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use std::net::ToSocketAddrs;
use std::net::{TcpStream, TcpListener};
use std::net::{Shutdown, SocketAddr};
use std::io::Result as IoResult;
use std::io::Error as IoError;
use std::io::{BufReader, ErrorKind};
use std::thread::spawn;
use std::marker::PhantomData;
use serialize::{Decodable, Encodable};
use bincode;
use bincode::rustc_serialize::{
EncodingResult,
EncodingError,
DecodingError
};
use bchannel::channel;
pub use bincode::SizeLimit;
pub use bchannel::Receiver;
pub type InTcpStream<T> = Receiver<T, DecodingError>;
pub struct OutTcpStream<T> {
tcp_stream: TcpStream,
write_limit: SizeLimit,
_phantom: PhantomData<T>
}
impl <'a, T> OutTcpStream<T>
where T: Encodable {
pub fn send(&mut self, m: &T) -> EncodingResult<()> {
bincode::rustc_serialize::encode_into(m, &mut self.tcp_stream, self.write_limit)
}
pub fn send_all<'b, I: Iterator<Item = &'b T>>(&mut self, mut i: I) ->
Result<(), (&'b T, I, EncodingError)> {
loop {
match i.next() {
None => return Ok(()),
Some(x) => {
match self.send(x) {
Ok(()) => {},
Err(e) => return Err((x, i, e))
}
}
}
}
}
pub fn close(self) {}
}
impl <T> Drop for OutTcpStream<T> {
fn drop(&mut self) {
self.tcp_stream.shutdown(Shutdown::Write).ok();
}
}
pub fn connect_tcp<'a, 'b, I, O, A>(addr: A, read_limit: SizeLimit, write_limit: SizeLimit) ->
IoResult<(Receiver<I, DecodingError>, OutTcpStream<O>)>
where I: Send + Decodable + 'static, O: Encodable, A: ToSocketAddrs {
Ok(try!(upgrade_tcp(try!(TcpStream::connect(&addr)), read_limit, write_limit)))
}
pub fn listen_tcp<A>(addr: A) -> IoResult<(Receiver<(TcpStream, SocketAddr), IoError>, TcpListener)>
where A: ToSocketAddrs {
let tcpl = try!(TcpListener::bind(&addr));
let (sx, rx) = channel();
let tcpl2 = try!(tcpl.try_clone());
spawn(move || {
loop {
if sx.is_closed() {
break;
}
match tcpl2.accept() {
Ok(stream) => {
if sx.send(stream).is_err() {
break;
}
}
Err(ref e) if e.kind() == ErrorKind::TimedOut => {
continue;
}
Err(e) => {
let _ = sx.error(e);
break;
}
}
}
});
Ok((rx, tcpl))
}
pub fn upgrade_tcp<'a, 'b, I, O>(
stream: TcpStream, read_limit: SizeLimit, write_limit: SizeLimit) ->
IoResult<(InTcpStream<I>, OutTcpStream<O>)>
where I: Send + Decodable + 'static, O: Encodable {
let s1 = stream;
let s2 = try!(s1.try_clone());
Ok((upgrade_reader(s1, read_limit),
upgrade_writer(s2, write_limit)))
}
fn upgrade_writer<'a, T>(stream: TcpStream, write_limit: SizeLimit) -> OutTcpStream<T>
where T: Encodable {
OutTcpStream {
tcp_stream: stream,
write_limit: write_limit,
_phantom: PhantomData
}
}
fn upgrade_reader<'a, T>(stream: TcpStream, read_limit: SizeLimit) -> InTcpStream<T>
where T: Send + Decodable + 'static {
let (in_snd, in_rec) = channel();
spawn(move || {
let mut buffer = BufReader::new(stream);
let read_limit = read_limit;
loop {
match bincode::rustc_serialize::decode_from(&mut buffer, read_limit) {
Ok(a) => {
if in_snd.send(a).is_err() {
break;
}
},
Err(e) => {
let _ = in_snd.error(e);
break;
}
}
}
let s1 = buffer.into_inner();
let _ = s1.shutdown(Shutdown::Read);
});
in_rec
}