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:
65b2967a92 2025-01-25 5: use anyhow::Result;
1db9dbe390 2024-11-28 6: use async_std::{
cfe321bd6f 2025-01-23 7: fs::metadata,
1db9dbe390 2024-11-28 8: io::Error,
1db9dbe390 2024-11-28 9: task,
1db9dbe390 2024-11-28 10: };
e66352b9cc 2025-01-21 11: use just_getopt::{
e66352b9cc 2025-01-21 12: OptFlags,
e66352b9cc 2025-01-21 13: OptSpecs,
e66352b9cc 2025-01-21 14: OptValueType,
e66352b9cc 2025-01-21 15: };
65b2967a92 2025-01-25 16: use lazy_static::lazy_static;
1db9dbe390 2024-11-28 17: use mailin_embedded::{
1db9dbe390 2024-11-28 18: Response,
1db9dbe390 2024-11-28 19: response::*,
1db9dbe390 2024-11-28 20: };
65b2967a92 2025-01-25 21: use regex::Regex;
f4cad2a5c0 2024-05-26 22: use teloxide::{
f4cad2a5c0 2024-05-26 23: Bot,
f4cad2a5c0 2024-05-26 24: prelude::{
f4cad2a5c0 2024-05-26 25: Requester,
f4cad2a5c0 2024-05-26 26: RequesterExt,
f4cad2a5c0 2024-05-26 27: },
f4cad2a5c0 2024-05-26 28: types::{
f4cad2a5c0 2024-05-26 29: ChatId,
866aad57a4 2024-06-15 30: InputMedia,
866aad57a4 2024-06-15 31: Message,
f4cad2a5c0 2024-05-26 32: ParseMode::MarkdownV2,
f4cad2a5c0 2024-05-26 33: },
f4cad2a5c0 2024-05-26 34: };
65b2967a92 2025-01-25 35: use thiserror::Error;
7620f854a7 2024-05-21 36:
7620f854a7 2024-05-21 37: use std::{
7620f854a7 2024-05-21 38: borrow::Cow,
61238a3618 2024-05-22 39: collections::{
61238a3618 2024-05-22 40: HashMap,
61238a3618 2024-05-22 41: HashSet,
7620f854a7 2024-05-21 42: },
cfe321bd6f 2025-01-23 43: os::unix::fs::PermissionsExt,
e66352b9cc 2025-01-21 44: path::Path,
7620f854a7 2024-05-21 45: vec::Vec,
7620f854a7 2024-05-21 46: };
65b2967a92 2025-01-25 47:
65b2967a92 2025-01-25 48: #[derive(Error, Debug)]
65b2967a92 2025-01-25 49: pub enum MyError {
65b2967a92 2025-01-25 50: #[error("Failed to parse mail")]
65b2967a92 2025-01-25 51: BadMail,
65b2967a92 2025-01-25 52: #[error("Missing default address in recipient table")]
65b2967a92 2025-01-25 53: NoDefault,
65b2967a92 2025-01-25 54: #[error("No headers found")]
65b2967a92 2025-01-25 55: NoHeaders,
65b2967a92 2025-01-25 56: #[error("No recipient addresses")]
65b2967a92 2025-01-25 57: NoRecipient,
65b2967a92 2025-01-25 58: #[error("Failed to extract text from message")]
65b2967a92 2025-01-25 59: NoText,
65b2967a92 2025-01-25 60: #[error(transparent)]
65b2967a92 2025-01-25 61: RequestError(#[from] teloxide::RequestError),
65b2967a92 2025-01-25 62: }
1db9dbe390 2024-11-28 63:
1db9dbe390 2024-11-28 64: /// `SomeHeaders` object to store data through SMTP session
1db9dbe390 2024-11-28 65: #[derive(Clone, Debug)]
1db9dbe390 2024-11-28 66: struct SomeHeaders {
1db9dbe390 2024-11-28 67: from: String,
1db9dbe390 2024-11-28 68: to: Vec<String>,
1db9dbe390 2024-11-28 69: }
1db9dbe390 2024-11-28 70:
1db9dbe390 2024-11-28 71: /// `TelegramTransport` Central object with TG api and configuration
1db9dbe390 2024-11-28 72: #[derive(Clone)]
1db9dbe390 2024-11-28 73: struct TelegramTransport {
