-21 16: OptFlags,
e66352b9cc 2025-01-21 17: OptSpecs,
6887d3b7f9 2025-06-05 18: OptValue,
a044f68fa7 2025-08-23 19: };
a044f68fa7 2025-08-23 20: use stacked_errors::{
a044f68fa7 2025-08-23 21: Result,
a044f68fa7 2025-08-23 22: StackableErr,
a044f68fa7 2025-08-23 23: bail,
f5ed284f8c 2025-06-21 24: };
7620f854a7 2024-05-21 25:
7620f854a7 2024-05-21 26: use std::{
d96b1b4710 2025-06-11 27: io::Cursor,
65b2967a92 2025-01-25 28: os::unix::fs::PermissionsExt,
65b2967a92 2025-01-25 29: path::Path,
f5ed284f8c 2025-06-21 30: };
65b2967a92 2025-01-25 31:
65b2967a92 2025-01-25 32: #[async_std::main]
65b2967a92 2025-01-25 33: async fn main () -> Result<()> {
65b2967a92 2025-01-25 34: let specs = OptSpecs::new()
6887d3b7f9 2025-06-05 35: .option("help", "h", OptValue::None)
6887d3b7f9 2025-06-05 36: .option("help", "help", OptValue::None)
6887d3b7f9 2025-06-05 37: .option("config", "c", OptValue::Required)
6887d3b7f9 2025-06-05 38: .option("config", "config", OptValue::Required)
e66352b9cc 2025-01-21 39: .flag(OptFlags::OptionsEverywhere);
e66352b9cc 2025-01-21 40: let mut args = std::env::args();
e66352b9cc 2025-01-21 41: args.next();
e66352b9cc 2025-01-21 42: let parsed = specs.getopt(args);
e66352b9cc 2025-01-21 43: for u in &parsed.unknown {
c808d500e6 2025-03-09 44: println!("Unknown option: {u}");
e66352b9cc 2025-01-21 45: }
e66352b9cc 2025-01-21 46: if !(parsed.unknown.is_empty()) || parsed.options_first("help").is_some() {
e66352b9cc 2025-01-21 47: println!("SMTP2TG v{}, (C) 2024 - 2025\n\n\
e66352b9cc 2025-01-21 48: \t-h|--help\tDisplay this help\n\
f5ed284f8c 2025-06-21 49: \t-c|--config …\tSet configuration file location.",
e66352b9cc 2025-01-21 50: env!("CARGO_PKG_VERSION"));
e66352b9cc 2025-01-21 51: return Ok(());
e66352b9cc 2025-01-21 52: };
e66352b9cc 2025-01-21 53: let config_file = Path::new(if let Some(path) = parsed.options_value_last("config") {
e66352b9cc 2025-01-21 54: &path[..]
e66352b9cc 2025-01-21 55: } else {
e66352b9cc 2025-01-21 56: "smtp2tg.toml"
e66352b9cc 2025-01-21 57: });
e66352b9cc 2025-01-21 58: if !config_file.exists() {
f5ed284f8c 2025-06-21 59: bail!("can't read configuration from {config_file:?}");
e66352b9cc 2025-01-21 60: };
cfe321bd6f 2025-01-23 61: {
a044f68fa7 2025-08-23 62: let meta = metadata(config_file).await.stack()?;
cfe321bd6f 2025-01-23 63: if (!0o100600 & meta.permissions().mode()) > 0 {
f5ed284f8c 2025-06-21 64: bail!("other users can read or write config file {config_file:?}\n\
c808d500e6 2025-03-09 65: File permissions: {:o}", meta.permissions().mode());
cfe321bd6f 2025-01-23 66: }
cfe321bd6f 2025-01-23 67: }
e66352b9cc 2025-01-21 68: let settings: config::Config = config::Config::builder()
a044f68fa7 2025-08-23 69: .set_default("fields", vec!["date", "from", "subject"]).stack()?
a044f68fa7 2025-08-23 70: .set_default("hostname", "smtp.2.tg").stack()?
a044f68fa7 2025-08-23 71: .set_default("listen_on", "0.0.0.0:1025").stack()?
a044f68fa7 2025-08-23 72: .set_default("unknown", "relay").stack()?
a044f68fa7 2025-08-23 73: .set_default("domains", vec!["localhost", hostname::get().stack()?.to_str().expect("Failed to get current hostname")]).stack()?
e66352b9cc 2025-01-21 74: .add_source(config::File::from(config_file))
e66352b9cc 2025-01-21 75: .build()
f5ed284f8c 2025-06-21 76: .with_context(|| format!("[{config_file:?}] there was an error reading config\n\
f5ed284f8c 2025-06-21 77: \tplease consult \"smtp2tg.toml.example\" for details"))?;
e66352b9cc 2025-01-21 78:
a044f68fa7 2025-08-23 79: let listen_on = settings.get_string("listen_on").stack()?;
a044f68fa7 2025-08-23 80: let server_name = settings.get_string("hostname").stack()?;
f5ed284f8c 2025-06-21 81: let core = MailServer::new(settings)?;
1db9dbe390 2024-11-28 82: let mut server = mailin_embedded::Server::new(core);
1db9dbe390 2024-11-28 83:
1db9dbe390 2024-11-28 84: server.with_name(server_name)
1db9dbe390 2024-11-28 85: .with_ssl(mailin_embedded::SslConfig::None).unwrap()
1db9dbe390 2024-11-28 86: .with_addr(listen_on).unwrap();
1db9dbe390 2024-11-28 87: server.serve().unwrap();
1db9dbe390 2024-11-28 88:
1db9dbe390 2024-11-28 89: Ok(())
7620f854a7 2024-05-21 90: }