TLS handshake eof in async-std-echo.rs example when forcing WSS

[sedrik]

I don't get a valid WSS connection when trying the example. Not sure if I am doing something wrong.

Error: Io(Custom { kind: UnexpectedEof, error: "tls handshake eof" })

This is my Cargo.toml

[package]
name = "async_maker"
version = "0.1.0"
authors = ["Fredrik Park <sir.sedrik@gmail.com>"]
edition = "2018"

[dependencies]

async-std = "1.6.3"
futures = "0.3"
async-tungstenite = { version = "0.8", default-features = false, features = ["async-tls", "async-std-runtime"] }

For completeness I am including the code that I use (it's the example with the ws:// url removed).

use async_tungstenite::async_std::connect_async;
use async_tungstenite::tungstenite::Message;
use futures::prelude::*;
use async_std::task;

async fn run() -> Result<(), Box<dyn std::error::Error>> {
    let url = "wss://echo.websocket.org";

    let (mut ws_stream, _) = connect_async(url).await?;

    let text = "Hello, World!";

    println!("Sending: \"{}\"", text);
    ws_stream.send(Message::text(text)).await?;

    let msg = ws_stream
        .next()
        .await
        .ok_or_else(|| "didn't receive anything")??;

    println!("Received: {:?}", msg);

    Ok(())
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    task::block_on(run())
}

[sedrik]

cargo run --features="async-std-runtime, async-tls" --example async-std-echo also reproduces the issue for me.

[sdroege]

That's async-tls (and probably rustls in general?) being incompatible with the TLS on echo.websocket.org. If you use async-native-tls (using your system's TLS stack on Windows/macOS/etc and OpenSSL on Linux/BSD/etc) instead of async-tls it will work fine.