1db9dbe390 2024-11-28 74: data: Vec<u8>,
1db9dbe390 2024-11-28 75: headers: Option<SomeHeaders>,
1db9dbe390 2024-11-28 76: recipients: HashMap<String, ChatId>,
1db9dbe390 2024-11-28 77: relay: bool,
1db9dbe390 2024-11-28 78: tg: teloxide::adaptors::DefaultParseMode<teloxide::adaptors::Throttle<Bot>>,
28fde40f7a 2024-12-27 79: fields: HashSet<String>,
65b2967a92 2025-01-25 80: }
65b2967a92 2025-01-25 81:
65b2967a92 2025-01-25 82: lazy_static! {
65b2967a92 2025-01-25 83: static ref RE_SPECIAL: Regex = Regex::new(r"([\-_*\[\]()~`>#+|{}\.!])").unwrap();
65b2967a92 2025-01-25 84: }
65b2967a92 2025-01-25 85:
65b2967a92 2025-01-25 86: /// Encodes special HTML entities to prevent them interfering with Telegram HTML
65b2967a92 2025-01-25 87: fn encode (text: &str) -> Cow<'_, str> {
65b2967a92 2025-01-25 88: RE_SPECIAL.replace_all(text, "\\$1")
65b2967a92 2025-01-25 89: }
65b2967a92 2025-01-25 90:
65b2967a92 2025-01-25 91: #[cfg(test)]
65b2967a92 2025-01-25 92: mod tests {
65b2967a92 2025-01-25 93: use crate::encode;
65b2967a92 2025-01-25 94:
65b2967a92 2025-01-25 95: #[test]
65b2967a92 2025-01-25 96: fn check_regex () {
65b2967a92 2025-01-25 97: let res = encode("-_*[]()~`>#+|{}.!");
65b2967a92 2025-01-25 98: assert_eq!(res, "\\-\\_\\*\\[\\]\\(\\)\\~\\`\\>\\#\\+\\|\\{\\}\\.\\!");
65b2967a92 2025-01-25 99: }
61238a3618 2024-05-22 100: }
61238a3618 2024-05-22 101:
61238a3618 2024-05-22 102: impl TelegramTransport {
1db9dbe390 2024-11-28 103: /// Initialize API and read configuration
1db9dbe390 2024-11-28 104: fn new(settings: config::Config) -> TelegramTransport {
f4cad2a5c0 2024-05-26 105: let tg = Bot::new(settings.get_string("api_key")
f4cad2a5c0 2024-05-26 106: .expect("[smtp2tg.toml] missing \"api_key\" parameter.\n"))
ce79786e06 2024-06-11 107: .throttle(teloxide::adaptors::throttle::Limits::default())
f4cad2a5c0 2024-05-26 108: .parse_mode(MarkdownV2);
f4cad2a5c0 2024-05-26 109: let recipients: HashMap<String, ChatId> = settings.get_table("recipients")
da7fc7983d 2024-05-23 110: .expect("[smtp2tg.toml] missing table \"recipients\".\n")
f4cad2a5c0 2024-05-26 111: .into_iter().map(|(a, b)| (a, ChatId (b.into_int()
da7fc7983d 2024-05-23 112: .expect("[smtp2tg.toml] \"recipient\" table values should be integers.\n")
da7fc7983d 2024-05-23 113: ))).collect();
da7fc7983d 2024-05-23 114: if !recipients.contains_key("_") {
da7fc7983d 2024-05-23 115: eprintln!("[smtp2tg.toml] \"recipient\" table misses \"default_recipient\".\n");
da7fc7983d 2024-05-23 116: panic!("no default recipient");
da7fc7983d 2024-05-23 117: }
28fde40f7a 2024-12-27 118: let fields = HashSet::<String>::from_iter(settings.get_array("fields")
28fde40f7a 2024-12-27 119: .expect("[smtp2tg.toml] \"fields\" should be an array")
28fde40f7a 2024-12-27 120: .iter().map(|x| x.clone().into_string().expect("should be strings")));
1db9dbe390 2024-11-28 121: let value = settings.get_string("unknown");
1db9dbe390 2024-11-28 122: let relay = match value {
1db9dbe390 2024-11-28 123: Ok(value) => {
