1db9dbe390 2024-11-28 arcade: //! Simple SMTP-to-Telegram gateway. Can parse email and send them as telegram
1db9dbe390 2024-11-28 arcade: //! messages to specified chats, generally you specify which email address is
1db9dbe390 2024-11-28 arcade: //! available in configuration, everything else is sent to default address.
1db9dbe390 2024-11-28 arcade:
65b2967a92 2025-01-25 arcade: use anyhow::Result;
1db9dbe390 2024-11-28 arcade: use async_std::{
cfe321bd6f 2025-01-23 arcade: fs::metadata,
1db9dbe390 2024-11-28 arcade: io::Error,
1db9dbe390 2024-11-28 arcade: task,
1db9dbe390 2024-11-28 arcade: };
e66352b9cc 2025-01-21 arcade: use just_getopt::{
e66352b9cc 2025-01-21 arcade: OptFlags,
e66352b9cc 2025-01-21 arcade: OptSpecs,
6887d3b7f9 2025-06-05 arcade: OptValue,
e66352b9cc 2025-01-21 arcade: };
65b2967a92 2025-01-25 arcade: use lazy_static::lazy_static;
1db9dbe390 2024-11-28 arcade: use mailin_embedded::{
1db9dbe390 2024-11-28 arcade: Response,
1db9dbe390 2024-11-28 arcade: response::*,
1db9dbe390 2024-11-28 arcade: };
2158b44929 2025-06-12 arcade: use regex::{
2158b44929 2025-06-12 arcade: Regex,
2158b44929 2025-06-12 arcade: escape,
2158b44929 2025-06-12 arcade: };
d96b1b4710 2025-06-11 arcade: use tgbot::{
d96b1b4710 2025-06-11 arcade: api::Client,
1db9dbe390 2024-11-28 arcade: types::{
d96b1b4710 2025-06-11 arcade: ChatPeerId,
d96b1b4710 2025-06-11 arcade: InputFile,
d96b1b4710 2025-06-11 arcade: InputFileReader,
d96b1b4710 2025-06-11 arcade: InputMediaDocument,
d96b1b4710 2025-06-11 arcade: MediaGroup,
d96b1b4710 2025-06-11 arcade: MediaGroupItem,
866aad57a4 2024-06-15 arcade: Message,
866aad57a4 2024-06-15 arcade: ParseMode::MarkdownV2,
d96b1b4710 2025-06-11 arcade: SendDocument,
d96b1b4710 2025-06-11 arcade: SendMediaGroup,
d96b1b4710 2025-06-11 arcade: SendMessage,
866aad57a4 2024-06-15 arcade: },
866aad57a4 2024-06-15 arcade: };
65b2967a92 2025-01-25 arcade: use thiserror::Error;
7620f854a7 2024-05-21 arcade:
7620f854a7 2024-05-21 arcade: use std::{
7620f854a7 2024-05-21 arcade: borrow::Cow,
61238a3618 2024-05-22 arcade: collections::{
61238a3618 2024-05-22 arcade: HashMap,
61238a3618 2024-05-22 arcade: HashSet,
7620f854a7 2024-05-21 arcade: },
d96b1b4710 2025-06-11 arcade: io::Cursor,
cfe321bd6f 2025-01-23 arcade: os::unix::fs::PermissionsExt,
e66352b9cc 2025-01-21 arcade: path::Path,
7620f854a7 2024-05-21 arcade: vec::Vec,
7620f854a7 2024-05-21 arcade: };
65b2967a92 2025-01-25 arcade:
65b2967a92 2025-01-25 arcade: #[derive(Error, Debug)]
65b2967a92 2025-01-25 arcade: pub enum MyError {
65b2967a92 2025-01-25 arcade: #[error("Failed to parse mail")]
65b2967a92 2025-01-25 arcade: BadMail,
65b2967a92 2025-01-25 arcade: #[error("Missing default address in recipient table")]
65b2967a92 2025-01-25 arcade: NoDefault,
65b2967a92 2025-01-25 arcade: #[error("No headers found")]
65b2967a92 2025-01-25 arcade: NoHeaders,
65b2967a92 2025-01-25 arcade: #[error("No recipient addresses")]
65b2967a92 2025-01-25 arcade: NoRecipient,
65b2967a92 2025-01-25 arcade: #[error("Failed to extract text from message")]
65b2967a92 2025-01-25 arcade: NoText,
65b2967a92 2025-01-25 arcade: #[error(transparent)]
d96b1b4710 2025-06-11 arcade: RequestError(#[from] tgbot::api::ExecuteError),
6887d3b7f9 2025-06-05 arcade: #[error(transparent)]
6887d3b7f9 2025-06-05 arcade: TryFromIntError(#[from] std::num::TryFromIntError),
d96b1b4710 2025-06-11 arcade: #[error(transparent)]
d96b1b4710 2025-06-11 arcade: InputMediaError(#[from] tgbot::types::InputMediaError),
