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) => {
1db9dbe390 2024-11-28 134: eprintln!("[smtp2tg.toml] can't get \"unknown\":\n {}\n", err);
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
65b2967a92 2025-01-25 150: async fn debug <'a, S> (&self, msg: S) -> Result<Message, MyError>
65b2967a92 2025-01-25 151: where S: Into<&'a str> {
65b2967a92 2025-01-25 152: let msg = msg.into();
65b2967a92 2025-01-25 153: Ok(self.tg.send_message(*self.recipients.get("_").ok_or(MyError::NoDefault)?, encode(msg)).await?)
f4cad2a5c0 2024-05-26 154: }
f4cad2a5c0 2024-05-26 155:
1db9dbe390 2024-11-28 156: /// Send message to specified user
65b2967a92 2025-01-25 157: async fn send <S> (&self, to: &ChatId, msg: S) -> Result<Message, MyError>
f4cad2a5c0 2024-05-26 158: where S: Into<String> {
f4cad2a5c0 2024-05-26 159: Ok(self.tg.send_message(*to, msg).await?)
f4cad2a5c0 2024-05-26 160: }
f4cad2a5c0 2024-05-26 161:
1db9dbe390 2024-11-28 162: /// Attempt to deliver one message
65b2967a92 2025-01-25 163: async fn relay_mail (&self) -> Result<(), MyError> {
1db9dbe390 2024-11-28 164: if let Some(headers) = &self.headers {
1db9dbe390 2024-11-28 165: let mail = mail_parser::MessageParser::new().parse(&self.data)
65b2967a92 2025-01-25 166: .ok_or(MyError::BadMail)?;
1db9dbe390 2024-11-28 167:
1db9dbe390 2024-11-28 168: // Adding all known addresses to recipient list, for anyone else adding default
1db9dbe390 2024-11-28 169: // Also if list is empty also adding default
1db9dbe390 2024-11-28 170: let mut rcpt: HashSet<&ChatId> = HashSet::new();
1db9dbe390 2024-11-28 171: if headers.to.is_empty() {
65b2967a92 2025-01-25 172: return Err(MyError::NoRecipient);
1db9dbe390 2024-11-28 173: }
1db9dbe390 2024-11-28 174: for item in &headers.to {
1db9dbe390 2024-11-28 175: match self.recipients.get(item) {
1db9dbe390 2024-11-28 176: Some(addr) => rcpt.insert(addr),
1db9dbe390 2024-11-28 177: None => {
65b2967a92 2025-01-25 178: self.debug(&*format!("Recipient [{}] not found.", &item)).await?;
1db9dbe390 2024-11-28 179: rcpt.insert(self.recipients.get("_")
65b2967a92 2025-01-25 180: .ok_or(MyError::NoDefault)?)
1db9dbe390 2024-11-28 181: }
1db9dbe390 2024-11-28 182: };
1db9dbe390 2024-11-28 183: };
1db9dbe390 2024-11-28 184: if rcpt.is_empty() {
65b2967a92 2025-01-25 185: self.debug("No recipient or envelope address.").await?;
1db9dbe390 2024-11-28 186: rcpt.insert(self.recipients.get("_")
65b2967a92 2025-01-25 187: .ok_or(MyError::NoDefault)?);
1db9dbe390 2024-11-28 188: };
1db9dbe390 2024-11-28 189:
1db9dbe390 2024-11-28 190: // prepating message header
65b2967a92 2025-01-25 191: let mut reply: Vec<String> = vec![];
28fde40f7a 2024-12-27 192: if self.fields.contains("subject") {
28fde40f7a 2024-12-27 193: if let Some(subject) = mail.subject() {
65b2967a92 2025-01-25 194: reply.push(format!("__*Subject:*__ `{}`", encode(subject)));
28fde40f7a 2024-12-27 195: } else if let Some(thread) = mail.thread_name() {
65b2967a92 2025-01-25 196: reply.push(format!("__*Thread:*__ `{}`", encode(thread)));
28fde40f7a 2024-12-27 197: }
28fde40f7a 2024-12-27 198: }
65b2967a92 2025-01-25 199: let mut short_headers: Vec<String> = vec![];
3d13e7f81d 2024-12-28 200: // do we need to replace spaces here?