1db9dbe390 2024-11-28 124: match value.as_str() {
1db9dbe390 2024-11-28 125: "relay" => true,
1db9dbe390 2024-11-28 126: "deny" => false,
1db9dbe390 2024-11-28 127: _ => {
1db9dbe390 2024-11-28 128: eprintln!("[smtp2tg.toml] \"unknown\" should be either \"relay\" or \"deny\".\n");
1db9dbe390 2024-11-28 129: panic!("bad setting");
1db9dbe390 2024-11-28 130: },
1db9dbe390 2024-11-28 131: }
1db9dbe390 2024-11-28 132: },
1db9dbe390 2024-11-28 133: Err(err) => {
c808d500e6 2025-03-09 134: eprintln!("[smtp2tg.toml] can't get \"unknown\":\n {err:?}\n");
1db9dbe390 2024-11-28 135: panic!("bad setting");
1db9dbe390 2024-11-28 136: },
1db9dbe390 2024-11-28 137: };
f4cad2a5c0 2024-05-26 138:
f4cad2a5c0 2024-05-26 139: TelegramTransport {
1db9dbe390 2024-11-28 140: data: vec!(),
1db9dbe390 2024-11-28 141: headers: None,
f4cad2a5c0 2024-05-26 142: recipients,
1db9dbe390 2024-11-28 143: relay,
1db9dbe390 2024-11-28 144: tg,
28fde40f7a 2024-12-27 145: fields,
f4cad2a5c0 2024-05-26 146: }
f4cad2a5c0 2024-05-26 147: }
f4cad2a5c0 2024-05-26 148:
1db9dbe390 2024-11-28 149: /// Send message to default user, used for debug/log/info purposes
c808d500e6 2025-03-09 150: async fn debug (&self, msg: &str) -> Result<Message, MyError> {
65b2967a92 2025-01-25 151: Ok(self.tg.send_message(*self.recipients.get("_").ok_or(MyError::NoDefault)?, encode(msg)).await?)
f4cad2a5c0 2024-05-26 152: }
f4cad2a5c0 2024-05-26 153:
1db9dbe390 2024-11-28 154: /// Send message to specified user
65b2967a92 2025-01-25 155: async fn send <S> (&self, to: &ChatId, msg: S) -> Result<Message, MyError>
f4cad2a5c0 2024-05-26 156: where S: Into<String> {
f4cad2a5c0 2024-05-26 157: Ok(self.tg.send_message(*to, msg).await?)
f4cad2a5c0 2024-05-26 158: }
f4cad2a5c0 2024-05-26 159:
1db9dbe390 2024-11-28 160: /// Attempt to deliver one message
65b2967a92 2025-01-25 161: async fn relay_mail (&self) -> Result<(), MyError> {
1db9dbe390 2024-11-28 162: if let Some(headers) = &self.headers {
1db9dbe390 2024-11-28 163: let mail = mail_parser::MessageParser::new().parse(&self.data)
65b2967a92 2025-01-25 164: .ok_or(MyError::BadMail)?;
1db9dbe390 2024-11-28 165:
1db9dbe390 2024-11-28 166: // Adding all known addresses to recipient list, for anyone else adding default
1db9dbe390 2024-11-28 167: // Also if list is empty also adding default
1db9dbe390 2024-11-28 168: let mut rcpt: HashSet<&ChatId> = HashSet::new();
1db9dbe390 2024-11-28 169: if headers.to.is_empty() {
65b2967a92 2025-01-25 170: return Err(MyError::NoRecipient);
1db9dbe390 2024-11-28 171: }
1db9dbe390 2024-11-28 172: for item in &headers.to {
1db9dbe390 2024-11-28 173: match self.recipients.get(item) {
1db9dbe390 2024-11-28 174: Some(addr) => rcpt.insert(addr),
1db9dbe390 2024-11-28 175: None => {
c808d500e6 2025-03-09 176: self.debug(&format!("Recipient [{item}] not found.")).await?;
1db9dbe390 2024-11-28 177: rcpt.insert(self.recipients.get("_")
65b2967a92 2025-01-25 178: .ok_or(MyError::NoDefault)?)
