1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162

/// Copied from https://raw.githubusercontent.com/rust-lang-nursery/mdBook/3688f73052454bf510a5acc85cf55aae450c6e46/src/cmd/serve.rs
/// from commit 3688f73 on https://github.com/rust-lang-nursery/mdBook/
extern crate iron;
extern crate staticfile;
extern crate ws;

use self::iron::{
    status,
    AfterMiddleware,
    Chain,
    Iron,
    IronError,
    IronResult,
    Request,
    Response,
    Set,
};
// #[cfg(feature = "watch")]
use super::watch;
use clap::{
    App,
    Arg,
    ArgMatches,
    SubCommand,
};
use mdbook::errors::*;
use mdbook::MDBook;
use std;
use std::path::Path;

struct ErrorRecover;

// Create clap subcommand arguments
pub fn make_subcommand<'a, 'b>() -> App<'a, 'b> {
    SubCommand::with_name("serve")
        .about("Serves a book at http://localhost:3000, and rebuilds it on changes")
        .arg_from_usage(
            "-d, --dest-dir=[dest-dir] 'Output directory for the book{n}\
             (If omitted, uses build.build-dir from book.toml or defaults to ./book)'",
        )
        .arg_from_usage(
            "[dir] 'Root directory for the book{n}\
             (Defaults to the Current Directory when omitted)'",
        )
        .arg(
            Arg::with_name("hostname")
                .short("n")
                .long("hostname")
                .takes_value(true)
                .default_value("localhost")
                .empty_values(false)
                .help("Hostname to listen on for HTTP connections"),
        )
        .arg(
            Arg::with_name("port")
                .short("p")
                .long("port")
                .takes_value(true)
                .default_value("3000")
                .empty_values(false)
                .help("Port to use for HTTP connections"),
        )
        .arg(
            Arg::with_name("websocket-hostname")
                .long("websocket-hostname")
                .takes_value(true)
                .empty_values(false)
                .help(
                    "Hostname to connect to for WebSockets connections (Defaults to the HTTP hostname)",
                ),
        )
        .arg(
            Arg::with_name("websocket-port")
                .short("w")
                .long("websocket-port")
                .takes_value(true)
                .default_value("3001")
                .empty_values(false)
                .help("Port to use for WebSockets livereload connections"),
        )
        .arg_from_usage("-o, --open 'Opens the book server in a web browser'")
}

// Watch command implementation
pub fn execute(args: &ArgMatches, book_dir: &Path) -> Result<()> {
    let mut book = MDBook::load(&book_dir)?;
    super::inject_preprocessors(&mut book);

    let port = args.value_of("port").unwrap();
    let ws_port = args.value_of("websocket-port").unwrap();
    let hostname = args.value_of("hostname").unwrap();
    let public_address = args.value_of("websocket-address").unwrap_or(hostname);
    let open_browser = args.is_present("open");

    let address = format!("{}:{}", hostname, port);
    let ws_address = format!("{}:{}", hostname, ws_port);

    let livereload_url = format!("ws://{}:{}", public_address, ws_port);
    book.config
        .set("output.html.livereload-url", &livereload_url)?;

    if let Some(dest_dir) = args.value_of("dest-dir") {
        book.config.build.build_dir = dest_dir.into();
    }

    book.build()?;

    let mut chain = Chain::new(staticfile::Static::new(book.build_dir_for("html")));
    chain.link_after(ErrorRecover);
    let _iron = Iron::new(chain)
        .http(&*address)
        .chain_err(|| "Unable to launch the server")?;

    let ws_server =
        ws::WebSocket::new(|_| |_| Ok(())).chain_err(|| "Unable to start the websocket")?;

    let broadcaster = ws_server.broadcaster();

    std::thread::spawn(move || {
        ws_server.listen(&*ws_address).unwrap();
    });

    let serving_url = format!("http://{}", address);
    info!("Serving on: {}", serving_url);

    // #[cfg(feature = "watch")]
    watch::trigger_on_change(&mut book, move |path, book_dir| {
        info!("File changed: {:?}", path);
        info!("Building book...");

        // FIXME: This area is really ugly because we need to re-set livereload :(

        let result = MDBook::load(&book_dir)
            .and_then(|mut b| {
                super::inject_preprocessors(&mut b);
                b.config
                    .set("output.html.livereload-url", &livereload_url)?;
                Ok(b)
            })
            .and_then(|b| b.build());

        if let Err(_) = result {
            // error!("Unable to load the book");
            // utils::log_backtrace(&e);
            result.expect("Unable to load the book");
        } else {
            let _ = broadcaster.send("reload");
        }
    });

    Ok(())
}

impl AfterMiddleware for ErrorRecover {
    fn catch(&self, _: &mut Request, err: IronError) -> IronResult<Response> {
        match err.response.status {
            // each error will result in 404 response
            Some(_) => Ok(err.response.set(status::NotFound)),
            _ => Err(err),
        }
    }
}