1141 lines
43 KiB
Rust
1141 lines
43 KiB
Rust
/*
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* meli - imap module.
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*
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* Copyright 2017 - 2019 Manos Pitsidianakis
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*
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* This file is part of meli.
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*
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* meli is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* meli is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with meli. If not, see <http://www.gnu.org/licenses/>.
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*/
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use super::protocol_parser::{ImapLineSplit, ImapResponse, RequiredResponses, SelectResponse};
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use crate::backends::{MailboxHash, RefreshEvent};
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use crate::connections::{lookup_ipv4, timeout, Connection};
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use crate::email::parser::BytesExt;
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use crate::error::*;
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extern crate native_tls;
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use futures::io::{AsyncReadExt, AsyncWriteExt};
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use native_tls::TlsConnector;
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pub use smol::Async as AsyncWrapper;
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use std::collections::HashSet;
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use std::convert::TryFrom;
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use std::future::Future;
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use std::iter::FromIterator;
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use std::pin::Pin;
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use std::sync::Arc;
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use std::time::{Duration, Instant, SystemTime};
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const IMAP_PROTOCOL_TIMEOUT: Duration = Duration::from_secs(60 * 28);
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use super::protocol_parser;
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use super::{Capabilities, ImapServerConf, UIDStore};
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#[derive(Debug, Clone, Copy)]
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pub enum SyncPolicy {
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None,
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///rfc4549 `Synch Ops for Disconnected IMAP4 Clients` https://tools.ietf.org/html/rfc4549
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Basic,
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///rfc7162 `IMAP Extensions: Quick Flag Changes Resynchronization (CONDSTORE) and Quick Mailbox Resynchronization (QRESYNC)`
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Condstore,
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CondstoreQresync,
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}
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#[derive(Debug, Clone, Copy)]
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pub enum ImapProtocol {
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IMAP { extension_use: ImapExtensionUse },
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ManageSieve,
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}
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#[derive(Debug, Clone, Copy)]
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pub struct ImapExtensionUse {
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pub condstore: bool,
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pub idle: bool,
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#[cfg(feature = "deflate_compression")]
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pub deflate: bool,
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pub oauth2: bool,
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}
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impl Default for ImapExtensionUse {
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fn default() -> Self {
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Self {
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condstore: true,
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idle: true,
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#[cfg(feature = "deflate_compression")]
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deflate: true,
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oauth2: false,
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}
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}
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}
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#[derive(Debug)]
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pub struct ImapStream {
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pub cmd_id: usize,
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pub stream: AsyncWrapper<Connection>,
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pub protocol: ImapProtocol,
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pub current_mailbox: MailboxSelection,
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pub timeout: Option<Duration>,
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}
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#[derive(Debug, Copy, Clone, Eq, PartialEq)]
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pub enum MailboxSelection {
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None,
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Select(MailboxHash),
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Examine(MailboxHash),
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}
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impl MailboxSelection {
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pub fn take(&mut self) -> Self {
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std::mem::replace(self, MailboxSelection::None)
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}
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}
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async fn try_await(cl: impl Future<Output = Result<()>> + Send) -> Result<()> {
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cl.await
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}
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#[derive(Debug)]
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pub struct ImapConnection {
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pub stream: Result<ImapStream>,
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pub server_conf: ImapServerConf,
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pub sync_policy: SyncPolicy,
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pub uid_store: Arc<UIDStore>,
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}
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impl ImapStream {
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pub async fn new_connection(
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server_conf: &ImapServerConf,
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) -> Result<(Capabilities, ImapStream)> {
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use std::net::TcpStream;
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let path = &server_conf.server_hostname;
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let cmd_id = 1;
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let stream = if server_conf.use_tls {
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let mut connector = TlsConnector::builder();
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if server_conf.danger_accept_invalid_certs {
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connector.danger_accept_invalid_certs(true);
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}
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let connector = connector
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.build()
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.chain_err_kind(crate::error::ErrorKind::Network)?;
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let addr = if let Ok(a) = lookup_ipv4(path, server_conf.server_port) {
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a
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} else {
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return Err(MeliError::new(format!(
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"Could not lookup address {}",
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&path
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)));
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};
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let mut socket = AsyncWrapper::new(Connection::Tcp(
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if let Some(timeout) = server_conf.timeout {
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TcpStream::connect_timeout(&addr, timeout)
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.chain_err_kind(crate::error::ErrorKind::Network)?
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} else {
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TcpStream::connect(&addr).chain_err_kind(crate::error::ErrorKind::Network)?
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},
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))
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.chain_err_kind(crate::error::ErrorKind::Network)?;
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if server_conf.use_starttls {
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let err_fn = || {
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if server_conf.server_port == 993 {
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"STARTTLS failed. Server port is set to 993, which normally uses TLS. Maybe try disabling use_starttls."
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} else {
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"STARTTLS failed. Is the connection already encrypted?"