1db9dbe390 2024-11-28 179: }
1db9dbe390 2024-11-28 180: };
1db9dbe390 2024-11-28 181: };
1db9dbe390 2024-11-28 182: if rcpt.is_empty() {
65b2967a92 2025-01-25 183: self.debug("No recipient or envelope address.").await?;
1db9dbe390 2024-11-28 184: rcpt.insert(self.recipients.get("_")
65b2967a92 2025-01-25 185: .ok_or(MyError::NoDefault)?);
1db9dbe390 2024-11-28 186: };
1db9dbe390 2024-11-28 187:
1db9dbe390 2024-11-28 188: // prepating message header
65b2967a92 2025-01-25 189: let mut reply: Vec<String> = vec![];
28fde40f7a 2024-12-27 190: if self.fields.contains("subject") {
28fde40f7a 2024-12-27 191: if let Some(subject) = mail.subject() {
65b2967a92 2025-01-25 192: reply.push(format!("__*Subject:*__ `{}`", encode(subject)));
28fde40f7a 2024-12-27 193: } else if let Some(thread) = mail.thread_name() {
65b2967a92 2025-01-25 194: reply.push(format!("__*Thread:*__ `{}`", encode(thread)));
28fde40f7a 2024-12-27 195: }
28fde40f7a 2024-12-27 196: }
65b2967a92 2025-01-25 197: let mut short_headers: Vec<String> = vec![];
3d13e7f81d 2024-12-28 198: // do we need to replace spaces here?
28fde40f7a 2024-12-27 199: if self.fields.contains("from") {
c808d500e6 2025-03-09 200: short_headers.push(format!("__*From:*__ `{}`", encode(&headers.from)));
28fde40f7a 2024-12-27 201: }
28fde40f7a 2024-12-27 202: if self.fields.contains("date") {
28fde40f7a 2024-12-27 203: if let Some(date) = mail.date() {
c808d500e6 2025-03-09 204: short_headers.push(format!("__*Date:*__ `{date}`"));
28fde40f7a 2024-12-27 205: }
28fde40f7a 2024-12-27 206: }
65b2967a92 2025-01-25 207: reply.push(short_headers.join(" "));
3d13e7f81d 2024-12-28 208: let header_size = reply.join(" ").len() + 1;
1db9dbe390 2024-11-28 209:
1db9dbe390 2024-11-28 210: let html_parts = mail.html_body_count();
1db9dbe390 2024-11-28 211: let text_parts = mail.text_body_count();
1db9dbe390 2024-11-28 212: let attachments = mail.attachment_count();
1db9dbe390 2024-11-28 213: if html_parts != text_parts {
c808d500e6 2025-03-09 214: self.debug(&format!("Hm, we have {html_parts} HTML parts and {text_parts} text parts.")).await?;
1db9dbe390 2024-11-28 215: }
1db9dbe390 2024-11-28 216: //let mut html_num = 0;
1db9dbe390 2024-11-28 217: let mut text_num = 0;
1db9dbe390 2024-11-28 218: let mut file_num = 0;
1db9dbe390 2024-11-28 219: // let's display first html or text part as body
1db9dbe390 2024-11-28 220: let mut body = "".into();
1db9dbe390 2024-11-28 221: /*
1db9dbe390 2024-11-28 222: * actually I don't wanna parse that html stuff
1db9dbe390 2024-11-28 223: if html_parts > 0 {
1db9dbe390 2024-11-28 224: let text = mail.body_html(0).unwrap();
1db9dbe390 2024-11-28 225: if text.len() < 4096 - header_size {
1db9dbe390 2024-11-28 226: body = text;
1db9dbe390 2024-11-28 227: html_num = 1;
1db9dbe390 2024-11-28 228: }
1db9dbe390 2024-11-28 229: };
1db9dbe390 2024-11-28 230: */
1db9dbe390 2024-11-28 231: if body == "" && text_parts > 0 {
1db9dbe390 2024-11-28 232: let text = mail.body_text(0)