d96b1b4710 2025-06-11 arcade: #[error(transparent)]
d96b1b4710 2025-06-11 arcade: MediaGroupError(#[from] tgbot::types::MediaGroupError),
65b2967a92 2025-01-25 arcade: }
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: /// `SomeHeaders` object to store data through SMTP session
1db9dbe390 2024-11-28 arcade: #[derive(Clone, Debug)]
1db9dbe390 2024-11-28 arcade: struct SomeHeaders {
1db9dbe390 2024-11-28 arcade: from: String,
1db9dbe390 2024-11-28 arcade: to: Vec<String>,
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade:
d96b1b4710 2025-06-11 arcade: struct Attachment {
d96b1b4710 2025-06-11 arcade: data: Cursor<Vec<u8>>,
d96b1b4710 2025-06-11 arcade: name: String,
d96b1b4710 2025-06-11 arcade: }
d96b1b4710 2025-06-11 arcade:
1db9dbe390 2024-11-28 arcade: /// `TelegramTransport` Central object with TG api and configuration
1db9dbe390 2024-11-28 arcade: #[derive(Clone)]
1db9dbe390 2024-11-28 arcade: struct TelegramTransport {
1db9dbe390 2024-11-28 arcade: data: Vec<u8>,
1db9dbe390 2024-11-28 arcade: headers: Option<SomeHeaders>,
d96b1b4710 2025-06-11 arcade: recipients: HashMap<String, ChatPeerId>,
1db9dbe390 2024-11-28 arcade: relay: bool,
d96b1b4710 2025-06-11 arcade: tg: Client,
28fde40f7a 2024-12-27 arcade: fields: HashSet<String>,
2158b44929 2025-06-12 arcade: address: Regex,
65b2967a92 2025-01-25 arcade: }
65b2967a92 2025-01-25 arcade:
65b2967a92 2025-01-25 arcade: lazy_static! {
65b2967a92 2025-01-25 arcade: static ref RE_SPECIAL: Regex = Regex::new(r"([\-_*\[\]()~`>#+|{}\.!])").unwrap();
2158b44929 2025-06-12 arcade: static ref RE_DOMAIN: Regex = Regex::new(r"^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$").unwrap();
65b2967a92 2025-01-25 arcade: }
65b2967a92 2025-01-25 arcade:
65b2967a92 2025-01-25 arcade: /// Encodes special HTML entities to prevent them interfering with Telegram HTML
65b2967a92 2025-01-25 arcade: fn encode (text: &str) -> Cow<'_, str> {
65b2967a92 2025-01-25 arcade: RE_SPECIAL.replace_all(text, "\\$1")
65b2967a92 2025-01-25 arcade: }
65b2967a92 2025-01-25 arcade:
65b2967a92 2025-01-25 arcade: #[cfg(test)]
65b2967a92 2025-01-25 arcade: mod tests {
65b2967a92 2025-01-25 arcade: use crate::encode;
65b2967a92 2025-01-25 arcade:
65b2967a92 2025-01-25 arcade: #[test]
65b2967a92 2025-01-25 arcade: fn check_regex () {
65b2967a92 2025-01-25 arcade: let res = encode("-_*[]()~`>#+|{}.!");
65b2967a92 2025-01-25 arcade: assert_eq!(res, "\\-\\_\\*\\[\\]\\(\\)\\~\\`\\>\\#\\+\\|\\{\\}\\.\\!");
65b2967a92 2025-01-25 arcade: }
da7fc7983d 2024-05-23 arcade: }
da7fc7983d 2024-05-23 arcade:
da7fc7983d 2024-05-23 arcade: impl TelegramTransport {
1db9dbe390 2024-11-28 arcade: /// Initialize API and read configuration
1db9dbe390 2024-11-28 arcade: fn new(settings: config::Config) -> TelegramTransport {
d96b1b4710 2025-06-11 arcade: let tg = Client::new(settings.get_string("api_key")
f4cad2a5c0 2024-05-26 arcade: .expect("[smtp2tg.toml] missing \"api_key\" parameter.\n"))
d96b1b4710 2025-06-11 arcade: .expect("Failed to create API.\n");
d96b1b4710 2025-06-11 arcade: let recipients: HashMap<String, ChatPeerId> = settings.get_table("recipients")
da7fc7983d 2024-05-23 arcade: .expect("[smtp2tg.toml] missing table \"recipients\".\n")
d96b1b4710 2025-06-11 arcade: .into_iter().map(|(a, b)| (a, ChatPeerId::from(b.into_int()
da7fc7983d 2024-05-23 arcade: .expect("[smtp2tg.toml] \"recipient\" table values should be integers.\n")
da7fc7983d 2024-05-23 arcade: ))).collect();
