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client.rs
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client.rs
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//#![deny(warnings)]
extern crate futures;
extern crate hyper;
extern crate tokio;
extern crate pretty_env_logger;
use std::env;
use std::io::{self, Write};
use futures::{FutureExt, StreamExt};
use futures::future::lazy;
use hyper::{Body, Client, Request};
fn main() {
pretty_env_logger::init();
let url = match env::args().nth(1) {
Some(url) => url,
None => {
println!("Usage: client <url>");
return;
}
};
let url = url.parse::<hyper::Uri>().unwrap();
if url.scheme_part().map(|s| s.as_ref()) != Some("http") {
println!("This example only works with 'http' URLs.");
return;
}
tokio::runtime::run2(lazy(move |_| {
let client = Client::default();
let mut req = Request::new(Body::empty());
*req.uri_mut() = url;
client.request(req).and_then(|res| {
println!("Response: {}", res.status());
println!("Headers: {:#?}", res.headers());
res.into_body().into_stream().for_each(|chunk| {
io::stdout().write_all(&chunk)
.map_err(|e| panic!("example expects stdout is open, error={}", e))
})
}).then(|result| {
if let Some(err) = result.err() {
eprintln!("Error {}", err);
} else {
println!("\n\nDone.");
}
Ok(())
})
}));
}