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Merge pull request #9 from ddorgan/master

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Fix rust pubsub example
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Mike Goelzer 2019-03-12 12:22:15 -07:00 committed by GitHub
commit dcad16fe67
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4 changed files with 2316 additions and 125 deletions
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1
pubsub/rust/.gitignore vendored
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@ -1,2 +1 @@
Cargo.lock
target/

2232
pubsub/rust/Cargo.lock generated Normal file
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13
pubsub/rust/Cargo.toml
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@ -2,16 +2,11 @@
name = "floodsub-example"
version = "0.0.1"
authors = ["Rust Libp2p <libp2p@libp2p.io>"]
edition = "2018"
[dependencies]
bytes = "0.4"
futures = "0.1"
tokio-codec = "0.1"
tokio-io = "0.1"
tokio-current-thread = "0.1"
tokio-stdin = "0.1"
env_logger = "0.5.4"
rand = "0.4"
libp2p = { git = "https://github.com/libp2p/rust-libp2p" }
# To use local rust-libp2p source
#libp2p = { path = "../rust-libp2p" }
names = "0.11"
tokio = "0.1"
tokio-stdin-stdout = "0.1"

195
pubsub/rust/src/main.rs
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@ -17,139 +17,104 @@
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
extern crate bytes;
extern crate env_logger;
extern crate futures;
extern crate libp2p;
extern crate rand;
extern crate tokio_current_thread;
extern crate tokio_io;
extern crate tokio_stdin;
use futures::Stream;
use futures::future::Future;
use std::{env, mem};
use libp2p::core::{either::EitherOutput, upgrade};
use libp2p::core::{Multiaddr, Transport, PublicKey};
use libp2p::peerstore::PeerId;
use libp2p::tcp::TcpConfig;
use libp2p::websocket::WsConfig;
use futures::prelude::*;
use libp2p::{
NetworkBehaviour, Transport,
core::upgrade::{self, OutboundUpgradeExt},
secio,
mplex,
multiaddr,
tokio_codec::{FramedRead, LinesCodec}
};
use std::env;
fn main() {
env_logger::init();
// Address to listen on
let listen_addr:String = "/ip4/0.0.0.0/tcp/6002".to_owned();
// Create a random PeerId
let local_key = secio::SecioKeyPair::ed25519_generated().unwrap();
let local_pub_key = local_key.to_public_key();
// We start by creating a `TcpConfig` that indicates that we want TCP/IP.
let transport = TcpConfig::new()
// In addition to TCP/IP, we also want to support the Websockets protocol on top of TCP/IP.
// The parameter passed to `WsConfig::new()` must be an implementation of `Transport` to be
// used for the underlying multiaddress.
.or_transport(WsConfig::new(TcpConfig::new()))
// Set up a an encrypted DNS-enabled TCP Transport over the Mplex protocol
let transport = libp2p::CommonTransport::new()
.with_upgrade(secio::SecioConfig::new(local_key))
.and_then(move |out, _| {
let peer_id = out.remote_key.into_peer_id();
let upgrade = mplex::MplexConfig::new().map_outbound(move |muxer| (peer_id, muxer) );
upgrade::apply_outbound(out.stream, upgrade).map_err(|e| e.into_io_error())
});
// On top of TCP/IP, we will use either the plaintext protocol or the secio protocol,
// depending on which one the remote supports.
.with_upgrade({
let plain_text = upgrade::PlainTextConfig;
// Create a Floodsub topic
let floodsub_topic = libp2p::floodsub::TopicBuilder::new("libp2p-demo-chat").build();
let secio = {
let private_key = include_bytes!("test-rsa-private-key.pk8");
let public_key = include_bytes!("test-rsa-public-key.der").to_vec();
libp2p::secio::SecioConfig::new(
libp2p::secio::SecioKeyPair::rsa_from_pkcs8(private_key, public_key).unwrap()
)
};
// We create a custom network behaviour that combines floodsub and mDNS.
// In the future, we want to improve libp2p to make this easier to do.
#[derive(NetworkBehaviour)]
struct MyBehaviour<TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite> {
#[behaviour(handler = "on_floodsub")]
floodsub: libp2p::floodsub::Floodsub<TSubstream>,
mdns: libp2p::mdns::Mdns<TSubstream>,
}
upgrade::or(
upgrade::map(plain_text, |pt| EitherOutput::First(pt)),
upgrade::map(secio, |out: libp2p::secio::SecioOutput<_>| EitherOutput::Second(out.stream))
)
})
impl<TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite> MyBehaviour<TSubstream> {
// Called when `floodsub` produces an event.
fn on_floodsub<TTopology>(&mut self, message: <libp2p::floodsub::Floodsub<TSubstream> as libp2p::core::swarm::NetworkBehaviour<TTopology>>::OutEvent)