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}
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};
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let mut buf = vec![0; Connection::IO_BUF_SIZE];
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match server_conf.protocol {
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ImapProtocol::IMAP { .. } => socket
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.write_all(format!("M{} STARTTLS\r\n", cmd_id).as_bytes())
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.await
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.chain_err_summary(err_fn)
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.chain_err_kind(crate::error::ErrorKind::Network)?,
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ImapProtocol::ManageSieve => {
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socket
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.read(&mut buf)
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.await
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.chain_err_summary(err_fn)
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.chain_err_kind(crate::error::ErrorKind::Network)?;
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socket
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.write_all(b"STARTTLS\r\n")
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.await
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.chain_err_summary(err_fn)
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.chain_err_kind(crate::error::ErrorKind::Network)?;
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}
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}
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socket
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.flush()
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.await
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.chain_err_summary(err_fn)
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.chain_err_kind(crate::error::ErrorKind::Network)?;
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let mut response = Vec::with_capacity(1024);
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let mut broken = false;
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let now = Instant::now();
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while now.elapsed().as_secs() < 3 {
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let len = socket
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.read(&mut buf)
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.await
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.chain_err_summary(err_fn)
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.chain_err_kind(crate::error::ErrorKind::Network)?;
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response.extend_from_slice(&buf[0..len]);
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match server_conf.protocol {
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ImapProtocol::IMAP { .. } => {
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if response.starts_with(b"* OK ") && response.find(b"\r\n").is_some() {
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if let Some(pos) = response.find(b"\r\n") {
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response.drain(0..pos + 2);
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}
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}
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}
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ImapProtocol::ManageSieve => {
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if response.starts_with(b"OK ") && response.find(b"\r\n").is_some() {
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response.clear();
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broken = true;
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break;
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}
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}
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}
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if response.starts_with(b"M1 OK") {
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broken = true;
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break;
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}
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}
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if !broken {
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return Err(MeliError::new(format!(
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"Could not initiate STARTTLS negotiation to {}.",
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path
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)));
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}
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}
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{
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// FIXME: This is blocking
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let socket = socket
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.into_inner()
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.chain_err_kind(crate::error::ErrorKind::Network)?;
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let mut conn_result = connector.connect(path, socket);
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if let Err(native_tls::HandshakeError::WouldBlock(midhandshake_stream)) =
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conn_result
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{
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let mut midhandshake_stream = Some(midhandshake_stream);
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loop {
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match midhandshake_stream.take().unwrap().handshake() {
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Ok(r) => {
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conn_result = Ok(r);
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break;
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}
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Err(native_tls::HandshakeError::WouldBlock(stream)) => {
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midhandshake_stream = Some(stream);
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}
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p => {
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p.chain_err_kind(crate::error::ErrorKind::Network)?;
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}
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}
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}
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}
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AsyncWrapper::new(Connection::Tls(
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conn_result
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.chain_err_summary(|| {
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format!("Could not initiate TLS negotiation to {}.", path)
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})
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.chain_err_kind(crate::error::ErrorKind::Network)?,
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))
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.chain_err_summary(|| format!("Could not initiate TLS negotiation to {}.", path))
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.chain_err_kind(crate::error::ErrorKind::Network)?
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}
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} else {
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let addr = if let Ok(a) = lookup_ipv4(path, server_conf.server_port) {
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a
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} else {
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return Err(MeliError::new(format!(
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"Could not lookup address {}",
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&path
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)));
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};
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AsyncWrapper::new(Connection::Tcp(
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if let Some(timeout) = server_conf.timeout {
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TcpStream::connect_timeout(&addr, timeout)
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.chain_err_kind(crate::error::ErrorKind::Network)?
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} else {
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TcpStream::connect(&addr).chain_err_kind(crate::error::ErrorKind::Network)?
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},
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))
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.chain_err_kind(crate::error::ErrorKind::Network)?
