Add reqrep-stdio example

examples/reqrep-stdio.rs

@@ -0,0 +1,100 @@
+// Copyright (c) 2015-2017 Contributors as noted in the AUTHORS file.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or http://www.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.
+//
+// This file was adapted from the nanomsg C example written by Tim Dysinger.
+// See http://tim.dysinger.net/posts/2013-09-16-getting-started-with-nanomsg.html
+// and https://github.com/dysinger/nanomsg-examples.
+
+extern crate log;
+extern crate env_logger;
+extern crate scaproust;
+
+use std::io::*;
+use std::time;
+use std::thread;
+
+use scaproust::*;
+
+const NODE0: &'static str = "node0";
+const NODE1: &'static str = "node1";
+
+#[cfg(not(windows))]
+fn create_session() -> Session {
+    SessionBuilder::new().
+        with("tcp", Tcp).
+        with("ipc", Ipc).
+        build().expect("Failed to create session !")
+}
+
+#[cfg(windows)]
+fn create_session() -> Session {
+    SessionBuilder::new().
+        with("tcp", Tcp).
+        build().expect("Failed to create session !")
+}
+
+fn sleep_ms(ms: u64) {
+    thread::sleep(time::Duration::from_millis(ms));
+}
+
+fn node0(url: &str) {
+    let mut session = create_session();
+    let mut socket = session.create_socket::<Rep>().expect("Failed to create socket !");
+
+    socket.bind(url).expect("Failed to bind socket !");
+
+    loop {
+        let buffer = socket.recv().expect("Recv request failed !");
+        let request = std::str::from_utf8(&buffer).expect("Failed to parse request msg !");
+
+        println!("NODE0: RECEIVED {:?}", request);
+        let response: String = request.chars().rev().collect();
+        println!("NODE0: SENDING: {:?}", response);
+        socket.send(response.into_bytes()).expect("Send reply failed!");
+   }
+}
+
+fn node1(url: &str) {
+    let mut session = create_session();
+    let mut socket = session.create_socket::<Req>().expect("Failed to create socket !");
+    socket.connect(url).expect("Failed to connect socket !");
+
+    let stdin = BufReader::new(stdin());
+
+    for line in stdin.lines() {
+        let line = line.expect("Failed to read line");
+        println!("NODE1: SENDING REQUEST {:?}", line);
+        socket.send(line.into_bytes()).expect("Send request failed !");
+        let buffer = socket.recv().expect("Recv reply failed !");
+        let reply = std::str::from_utf8(&buffer).expect("Failed to parse reply msg !");
+        println!("NODE1: RECEIVED RESPONSE {:?}", reply);
+    }
+
+    sleep_ms(50); // TODO remove this when linger is implemented ?
+}
+
+fn usage(program: &str) -> ! {
+    let _ = writeln!(stderr(), "Usage: {} {}|{} <URL> ...", program, NODE0, NODE1);
+    std::process::exit(1)
+}
+
+fn main() {
+    env_logger::init().unwrap();
+
+    let os_args: Vec<_> = std::env::args().collect();
+    let args: Vec<&str> = os_args.iter().map(|x| x.as_ref()).collect();
+    let program = args[0];
+
+    if args.len() < 2 {
+        usage(program);
+    }
+
+    match args[1] {
+        NODE0 if args.len() == 3 => node0(args[2]),
+        NODE1 if args.len() == 3 => node1(args[2]),
+        _ => usage(program)
+    }
+}