tokio-rustls/examples/client/src/main.rs

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extern crate clap;
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extern crate rustls;
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extern crate tokio;
extern crate tokio_core;
extern crate webpki;
extern crate webpki_roots;
extern crate tokio_rustls;
#[cfg(unix)]
extern crate tokio_file_unix;
use std::sync::Arc;
use std::net::ToSocketAddrs;
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use std::io::{ BufReader, stdout, stdin };
use std::fs;
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use tokio::io;
use tokio::prelude::*;
use clap::{ App, Arg };
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use rustls::ClientConfig;
use tokio_rustls::ClientConfigExt;
fn app() -> App<'static, 'static> {
App::new("client")
.about("tokio-rustls client example")
.arg(Arg::with_name("host").value_name("HOST").required(true))
.arg(Arg::with_name("port").short("p").long("port").value_name("PORT").help("port, default `443`"))
.arg(Arg::with_name("domain").short("d").long("domain").value_name("DOMAIN").help("domain"))
.arg(Arg::with_name("cafile").short("c").long("cafile").value_name("FILE").help("CA certificate chain"))
}
fn main() {
let matches = app().get_matches();
let host = matches.value_of("host").unwrap();
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let port = matches.value_of("port")
.map(|port| port.parse().unwrap())
.unwrap_or(443);
let domain = matches.value_of("domain").unwrap_or(host);
let cafile = matches.value_of("cafile");
let text = format!("GET / HTTP/1.0\r\nHost: {}\r\n\r\n", domain);
let addr = (host, port)
.to_socket_addrs().unwrap()
.next().unwrap();
let mut config = ClientConfig::new();
if let Some(cafile) = cafile {
let mut pem = BufReader::new(fs::File::open(cafile).unwrap());
config.root_store.add_pem_file(&mut pem).unwrap();
} else {
config.root_store.add_server_trust_anchors(&webpki_roots::TLS_SERVER_ROOTS);
}
let arc_config = Arc::new(config);
let domain = webpki::DNSNameRef::try_from_ascii_str(domain).unwrap();
// Use async non-blocking I/O for stdin/stdout on Unixy platforms.
#[cfg(unix)]
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{
use tokio::io::AsyncRead;
use tokio_core::reactor::Core;
use tokio_core::net::TcpStream;
use tokio_file_unix::{ StdFile, File };
let mut core = Core::new().unwrap();
let handle = core.handle();
let socket = TcpStream::connect(&addr, &handle);
let stdin = stdin();
let stdin = File::new_nb(StdFile(stdin.lock())).unwrap()
.into_io(&handle).unwrap();
let stdout = stdout();
let stdout = File::new_nb(StdFile(stdout.lock())).unwrap()
.into_io(&handle).unwrap();
let resp = socket
.and_then(|stream| arc_config.connect_async(domain, stream))
.and_then(|stream| io::write_all(stream, text.as_bytes()))
.and_then(|(stream, _)| {
let (r, w) = stream.split();
io::copy(r, stdout)
.map(|_| ())
.select(io::copy(stdin, w).map(|_| ()))
.map_err(|(e, _)| e)
});
core.run(resp).unwrap();
}
// XXX: For now, just use blocking I/O for stdin/stdout on other platforms.
// The network I/O will still be asynchronous and non-blocking.
#[cfg(not(unix))]
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{
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use std::io::{ Read, Write };
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use tokio::net::TcpStream;
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let socket = TcpStream::connect(&addr);
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let mut input = Vec::new();
stdin().read_to_end(&mut input).unwrap();
let resp = socket
.and_then(|stream| arc_config.connect_async(domain, stream))
.and_then(|stream| io::write_all(stream, text.as_bytes()))
.and_then(|(stream, _)| io::write_all(stream, &input))
.and_then(|(stream, _)| io::read_to_end(stream, Vec::new()))
.and_then(|(_, output)| stdout().write_all(&output));
resp.wait().unwrap();
}
}