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};
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if let Err(err) = stream
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.get_ref()
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.set_keepalive(Some(Duration::new(60 * 9, 0)))
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{
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crate::log(
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format!("Could not set TCP keepalive in IMAP connection: {}", err),
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crate::LoggingLevel::WARN,
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);
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}
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let mut res = Vec::with_capacity(8 * 1024);
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let mut ret = ImapStream {
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cmd_id,
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stream,
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protocol: server_conf.protocol,
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current_mailbox: MailboxSelection::None,
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timeout: server_conf.timeout,
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};
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if let ImapProtocol::ManageSieve = server_conf.protocol {
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use data_encoding::BASE64;
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ret.read_response(&mut res).await?;
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ret.send_command(
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format!(
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"AUTHENTICATE \"PLAIN\" \"{}\"",
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BASE64.encode(
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format!(
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"\0{}\0{}",
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&server_conf.server_username, &server_conf.server_password
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)
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.as_bytes()
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)
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)
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.as_bytes(),
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)
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.await?;
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ret.read_response(&mut res).await?;
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return Ok((Default::default(), ret));
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}
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ret.send_command(b"CAPABILITY").await?;
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ret.read_response(&mut res).await?;
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let capabilities: std::result::Result<Vec<&[u8]>, _> = res
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.split_rn()
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.find(|l| l.starts_with(b"* CAPABILITY"))
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.ok_or_else(|| MeliError::new(""))
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.and_then(|res| {
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protocol_parser::capabilities(&res)
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.map_err(|_| MeliError::new(""))
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.map(|(_, v)| v)
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});
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if capabilities.is_err() {
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return Err(MeliError::new(format!(
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"Could not connect to {}: expected CAPABILITY response but got:{}",
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&server_conf.server_hostname,
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String::from_utf8_lossy(&res)
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))
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.set_kind(ErrorKind::Bug));
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}
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let capabilities = capabilities.unwrap();
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if !capabilities
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.iter()
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.any(|cap| cap.eq_ignore_ascii_case(b"IMAP4rev1"))
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{
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return Err(MeliError::new(format!(
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"Could not connect to {}: server is not IMAP4rev1 compliant",
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&server_conf.server_hostname
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)));
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} else if capabilities
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.iter()
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.any(|cap| cap.eq_ignore_ascii_case(b"LOGINDISABLED"))
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{
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return Err(MeliError::new(format!(
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"Could not connect to {}: server does not accept logins [LOGINDISABLED]",
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&server_conf.server_hostname
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))
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.set_err_kind(crate::error::ErrorKind::Authentication));
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}
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match server_conf.protocol {
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ImapProtocol::IMAP {
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extension_use: ImapExtensionUse { oauth2, .. },