28fde40f7a 2024-12-27 201: if self.fields.contains("from") {
65b2967a92 2025-01-25 202: short_headers.push(format!("__*From:*__ `{}`", encode(&headers.from[..])));
28fde40f7a 2024-12-27 203: }
28fde40f7a 2024-12-27 204: if self.fields.contains("date") {
28fde40f7a 2024-12-27 205: if let Some(date) = mail.date() {
65b2967a92 2025-01-25 206: short_headers.push(format!("__*Date:*__ `{}`", date));
28fde40f7a 2024-12-27 207: }
28fde40f7a 2024-12-27 208: }
65b2967a92 2025-01-25 209: reply.push(short_headers.join(" "));
3d13e7f81d 2024-12-28 210: let header_size = reply.join(" ").len() + 1;
1db9dbe390 2024-11-28 211:
1db9dbe390 2024-11-28 212: let html_parts = mail.html_body_count();
1db9dbe390 2024-11-28 213: let text_parts = mail.text_body_count();
1db9dbe390 2024-11-28 214: let attachments = mail.attachment_count();
1db9dbe390 2024-11-28 215: if html_parts != text_parts {
65b2967a92 2025-01-25 216: self.debug(&*format!("Hm, we have {} HTML parts and {} text parts.", html_parts, text_parts)).await?;
1db9dbe390 2024-11-28 217: }
1db9dbe390 2024-11-28 218: //let mut html_num = 0;
1db9dbe390 2024-11-28 219: let mut text_num = 0;
1db9dbe390 2024-11-28 220: let mut file_num = 0;
1db9dbe390 2024-11-28 221: // let's display first html or text part as body
1db9dbe390 2024-11-28 222: let mut body = "".into();
1db9dbe390 2024-11-28 223: /*
1db9dbe390 2024-11-28 224: * actually I don't wanna parse that html stuff
1db9dbe390 2024-11-28 225: if html_parts > 0 {
1db9dbe390 2024-11-28 226: let text = mail.body_html(0).unwrap();
1db9dbe390 2024-11-28 227: if text.len() < 4096 - header_size {
1db9dbe390 2024-11-28 228: body = text;
1db9dbe390 2024-11-28 229: html_num = 1;
1db9dbe390 2024-11-28 230: }
1db9dbe390 2024-11-28 231: };
1db9dbe390 2024-11-28 232: */
1db9dbe390 2024-11-28 233: if body == "" && text_parts > 0 {
1db9dbe390 2024-11-28 234: let text = mail.body_text(0)
65b2967a92 2025-01-25 235: .ok_or(MyError::NoText)?;
1db9dbe390 2024-11-28 236: if text.len() < 4096 - header_size {
1db9dbe390 2024-11-28 237: body = text;
1db9dbe390 2024-11-28 238: text_num = 1;
1db9dbe390 2024-11-28 239: }
1db9dbe390 2024-11-28 240: };
1db9dbe390 2024-11-28 241: reply.push("```".into());
1db9dbe390 2024-11-28 242: reply.extend(body.lines().map(|x| x.into()));
1db9dbe390 2024-11-28 243: reply.push("```".into());
1db9dbe390 2024-11-28 244:
1db9dbe390 2024-11-28 245: // and let's collect all other attachment parts
1db9dbe390 2024-11-28 246: let mut files_to_send = vec![];
1db9dbe390 2024-11-28 247: /*
1db9dbe390 2024-11-28 248: * let's just skip html parts for now, they just duplicate text?