da7fc7983d 2024-05-23 arcade: if !recipients.contains_key("_") {
da7fc7983d 2024-05-23 arcade: eprintln!("[smtp2tg.toml] \"recipient\" table misses \"default_recipient\".\n");
da7fc7983d 2024-05-23 arcade: panic!("no default recipient");
da7fc7983d 2024-05-23 arcade: }
28fde40f7a 2024-12-27 arcade: let fields = HashSet::<String>::from_iter(settings.get_array("fields")
28fde40f7a 2024-12-27 arcade: .expect("[smtp2tg.toml] \"fields\" should be an array")
28fde40f7a 2024-12-27 arcade: .iter().map(|x| x.clone().into_string().expect("should be strings")));
1db9dbe390 2024-11-28 arcade: let value = settings.get_string("unknown");
2158b44929 2025-06-12 arcade: let mut domains: HashSet<String> = HashSet::new();
2158b44929 2025-06-12 arcade: let extra_domains = settings.get_array("domains").unwrap();
2158b44929 2025-06-12 arcade: for domain in extra_domains {
2158b44929 2025-06-12 arcade: let domain = domain.to_string().to_lowercase();
2158b44929 2025-06-12 arcade: if RE_DOMAIN.is_match(&domain) {
2158b44929 2025-06-12 arcade: domains.insert(domain);
2158b44929 2025-06-12 arcade: } else {
2158b44929 2025-06-12 arcade: panic!("[smtp2tg.toml] can't check of domains in \"domains\": {domain}");
2158b44929 2025-06-12 arcade: }
2158b44929 2025-06-12 arcade: }
2158b44929 2025-06-12 arcade: let domains = domains.into_iter().map(|s| escape(&s))
2158b44929 2025-06-12 arcade: .collect::<Vec<String>>().join("|");
2158b44929 2025-06-12 arcade: let address = Regex::new(&format!("^(?P<user>[a-z0-9][-a-z0-9])(@({domains}))$")).unwrap();
1db9dbe390 2024-11-28 arcade: let relay = match value {
1db9dbe390 2024-11-28 arcade: Ok(value) => {
1db9dbe390 2024-11-28 arcade: match value.as_str() {
1db9dbe390 2024-11-28 arcade: "relay" => true,
1db9dbe390 2024-11-28 arcade: "deny" => false,
1db9dbe390 2024-11-28 arcade: _ => {
1db9dbe390 2024-11-28 arcade: eprintln!("[smtp2tg.toml] \"unknown\" should be either \"relay\" or \"deny\".\n");
1db9dbe390 2024-11-28 arcade: panic!("bad setting");
1db9dbe390 2024-11-28 arcade: },
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: },
1db9dbe390 2024-11-28 arcade: Err(err) => {
c808d500e6 2025-03-09 arcade: eprintln!("[smtp2tg.toml] can't get \"unknown\":\n {err:?}\n");
1db9dbe390 2024-11-28 arcade: panic!("bad setting");
1db9dbe390 2024-11-28 arcade: },
1db9dbe390 2024-11-28 arcade: };
ce79786e06 2024-06-11 arcade:
ce79786e06 2024-06-11 arcade: TelegramTransport {
1db9dbe390 2024-11-28 arcade: data: vec!(),
1db9dbe390 2024-11-28 arcade: headers: None,
ce79786e06 2024-06-11 arcade: recipients,
1db9dbe390 2024-11-28 arcade: relay,
1db9dbe390 2024-11-28 arcade: tg,
28fde40f7a 2024-12-27 arcade: fields,
2158b44929 2025-06-12 arcade: address,
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: /// Send message to default user, used for debug/log/info purposes
c808d500e6 2025-03-09 arcade: async fn debug (&self, msg: &str) -> Result<Message, MyError> {
d96b1b4710 2025-06-11 arcade: self.send(self.recipients.get("_").ok_or(MyError::NoDefault)?, encode(msg)).await
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: /// Send message to specified user
d96b1b4710 2025-06-11 arcade: async fn send <S> (&self, to: &ChatPeerId, msg: S) -> Result<Message, MyError>
1db9dbe390 2024-11-28 arcade: where S: Into<String> {
d96b1b4710 2025-06-11 arcade: Ok(self.tg.execute(
d96b1b4710 2025-06-11 arcade: SendMessage::new(*to, msg)
d96b1b4710 2025-06-11 arcade: .with_parse_mode(MarkdownV2)
d96b1b4710 2025-06-11 arcade: ).await?)