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} if oauth2 => {
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if !capabilities
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.iter()
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.any(|cap| cap.eq_ignore_ascii_case(b"AUTH=XOAUTH2"))
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{
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return Err(MeliError::new(format!(
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"Could not connect to {}: OAUTH2 is enabled but server did not return AUTH=XOAUTH2 capability. Returned capabilities were: {}",
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&server_conf.server_hostname,
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capabilities.iter().map(|capability|
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String::from_utf8_lossy(capability).to_string()).collect::<Vec<String>>().join(" ")
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)));
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}
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ret.send_command(
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format!("AUTHENTICATE XOAUTH2 {}", &server_conf.server_password).as_bytes(),
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)
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.await?;
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}
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_ => {
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ret.send_command(
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format!(
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"LOGIN \"{}\" \"{}\"",
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&server_conf.server_username, &server_conf.server_password
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)
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.as_bytes(),
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)
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.await?;
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}
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}
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let tag_start = format!("M{} ", (ret.cmd_id - 1));
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let mut capabilities = None;
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loop {
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ret.read_lines(&mut res, &[], false).await?;
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let mut should_break = false;
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for l in res.split_rn() {
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if l.starts_with(b"* CAPABILITY") {
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capabilities = protocol_parser::capabilities(&l)
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.map(|(_, capabilities)| {
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HashSet::from_iter(capabilities.into_iter().map(|s: &[u8]| s.to_vec()))
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})
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.ok();
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}
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if l.starts_with(tag_start.as_bytes()) {
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if !l[tag_start.len()..].trim().starts_with(b"OK ") {
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return Err(MeliError::new(format!(
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"Could not connect. Server replied with '{}'",
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String::from_utf8_lossy(l[tag_start.len()..].trim())
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))
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.set_err_kind(crate::error::ErrorKind::Authentication));
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}
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should_break = true;
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}
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}
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if should_break {
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break;
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}
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}
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if capabilities.is_none() {
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/* sending CAPABILITY after LOGIN automatically is an RFC recommendation, so check
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* for lazy servers */
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drop(capabilities);
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ret.send_command(b"CAPABILITY").await?;
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ret.read_response(&mut res).await.unwrap();
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let capabilities = protocol_parser::capabilities(&res)?.1;
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let capabilities = HashSet::from_iter(capabilities.into_iter().map(|s| s.to_vec()));
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Ok((capabilities, ret))
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} else {
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let capabilities = capabilities.unwrap();
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Ok((capabilities, ret))
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}
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}
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pub async fn read_response(&mut self, ret: &mut Vec<u8>) -> Result<()> {
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let id = match self.protocol {
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ImapProtocol::IMAP { .. } => format!("M{} ", self.cmd_id - 1).into_bytes(),
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ImapProtocol::ManageSieve => Vec::new(),
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};
