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Implement Serve feature

This commit is contained in:
Boris-Chengbiao Zhou 2016-04-02 04:46:05 +02:00
parent c3564f1699
commit e861880f95
7 changed files with 372 additions and 66 deletions
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8
Cargo.toml
View File

@ -25,6 +25,11 @@ notify = { version = "2.5.4", optional = true }
time = { version = "0.1.34", optional = true }
crossbeam = { version = "0.2.8", optional = true }
# Serve feature
iron = { version = "0.3", optional = true }
staticfile = { version = "0.2", optional = true }
websocket = { version = "0.16.1", optional = true}
# Tests
[dev-dependencies]
@ -32,11 +37,12 @@ tempdir = "0.3.4"
[features]
default = ["output", "watch"]
default = ["output", "watch", "serve"]
debug = []
output = []
regenerate-css = []
watch = ["notify", "time", "crossbeam"]
serve = ["iron", "staticfile", "websocket"]
[[bin]]
doc = false

210
src/bin/livereload.rs Normal file
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@ -0,0 +1,210 @@
extern crate websocket;
extern crate crossbeam;
use std::sync::mpsc::channel;
use std::sync::mpsc;
use std::io;
use std::thread;
use std::sync::{Arc, Mutex};
use std::ops::Deref;
use std::marker::PhantomData;
use self::websocket::header::WebSocketProtocol;
use self::websocket::ws::sender::Sender;
use self::websocket::ws::receiver::Receiver;
use self::websocket::message::Type;
use self::websocket::{Server, Message};
const WS_PROTOCOL: &'static str = "livereload";
const RELOAD_COMMAND: &'static str = "reload";
#[derive(Debug, Clone, PartialEq)]
enum MessageType {
Reload,
Close,
}
#[derive(Clone)]
struct ComparableSender<T> {
sender: mpsc::Sender<T>,
id: usize,
}
impl<T> PartialEq for ComparableSender<T> {
fn eq(&self, other: &Self) -> bool {
self.id == other.id
}
}
impl<T> Deref for ComparableSender<T> {
type Target = mpsc::Sender<T>;
fn deref(&self) -> &mpsc::Sender<T> {
&self.sender
}
}
struct ComparableSenderFactory<T> {
next_id: usize,
sender_type: PhantomData<T>,
}
impl<T> ComparableSenderFactory<T> {
fn generate(&mut self, sender: mpsc::Sender<T>) -> ComparableSender<T> {
let tx = ComparableSender {
sender: sender,
id: self.next_id,
};
self.next_id += 1;
tx
}
fn new() -> ComparableSenderFactory<T> {
ComparableSenderFactory {
next_id: 0,
sender_type: PhantomData,
}
}
}
pub struct LiveReload {
senders: Arc<Mutex<Vec<ComparableSender<MessageType>>>>,
}
impl LiveReload {
pub fn new(address: &str) -> io::Result<LiveReload> {
let server = try!(Server::bind(address));
let senders: Arc<Mutex<Vec<ComparableSender<MessageType>>>> = Arc::new(Mutex::new(vec![]));
let senders_clone = senders.clone();
let mut factory = ComparableSenderFactory::new();
let lr = LiveReload { senders: senders_clone };
// handle connection attempts on a separate thread
thread::spawn(move || {
for connection in server {
let mut senders = senders.clone();
let (tx, rx) = channel();
let tx = factory.generate(tx);
senders.lock().unwrap().push(tx.clone());
// each connection gets a separate thread
thread::spawn(move || {
let request = connection.unwrap().read_request().unwrap();
let headers = request.headers.clone();
let mut valid = false;
if let Some(&WebSocketProtocol(ref protocols)) = headers.get() {
if protocols.contains(&(WS_PROTOCOL.to_owned())) {
valid = true;
}
}
let client;
if valid {
let mut response = request.accept();
response.headers.set(WebSocketProtocol(vec![WS_PROTOCOL.to_owned()]));
client = response.send().unwrap();
} else {
request.fail().send().unwrap();
println!("{:?}", "Rejecting invalid websocket request.");
return;
}
let (mut ws_tx, mut ws_rx) = client.split();
// handle receiving and sending (websocket) in two separate threads
crossbeam::scope(|scope| {
let tx_clone = tx.clone();
scope.spawn(move || {
let tx = tx_clone;
loop {
match rx.recv() {
Ok(msg) => {
match msg {
MessageType::Reload => {
let message: Message = Message::text(RELOAD_COMMAND.to_owned());
let mut senders = senders.clone();
if ws_tx.send_message(&message).is_err() {
// the receiver isn't available anymore
// remove the tx from senders and exit
LiveReload::remove_sender(&mut senders, &tx);
break;
}
},
MessageType::Close => {
LiveReload::remove_sender(&mut senders, &tx);
break;
},
}
},
Err(e) => {
println!("{:?}", e);
break;
},
}
}
});
for message in ws_rx.incoming_messages() {
match message {
Ok(message) => {
let message: Message = message;
match message.opcode {
Type::Close => {
tx.send(MessageType::Close).unwrap();
break;
},
// TODO ?
// Type::Ping => {
// let message = websocket::Message::pong(message.payload);
// ws_tx.send_message(&message).unwrap();
// },
_ => {
println!("{:?}", message.opcode);
unimplemented!()
},
}
},
Err(err) => {
println!("Error: {}", err);
break;
},
}
}
});
});
}
});
Ok(lr)
}
fn remove_sender(senders: &mut Arc<Mutex<Vec<ComparableSender<MessageType>>>>, el: &ComparableSender<MessageType>) {
let mut senders = senders.lock().unwrap();
let mut index = 0;
for i in 0..senders.len() {
if &senders[i] == el {
index = i;
break;
}
}
senders.remove(index);
}
pub fn trigger_reload(&self) {
let senders = self.senders.lock().unwrap();
println!("Reloading {} client(s).", senders.len());
for sender in senders.iter() {
sender.send(MessageType::Reload).unwrap();
}
}
}

