652 lines
28 KiB
Rust
652 lines
28 KiB
Rust
/*
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* meli - mailbox module.
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*
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* Copyright 2017 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::{MaildirFolder, MaildirOp};
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use crate::async_workers::*;
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use crate::conf::AccountSettings;
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use crate::error::{MeliError, Result};
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use super::{
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BackendFolder, BackendOp, Folder, FolderHash, MailBackend, RefreshEvent, RefreshEventConsumer,
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RefreshEventKind::*,
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};
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use crate::mailbox::email::{Envelope, EnvelopeHash};
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use notify::{watcher, DebouncedEvent, RecursiveMode, Watcher};
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use std::time::Duration;
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use std::sync::mpsc::channel;
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//use std::sync::mpsc::sync_channel;
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//use std::sync::mpsc::SyncSender;
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//use std::time::Duration;
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use std::thread;
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use fnv::{FnvHashMap, FnvHasher};
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use std::collections::hash_map::DefaultHasher;
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use std::ffi::OsStr;
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use std::fs;
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use std::hash::{Hash, Hasher};
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use std::io::{self, Read, Write};
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use std::ops::{Deref, DerefMut};
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use std::path::{Component, Path, PathBuf};
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use std::result;
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use std::sync::{Arc, Mutex};
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#[derive(Debug, Default)]
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pub struct HashIndex {
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index: FnvHashMap<EnvelopeHash, PathBuf>,
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hash: FolderHash,
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}
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impl Deref for HashIndex {
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type Target = FnvHashMap<EnvelopeHash, PathBuf>;
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fn deref(&self) -> &FnvHashMap<EnvelopeHash, PathBuf> {
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&self.index
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}
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}
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impl DerefMut for HashIndex {
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fn deref_mut(&mut self) -> &mut FnvHashMap<EnvelopeHash, PathBuf> {
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&mut self.index
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}
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}
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pub type HashIndexes = Arc<Mutex<FnvHashMap<FolderHash, HashIndex>>>;
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/// Maildir backend https://cr.yp.to/proto/maildir.html
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#[derive(Debug)]
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pub struct MaildirType {
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name: String,
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folders: Vec<MaildirFolder>,
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//folder_index: FnvHashMap<FolderHash, usize>,
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hash_indexes: HashIndexes,
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path: PathBuf,
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}
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macro_rules! path_is_new {
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($path:expr) => {
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if $path.is_dir() {
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false
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} else {
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let mut iter = $path.components().rev();
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iter.next();
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iter.next() == Some(Component::Normal(OsStr::new("new")))
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}
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};
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}
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macro_rules! get_path_hash {
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($path:expr) => {{
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let mut path = $path.clone();
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if path.is_dir() {
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if path.ends_with("cur") | path.ends_with("new") {
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path.pop();
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}
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} else {
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path.pop();
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path.pop();
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};
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let mut hasher = DefaultHasher::new();
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path.hash(&mut hasher);
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hasher.finish()
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}};
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}
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fn get_file_hash(file: &Path) -> EnvelopeHash {
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/*
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let mut buf = Vec::with_capacity(2048);
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let mut f = fs::File::open(&file).unwrap_or_else(|_| panic!("Can't open {}", file.display()));
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f.read_to_end(&mut buf)
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.unwrap_or_else(|_| panic!("Can't read {}", file.display()));
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let mut hasher = FnvHasher::default();
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hasher.write(&buf);
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hasher.finish()
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*/
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let mut hasher = FnvHasher::default();
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file.hash(&mut hasher);
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hasher.finish()
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}
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fn move_to_cur(p: PathBuf) -> PathBuf {
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let mut new = p.clone();
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{
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let file_name = p.file_name().unwrap();
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new.pop();
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new.pop();
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new.push("cur");
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new.push(file_name);
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new.set_extension(":2,");
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}
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if cfg!(feature = "debug_log") {
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eprintln!("moved to cur: {}", new.display());
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}
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fs::rename(p, &new).unwrap();
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new
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}
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impl MailBackend for MaildirType {
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fn folders(&self) -> Vec<Folder> {
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self.folders.iter().map(|f| f.clone()).collect()
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}
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fn get(&mut self, folder: &Folder) -> Async<Result<Vec<Envelope>>> {
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self.multicore(4, folder)
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}
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fn watch(&self, sender: RefreshEventConsumer) -> Result<()> {
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let (tx, rx) = channel();
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let mut watcher = watcher(tx, Duration::from_secs(1)).unwrap();
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let root_path = self.path.to_path_buf();
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let cache_dir = xdg::BaseDirectories::with_profile("meli", &self.name).unwrap();
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for f in &self.folders {
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if f.is_valid().is_err() {
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continue;
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}
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if cfg!(feature = "debug_log") {
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eprintln!("watching {:?}", f);
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}
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let mut p = PathBuf::from(&f.path);
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p.push("cur");
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watcher.watch(&p, RecursiveMode::NonRecursive).unwrap();
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p.pop();
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p.push("new");
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watcher.watch(&p, RecursiveMode::NonRecursive).unwrap();
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}
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let hash_indexes = self.hash_indexes.clone();
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thread::Builder::new()
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.name("folder watch".to_string())
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.spawn(move || {
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// Move `watcher` in the closure's scope so that it doesn't get dropped.