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self.read_lines(ret, &id, true).await?;
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Ok(())
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}
|
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|
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pub async fn read_lines(
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&mut self,
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ret: &mut Vec<u8>,
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termination_string: &[u8],
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keep_termination_string: bool,
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) -> Result<()> {
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let mut buf: Vec<u8> = vec![0; Connection::IO_BUF_SIZE];
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ret.clear();
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let mut last_line_idx: usize = 0;
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loop {
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match timeout(self.timeout, self.stream.read(&mut buf)).await? {
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Ok(0) => break,
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|
Ok(b) => {
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ret.extend_from_slice(&buf[0..b]);
|
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if let Some(mut pos) = ret[last_line_idx..].rfind("\r\n") {
|
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if ret[last_line_idx..].starts_with(b"* BYE") {
|
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return Err(MeliError::new("Disconnected"));
|
|
}
|
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if let Some(prev_line) =
|
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ret[last_line_idx..pos + last_line_idx].rfind(b"\r\n")
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{
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last_line_idx += prev_line + b"\r\n".len();
|
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pos -= prev_line + b"\r\n".len();
|
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}
|
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if Some(pos + b"\r\n".len()) == ret.get(last_line_idx..).map(|r| r.len()) {
|
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if !termination_string.is_empty()
|
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&& ret[last_line_idx..].starts_with(termination_string)
|
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{
|
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debug!(String::from_utf8_lossy(&ret[last_line_idx..]));
|
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if !keep_termination_string {
|
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ret.splice(last_line_idx.., std::iter::empty::<u8>());
|
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}
|
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break;
|
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} else if termination_string.is_empty() {
|
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break;
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}
|
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}
|
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last_line_idx += pos + b"\r\n".len();
|
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}
|
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}
|
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Err(e) => {
|
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return Err(MeliError::from(e).set_err_kind(crate::error::ErrorKind::Network));
|
|
}
|
|
}
|
|
}
|
|
//debug!("returning IMAP response:\n{:?}", &ret);
|
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Ok(())
|
|
}
|
|
|
|
pub async fn wait_for_continuation_request(&mut self) -> Result<()> {
|
|
let term = b"+ ";
|
|
let mut ret = Vec::new();
|
|
self.read_lines(&mut ret, &term[..], false).await?;
|
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Ok(())
|
|
}
|
|
|
|
pub async fn send_command(&mut self, command: &[u8]) -> Result<()> {
|
|
if let Err(err) = timeout(
|
|
self.timeout,
|
|
try_await(async move {
|
|
let command = command.trim();
|
|
match self.protocol {
|
|
ImapProtocol::IMAP { .. } => {
|
|
self.stream.write_all(b"M").await?;
|
|
self.stream
|
|
.write_all(self.cmd_id.to_string().as_bytes())
|
|
.await?;
|
|
self.stream.write_all(b" ").await?;
|
|
self.cmd_id += 1;
|
|
}
|
|
ImapProtocol::ManageSieve => {}
|
|
}
|
|
|
|
self.stream.write_all(command).await?;
|
|
self.stream.write_all(b"\r\n").await?;
|
|
self.stream.flush().await?;
|
|
match self.protocol {
|
|
ImapProtocol::IMAP { .. } => {
|
|
if !command.starts_with(b"LOGIN") {
|
|
debug!("sent: M{} {}", self.cmd_id - 1, unsafe {
|
|
std::str::from_utf8_unchecked(command)
|
|
});
|
|
} else {
|
|
debug!("sent: M{} LOGIN ..", self.cmd_id - 1);
|
|
}
|
|
}
|
|
ImapProtocol::ManageSieve => {}
|
|
}
|
|
Ok(())
|
|
}),
|
|
)
|
|
.await
|
|
{
|
|
Err(err.set_err_kind(crate::error::ErrorKind::Network))
|
|
} else {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
pub async fn send_literal(&mut self, data: &[u8]) -> Result<()> {
|
|
if let Err(err) = try_await(async move {
|
|
self.stream.write_all(data).await?;
|
|
self.stream.write_all(b"\r\n").await?;
|
|
self.stream.flush().await?;
|
|
Ok(())
|
|
})
|
|
.await
|
|
{
|
|
Err(err.set_err_kind(crate::error::ErrorKind::Network))
|
|
} else {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
pub async fn send_raw(&mut self, raw: &[u8]) -> Result<()> {
|
|
if let Err(err) = try_await(async move {
|
|
self.stream.write_all(raw).await?;
|
|
self.stream.write_all(b"\r\n").await?;
|
|
self.stream.flush().await?;
|
|
Ok(())
|
|
})
|
|
.await
|
|
{
|
|
Err(err.set_err_kind(crate::error::ErrorKind::Network))
|
|
} else {
|
|
Ok(())
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ImapConnection {
|
|
pub fn new_connection(
|
|
server_conf: &ImapServerConf,
|
|
uid_store: Arc<UIDStore>,
|
|
) -> ImapConnection {
|
|
ImapConnection {
|
|
stream: Err(MeliError::new("Offline".to_string())),
|
|
server_conf: server_conf.clone(),