d96b1b4710 2025-06-11 arcade: }
d96b1b4710 2025-06-11 arcade:
2158b44929 2025-06-12 arcade: /// Returns id for provided email address
2158b44929 2025-06-12 arcade: fn get_id (&self, name: &str) -> Result<&ChatPeerId, MyError> {
2158b44929 2025-06-12 arcade: // here we need to store String locally to borrow it after
2158b44929 2025-06-12 arcade: let mut link = name;
2158b44929 2025-06-12 arcade: let name: String;
2158b44929 2025-06-12 arcade: if let Some(caps) = self.address.captures(link) {
2158b44929 2025-06-12 arcade: name = caps["name"].to_string();
2158b44929 2025-06-12 arcade: link = &name;
2158b44929 2025-06-12 arcade: }
2158b44929 2025-06-12 arcade: match self.recipients.get(link) {
2158b44929 2025-06-12 arcade: Some(addr) => Ok(addr),
2158b44929 2025-06-12 arcade: None => {
2158b44929 2025-06-12 arcade: self.recipients.get("_")
2158b44929 2025-06-12 arcade: .ok_or(MyError::NoDefault)
2158b44929 2025-06-12 arcade: }
2158b44929 2025-06-12 arcade: }
2158b44929 2025-06-12 arcade: }
2158b44929 2025-06-12 arcade:
1db9dbe390 2024-11-28 arcade: /// Attempt to deliver one message
65b2967a92 2025-01-25 arcade: async fn relay_mail (&self) -> Result<(), MyError> {
1db9dbe390 2024-11-28 arcade: if let Some(headers) = &self.headers {
1db9dbe390 2024-11-28 arcade: let mail = mail_parser::MessageParser::new().parse(&self.data)
65b2967a92 2025-01-25 arcade: .ok_or(MyError::BadMail)?;
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: // Adding all known addresses to recipient list, for anyone else adding default
1db9dbe390 2024-11-28 arcade: // Also if list is empty also adding default
d96b1b4710 2025-06-11 arcade: let mut rcpt: HashSet<&ChatPeerId> = HashSet::new();
1db9dbe390 2024-11-28 arcade: if headers.to.is_empty() {
65b2967a92 2025-01-25 arcade: return Err(MyError::NoRecipient);
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: for item in &headers.to {
2158b44929 2025-06-12 arcade: rcpt.insert(self.get_id(item)?);
1db9dbe390 2024-11-28 arcade: };
1db9dbe390 2024-11-28 arcade: if rcpt.is_empty() {
65b2967a92 2025-01-25 arcade: self.debug("No recipient or envelope address.").await?;
1db9dbe390 2024-11-28 arcade: rcpt.insert(self.recipients.get("_")
65b2967a92 2025-01-25 arcade: .ok_or(MyError::NoDefault)?);
1db9dbe390 2024-11-28 arcade: };
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: // prepating message header
65b2967a92 2025-01-25 arcade: let mut reply: Vec<String> = vec![];
28fde40f7a 2024-12-27 arcade: if self.fields.contains("subject") {
28fde40f7a 2024-12-27 arcade: if let Some(subject) = mail.subject() {
65b2967a92 2025-01-25 arcade: reply.push(format!("__*Subject:*__ `{}`", encode(subject)));
28fde40f7a 2024-12-27 arcade: } else if let Some(thread) = mail.thread_name() {
65b2967a92 2025-01-25 arcade: reply.push(format!("__*Thread:*__ `{}`", encode(thread)));
28fde40f7a 2024-12-27 arcade: }
28fde40f7a 2024-12-27 arcade: }
65b2967a92 2025-01-25 arcade: let mut short_headers: Vec<String> = vec![];
3d13e7f81d 2024-12-28 arcade: // do we need to replace spaces here?