1db9dbe390 2024-11-28 249: while html_num < html_parts {
1db9dbe390 2024-11-28 250: files_to_send.push(mail.html_part(html_num).unwrap());
1db9dbe390 2024-11-28 251: html_num += 1;
1db9dbe390 2024-11-28 252: }
1db9dbe390 2024-11-28 253: */
1db9dbe390 2024-11-28 254: while text_num < text_parts {
1db9dbe390 2024-11-28 255: files_to_send.push(mail.text_part(text_num)
65b2967a92 2025-01-25 256: .ok_or(MyError::NoText)?);
1db9dbe390 2024-11-28 257: text_num += 1;
1db9dbe390 2024-11-28 258: }
1db9dbe390 2024-11-28 259: while file_num < attachments {
1db9dbe390 2024-11-28 260: files_to_send.push(mail.attachment(file_num)
65b2967a92 2025-01-25 261: .ok_or(MyError::NoText)?);
1db9dbe390 2024-11-28 262: file_num += 1;
1db9dbe390 2024-11-28 263: }
1db9dbe390 2024-11-28 264:
1db9dbe390 2024-11-28 265: let msg = reply.join("\n");
1db9dbe390 2024-11-28 266: for chat in rcpt {
1db9dbe390 2024-11-28 267: if !files_to_send.is_empty() {
1db9dbe390 2024-11-28 268: let mut files = vec![];
1db9dbe390 2024-11-28 269: let mut first_one = true;
1db9dbe390 2024-11-28 270: for chunk in &files_to_send {
1db9dbe390 2024-11-28 271: let data = chunk.contents();
1db9dbe390 2024-11-28 272: let mut filename: Option<String> = None;
1db9dbe390 2024-11-28 273: for header in chunk.headers() {
1db9dbe390 2024-11-28 274: if header.name() == "Content-Type" {
1db9dbe390 2024-11-28 275: match header.value() {
1db9dbe390 2024-11-28 276: mail_parser::HeaderValue::ContentType(contenttype) => {
1db9dbe390 2024-11-28 277: if let Some(fname) = contenttype.attribute("name") {
1db9dbe390 2024-11-28 278: filename = Some(fname.to_owned());
1db9dbe390 2024-11-28 279: }
1db9dbe390 2024-11-28 280: },
1db9dbe390 2024-11-28 281: _ => {
65b2967a92 2025-01-25 282: self.debug("Attachment has bad ContentType header.").await?;
1db9dbe390 2024-11-28 283: },
1db9dbe390 2024-11-28 284: };
1db9dbe390 2024-11-28 285: };
1db9dbe390 2024-11-28 286: };
1db9dbe390 2024-11-28 287: let filename = if let Some(fname) = filename {
1db9dbe390 2024-11-28 288: fname
1db9dbe390 2024-11-28 289: } else {
1db9dbe390 2024-11-28 290: "Attachment.txt".into()
1db9dbe390 2024-11-28 291: };
1db9dbe390 2024-11-28 292: let item = teloxide::types::InputMediaDocument::new(
1db9dbe390 2024-11-28 293: teloxide::types::InputFile::memory(data.to_vec())
1db9dbe390 2024-11-28 294: .file_name(filename));
1db9dbe390 2024-11-28 295: let item = if first_one {
1db9dbe390 2024-11-28 296: first_one = false;
65b2967a92 2025-01-25 297: item.caption(&msg)
1db9dbe390 2024-11-28 298: } else {
1db9dbe390 2024-11-28 299: item
1db9dbe390 2024-11-28 300: };
1db9dbe390 2024-11-28 301: files.push(InputMedia::Document(item));
1db9dbe390 2024-11-28 302: }
1db9dbe390 2024-11-28 303: self.sendgroup(chat, files).await?;
1db9dbe390 2024-11-28 304: } else {
1db9dbe390 2024-11-28 305: self.send(chat, &msg).await?;
1db9dbe390 2024-11-28 306: }
1db9dbe390 2024-11-28 307: }
1db9dbe390 2024-11-28 308: } else {
65b2967a92 2025-01-25 309: return Err(MyError::NoHeaders);
1db9dbe390 2024-11-28 310: }
1db9dbe390 2024-11-28 311: Ok(())
1db9dbe390 2024-11-28 312: }
1db9dbe390 2024-11-28 313:
1db9dbe390 2024-11-28 314: /// Send media to specified user
65b2967a92 2025-01-25 315: pub async fn sendgroup <M> (&self, to: &ChatId, media: M) -> Result<Vec<Message>, MyError>
866aad57a4 2024-06-15 316: where M: IntoIterator<Item = InputMedia> {
f4cad2a5c0 2024-05-26 317: Ok(self.tg.send_media_group(*to, media).await?)