|
|
sync_policy: if uid_store.keep_offline_cache {
|
|
SyncPolicy::Basic
|
|
} else {
|
|
SyncPolicy::None
|
|
},
|
|
uid_store,
|
|
}
|
|
}
|
|
|
|
pub fn connect<'a>(&'a mut self) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'a>> {
|
|
Box::pin(async move {
|
|
if let (time, ref mut status @ Ok(())) = *self.uid_store.is_online.lock().unwrap() {
|
|
if SystemTime::now().duration_since(time).unwrap_or_default() >= IMAP_PROTOCOL_TIMEOUT {
|
|
let err = MeliError::new("Connection timed out").set_kind(ErrorKind::Timeout);
|
|
*status = Err(err.clone());
|
|
self.stream = Err(err);
|
|
}
|
|
}
|
|
if debug!(self.stream.is_ok()) {
|
|
let mut ret = Vec::new();
|
|
if let Err(err) = try_await(async {
|
|
self.send_command(b"NOOP").await?;
|
|
self.read_response(&mut ret, RequiredResponses::empty())
|
|
.await
|
|
})
|
|
.await
|
|
{
|
|
debug!("connect(): connection is probably dead: {:?}", &err);
|
|
} else {
|
|
debug!(
|
|
"connect(): connection is probably alive, NOOP returned {:?}",
|
|
&String::from_utf8_lossy(&ret)
|
|
);
|
|
return Ok(());
|
|
}
|
|
}
|
|
let new_stream = debug!(ImapStream::new_connection(&self.server_conf).await);
|
|
if let Err(err) = new_stream.as_ref() {
|
|
self.uid_store.is_online.lock().unwrap().1 = Err(err.clone());
|
|
} else {
|
|
*self.uid_store.is_online.lock().unwrap() = (SystemTime::now(), Ok(()));
|
|
}
|
|
let (capabilities, stream) = new_stream?;
|
|
self.stream = Ok(stream);
|
|
match self.stream.as_ref()?.protocol {
|
|
ImapProtocol::IMAP {
|
|
extension_use:
|
|
ImapExtensionUse {
|
|
condstore,
|
|
#[cfg(feature = "deflate_compression")]
|
|
deflate,
|
|
idle: _idle,
|
|
oauth2: _,
|
|
},
|
|
} => {
|
|
if capabilities.contains(&b"CONDSTORE"[..]) && condstore {
|
|
match self.sync_policy {
|
|
SyncPolicy::None => { /* do nothing, sync is disabled */ }
|
|
_ => {
|
|
/* Upgrade to Condstore */
|
|
let mut ret = Vec::new();
|
|
if capabilities.contains(&b"ENABLE"[..]) {
|
|
self.send_command(b"ENABLE CONDSTORE").await?;
|
|
self.read_response(&mut ret, RequiredResponses::empty())
|
|
.await?;
|
|
} else {
|
|
self.send_command(
|
|
b"STATUS INBOX (UIDNEXT UIDVALIDITY UNSEEN MESSAGES HIGHESTMODSEQ)",
|
|
)
|
|
.await?;
|
|
self.read_response(&mut ret, RequiredResponses::empty())
|
|
.await?;
|
|
}
|
|
self.sync_policy = SyncPolicy::Condstore;
|
|
}
|
|
}
|
|
}
|
|
#[cfg(feature = "deflate_compression")]
|
|
if capabilities.contains(&b"COMPRESS=DEFLATE"[..]) && deflate {
|
|
let mut ret = Vec::new();
|
|
self.send_command(b"COMPRESS DEFLATE").await?;
|
|
self.read_response(&mut ret, RequiredResponses::empty())
|
|
.await?;
|
|
match ImapResponse::try_from(ret.as_slice())? {
|
|
ImapResponse::No(code)
|
|
| ImapResponse::Bad(code)
|
|
| ImapResponse::Preauth(code)
|
|
| ImapResponse::Bye(code) => {
|
|
crate::log(format!("Could not use COMPRESS=DEFLATE in account `{}`: server replied with `{}`", self.uid_store.account_name, code), crate::LoggingLevel::WARN);
|
|
}
|
|
ImapResponse::Ok(_) => {
|
|
let ImapStream {
|
|
cmd_id,
|
|
stream,
|
|
protocol,
|
|
current_mailbox,
|
|
timeout,
|
|
} = std::mem::replace(&mut self.stream, Err(MeliError::new("")))?;
|
|
let stream = stream.into_inner()?;
|
|
self.stream = Ok(ImapStream {
|
|
cmd_id,
|
|
stream: AsyncWrapper::new(stream.deflate())?,
|
|
protocol,
|
|
current_mailbox,
|
|
timeout,
|
|
});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
ImapProtocol::ManageSieve => {}
|
|
}
|
|
*self.uid_store.capabilities.lock().unwrap() = capabilities;
|
|
Ok(())
|
|
})
|
|
}
|
|
|
|
pub fn read_response<'a>(
|
|
&'a mut self,
|
|
ret: &'a mut Vec<u8>,
|
|
required_responses: RequiredResponses,
|
|
) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'a>> {
|
|
Box::pin(async move {
|
|
let mut response = Vec::new();
|
|
ret.clear();
|
|
self.stream.as_mut()?.read_response(&mut response).await?;
|
|
*self.uid_store.is_online.lock().unwrap() = (SystemTime::now(), Ok(()));
|
|
|
|
match self.server_conf.protocol {
|
|
ImapProtocol::IMAP { .. } => {
|
|
let r: ImapResponse = ImapResponse::try_from(response.as_slice())?;
|
|
match r {
|
|
ImapResponse::Bye(ref response_code) => {
|
|
self.stream = Err(MeliError::new(format!(
|
|
"Offline: received BYE: {:?}",
|
|
response_code
|
|
)));
|
|
ret.extend_from_slice(&response);
|
|
return r.into();
|
|
}
|
|
ImapResponse::No(ref response_code)
|
|
if required_responses.intersects(RequiredResponses::NO_REQUIRED) =>
|
|
{
|
|
debug!(
|
|
"Received expected NO response: {:?} {:?}",
|
|
response_code,
|
|
String::from_utf8_lossy(&response)
|
|
);
|
|
}
|
|
ImapResponse::No(ref response_code) => {
|
|
//FIXME return error
|
|
debug!(
|
|
"Received NO response: {:?} {:?}",
|
|
response_code,
|
|
String::from_utf8_lossy(&response)
|
|
);
|
|
(self.uid_store.event_consumer)(
|
|
self.uid_store.account_hash,
|
|
crate::backends::BackendEvent::Notice {
|
|
description: None,
|
|
content: response_code.to_string(),
|
|
level: crate::logging::LoggingLevel::ERROR,
|
|
},
|
|
);
|
|
ret.extend_from_slice(&response);
|
|
return r.into();
|
|
}
|
|
ImapResponse::Bad(ref response_code) => {
|
|
//FIXME return error
|
|
debug!(
|
|
"Received BAD response: {:?} {:?}",
|
|
response_code,
|
|
String::from_utf8_lossy(&response)
|
|
);
|
|
(self.uid_store.event_consumer)(
|
|
self.uid_store.account_hash,
|
|
crate::backends::BackendEvent::Notice {
|
|
description: None,
|
|
content: response_code.to_string(),
|
|
level: crate::logging::LoggingLevel::ERROR,
|
|
},
|
|
);
|
|
ret.extend_from_slice(&response);
|
|
return r.into();
|
|
}
|
|
_ => {}
|
|
}
|
|
/*debug!(
|
|
"check every line for required_responses: {:#?}",
|
|
&required_responses
|
|
);*/
|
|
for l in response.split_rn() {
|
|
/*debug!("check line: {}", &l);*/
|
|
if required_responses.check(l) || !self.process_untagged(l).await? {
|
|
ret.extend_from_slice(l);
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
ImapProtocol::ManageSieve => {
|
|
ret.extend_from_slice(&response);
|
|
Ok(())
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
pub async fn read_lines(
|
|
&mut self,
|
|
ret: &mut Vec<u8>,
|
|
termination_string: Vec<u8>,
|
|
) -> Result<()> {
|
|