65b2967a92 2025-01-25 233: .ok_or(MyError::NoText)?;
1db9dbe390 2024-11-28 234: if text.len() < 4096 - header_size {
1db9dbe390 2024-11-28 235: body = text;
1db9dbe390 2024-11-28 236: text_num = 1;
1db9dbe390 2024-11-28 237: }
1db9dbe390 2024-11-28 238: };
1db9dbe390 2024-11-28 239: reply.push("```".into());
1db9dbe390 2024-11-28 240: reply.extend(body.lines().map(|x| x.into()));
1db9dbe390 2024-11-28 241: reply.push("```".into());
1db9dbe390 2024-11-28 242:
1db9dbe390 2024-11-28 243: // and let's collect all other attachment parts
1db9dbe390 2024-11-28 244: let mut files_to_send = vec![];
1db9dbe390 2024-11-28 245: /*
1db9dbe390 2024-11-28 246: * let's just skip html parts for now, they just duplicate text?
1db9dbe390 2024-11-28 247: while html_num < html_parts {
1db9dbe390 2024-11-28 248: files_to_send.push(mail.html_part(html_num).unwrap());
1db9dbe390 2024-11-28 249: html_num += 1;
1db9dbe390 2024-11-28 250: }
1db9dbe390 2024-11-28 251: */
1db9dbe390 2024-11-28 252: while text_num < text_parts {
1db9dbe390 2024-11-28 253: files_to_send.push(mail.text_part(text_num)
65b2967a92 2025-01-25 254: .ok_or(MyError::NoText)?);
1db9dbe390 2024-11-28 255: text_num += 1;
1db9dbe390 2024-11-28 256: }
1db9dbe390 2024-11-28 257: while file_num < attachments {
1db9dbe390 2024-11-28 258: files_to_send.push(mail.attachment(file_num)
65b2967a92 2025-01-25 259: .ok_or(MyError::NoText)?);
1db9dbe390 2024-11-28 260: file_num += 1;
1db9dbe390 2024-11-28 261: }
1db9dbe390 2024-11-28 262:
1db9dbe390 2024-11-28 263: let msg = reply.join("\n");
1db9dbe390 2024-11-28 264: for chat in rcpt {
1db9dbe390 2024-11-28 265: if !files_to_send.is_empty() {
1db9dbe390 2024-11-28 266: let mut files = vec![];
1db9dbe390 2024-11-28 267: let mut first_one = true;
1db9dbe390 2024-11-28 268: for chunk in &files_to_send {
1db9dbe390 2024-11-28 269: let data = chunk.contents();
1db9dbe390 2024-11-28 270: let mut filename: Option<String> = None;
1db9dbe390 2024-11-28 271: for header in chunk.headers() {
1db9dbe390 2024-11-28 272: if header.name() == "Content-Type" {
1db9dbe390 2024-11-28 273: match header.value() {
1db9dbe390 2024-11-28 274: mail_parser::HeaderValue::ContentType(contenttype) => {
1db9dbe390 2024-11-28 275: if let Some(fname) = contenttype.attribute("name") {
1db9dbe390 2024-11-28 276: filename = Some(fname.to_owned());
1db9dbe390 2024-11-28 277: }
1db9dbe390 2024-11-28 278: },
1db9dbe390 2024-11-28 279: _ => {
65b2967a92 2025-01-25 280: self.debug("Attachment has bad ContentType header.").await?;
1db9dbe390 2024-11-28 281: },
1db9dbe390 2024-11-28 282: };
1db9dbe390 2024-11-28 283: };
1db9dbe390 2024-11-28 284: };
1db9dbe390 2024-11-28 285: let filename = if let Some(fname) = filename {
1db9dbe390 2024-11-28 286: fname
1db9dbe390 2024-11-28 287: } else {
1db9dbe390 2024-11-28 288: "Attachment.txt".into()
1db9dbe390 2024-11-28 289: };
1db9dbe390 2024-11-28 290: let item = teloxide::types::InputMediaDocument::new(