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let _watcher = watcher;
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loop {
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match rx.recv() {
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/*
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* Event types:
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*
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* pub enum RefreshEventKind {
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* Update(EnvelopeHash, Envelope), // Old hash, new envelope
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* Create(Envelope),
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* Remove(EnvelopeHash),
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* Rescan,
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* }
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*/
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Ok(event) => match event {
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/* Create */
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DebouncedEvent::Create(mut pathbuf) => {
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if path_is_new!(pathbuf) {
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pathbuf = move_to_cur(pathbuf);
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}
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let folder_hash = get_path_hash!(pathbuf);
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let file_name = pathbuf
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.as_path()
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.strip_prefix(&root_path)
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.unwrap()
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.to_path_buf();
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if let Some(env) = add_path_to_index(
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&hash_indexes,
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folder_hash,
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pathbuf.as_path(),
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&cache_dir,
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file_name,
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) {
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if cfg!(feature = "debug_log") {
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eprintln!("Create event {} {} {}", env.hash(), env.subject(), pathbuf.display());
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}
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sender.send(RefreshEvent {
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hash: folder_hash,
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kind: Create(Box::new(env)),
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});
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} else {
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continue;
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}
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}
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/* Update */
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DebouncedEvent::NoticeWrite(mut pathbuf)
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| DebouncedEvent::Write(mut pathbuf) => {
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let folder_hash = get_path_hash!(pathbuf);
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let mut hash_indexes_lock = hash_indexes.lock().unwrap();
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let index_lock = &mut hash_indexes_lock.entry(folder_hash).or_default();
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let file_name = pathbuf
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.as_path()
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.strip_prefix(&root_path)
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.unwrap()
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.to_path_buf();
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/* Linear search in hash_index to find old hash */
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let old_hash: EnvelopeHash = {
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if let Some((k, v)) =
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index_lock.iter_mut().find(|(_, v)| **v == pathbuf)
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{
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//TODO FIXME This doesn't make sense?
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*v = pathbuf.clone();
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*k
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} else {
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/* Did we just miss a Create event? In any case, create
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* envelope. */
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if let Some(env) = add_path_to_index(
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&hash_indexes,
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folder_hash,
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pathbuf.as_path(),
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&cache_dir,
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file_name,
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) {
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sender.send(RefreshEvent {
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hash: folder_hash,
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kind: Create(Box::new(env)),
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});
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}
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return;
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}
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};
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let new_hash: EnvelopeHash = get_file_hash(pathbuf.as_path());
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if index_lock.get_mut(&new_hash).is_none() {
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let op = Box::new(MaildirOp::new(new_hash, hash_indexes.clone(), folder_hash));
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if let Some(env) = Envelope::from_token(op, new_hash) {
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if cfg!(feature = "debug_log") {
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eprintln!("{}\t{}", new_hash, pathbuf.display());
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}
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index_lock.insert(new_hash, pathbuf);
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/* Send Write notice */
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sender.send(RefreshEvent {
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hash: folder_hash,
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kind: Update(old_hash, Box::new(env)),
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});
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} else {
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if cfg!(feature = "debug_log") {