where TSubstream: libp2p::tokio_io::AsyncRead + libp2p::tokio_io::AsyncWrite
{
println!("{:?}: {}", &message.source,String::from_utf8_lossy(&message.data));
}
}
// On top of plaintext or secio, we will use the multiplex protocol.
.with_upgrade(libp2p::mplex::MplexConfig::new())
// The object returned by the call to `with_upgrade(MplexConfig::new())` can't be used as a
// `Transport` because the output of the upgrade is not a stream but a controller for
// muxing. We have to explicitly call `into_connection_reuse()` in order to turn this into
// a `Transport`.
.map(|val, _| ((), val))
.into_connection_reuse()
.map(|((), val), _| val);
// Create a Swarm to manage peers and events
let mut swarm = {
let mut behaviour = MyBehaviour {
floodsub: libp2p::floodsub::Floodsub::new(local_pub_key.clone().into_peer_id()),
mdns: libp2p::mdns::Mdns::new().expect("Failed to create mDNS service"),
};
// We now have a `transport` variable that can be used either to dial nodes or listen to
// incoming connections, and that will automatically apply secio and multiplex on top
// of any opened stream.
// We now prepare the protocol that we are going to negotiate with nodes that open a connection
// or substream to our server.
let my_id = {
let key = (0..2048).map(|_| rand::random::<u8>()).collect::<Vec<_>>();
PeerId::from_public_key(PublicKey::Rsa(key))
behaviour.floodsub.subscribe(floodsub_topic.clone());
libp2p::Swarm::new(transport, behaviour, libp2p::core::topology::MemoryTopology::empty(), local_pub_key)
};
let (floodsub_upgrade, floodsub_rx) = libp2p::floodsub::FloodSubUpgrade::new(my_id);
// We dial a bootstrap node for the nodes outside of the reach of mDNS.
libp2p::Swarm::dial_addr(&mut swarm, "/ip4/127.0.0.1/tcp/5555".parse().unwrap()).unwrap();
// Let's put this `transport` into a *swarm*. The swarm will handle all the incoming and
// outgoing connections for us.
let (swarm_controller, swarm_future) = libp2p::core::swarm(
transport.clone().with_upgrade(floodsub_upgrade.clone()),
|socket, _| {
println!("Successfully negotiated protocol");
socket
},
);
// Listen on all interfaces.
let port = if let Some(port) = env::args().nth(1) {
port.parse().expect("Failed to parse port number")
} else {
0u16
};
let address = swarm_controller
.listen_on(listen_addr.parse().expect("invalid multiaddr"))
.expect("unsupported multiaddr");
let address = libp2p::Swarm::listen_on(&mut swarm, multiaddr![Ip4([0, 0, 0, 0]), Tcp(port)]).unwrap();
println!("Now listening on {:?}", address);
let topic = libp2p::floodsub::TopicBuilder::new("libp2p-demo-chat").build();
// Read full lines from stdin
println!("Type your message to send to remote hosts:");
let stdin = tokio_stdin_stdout::stdin(0);
let mut framed_stdin = FramedRead::new(stdin, LinesCodec::new()).fuse();
let floodsub_ctl = libp2p::floodsub::FloodSubController::new(&floodsub_upgrade);
floodsub_ctl.subscribe(&topic);
let floodsub_rx = floodsub_rx.for_each(|msg| {
if let Ok(msg) = String::from_utf8(msg.data) {
println!("< {}", msg);
// Kick it off
tokio::run(futures::future::poll_fn(move || -> Result<_, ()> {
loop {
match framed_stdin.poll().expect("Error while polling stdin") {
Async::Ready(Some(line)) => {
let to_send = format!("{}", line);
println!("sending: {}", line);
swarm.floodsub.publish(&floodsub_topic, to_send.as_bytes())
},
Async::Ready(None) => break, // Stdin closed
Async::NotReady => break,
};
}
Ok(())
});
let m:String = "/ip4/127.0.0.1/tcp/5555".to_owned();
let target: Multiaddr = m.parse().unwrap();
println!("Dialing bootstrap peer {}", target);
swarm_controller
.dial(
target,
transport.clone().with_upgrade(floodsub_upgrade.clone()),
)
.unwrap();
let stdin = {
let mut buffer = Vec::new();
tokio_stdin::spawn_stdin_stream_unbounded().for_each(move |msg| {
if msg != b'\r' && msg != b'\n' {
buffer.push(msg);
return Ok(());
} else if buffer.is_empty() {
return Ok(());
loop {
match swarm.poll().expect("Error while polling swarm") {
Async::Ready(Some(_)) => {
},
Async::Ready(None) | Async::NotReady => break,
}
let msg = String::from_utf8(mem::replace(&mut buffer, Vec::new())).unwrap();
floodsub_ctl.publish(&topic, msg.into_bytes());
Ok(())
})
};
}
let final_fut = swarm_future
.for_each(|_| Ok(()))
.select(floodsub_rx)
.map(|_| ())
.map_err(|e| e.0)
.select(stdin.map_err(|_| unreachable!()))
.map(|_| ())
.map_err(|e| e.0);
tokio_current_thread::block_on_all(final_fut).unwrap();
Ok(Async::NotReady)
}));
}