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

// use std::sync::Arc;
// use std::sync::atomic::{Ordering, AtomicUsize};
use std::time::Duration;
use std::net::SocketAddr;
use std::collections::HashSet;

use tokio_core::reactor::Core;
use tokio_core::net::{TcpListener};
use futures::{Stream, Future};
use futures::future::{FutureResult, ok};

use tk_http::{Status};
use tk_http::server::buffered::{Request, BufferedDispatcher};
use tk_http::server::{Encoder, EncoderDone, Config, Proto, Error};
use tk_listen::ListenExt;

use serde_json;
use ipc_channel::ipc::IpcSender;

use sandbox;
use sandbox::ipc::Message;
use errors::Result;


#[derive(Debug, Serialize, Deserialize)]
pub struct JsonReply {
    status: String,
}

impl JsonReply {
    fn new<I: Into<String>>(status: I) -> JsonReply {
        JsonReply {
            status: status.into(),
        }
    }
}

fn get_useragent(req: &Request) -> Option<&str> {
    use std::str;

    req.headers().into_iter()
        .filter(|&&(ref key, _)| key.to_lowercase() == "user-agent")
        .flat_map(|&(_, ref value)| str::from_utf8(&value).ok())
        .next()
}

pub struct Server {
    addr: SocketAddr,
    hooks: HashSet<String>,
    tx: IpcSender<Message>,
}

impl Server {
    pub fn new(addr: SocketAddr, hooks: HashSet<String>, tx: IpcSender<Message>) -> Server {
        Server {
            addr,
            hooks,
            tx,
        }
    }

    #[inline]
    fn extract_hook<'a>(&self, path: &'a str) -> Option<&'a str> {
        let path = path.split("/");
        let hook_id = path.skip(2).next(); // https://example.com/narnia/<hook_id>

        // if valid hook
        match hook_id {
            Some(hook) if self.hooks.contains(hook) => Some(hook),
            _ => None,
        }
    }

    #[inline]
    fn service<S>(&self, _counter: usize, r: Request, e: Encoder<S>)
        -> FutureResult<EncoderDone<S>, Error>
    {
        info!("req: {} {:?} {:?} {:?} {:?}",
            r.peer_addr(),
            r.host().unwrap_or("-"),
            r.method(),
            r.path(),
            get_useragent(&r).unwrap_or("-"),
        );

        let success = match self.extract_hook(r.path()) {
            Some(hook) => {
                info!("queueing hook: {:?}", hook);
                self.tx.send(Message::new(hook)).unwrap();
                true
            },
            _ => false,
        };

        if success {
            self.write_response(e, Status::Ok, &JsonReply::new("queued"))
        } else {
            self.write_response(e, Status::NotFound, &JsonReply::new("not found"))
        }
    }

    fn write_response<S>(&self, mut e: Encoder<S>, status: Status, json: &JsonReply)
        -> FutureResult<EncoderDone<S>, Error>
    {
        let body = serde_json::to_string(json).expect("encode failed");

        e.status(status);
        e.add_length(body.as_bytes().len() as u64).unwrap();
        // e.format_header("Date", time::now_utc().rfc822()).unwrap();
        /*
        e.add_header("Server",
            concat!("narnia/", env!("CARGO_PKG_VERSION"))
        ).unwrap();
        */
        if e.done_headers().unwrap() {
            e.write_body(body.as_bytes());
        }
        ok(e.done())
    }

    pub fn start(&self) -> Result<()> {
        let mut lp = Core::new().unwrap();
        let listener = TcpListener::bind(&self.addr, &lp.handle())?;
        let cfg = Config::new().done();
        let h1 = lp.handle();

        sandbox::activate_stage2().expect("failed to activate stage2");

        let done = listener.incoming()
            .sleep_on_error(Duration::from_millis(100), &lp.handle())
            .map(move |(socket, addr)| {
                Proto::new(socket, &cfg,
                    BufferedDispatcher::new(addr, &h1, move || {
                        move |r, e| {
                            let val = 123;
                            self.service(val, r, e)
                        }
                    }),
                    &h1)
                .map_err(|e| { println!("Connection error: {}", e); })
            })
            .listen(1000);

        lp.run(done).unwrap();

        Ok(())
    }
}