28fde40f7a 2024-12-27 arcade: if self.fields.contains("from") {
c808d500e6 2025-03-09 arcade: short_headers.push(format!("__*From:*__ `{}`", encode(&headers.from)));
28fde40f7a 2024-12-27 arcade: }
28fde40f7a 2024-12-27 arcade: if self.fields.contains("date") {
28fde40f7a 2024-12-27 arcade: if let Some(date) = mail.date() {
c808d500e6 2025-03-09 arcade: short_headers.push(format!("__*Date:*__ `{date}`"));
28fde40f7a 2024-12-27 arcade: }
28fde40f7a 2024-12-27 arcade: }
65b2967a92 2025-01-25 arcade: reply.push(short_headers.join(" "));
3d13e7f81d 2024-12-28 arcade: let header_size = reply.join(" ").len() + 1;
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: let html_parts = mail.html_body_count();
1db9dbe390 2024-11-28 arcade: let text_parts = mail.text_body_count();
1db9dbe390 2024-11-28 arcade: let attachments = mail.attachment_count();
1db9dbe390 2024-11-28 arcade: if html_parts != text_parts {
c808d500e6 2025-03-09 arcade: self.debug(&format!("Hm, we have {html_parts} HTML parts and {text_parts} text parts.")).await?;
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: //let mut html_num = 0;
1db9dbe390 2024-11-28 arcade: let mut text_num = 0;
1db9dbe390 2024-11-28 arcade: let mut file_num = 0;
1db9dbe390 2024-11-28 arcade: // let's display first html or text part as body
6887d3b7f9 2025-06-05 arcade: let mut body: Cow<'_, str> = "".into();
1db9dbe390 2024-11-28 arcade: /*
1db9dbe390 2024-11-28 arcade: * actually I don't wanna parse that html stuff
1db9dbe390 2024-11-28 arcade: if html_parts > 0 {
1db9dbe390 2024-11-28 arcade: let text = mail.body_html(0).unwrap();
1db9dbe390 2024-11-28 arcade: if text.len() < 4096 - header_size {
1db9dbe390 2024-11-28 arcade: body = text;
1db9dbe390 2024-11-28 arcade: html_num = 1;
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: };
1db9dbe390 2024-11-28 arcade: */
6887d3b7f9 2025-06-05 arcade: if body.is_empty() && text_parts > 0 {
1db9dbe390 2024-11-28 arcade: let text = mail.body_text(0)
65b2967a92 2025-01-25 arcade: .ok_or(MyError::NoText)?;
1db9dbe390 2024-11-28 arcade: if text.len() < 4096 - header_size {
1db9dbe390 2024-11-28 arcade: body = text;
1db9dbe390 2024-11-28 arcade: text_num = 1;
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: };
1db9dbe390 2024-11-28 arcade: reply.push("```".into());
1db9dbe390 2024-11-28 arcade: reply.extend(body.lines().map(|x| x.into()));
1db9dbe390 2024-11-28 arcade: reply.push("```".into());
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: // and let's collect all other attachment parts
1db9dbe390 2024-11-28 arcade: let mut files_to_send = vec![];
1db9dbe390 2024-11-28 arcade: /*
1db9dbe390 2024-11-28 arcade: * let's just skip html parts for now, they just duplicate text?
1db9dbe390 2024-11-28 arcade: while html_num < html_parts {
1db9dbe390 2024-11-28 arcade: files_to_send.push(mail.html_part(html_num).unwrap());
1db9dbe390 2024-11-28 arcade: html_num += 1;
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: */
1db9dbe390 2024-11-28 arcade: while text_num < text_parts {
6887d3b7f9 2025-06-05 arcade: files_to_send.push(mail.text_part(text_num.try_into()?)
65b2967a92 2025-01-25 arcade: .ok_or(MyError::NoText)?);
1db9dbe390 2024-11-28 arcade: text_num += 1;
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: while file_num < attachments {
6887d3b7f9 2025-06-05 arcade: files_to_send.push(mail.attachment(file_num.try_into()?)