178
src/bin/mdbook.rs
View File

@ -10,6 +10,14 @@ extern crate notify;
#[cfg(feature = "watch")]
extern crate time;
// Dependencies for the Serve feature
#[cfg(feature = "serve")]
extern crate iron;
#[cfg(feature = "serve")]
extern crate staticfile;
#[cfg(feature = "serve")]
mod livereload;
use std::env;
use std::error::Error;
@ -24,6 +32,10 @@ use notify::Watcher;
#[cfg(feature = "watch")]
use std::sync::mpsc::channel;
// Uses for the Serve feature
#[cfg(feature = "serve")]
use livereload::LiveReload;
use mdbook::MDBook;
@ -50,6 +62,11 @@ fn main() {
.subcommand(SubCommand::with_name("watch")
.about("Watch the files for changes")
.arg_from_usage("[dir] 'A directory for your book{n}(Defaults to Current Directory when ommitted)'"))
.subcommand(SubCommand::with_name("serve")
.about("Serve the book at http://localhost:3000. Rebuild and reload on change.")
.arg_from_usage("[dir] 'A directory for your book{n}(Defaults to Current Directory when ommitted)'")
.arg_from_usage("-p, --port=[port] 'Use another port{n}(Defaults to 3000)'")
.arg_from_usage("-w, --websocket-port=[ws-port] 'Use another port for the websocket connection (livereload){n}(Defaults to 3001)'"))
.subcommand(SubCommand::with_name("test")
.about("Test that code samples compile"))
.get_matches();
@ -60,6 +77,8 @@ fn main() {
("build", Some(sub_matches)) => build(sub_matches),
#[cfg(feature = "watch")]
("watch", Some(sub_matches)) => watch(sub_matches),
#[cfg(feature = "serve")]
("serve", Some(sub_matches)) => serve(sub_matches),
("test", Some(sub_matches)) => test(sub_matches),
(_, _) => unreachable!(),
};
@ -148,76 +167,70 @@ fn build(args: &ArgMatches) -> Result<(), Box<Error>> {
#[cfg(feature = "watch")]
fn watch(args: &ArgMatches) -> Result<(), Box<Error>> {
let book_dir = get_book_dir(args);
let book = MDBook::new(&book_dir).read_config();
// Create a channel to receive the events.
let (tx, rx) = channel();
let w: Result<notify::RecommendedWatcher, notify::Error> = notify::Watcher::new(tx);
match w {
Ok(mut watcher) => {
// Add the source directory to the watcher
if let Err(e) = watcher.watch(book.get_src()) {
println!("Error while watching {:?}:\n {:?}", book.get_src(), e);
::std::process::exit(0);
};
// Add the book.json file to the watcher if it exists, because it's not
// located in the source directory
if let Err(_) = watcher.watch(book_dir.join("book.json")) {
// do nothing if book.json is not found
}
let mut previous_time = time::get_time();
crossbeam::scope(|scope| {
loop {
match rx.recv() {
Ok(event) => {
// Skip the event if an event has already been issued in the last second
let time = time::get_time();
if time - previous_time < time::Duration::seconds(1) {
continue;
} else {
previous_time = time;
}
let mut book = MDBook::new(&book_dir).read_config();
trigger_on_change(&mut book, |event, book| {
if let Some(path) = event.path {
// Trigger the build process in a new thread (to keep receiving events)
scope.spawn(move || {
println!("File changed: {:?}\nBuilding book...\n", path);
match build(args) {
match book.build() {
Err(e) => println!("Error while building: {:?}", e),
_ => {},
}
println!("");
});