1db9dbe390 2024-11-28 291: teloxide::types::InputFile::memory(data.to_vec())
1db9dbe390 2024-11-28 292: .file_name(filename));
1db9dbe390 2024-11-28 293: let item = if first_one {
1db9dbe390 2024-11-28 294: first_one = false;
65b2967a92 2025-01-25 295: item.caption(&msg)
1db9dbe390 2024-11-28 296: } else {
1db9dbe390 2024-11-28 297: item
1db9dbe390 2024-11-28 298: };
1db9dbe390 2024-11-28 299: files.push(InputMedia::Document(item));
1db9dbe390 2024-11-28 300: }
1db9dbe390 2024-11-28 301: self.sendgroup(chat, files).await?;
1db9dbe390 2024-11-28 302: } else {
1db9dbe390 2024-11-28 303: self.send(chat, &msg).await?;
1db9dbe390 2024-11-28 304: }
1db9dbe390 2024-11-28 305: }
1db9dbe390 2024-11-28 306: } else {
65b2967a92 2025-01-25 307: return Err(MyError::NoHeaders);
1db9dbe390 2024-11-28 308: }
1db9dbe390 2024-11-28 309: Ok(())
1db9dbe390 2024-11-28 310: }
1db9dbe390 2024-11-28 311:
1db9dbe390 2024-11-28 312: /// Send media to specified user
65b2967a92 2025-01-25 313: pub async fn sendgroup <M> (&self, to: &ChatId, media: M) -> Result<Vec<Message>, MyError>
866aad57a4 2024-06-15 314: where M: IntoIterator<Item = InputMedia> {
f4cad2a5c0 2024-05-26 315: Ok(self.tg.send_media_group(*to, media).await?)
f4cad2a5c0 2024-05-26 316: }
f4cad2a5c0 2024-05-26 317: }
f4cad2a5c0 2024-05-26 318:
1db9dbe390 2024-11-28 319: impl mailin_embedded::Handler for TelegramTransport {
1db9dbe390 2024-11-28 320: /// Just deny login auth
1db9dbe390 2024-11-28 321: fn auth_login (&mut self, _username: &str, _password: &str) -> Response {
1db9dbe390 2024-11-28 322: INVALID_CREDENTIALS
1db9dbe390 2024-11-28 323: }
1db9dbe390 2024-11-28 324:
1db9dbe390 2024-11-28 325: /// Just deny plain auth
1db9dbe390 2024-11-28 326: fn auth_plain (&mut self, _authorization_id: &str, _authentication_id: &str, _password: &str) -> Response {
1db9dbe390 2024-11-28 327: INVALID_CREDENTIALS
1db9dbe390 2024-11-28 328: }
1db9dbe390 2024-11-28 329:
1db9dbe390 2024-11-28 330: /// Verify whether address is deliverable
1db9dbe390 2024-11-28 331: fn rcpt (&mut self, to: &str) -> Response {
1db9dbe390 2024-11-28 332: if self.relay {
1db9dbe390 2024-11-28 333: OK
1db9dbe390 2024-11-28 334: } else {
1db9dbe390 2024-11-28 335: match self.recipients.get(to) {
1db9dbe390 2024-11-28 336: Some(_) => OK,
1db9dbe390 2024-11-28 337: None => {
1db9dbe390 2024-11-28 338: if self.relay {
1db9dbe390 2024-11-28 339: OK
1db9dbe390 2024-11-28 340: } else {
1db9dbe390 2024-11-28 341: NO_MAILBOX
1db9dbe390 2024-11-28 342: }
1db9dbe390 2024-11-28 343: }
1db9dbe390 2024-11-28 344: }
1db9dbe390 2024-11-28 345: }
1db9dbe390 2024-11-28 346: }
1db9dbe390 2024-11-28 347:
1db9dbe390 2024-11-28 348: /// Save headers we need
1db9dbe390 2024-11-28 349: fn data_start (&mut self, _domain: &str, from: &str, _is8bit: bool, to: &[String]) -> Response {
1db9dbe390 2024-11-28 350: self.headers = Some(SomeHeaders{
1db9dbe390 2024-11-28 351: from: from.to_string(),