65b2967a92 2025-01-25 arcade: .ok_or(MyError::NoText)?);
1db9dbe390 2024-11-28 arcade: file_num += 1;
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: let msg = reply.join("\n");
1db9dbe390 2024-11-28 arcade: for chat in rcpt {
1db9dbe390 2024-11-28 arcade: if !files_to_send.is_empty() {
1db9dbe390 2024-11-28 arcade: let mut files = vec![];
d96b1b4710 2025-06-11 arcade: // let mut first_one = true;
1db9dbe390 2024-11-28 arcade: for chunk in &files_to_send {
d96b1b4710 2025-06-11 arcade: let data: Vec<u8> = chunk.contents().to_vec();
1db9dbe390 2024-11-28 arcade: let mut filename: Option<String> = None;
1db9dbe390 2024-11-28 arcade: for header in chunk.headers() {
1db9dbe390 2024-11-28 arcade: if header.name() == "Content-Type" {
1db9dbe390 2024-11-28 arcade: match header.value() {
1db9dbe390 2024-11-28 arcade: mail_parser::HeaderValue::ContentType(contenttype) => {
1db9dbe390 2024-11-28 arcade: if let Some(fname) = contenttype.attribute("name") {
1db9dbe390 2024-11-28 arcade: filename = Some(fname.to_owned());
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: },
1db9dbe390 2024-11-28 arcade: _ => {
65b2967a92 2025-01-25 arcade: self.debug("Attachment has bad ContentType header.").await?;
1db9dbe390 2024-11-28 arcade: },
1db9dbe390 2024-11-28 arcade: };
1db9dbe390 2024-11-28 arcade: };
1db9dbe390 2024-11-28 arcade: };
1db9dbe390 2024-11-28 arcade: let filename = if let Some(fname) = filename {
1db9dbe390 2024-11-28 arcade: fname
1db9dbe390 2024-11-28 arcade: } else {
1db9dbe390 2024-11-28 arcade: "Attachment.txt".into()
1db9dbe390 2024-11-28 arcade: };
d96b1b4710 2025-06-11 arcade: files.push(Attachment {
d96b1b4710 2025-06-11 arcade: data: Cursor::new(data),
d96b1b4710 2025-06-11 arcade: name: filename,
d96b1b4710 2025-06-11 arcade: });
d96b1b4710 2025-06-11 arcade: }
d96b1b4710 2025-06-11 arcade: self.sendgroup(chat, files, &msg).await?;
1db9dbe390 2024-11-28 arcade: } else {
1db9dbe390 2024-11-28 arcade: self.send(chat, &msg).await?;
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: } else {
65b2967a92 2025-01-25 arcade: return Err(MyError::NoHeaders);
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: Ok(())
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: /// Send media to specified user
d96b1b4710 2025-06-11 arcade: pub async fn sendgroup (&self, to: &ChatPeerId, media: Vec<Attachment>, msg: &str) -> Result<(), MyError> {
d96b1b4710 2025-06-11 arcade: if media.len() > 1 {
d96b1b4710 2025-06-11 arcade: let mut attach = vec![];
d96b1b4710 2025-06-11 arcade: let mut pos = media.len();
d96b1b4710 2025-06-11 arcade: for file in media {
d96b1b4710 2025-06-11 arcade: let mut caption = InputMediaDocument::default();
d96b1b4710 2025-06-11 arcade: if pos == 1 {
d96b1b4710 2025-06-11 arcade: caption = caption.with_caption(msg)
d96b1b4710 2025-06-11 arcade: .with_caption_parse_mode(MarkdownV2);
d96b1b4710 2025-06-11 arcade: }
d96b1b4710 2025-06-11 arcade: pos -= 1;
d96b1b4710 2025-06-11 arcade: attach.push(
d96b1b4710 2025-06-11 arcade: MediaGroupItem::for_document(
d96b1b4710 2025-06-11 arcade: InputFile::from(
d96b1b4710 2025-06-11 arcade: InputFileReader::from(file.data)
d96b1b4710 2025-06-11 arcade: .with_file_name(file.name)
d96b1b4710 2025-06-11 arcade: ),
d96b1b4710 2025-06-11 arcade: caption
d96b1b4710 2025-06-11 arcade: )
d96b1b4710 2025-06-11 arcade: );
d96b1b4710 2025-06-11 arcade: }
d96b1b4710 2025-06-11 arcade: self.tg.execute(SendMediaGroup::new(*to, MediaGroup::new(attach)?)).await?;
d96b1b4710 2025-06-11 arcade: } else {
d96b1b4710 2025-06-11 arcade: self.tg.execute(
d96b1b4710 2025-06-11 arcade: SendDocument::new(
d96b1b4710 2025-06-11 arcade: *to,
d96b1b4710 2025-06-11 arcade: InputFileReader::from(media[0].data.clone())