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eprintln!("DEBUG: hash {}, path: {} couldn't be parsed in `add_path_to_index`", new_hash, pathbuf.as_path().display());
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}
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}
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}
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}
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/* Remove */
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DebouncedEvent::NoticeRemove(mut pathbuf)
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| DebouncedEvent::Remove(mut pathbuf) => {
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let folder_hash = get_path_hash!(pathbuf);
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let mut hash_indexes_lock = hash_indexes.lock().unwrap();
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let index_lock = hash_indexes_lock.entry(folder_hash).or_default();
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let hash: EnvelopeHash = if let Some((k, _)) =
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index_lock.iter().find(|(_, v)| **v == pathbuf)
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{
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*k
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} else {
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continue;
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};
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index_lock.remove(&hash);
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sender.send(RefreshEvent {
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hash: folder_hash,
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kind: Remove(hash),
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});
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}
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/* Envelope hasn't changed, so handle this here */
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DebouncedEvent::Rename(mut src, mut dest) => {
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let folder_hash = get_path_hash!(src);
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let old_hash: EnvelopeHash = get_file_hash(src.as_path());
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let new_hash: EnvelopeHash = get_file_hash(dest.as_path());
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let mut hash_indexes_lock = hash_indexes.lock().unwrap();
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let index_lock = hash_indexes_lock.entry(folder_hash).or_default();
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if index_lock.contains_key(&old_hash) {
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sender.send(RefreshEvent {
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hash: get_path_hash!(dest),
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kind: Rename(old_hash, new_hash),
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});
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index_lock.remove(&old_hash);
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index_lock.insert(new_hash, dest);
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} else {
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/* Maybe a re-read should be triggered here just to be safe. */
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sender.send(RefreshEvent {
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hash: get_path_hash!(dest),
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kind: Rescan,
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});
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}
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}
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/* Trigger rescan of folder */
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DebouncedEvent::Rescan => {
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/* Actually should rescan all folders */
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unreachable!("Unimplemented: rescan of all folders in MaildirType")
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}
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_ => {}
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},
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Err(e) => eprintln!("watch error: {:?}", e),
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}
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}
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})?;
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Ok(())
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}
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fn operation(&self, hash: EnvelopeHash, folder_hash: FolderHash) -> Box<BackendOp> {
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Box::new(MaildirOp::new(hash, self.hash_indexes.clone(), folder_hash))
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}
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fn save(&self, bytes: &[u8], folder: &str) -> Result<()> {
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for f in &self.folders {
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if f.name == folder {
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let mut path = f.path.clone();
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path.push("cur");
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{
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let mut rand_buf = [0u8; 16];
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let mut f = fs::File::open("/dev/urandom").expect("Could not open /dev/urandom for reading");
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f.read_exact(&mut rand_buf).expect("Could not read from /dev/urandom/");
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let mut hostn_buf = String::with_capacity(256);
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let mut f = fs::File::open("/etc/hostname").expect("Could not open /etc/hostname for reading");
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f.read_to_string(&mut hostn_buf).expect("Could not read from /etc/hostname");
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let timestamp = std::time::SystemTime::now().duration_since(std::time::SystemTime::UNIX_EPOCH).unwrap().as_millis();
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path.push(&format!("{}.{:x}_{}.{}:2,", timestamp, u128::from_be_bytes(rand_buf), std::process::id(), hostn_buf.trim()));
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}
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if cfg!(feature = "debug_log") {
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eprintln!("saving at {}", path.display());
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}
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let file = fs::File::create(path).unwrap();
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let mut writer = io::BufWriter::new(file);
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writer.write_all(bytes).unwrap();