1db9dbe390 2024-11-28 352: to: to.to_vec(),
1db9dbe390 2024-11-28 353: });
1db9dbe390 2024-11-28 354: OK
1db9dbe390 2024-11-28 355: }
1db9dbe390 2024-11-28 356:
1db9dbe390 2024-11-28 357: /// Save chunk(?) of data
65b2967a92 2025-01-25 358: fn data (&mut self, buf: &[u8]) -> Result<(), Error> {
1db9dbe390 2024-11-28 359: self.data.append(buf.to_vec().as_mut());
1db9dbe390 2024-11-28 360: Ok(())
1db9dbe390 2024-11-28 361: }
1db9dbe390 2024-11-28 362:
1db9dbe390 2024-11-28 363: /// Attempt to send email, return temporary error if that fails
65b2967a92 2025-01-25 364: fn data_end (&mut self) -> Response {
1db9dbe390 2024-11-28 365: let mut result = OK;
1db9dbe390 2024-11-28 366: task::block_on(async {
1db9dbe390 2024-11-28 367: // relay mail
1db9dbe390 2024-11-28 368: if let Err(err) = self.relay_mail().await {
1db9dbe390 2024-11-28 369: result = INTERNAL_ERROR;
1db9dbe390 2024-11-28 370: // in case that fails - inform default recipient
c808d500e6 2025-03-09 371: if let Err(err) = self.debug(&format!("Sending emails failed:\n{err:?}")).await {
1db9dbe390 2024-11-28 372: // in case that also fails - write some logs and bail
c808d500e6 2025-03-09 373: eprintln!("{err:?}");
1db9dbe390 2024-11-28 374: };
1db9dbe390 2024-11-28 375: };
1db9dbe390 2024-11-28 376: });
1db9dbe390 2024-11-28 377: // clear - just in case
1db9dbe390 2024-11-28 378: self.data = vec![];
1db9dbe390 2024-11-28 379: self.headers = None;
1db9dbe390 2024-11-28 380: result
1db9dbe390 2024-11-28 381: }
1db9dbe390 2024-11-28 382: }
1db9dbe390 2024-11-28 383:
1db9dbe390 2024-11-28 384: #[async_std::main]
65b2967a92 2025-01-25 385: async fn main () -> Result<()> {
e66352b9cc 2025-01-21 386: let specs = OptSpecs::new()
e66352b9cc 2025-01-21 387: .option("help", "h", OptValueType::None)
e66352b9cc 2025-01-21 388: .option("help", "help", OptValueType::None)
e66352b9cc 2025-01-21 389: .option("config", "c", OptValueType::Required)
e66352b9cc 2025-01-21 390: .option("config", "config", OptValueType::Required)
e66352b9cc 2025-01-21 391: .flag(OptFlags::OptionsEverywhere);
e66352b9cc 2025-01-21 392: let mut args = std::env::args();
e66352b9cc 2025-01-21 393: args.next();
e66352b9cc 2025-01-21 394: let parsed = specs.getopt(args);
e66352b9cc 2025-01-21 395: for u in &parsed.unknown {
c808d500e6 2025-03-09 396: println!("Unknown option: {u}");
e66352b9cc 2025-01-21 397: }
e66352b9cc 2025-01-21 398: if !(parsed.unknown.is_empty()) || parsed.options_first("help").is_some() {
e66352b9cc 2025-01-21 399: println!("SMTP2TG v{}, (C) 2024 - 2025\n\n\
e66352b9cc 2025-01-21 400: \t-h|--help\tDisplay this help\n\
e66352b9cc 2025-01-21 401: \t-c|-config …\tSet configuration file location.",
e66352b9cc 2025-01-21 402: env!("CARGO_PKG_VERSION"));
e66352b9cc 2025-01-21 403: return Ok(());
e66352b9cc 2025-01-21 404: };
e66352b9cc 2025-01-21 405: let config_file = Path::new(if let Some(path) = parsed.options_value_last("config") {
e66352b9cc 2025-01-21 406: &path[..]