self.stream
|
|
.as_mut()?
|
|
.read_lines(ret, &termination_string, false)
|
|
.await?;
|
|
Ok(())
|
|
}
|
|
|
|
pub async fn wait_for_continuation_request(&mut self) -> Result<()> {
|
|
self.stream
|
|
.as_mut()?
|
|
.wait_for_continuation_request()
|
|
.await?;
|
|
Ok(())
|
|
}
|
|
|
|
pub async fn send_command(&mut self, command: &[u8]) -> Result<()> {
|
|
if let Err(err) =
|
|
try_await(async { self.stream.as_mut()?.send_command(command).await }).await
|
|
{
|
|
self.stream = Err(err.clone());
|
|
if err.kind.is_network() {
|
|
self.connect().await?;
|
|
}
|
|
Err(err)
|
|
} else {
|
|
*self.uid_store.is_online.lock().unwrap() = (SystemTime::now(), Ok(()));
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
pub async fn send_literal(&mut self, data: &[u8]) -> Result<()> {
|
|
if let Err(err) = try_await(async { self.stream.as_mut()?.send_literal(data).await }).await
|
|
{
|
|
self.stream = Err(err.clone());
|
|
if err.kind.is_network() {
|
|
self.connect().await?;
|
|
}
|
|
Err(err)
|
|
} else {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
pub async fn send_raw(&mut self, raw: &[u8]) -> Result<()> {
|
|
if let Err(err) = try_await(async { self.stream.as_mut()?.send_raw(raw).await }).await {
|
|
self.stream = Err(err.clone());
|
|
if err.kind.is_network() {
|
|
self.connect().await?;
|
|
}
|
|
Err(err)
|
|
} else {
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
pub async fn select_mailbox(
|
|
&mut self,
|
|
mailbox_hash: MailboxHash,
|
|
ret: &mut Vec<u8>,
|
|
force: bool,
|
|
) -> Result<Option<SelectResponse>> {
|
|
if !force && self.stream.as_ref()?.current_mailbox == MailboxSelection::Select(mailbox_hash)
|
|
{
|
|
return Ok(None);
|
|
}
|
|
let (imap_path, no_select, permissions) = {
|
|
let m = &self.uid_store.mailboxes.lock().await[&mailbox_hash];
|
|
(
|
|
m.imap_path().to_string(),
|
|
m.no_select,
|
|
m.permissions.clone(),
|
|
)
|
|
};
|
|
if no_select {
|
|
return Err(MeliError::new(format!(
|
|
"Trying to select a \\NoSelect mailbox: {}",
|
|
&imap_path
|
|
))
|
|
.set_kind(crate::error::ErrorKind::Bug));
|
|
}
|
|
self.send_command(format!("SELECT \"{}\"", imap_path).as_bytes())
|
|
.await?;
|
|
self.read_response(ret, RequiredResponses::SELECT_REQUIRED)
|
|
.await?;
|
|
debug!(
|
|
"{} select response {}",
|
|
imap_path,
|
|
String::from_utf8_lossy(&ret)
|
|
);
|
|
let select_response = protocol_parser::select_response(&ret).chain_err_summary(|| {
|
|
format!("Could not parse select response for mailbox {}", imap_path)
|
|
})?;
|
|
{
|
|
if self.uid_store.keep_offline_cache {
|
|
#[cfg(not(feature = "sqlite3"))]
|
|
let mut cache_handle = super::cache::DefaultCache::get(self.uid_store.clone())?;
|
|
#[cfg(feature = "sqlite3")]
|
|
let mut cache_handle = super::cache::Sqlite3Cache::get(self.uid_store.clone())?;
|
|
if let Err(err) = cache_handle.mailbox_state(mailbox_hash).and_then(|r| {
|
|
if r.is_none() {
|
|
cache_handle.clear(mailbox_hash, &select_response)
|
|
} else {
|
|
Ok(())
|
|
}
|
|
}) {
|
|
(self.uid_store.event_consumer)(
|
|
self.uid_store.account_hash,
|
|
crate::backends::BackendEvent::from(err),
|
|
);
|
|
}
|
|
}
|
|
self.uid_store
|
|
.mailboxes
|
|
.lock()
|
|
.await
|
|
.entry(mailbox_hash)
|
|
.and_modify(|entry| {
|
|
*entry.select.write().unwrap() = Some(select_response.clone());
|
|
});
|
|
}
|
|
{
|
|
let mut permissions = permissions.lock().unwrap();
|
|
permissions.create_messages = !select_response.read_only;
|
|
permissions.remove_messages = !select_response.read_only;
|
|
permissions.set_flags = !select_response.read_only;
|
|
permissions.rename_messages = !select_response.read_only;
|
|
permissions.delete_messages = !select_response.read_only;
|
|
}
|
|
self.stream.as_mut()?.current_mailbox = MailboxSelection::Select(mailbox_hash);
|
|
if self
|
|
.uid_store
|
|
.msn_index
|
|
.lock()
|
|
.unwrap()
|
|
.get(&mailbox_hash)
|
|
.map(|i| i.is_empty())
|
|
.unwrap_or(true)
|
|
{
|
|
self.create_uid_msn_cache(mailbox_hash, 1, &select_response)
|
|
.await?;
|
|
}
|
|
Ok(Some(select_response))
|
|
}
|
|
|
|
pub async fn examine_mailbox(
|
|
&mut self,
|
|
mailbox_hash: MailboxHash,
|
|
ret: &mut Vec<u8>,
|
|
force: bool,
|
|
) -> Result<Option<SelectResponse>> {
|
|
if !force
|
|
&& self.stream.as_ref()?.current_mailbox == MailboxSelection::Examine(mailbox_hash)
|
|
{
|
|
return Ok(None);
|
|
}
|
|
let (imap_path, no_select) = {
|
|
let m = &self.uid_store.mailboxes.lock().await[&mailbox_hash];
|
|
(m.imap_path().to_string(), m.no_select)
|
|
};
|
|
if no_select {
|
|
return Err(MeliError::new(format!(
|
|
"Trying to examine a \\NoSelect mailbox: {}",
|
|
&imap_path
|
|
))
|
|
.set_kind(crate::error::ErrorKind::Bug));
|
|
}
|
|
self.send_command(format!("EXAMINE \"{}\"", &imap_path).as_bytes())
|
|
.await?;
|
|
self.read_response(ret, RequiredResponses::EXAMINE_REQUIRED)
|
|
.await?;
|
|
debug!("examine response {}", String::from_utf8_lossy(&ret));
|
|
let select_response = protocol_parser::select_response(&ret).chain_err_summary(|| {
|
|
format!("Could not parse select response for mailbox {}", imap_path)
|
|
})?;
|
|
self.stream.as_mut()?.current_mailbox = MailboxSelection::Examine(mailbox_hash);
|
|
if !self
|
|
.uid_store
|
|
.msn_index
|
|
.lock()
|
|
.unwrap()
|
|
.get(&mailbox_hash)
|
|
.map(|i| i.is_empty())
|
|
.unwrap_or(true)
|
|
{
|
|
self.create_uid_msn_cache(mailbox_hash, 1, &select_response)
|
|
.await?;
|
|
}
|
|
Ok(Some(select_response))
|
|
}
|
|
|
|
pub async fn unselect(&mut self) -> Result<()> {
|
|
match self.stream.as_mut()?.current_mailbox.take() {
|
|
MailboxSelection::Examine(_) |
|
|
MailboxSelection::Select(_) => {
|
|
let mut response = Vec::with_capacity(8 * 1024);
|
|
if self
|
|
.uid_store
|
|
.capabilities
|
|
.lock()
|
|
.unwrap()
|
|
.iter()
|
|
.any(|cap| cap.eq_ignore_ascii_case(b"UNSELECT"))
|
|
{
|
|
self.send_command(b"UNSELECT").await?;
|
|
self.read_response(&mut response, RequiredResponses::empty())
|
|
.await?;
|
|
} else {
|
|
/* `RFC3691 - UNSELECT Command` states: "[..] IMAP4 provides this
|
|
* functionality (via a SELECT command with a nonexistent mailbox name or
|
|
* reselecting the same mailbox with EXAMINE command)[..]