d96b1b4710 2025-06-11 arcade: .with_file_name(media[0].name.clone())
d96b1b4710 2025-06-11 arcade: ).with_caption(msg)
d96b1b4710 2025-06-11 arcade: .with_caption_parse_mode(MarkdownV2)
d96b1b4710 2025-06-11 arcade: ).await?;
d96b1b4710 2025-06-11 arcade: }
d96b1b4710 2025-06-11 arcade: Ok(())
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: impl mailin_embedded::Handler for TelegramTransport {
1db9dbe390 2024-11-28 arcade: /// Just deny login auth
1db9dbe390 2024-11-28 arcade: fn auth_login (&mut self, _username: &str, _password: &str) -> Response {
1db9dbe390 2024-11-28 arcade: INVALID_CREDENTIALS
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: /// Just deny plain auth
1db9dbe390 2024-11-28 arcade: fn auth_plain (&mut self, _authorization_id: &str, _authentication_id: &str, _password: &str) -> Response {
1db9dbe390 2024-11-28 arcade: INVALID_CREDENTIALS
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: /// Verify whether address is deliverable
1db9dbe390 2024-11-28 arcade: fn rcpt (&mut self, to: &str) -> Response {
1db9dbe390 2024-11-28 arcade: if self.relay {
1db9dbe390 2024-11-28 arcade: OK
1db9dbe390 2024-11-28 arcade: } else {
2158b44929 2025-06-12 arcade: match self.get_id(to) {
2158b44929 2025-06-12 arcade: Ok(_) => OK,
2158b44929 2025-06-12 arcade: Err(_) => {
1db9dbe390 2024-11-28 arcade: if self.relay {
1db9dbe390 2024-11-28 arcade: OK
1db9dbe390 2024-11-28 arcade: } else {
1db9dbe390 2024-11-28 arcade: NO_MAILBOX
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: }
1db9dbe390 2024-11-28 arcade: }
ce79786e06 2024-06-11 arcade: }
ce79786e06 2024-06-11 arcade: }
ce79786e06 2024-06-11 arcade:
1db9dbe390 2024-11-28 arcade: /// Save headers we need
1db9dbe390 2024-11-28 arcade: fn data_start (&mut self, _domain: &str, from: &str, _is8bit: bool, to: &[String]) -> Response {
1db9dbe390 2024-11-28 arcade: self.headers = Some(SomeHeaders{
1db9dbe390 2024-11-28 arcade: from: from.to_string(),
1db9dbe390 2024-11-28 arcade: to: to.to_vec(),
1db9dbe390 2024-11-28 arcade: });
1db9dbe390 2024-11-28 arcade: OK
ce79786e06 2024-06-11 arcade: }
ce79786e06 2024-06-11 arcade:
1db9dbe390 2024-11-28 arcade: /// Save chunk(?) of data
65b2967a92 2025-01-25 arcade: fn data (&mut self, buf: &[u8]) -> Result<(), Error> {
1db9dbe390 2024-11-28 arcade: self.data.append(buf.to_vec().as_mut());
1db9dbe390 2024-11-28 arcade: Ok(())
ce79786e06 2024-06-11 arcade: }
ce79786e06 2024-06-11 arcade:
1db9dbe390 2024-11-28 arcade: /// Attempt to send email, return temporary error if that fails
65b2967a92 2025-01-25 arcade: fn data_end (&mut self) -> Response {
1db9dbe390 2024-11-28 arcade: let mut result = OK;
1db9dbe390 2024-11-28 arcade: task::block_on(async {
1db9dbe390 2024-11-28 arcade: // relay mail
1db9dbe390 2024-11-28 arcade: if let Err(err) = self.relay_mail().await {
1db9dbe390 2024-11-28 arcade: result = INTERNAL_ERROR;
1db9dbe390 2024-11-28 arcade: // in case that fails - inform default recipient
c808d500e6 2025-03-09 arcade: if let Err(err) = self.debug(&format!("Sending emails failed:\n{err:?}")).await {
1db9dbe390 2024-11-28 arcade: // in case that also fails - write some logs and bail
c808d500e6 2025-03-09 arcade: eprintln!("{err:?}");
1db9dbe390 2024-11-28 arcade: };
1db9dbe390 2024-11-28 arcade: };
1db9dbe390 2024-11-28 arcade: });
1db9dbe390 2024-11-28 arcade: // clear - just in case
1db9dbe390 2024-11-28 arcade: self.data = vec![];
1db9dbe390 2024-11-28 arcade: self.headers = None;
1db9dbe390 2024-11-28 arcade: result
7620f854a7 2024-05-21 arcade: }
7620f854a7 2024-05-21 arcade: }
7620f854a7 2024-05-21 arcade:
7620f854a7 2024-05-21 arcade: #[async_std::main]
65b2967a92 2025-01-25 arcade: async fn main () -> Result<()> {
e66352b9cc 2025-01-21 arcade: let specs = OptSpecs::new()
