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// Copyright 2017 rust-ipfs-api Developers
//
// Licensed under the Apache License, Version 2.0, <LICENSE-APACHE or
// http://apache.org/licenses/LICENSE-2.0> or the MIT license <LICENSE-MIT or
// http://opensource.org/licenses/MIT>, at your option. This file may not be
// copied, modified, or distributed except according to those terms.
//
#[macro_use]
extern crate futures;
use futures::{future, FutureExt, StreamExt, TryStreamExt};
use ipfs_api::IpfsClient;
use std::time::Duration;
use tokio::time;
static TOPIC: &'static str = "test";
fn get_client() -> IpfsClient {
eprintln!("connecting to localhost:5001...");
IpfsClient::default()
}
// Creates an Ipfs client, and simultaneously publishes and reads from a pubsub
// topic.
//
#[cfg_attr(feature = "actix", actix_rt::main)]
#[cfg_attr(feature = "hyper", tokio::main)]
async fn main() {
eprintln!("note: ipfs must be run with the --enable-pubsub-experiment flag");
let publish_client = get_client();
// This block will execute a repeating function that sends
// a message to the "test" topic.
//
let mut publish = time::interval(Duration::from_secs(1))
.then(|_| future::ok(())) // Coerce the stream into a TryStream
.try_for_each(|_| {
eprintln!();
eprintln!("publishing message...");
publish_client.pubsub_pub(TOPIC, "Hello World!").boxed_local()
})
.boxed_local()
.fuse();
// This block will execute a future that suscribes to a topic,
// and reads any incoming messages.
//
let mut subscribe = {
let client = get_client();
client
.pubsub_sub(TOPIC, false)
.take(5)
.try_for_each(|msg| {
eprintln!();
eprintln!("received ({:?})", msg);
future::ok(())
})
.fuse()
};
eprintln!();
eprintln!("publish messages to ({})...", TOPIC);
eprintln!("waiting for messages from ({})...", TOPIC);
select! {
res = publish => if let Err(e) = res {
eprintln!("error publishing messages: {}", e);
},
res = subscribe => match res {
Ok(_) => eprintln!("done reading messages..."),
Err(e) => eprintln!("error reading messages: {}", e)
},
}
}
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