} else {
continue;
}
},
Err(e) => {
println!("An error occured: {:?}", e);
},
}
}
});
},
Err(e) => {
println!("Error while trying to watch the files:\n\n\t{:?}", e);
::std::process::exit(0);
},
}
Ok(())
}
// Watch command implementation
#[cfg(feature = "serve")]
fn serve(args: &ArgMatches) -> Result<(), Box<Error>> {
let book_dir = get_book_dir(args);
let mut book = MDBook::new(&book_dir).read_config();
let port = args.value_of("port").unwrap_or("3000");
let ws_port = args.value_of("ws-port").unwrap_or("3001");
book.set_livereload(format!(r#"
<script type="text/javascript">
var socket = new WebSocket("ws://localhost:{}", "livereload");
socket.onmessage = function (event) {{
if (event.data === "reload") {{
socket.close();
location.reload(true); // force reload from server (not from cache)
}}
}};
window.onbeforeunload = function() {{
socket.close();
}}
</script>
"#, ws_port).to_owned());
try!(book.build());
let staticfile = staticfile::Static::new(book.get_dest());
let iron = iron::Iron::new(staticfile);
let _iron = iron.http(&*format!("localhost:{}", port)).unwrap();
let lr = LiveReload::new(&format!("localhost:{}", ws_port)).unwrap();
println!("{:?}", "Registering change trigger");
trigger_on_change(&mut book, move |event, book| {
if let Some(path) = event.path {
println!("File changed: {:?}\nBuilding book...\n", path);
match book.build() {
Err(e) => println!("Error while building: {:?}", e),
_ => lr.trigger_reload(),
}
println!("");
}
});
Ok(())
}
fn test(args: &ArgMatches) -> Result<(), Box<Error>> {
let book_dir = get_book_dir(args);
@ -229,7 +242,6 @@ fn test(args: &ArgMatches) -> Result<(), Box<Error>> {
}
fn get_book_dir(args: &ArgMatches) -> PathBuf {
if let Some(dir) = args.value_of("dir") {
// Check if path is relative from current dir, or absolute...
@ -243,3 +255,55 @@ fn get_book_dir(args: &ArgMatches) -> PathBuf {
env::current_dir().unwrap()
}
}
// Calls the closure when a book source file is changed. This is blocking!
fn trigger_on_change<F>(book: &mut MDBook, closure: F) -> ()
where F: Fn(notify::Event, &mut MDBook) -> ()
{
// Create a channel to receive the events.
let (tx, rx) = channel();
let w: Result<notify::RecommendedWatcher, notify::Error> = notify::Watcher::new(tx);
match w {
Ok(mut watcher) => {
// Add the source directory to the watcher
if let Err(e) = watcher.watch(book.get_src()) {
println!("Error while watching {:?}:\n {:?}", book.get_src(), e);
::std::process::exit(0);
};
// Add the book.json file to the watcher if it exists, because it's not
// located in the source directory
if let Err(_) = watcher.watch(book.get_root().join("book.json")) {
// do nothing if book.json is not found
}
let mut previous_time = time::get_time();
loop {
match rx.recv() {
Ok(event) => {
// Skip the event if an event has already been issued in the last second
let time = time::get_time();
if time - previous_time < time::Duration::seconds(1) {
continue;
} else {
previous_time = time;
}
closure(event, book);
},
Err(e) => {
println!("An error occured: {:?}", e);
},
}
}
},
Err(e) => {
println!("Error while trying to watch the files:\n\n\t{:?}", e);
::std::process::exit(0);
},
}
}