e66352b9cc 2025-01-21 407: } else {
e66352b9cc 2025-01-21 408: "smtp2tg.toml"
e66352b9cc 2025-01-21 409: });
e66352b9cc 2025-01-21 410: if !config_file.exists() {
c808d500e6 2025-03-09 411: eprintln!("Error: can't read configuration from {config_file:?}");
e66352b9cc 2025-01-21 412: std::process::exit(1);
e66352b9cc 2025-01-21 413: };
cfe321bd6f 2025-01-23 414: {
cfe321bd6f 2025-01-23 415: let meta = metadata(config_file).await?;
cfe321bd6f 2025-01-23 416: if (!0o100600 & meta.permissions().mode()) > 0 {
c808d500e6 2025-03-09 417: eprintln!("Error: other users can read or write config file {config_file:?}\n\
c808d500e6 2025-03-09 418: File permissions: {:o}", meta.permissions().mode());
cfe321bd6f 2025-01-23 419: std::process::exit(1);
cfe321bd6f 2025-01-23 420: }
cfe321bd6f 2025-01-23 421: }
1db9dbe390 2024-11-28 422: let settings: config::Config = config::Config::builder()
28fde40f7a 2024-12-27 423: .set_default("fields", vec!["date", "from", "subject"]).unwrap()
1db9dbe390 2024-11-28 424: .set_default("hostname", "smtp.2.tg").unwrap()
28fde40f7a 2024-12-27 425: .set_default("listen_on", "0.0.0.0:1025").unwrap()
1db9dbe390 2024-11-28 426: .set_default("unknown", "relay").unwrap()
e66352b9cc 2025-01-21 427: .add_source(config::File::from(config_file))
1db9dbe390 2024-11-28 428: .build()
c808d500e6 2025-03-09 429: .unwrap_or_else(|_| panic!("[{config_file:?}] there was an error reading config\n\
c808d500e6 2025-03-09 430: \tplease consult \"smtp2tg.toml.example\" for details"));
1db9dbe390 2024-11-28 431:
1db9dbe390 2024-11-28 432: let listen_on = settings.get_string("listen_on")?;
1db9dbe390 2024-11-28 433: let server_name = settings.get_string("hostname")?;
1db9dbe390 2024-11-28 434: let core = TelegramTransport::new(settings);
1db9dbe390 2024-11-28 435: let mut server = mailin_embedded::Server::new(core);
1db9dbe390 2024-11-28 436:
1db9dbe390 2024-11-28 437: server.with_name(server_name)
1db9dbe390 2024-11-28 438: .with_ssl(mailin_embedded::SslConfig::None).unwrap()
1db9dbe390 2024-11-28 439: .with_addr(listen_on).unwrap();
1db9dbe390 2024-11-28 440: server.serve().unwrap();
1db9dbe390 2024-11-28 441:
1db9dbe390 2024-11-28 442: Ok(())
7620f854a7 2024-05-21 443: }