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return Ok(());
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}
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}
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Err(MeliError::new(format!(
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"'{}' is not a valid folder.",
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folder
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)))
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}
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}
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impl MaildirType {
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pub fn new(f: &AccountSettings) -> Self {
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let mut folders: Vec<MaildirFolder> = Vec::new();
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fn recurse_folders<P: AsRef<Path>>(folders: &mut Vec<MaildirFolder>, p: P) -> Vec<usize> {
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let mut children = Vec::new();
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for mut f in fs::read_dir(p).unwrap() {
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for f in f.iter_mut() {
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{
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let path = f.path();
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if path.ends_with("cur") || path.ends_with("new") || path.ends_with("tmp") {
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continue;
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}
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if path.is_dir() {
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let path_children = recurse_folders(folders, &path);
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if let Ok(f) = MaildirFolder::new(
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path.to_str().unwrap().to_string(),
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path.file_name().unwrap().to_str().unwrap().to_string(),
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path_children,
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) {
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folders.push(f);
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children.push(folders.len() - 1);
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}
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}
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}
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}
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}
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children
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};
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let path = PathBuf::from(f.root_folder());
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if path.is_dir() {
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if let Ok(f) = MaildirFolder::new(
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path.to_str().unwrap().to_string(),
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path.file_name().unwrap().to_str().unwrap().to_string(),
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Vec::with_capacity(0),
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) {
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if f.is_valid().is_ok() {
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folders.push(f);
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}
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}
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}
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if folders.is_empty() {
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recurse_folders(&mut folders, &path);
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} else {
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folders[0].children = recurse_folders(&mut folders, &path);
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}
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let hash_indexes = Arc::new(Mutex::new(FnvHashMap::with_capacity_and_hasher(
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folders.len(),
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Default::default(),
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)));
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{
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let mut hash_indexes = hash_indexes.lock().unwrap();
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for f in &folders {
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hash_indexes.insert(
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f.hash(),
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HashIndex {
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index: FnvHashMap::with_capacity_and_hasher(0, Default::default()),
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hash: f.hash(),
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},
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);
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}
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}
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MaildirType {
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name: f.name().to_string(),
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folders,
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hash_indexes,
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path: PathBuf::from(f.root_folder()),
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}
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}
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fn owned_folder_idx(&self, folder: &Folder) -> usize {
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self.folders
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.iter()
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.enumerate()
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.find(|(_, f)| f.hash() == folder.hash())
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.unwrap()
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.0
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}
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pub fn multicore(&mut self, cores: usize, folder: &Folder) -> Async<Result<Vec<Envelope>>> {
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let mut w = AsyncBuilder::new();
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let cache_dir = xdg::BaseDirectories::with_profile("meli", &self.name).unwrap();
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let handle = {
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let tx = w.tx();
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// TODO: Avoid clone
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let folder: &MaildirFolder = &self.folders[self.owned_folder_idx(folder)];
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let folder_hash = folder.hash();
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let tx_final = w.tx();
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let path: PathBuf = folder.path().into();