|
|
*/
|
|
let mut nonexistent = "blurdybloop".to_string();
|
|
{
|
|
let mailboxes = self.uid_store.mailboxes.lock().await;
|
|
while mailboxes.values().any(|m| m.imap_path() == nonexistent) {
|
|
nonexistent.push('p');
|
|
}
|
|
}
|
|
self.send_command(
|
|
format!(
|
|
"SELECT \"{}\"",
|
|
nonexistent
|
|
)
|
|
.as_bytes(),
|
|
)
|
|
.await?;
|
|
self.read_response(&mut response, RequiredResponses::NO_REQUIRED)
|
|
.await?;
|
|
}
|
|
}
|
|
MailboxSelection::None => {},
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
pub fn add_refresh_event(&mut self, ev: RefreshEvent) {
|
|
(self.uid_store.event_consumer)(
|
|
self.uid_store.account_hash,
|
|
crate::backends::BackendEvent::Refresh(ev),
|
|
);
|
|
}
|
|
|
|
async fn create_uid_msn_cache(
|
|
&mut self,
|
|
mailbox_hash: MailboxHash,
|
|
low: usize,
|
|
_select_response: &SelectResponse,
|
|
) -> Result<()> {
|
|
debug_assert!(low > 0);
|
|
let mut response = Vec::new();
|
|
self.send_command(format!("UID SEARCH {}:*", low).as_bytes())
|
|
.await?;
|
|
self.read_response(&mut response, RequiredResponses::SEARCH)
|
|
.await?;
|
|
let mut msn_index_lck = self.uid_store.msn_index.lock().unwrap();
|
|
let msn_index = msn_index_lck.entry(mailbox_hash).or_default();
|
|
let _ = msn_index.drain(low - 1..);
|
|
msn_index.extend(protocol_parser::search_results(&response)?.1.into_iter());
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
pub struct ImapBlockingConnection {
|
|
buf: Vec<u8>,
|
|
result: Vec<u8>,
|
|
prev_res_length: usize,
|
|
pub conn: ImapConnection,
|
|
err: Option<MeliError>,
|
|
}
|
|
|
|
impl From<ImapConnection> for ImapBlockingConnection {
|
|
fn from(conn: ImapConnection) -> Self {
|
|
ImapBlockingConnection {
|
|
buf: vec![0; Connection::IO_BUF_SIZE],
|
|
conn,
|
|
prev_res_length: 0,
|
|
result: Vec::with_capacity(8 * 1024),
|
|
err: None,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ImapBlockingConnection {
|
|
pub fn into_conn(self) -> ImapConnection {
|
|
self.conn
|
|
}
|
|
|
|
pub fn err(&mut self) -> Option<MeliError> {
|
|
self.err.take()
|
|
}
|
|
|
|
pub fn as_stream<'a>(&'a mut self) -> impl Future<Output = Option<Vec<u8>>> + 'a {
|
|
self.result.drain(0..self.prev_res_length);
|
|
self.prev_res_length = 0;
|
|
let mut break_flag = false;
|
|
let mut prev_failure = None;
|
|
async move {
|
|
if self.conn.stream.is_err() {
|
|
debug!(&self.conn.stream);
|
|
return None;
|
|
}
|
|
loop {
|
|
if let Some(y) = read(self, &mut break_flag, &mut prev_failure).await {
|
|
return Some(y);
|
|
}
|
|
if break_flag {
|
|
return None;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
async fn read(
|
|
conn: &mut ImapBlockingConnection,
|
|
break_flag: &mut bool,
|
|
prev_failure: &mut Option<SystemTime>,
|
|
) -> Option<Vec<u8>> {
|
|
let ImapBlockingConnection {
|
|
ref mut prev_res_length,
|
|
ref mut result,
|
|
ref mut conn,
|
|
ref mut buf,
|
|
ref mut err,
|
|
} = conn;
|
|
|
|
match conn.stream.as_mut().unwrap().stream.read(buf).await {
|
|
Ok(0) => {
|
|
*break_flag = true;
|
|
}
|
|
Ok(b) => {
|
|
result.extend_from_slice(&buf[0..b]);
|
|
debug!(unsafe { std::str::from_utf8_unchecked(result) });
|
|
if let Some(pos) = result.find(b"\r\n") {
|
|
*prev_res_length = pos + b"\r\n".len();
|
|
return Some(result[0..*prev_res_length].to_vec());
|
|
}
|
|
*prev_failure = None;
|
|
}
|
|
Err(_err) => {
|
|
debug!(&conn.stream);
|
|
debug!(&_err);
|
|
*err = Some(Into::<MeliError>::into(_err).set_kind(crate::error::ErrorKind::Network));
|
|
*break_flag = true;
|
|
*prev_failure = Some(SystemTime::now());
|
|
}
|
|
}
|
|
None
|
|
}
|