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Support requets to domain names in example http_server #2513

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merged 2 commits into from
Apr 29, 2021
Merged

Support requets to domain names in example http_server #2513

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851c8b3
feat(example): support requests to domain names in example http_proxy
telotic Apr 24, 2021
1a982a9
refactor(example): simplify tunnel helper using tokio::io::copy_bidir…
telotic Apr 24, 2021
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39 changes: 12 additions & 27 deletions examples/http_proxy.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,6 @@
use std::convert::Infallible;
use std::net::SocketAddr;

use futures_util::future::try_join;

use hyper::service::{make_service_fn, service_fn};
use hyper::upgrade::Upgraded;
use hyper::{Body, Client, Method, Request, Response, Server};
Expand All @@ -18,8 +16,8 @@ type HttpClient = Client<hyper::client::HttpConnector>;
// 2. config http_proxy in command line
// $ export http_proxy=http://127.0.0.1:8100
// $ export https_proxy=http://127.0.0.1:8100
// 3. send requests (don't use a domain name)
// $ curl -i https://8.8.8.8
// 3. send requests
// $ curl -i https://www.some_domain.com/
#[tokio::main]
async fn main() {
let addr = SocketAddr::from(([127, 0, 0, 1], 8100));
Expand Down Expand Up @@ -88,38 +86,25 @@ async fn proxy(client: HttpClient, req: Request<Body>) -> Result<Response<Body>,
}
}

fn host_addr(uri: &http::Uri) -> Option<SocketAddr> {
uri.authority().and_then(|auth| auth.as_str().parse().ok())
fn host_addr(uri: &http::Uri) -> Option<String> {
uri.authority().and_then(|auth| Some(auth.to_string()))
}

// Create a TCP connection to host:port, build a tunnel between the connection and
// the upgraded connection
async fn tunnel(upgraded: Upgraded, addr: SocketAddr) -> std::io::Result<()> {
async fn tunnel(mut upgraded: Upgraded, addr: String) -> std::io::Result<()> {
// Connect to remote server
let mut server = TcpStream::connect(addr).await?;

// Proxying data
let amounts = {
let (mut server_rd, mut server_wr) = server.split();
let (mut client_rd, mut client_wr) = tokio::io::split(upgraded);

let client_to_server = tokio::io::copy(&mut client_rd, &mut server_wr);
let server_to_client = tokio::io::copy(&mut server_rd, &mut client_wr);

try_join(client_to_server, server_to_client).await
};
let (from_client, from_server) =
tokio::io::copy_bidirectional(&mut upgraded, &mut server).await?;

// Print message when done
match amounts {
Ok((from_client, from_server)) => {
println!(
"client wrote {} bytes and received {} bytes",
from_client, from_server
);
}
Err(e) => {
println!("tunnel error: {}", e);
}
};
println!(
"client wrote {} bytes and received {} bytes",
from_client, from_server
);

Ok(())
}