6887d3b7f9 2025-06-05 arcade: .option("help", "h", OptValue::None)
6887d3b7f9 2025-06-05 arcade: .option("help", "help", OptValue::None)
6887d3b7f9 2025-06-05 arcade: .option("config", "c", OptValue::Required)
6887d3b7f9 2025-06-05 arcade: .option("config", "config", OptValue::Required)
e66352b9cc 2025-01-21 arcade: .flag(OptFlags::OptionsEverywhere);
e66352b9cc 2025-01-21 arcade: let mut args = std::env::args();
e66352b9cc 2025-01-21 arcade: args.next();
e66352b9cc 2025-01-21 arcade: let parsed = specs.getopt(args);
e66352b9cc 2025-01-21 arcade: for u in &parsed.unknown {
c808d500e6 2025-03-09 arcade: println!("Unknown option: {u}");
e66352b9cc 2025-01-21 arcade: }
e66352b9cc 2025-01-21 arcade: if !(parsed.unknown.is_empty()) || parsed.options_first("help").is_some() {
e66352b9cc 2025-01-21 arcade: println!("SMTP2TG v{}, (C) 2024 - 2025\n\n\
e66352b9cc 2025-01-21 arcade: \t-h|--help\tDisplay this help\n\
e66352b9cc 2025-01-21 arcade: \t-c|-config …\tSet configuration file location.",
e66352b9cc 2025-01-21 arcade: env!("CARGO_PKG_VERSION"));
e66352b9cc 2025-01-21 arcade: return Ok(());
e66352b9cc 2025-01-21 arcade: };
e66352b9cc 2025-01-21 arcade: let config_file = Path::new(if let Some(path) = parsed.options_value_last("config") {
e66352b9cc 2025-01-21 arcade: &path[..]
e66352b9cc 2025-01-21 arcade: } else {
e66352b9cc 2025-01-21 arcade: "smtp2tg.toml"
e66352b9cc 2025-01-21 arcade: });
e66352b9cc 2025-01-21 arcade: if !config_file.exists() {
c808d500e6 2025-03-09 arcade: eprintln!("Error: can't read configuration from {config_file:?}");
e66352b9cc 2025-01-21 arcade: std::process::exit(1);
e66352b9cc 2025-01-21 arcade: };
cfe321bd6f 2025-01-23 arcade: {
cfe321bd6f 2025-01-23 arcade: let meta = metadata(config_file).await?;
cfe321bd6f 2025-01-23 arcade: if (!0o100600 & meta.permissions().mode()) > 0 {
c808d500e6 2025-03-09 arcade: eprintln!("Error: other users can read or write config file {config_file:?}\n\
c808d500e6 2025-03-09 arcade: File permissions: {:o}", meta.permissions().mode());
cfe321bd6f 2025-01-23 arcade: std::process::exit(1);
cfe321bd6f 2025-01-23 arcade: }
cfe321bd6f 2025-01-23 arcade: }
1db9dbe390 2024-11-28 arcade: let settings: config::Config = config::Config::builder()
28fde40f7a 2024-12-27 arcade: .set_default("fields", vec!["date", "from", "subject"]).unwrap()
1db9dbe390 2024-11-28 arcade: .set_default("hostname", "smtp.2.tg").unwrap()
28fde40f7a 2024-12-27 arcade: .set_default("listen_on", "0.0.0.0:1025").unwrap()
1db9dbe390 2024-11-28 arcade: .set_default("unknown", "relay").unwrap()
2158b44929 2025-06-12 arcade: .set_default("domains", vec!["localhost", hostname::get()?.to_str().expect("Failed to get current hostname")]).unwrap()
e66352b9cc 2025-01-21 arcade: .add_source(config::File::from(config_file))
1db9dbe390 2024-11-28 arcade: .build()
c808d500e6 2025-03-09 arcade: .unwrap_or_else(|_| panic!("[{config_file:?}] there was an error reading config\n\
c808d500e6 2025-03-09 arcade: \tplease consult \"smtp2tg.toml.example\" for details"));
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: let listen_on = settings.get_string("listen_on")?;
1db9dbe390 2024-11-28 arcade: let server_name = settings.get_string("hostname")?;
1db9dbe390 2024-11-28 arcade: let core = TelegramTransport::new(settings);
1db9dbe390 2024-11-28 arcade: let mut server = mailin_embedded::Server::new(core);
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: server.with_name(server_name)
1db9dbe390 2024-11-28 arcade: .with_ssl(mailin_embedded::SslConfig::None).unwrap()
1db9dbe390 2024-11-28 arcade: .with_addr(listen_on).unwrap();
1db9dbe390 2024-11-28 arcade: server.serve().unwrap();
1db9dbe390 2024-11-28 arcade:
1db9dbe390 2024-11-28 arcade: Ok(())
7620f854a7 2024-05-21 arcade: }