f4cad2a5c0 2024-05-26 318: }
f4cad2a5c0 2024-05-26 319: }
f4cad2a5c0 2024-05-26 320:
1db9dbe390 2024-11-28 321: impl mailin_embedded::Handler for TelegramTransport {
1db9dbe390 2024-11-28 322: /// Just deny login auth
1db9dbe390 2024-11-28 323: fn auth_login (&mut self, _username: &str, _password: &str) -> Response {
1db9dbe390 2024-11-28 324: INVALID_CREDENTIALS
1db9dbe390 2024-11-28 325: }
1db9dbe390 2024-11-28 326:
1db9dbe390 2024-11-28 327: /// Just deny plain auth
1db9dbe390 2024-11-28 328: fn auth_plain (&mut self, _authorization_id: &str, _authentication_id: &str, _password: &str) -> Response {
1db9dbe390 2024-11-28 329: INVALID_CREDENTIALS
1db9dbe390 2024-11-28 330: }
1db9dbe390 2024-11-28 331:
1db9dbe390 2024-11-28 332: /// Verify whether address is deliverable
1db9dbe390 2024-11-28 333: fn rcpt (&mut self, to: &str) -> Response {
1db9dbe390 2024-11-28 334: if self.relay {
1db9dbe390 2024-11-28 335: OK
1db9dbe390 2024-11-28 336: } else {
1db9dbe390 2024-11-28 337: match self.recipients.get(to) {
1db9dbe390 2024-11-28 338: Some(_) => OK,
1db9dbe390 2024-11-28 339: None => {
1db9dbe390 2024-11-28 340: if self.relay {
1db9dbe390 2024-11-28 341: OK
1db9dbe390 2024-11-28 342: } else {
1db9dbe390 2024-11-28 343: NO_MAILBOX
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: }
1db9dbe390 2024-11-28 349:
1db9dbe390 2024-11-28 350: /// Save headers we need
1db9dbe390 2024-11-28 351: fn data_start (&mut self, _domain: &str, from: &str, _is8bit: bool, to: &[String]) -> Response {
1db9dbe390 2024-11-28 352: self.headers = Some(SomeHeaders{
1db9dbe390 2024-11-28 353: from: from.to_string(),
1db9dbe390 2024-11-28 354: to: to.to_vec(),
1db9dbe390 2024-11-28 355: });
1db9dbe390 2024-11-28 356: OK
1db9dbe390 2024-11-28 357: }
1db9dbe390 2024-11-28 358:
1db9dbe390 2024-11-28 359: /// Save chunk(?) of data
65b2967a92 2025-01-25 360: fn data (&mut self, buf: &[u8]) -> Result<(), Error> {
1db9dbe390 2024-11-28 361: self.data.append(buf.to_vec().as_mut());
1db9dbe390 2024-11-28 362: Ok(())
1db9dbe390 2024-11-28 363: }
1db9dbe390 2024-11-28 364:
1db9dbe390 2024-11-28 365: /// Attempt to send email, return temporary error if that fails
65b2967a92 2025-01-25 366: fn data_end (&mut self) -> Response {
1db9dbe390 2024-11-28 367: let mut result = OK;
1db9dbe390 2024-11-28 368: task::block_on(async {
1db9dbe390 2024-11-28 369: // relay mail
1db9dbe390 2024-11-28 370: if let Err(err) = self.relay_mail().await {
1db9dbe390 2024-11-28 371: result = INTERNAL_ERROR;
1db9dbe390 2024-11-28 372: // in case that fails - inform default recipient
65b2967a92 2025-01-25 373: if let Err(err) = self.debug(&*format!("Sending emails failed:\n{}", err)).await {
1db9dbe390 2024-11-28 374: // in case that also fails - write some logs and bail
65b2967a92 2025-01-25 375: eprintln!("{:?}", err);
1db9dbe390 2024-11-28 376: };
1db9dbe390 2024-11-28 377: };
1db9dbe390 2024-11-28 378: });
1db9dbe390 2024-11-28 379: // clear - just in case
1db9dbe390 2024-11-28 380: self.data = vec![];
1db9dbe390 2024-11-28 381: self.headers = None;
1db9dbe390 2024-11-28 382: result
1db9dbe390 2024-11-28 383: }
1db9dbe390 2024-11-28 384: }
1db9dbe390 2024-11-28 385:
1db9dbe390 2024-11-28 386: #[async_std::main]
65b2967a92 2025-01-25 387: async fn main () -> Result<()> {
e66352b9cc 2025-01-21 388: let specs = OptSpecs::new()
e66352b9cc 2025-01-21 389: .option("help", "h", OptValueType::None)