20
src/book/mdbook.rs
View File

@ -15,6 +15,8 @@ pub struct MDBook {
config: BookConfig,
pub content: Vec<BookItem>,
renderer: Box<Renderer>,
#[cfg(feature = "serve")]
livereload: Option<String>,
}
impl MDBook {
@ -38,6 +40,7 @@ impl MDBook {
.set_dest(&root.join("book"))
.to_owned(),
renderer: Box::new(HtmlHandlebars::new()),
livereload: None,
}
}
@ -398,6 +401,23 @@ impl MDBook {
&self.config.description
}
pub fn set_livereload(&mut self, livereload: String) -> &mut Self {
self.livereload = Some(livereload);
self
}
pub fn unset_livereload(&mut self) -> &Self {
self.livereload = None;
self
}
pub fn get_livereload(&self) -> Option<&String> {
match self.livereload {
Some(ref livereload) => Some(&livereload),
None => None,
}
}
// Construct book
fn parse_summary(&mut self) -> Result<(), Box<Error>> {
// When append becomes stable, use self.content.append() ...

3
src/renderer/html_handlebars/hbs_renderer.rs
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@ -287,6 +287,9 @@ fn make_data(book: &MDBook) -> Result<BTreeMap<String, Json>, Box<Error>> {
data.insert("title".to_owned(), book.get_title().to_json());
data.insert("description".to_owned(), book.get_description().to_json());
data.insert("favicon".to_owned(), "favicon.png".to_json());
if let Some(livereload) = book.get_livereload() {
data.insert("livereload".to_owned(), livereload.to_json());
}
let mut chapters = vec![];

3
src/theme/index.hbs
View File

@ -107,6 +107,9 @@
}
</script>
<!-- Livereload script (if served using the cli tool) -->
{{{livereload}}}
<script src="highlight.js"></script>
<script src="book.js"></script>
</body>

2
src/utils/fs.rs
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@ -150,7 +150,7 @@ pub fn copy_files_except_ext(from: &Path, to: &Path, recursive: bool, ext_blackl
debug!("[*] creating path for file: {:?}",
&to.join(entry.path().file_name().expect("a file should have a file name...")));
output!("[*] copying file: {:?}\n to {:?}",
output!("[*] Copying file: {:?}\n to {:?}",
entry.path(),
&to.join(entry.path().file_name().expect("a file should have a file name...")));
try!(fs::copy(entry.path(),