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let name = format!("parsing {:?}", folder.name());
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let root_path = self.path.to_path_buf();
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let map = self.hash_indexes.clone();
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let closure = move || {
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let name = name.clone();
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let root_path = root_path.clone();
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let map = map.clone();
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let tx = tx.clone();
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let cache_dir = cache_dir.clone();
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let path = path.clone();
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let thunk = move || {
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let mut path = path.clone();
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let cache_dir = cache_dir.clone();
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path.push("new");
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for d in path.read_dir()? {
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if let Ok(p) = d {
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move_to_cur(p.path());
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}
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}
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path.pop();
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path.push("cur");
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let iter = path.read_dir()?;
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let count = path.read_dir()?.count();
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let mut files: Vec<PathBuf> = Vec::with_capacity(count);
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let mut ret = Vec::with_capacity(count);
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for e in iter {
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let e = e.and_then(|x| {
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let path = x.path();
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Ok(path)
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})?;
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files.push(e);
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}
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let mut threads = Vec::with_capacity(cores);
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if !files.is_empty() {
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crossbeam::scope(|scope| {
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let cache_dir = cache_dir.clone();
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let chunk_size = if count / cores > 0 {
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count / cores
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} else {
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count
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};
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for chunk in files.chunks(chunk_size) {
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let cache_dir = cache_dir.clone();
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|
let mut tx = tx.clone();
|
|
let map = map.clone();
|
|
let root_path = root_path.clone();
|
|
let s = scope.builder().name(name.clone()).spawn(move || {
|
|
let len = chunk.len();
|
|
let size = if len <= 100 { 100 } else { (len / 100) * 100 };
|
|
let mut local_r: Vec<
|
|
Envelope,
|
|
> = Vec::with_capacity(chunk.len());
|
|
for c in chunk.chunks(size) {
|
|
//thread::yield_now();
|
|
let map = map.clone();
|
|
let len = c.len();
|
|
for file in c {
|
|
|
|
/* Check if we have a cache file with this email's
|
|
* filename */
|
|
let file_name = PathBuf::from(file)
|
|
.strip_prefix(&root_path)
|
|
.unwrap()
|
|
.to_path_buf();
|
|
if let Some(cached) =
|
|
cache_dir.find_cache_file(&file_name)
|
|
{
|
|
/* Cached struct exists, try to load it */
|
|
let reader = io::BufReader::new(
|
|
fs::File::open(&cached).unwrap(),
|
|
);
|
|
let result: result::Result<Envelope, _> = bincode::deserialize_from(reader);
|
|
if let Ok(env) = result {
|
|
let mut map = map.lock().unwrap();
|
|
let mut map = map.entry(folder_hash).or_default();;
|
|
let hash = env.hash();
|
|
map.insert(hash, file.clone());
|
|
local_r.push(env);
|
|
continue;
|
|
}
|
|
};
|
|
let hash = get_file_hash(file);
|
|
{
|
|
let mut map = map.lock().unwrap();
|
|
let mut map = map.entry(folder_hash).or_default();
|
|
(*map).insert(hash, PathBuf::from(file));
|
|
}
|
|
let op =
|
|
Box::new(MaildirOp::new(hash, map.clone(), folder_hash));
|
|
if let Some(mut e) = Envelope::from_token(op, hash)
|
|
{
|
|
if let Ok(cached) =
|
|
cache_dir.place_cache_file(file_name)
|
|
{
|
|
/* place result in cache directory */
|
|
let f = match fs::File::create(cached) {
|
|
Ok(f) => f,
|
|
Err(e) => {
|
|
panic!("{}", e);
|
|
}
|
|
};
|
|
let writer = io::BufWriter::new(f);
|
|
bincode::serialize_into(writer, &e)
|
|
.unwrap();
|
|
}
|
|
local_r.push(e);
|
|
} else {
|
|
if cfg!(feature = "debug_log") {
|
|
eprintln!("DEBUG: hash {}, path: {} couldn't be parsed in `add_path_to_index`", hash, file.as_path().display());
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
tx.send(AsyncStatus::ProgressReport(len));
|
|
}
|
|
local_r
|
|
});
|
|
threads.push(s.unwrap());
|
|
}
|
|
});
|
|
}
|
|
for t in threads {
|
|
let mut result = t.join();
|
|
ret.append(&mut result);
|
|
}
|
|
Ok(ret)
|
|
};
|
|
let result = thunk();
|
|
tx_final.send(AsyncStatus::Payload(result));
|
|
};
|
|
Box::new(closure)
|
|
};
|
|
w.build(handle)
|
|
}
|
|
}
|
|
|
|
fn add_path_to_index(
|
|
hash_index: &HashIndexes,
|
|
folder_hash: FolderHash,
|
|
path: &Path,
|
|
cache_dir: &xdg::BaseDirectories,
|
|
file_name: PathBuf,
|
|
) -> Option<Envelope> {
|
|
let env: Envelope;
|
|
let hash = get_file_hash(path);
|
|
{
|
|
let mut map = hash_index.lock().unwrap();
|
|
let map = map.entry(folder_hash).or_default();;
|
|
map.insert(hash, path.to_path_buf());
|
|
eprintln!(
|
|
"inserted {} in {} map, len={}",
|
|
hash,
|
|
folder_hash,
|
|
map.len()
|
|
);
|
|
for e in map.iter() {
|
|
if cfg!(feature = "debug_log") {
|
|
eprintln!("{:#?}", e);
|
|
}
|
|
}
|
|
}
|
|
let op = Box::new(MaildirOp::new(hash, hash_index.clone(), folder_hash));
|
|
if let Some(e) = Envelope::from_token(op, hash) {
|
|
if cfg!(feature = "debug_log") {
|
|
eprintln!("add_path_to_index gen {}\t{}", hash, file_name.display());
|
|
}
|
|
if let Ok(cached) = cache_dir.place_cache_file(file_name) {
|
|
/* place result in cache directory */
|
|
let f = match fs::File::create(cached) {
|
|
Ok(f) => f,
|
|
Err(e) => {
|
|
panic!("{}", e);
|
|
}
|
|
};
|
|
let writer = io::BufWriter::new(f);
|
|
bincode::serialize_into(writer, &e).unwrap();
|
|
}
|
|
env = e;
|
|
} else {
|
|
eprintln!(
|
|
"DEBUG: hash {}, path: {} couldn't be parsed in `add_path_to_index`",
|
|
hash,
|
|
path.display()
|
|
);
|
|
return None;
|
|
}
|
|
Some(env)
|
|
}
|