e66352b9cc 2025-01-21 390: .option("help", "help", OptValueType::None)
e66352b9cc 2025-01-21 391: .option("config", "c", OptValueType::Required)
e66352b9cc 2025-01-21 392: .option("config", "config", OptValueType::Required)
e66352b9cc 2025-01-21 393: .flag(OptFlags::OptionsEverywhere);
e66352b9cc 2025-01-21 394: let mut args = std::env::args();
e66352b9cc 2025-01-21 395: args.next();
e66352b9cc 2025-01-21 396: let parsed = specs.getopt(args);
e66352b9cc 2025-01-21 397: for u in &parsed.unknown {
e66352b9cc 2025-01-21 398: println!("Unknown option: {}", u);
e66352b9cc 2025-01-21 399: }
e66352b9cc 2025-01-21 400: if !(parsed.unknown.is_empty()) || parsed.options_first("help").is_some() {
e66352b9cc 2025-01-21 401: println!("SMTP2TG v{}, (C) 2024 - 2025\n\n\
e66352b9cc 2025-01-21 402: \t-h|--help\tDisplay this help\n\
e66352b9cc 2025-01-21 403: \t-c|-config …\tSet configuration file location.",
e66352b9cc 2025-01-21 404: env!("CARGO_PKG_VERSION"));
e66352b9cc 2025-01-21 405: return Ok(());
e66352b9cc 2025-01-21 406: };
e66352b9cc 2025-01-21 407: let config_file = Path::new(if let Some(path) = parsed.options_value_last("config") {
e66352b9cc 2025-01-21 408: &path[..]
e66352b9cc 2025-01-21 409: } else {
e66352b9cc 2025-01-21 410: "smtp2tg.toml"
e66352b9cc 2025-01-21 411: });
e66352b9cc 2025-01-21 412: if !config_file.exists() {
e66352b9cc 2025-01-21 413: eprintln!("Error: can't read configuration from {:?}", config_file);
e66352b9cc 2025-01-21 414: std::process::exit(1);
e66352b9cc 2025-01-21 415: };
cfe321bd6f 2025-01-23 416: {
cfe321bd6f 2025-01-23 417: let meta = metadata(config_file).await?;
cfe321bd6f 2025-01-23 418: if (!0o100600 & meta.permissions().mode()) > 0 {
cfe321bd6f 2025-01-23 419: eprintln!("Error: other users can read or write config file {:?}\n\
cfe321bd6f 2025-01-23 420: File permissions: {:o}",
cfe321bd6f 2025-01-23 421: config_file, meta.permissions().mode());
cfe321bd6f 2025-01-23 422: std::process::exit(1);
cfe321bd6f 2025-01-23 423: }
cfe321bd6f 2025-01-23 424: }
1db9dbe390 2024-11-28 425: let settings: config::Config = config::Config::builder()
28fde40f7a 2024-12-27 426: .set_default("fields", vec!["date", "from", "subject"]).unwrap()
1db9dbe390 2024-11-28 427: .set_default("hostname", "smtp.2.tg").unwrap()
28fde40f7a 2024-12-27 428: .set_default("listen_on", "0.0.0.0:1025").unwrap()
1db9dbe390 2024-11-28 429: .set_default("unknown", "relay").unwrap()
e66352b9cc 2025-01-21 430: .add_source(config::File::from(config_file))
1db9dbe390 2024-11-28 431: .build()
e66352b9cc 2025-01-21 432: .expect(&format!("[{:?}] there was an error reading config\n\
e66352b9cc 2025-01-21 433: \tplease consult \"smtp2tg.toml.example\" for details",
e66352b9cc 2025-01-21 434: config_file)[..]);
1db9dbe390 2024-11-28 435:
1db9dbe390 2024-11-28 436: let listen_on = settings.get_string("listen_on")?;
1db9dbe390 2024-11-28 437: let server_name = settings.get_string("hostname")?;
1db9dbe390 2024-11-28 438: let core = TelegramTransport::new(settings);
1db9dbe390 2024-11-28 439: let mut server = mailin_embedded::Server::new(core);
1db9dbe390 2024-11-28 440:
1db9dbe390 2024-11-28 441: server.with_name(server_name)
1db9dbe390 2024-11-28 442: .with_ssl(mailin_embedded::SslConfig::None).unwrap()
1db9dbe390 2024-11-28 443: .with_addr(listen_on).unwrap();
1db9dbe390 2024-11-28 444: server.serve().unwrap();
1db9dbe390 2024-11-28 445:
1db9dbe390 2024-11-28 446: Ok(())
7620f854a7 2024-05-21 447: }