[英]rust non blocking openssl stream
嘗試創建非阻塞 ssl stream:
use openssl::ssl::{SslMethod, SslConnector};
use std::io::{Read, Write};
use std::net::TcpStream;
let connector = SslConnector::builder(SslMethod::tls()).unwrap().build();
let stream = TcpStream::connect("google.com:443").unwrap();
stream.set_nonblocking(true);
let mut stream = connector.connect("google.com", stream).unwrap();
但我得到了這個錯誤:
thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value:WouldBlock(MidHandshakeSslStream { stream: SslStream { stream: TcpStream { addr:V4(10.137.0.17:55628), peer: V4(172.217.21.78:443), fd: 3 }, ssl: Ssl { state: "SSLv3/TLSwrite client hello", verify_result: X509VerifyResult { code: 0, error: "ok" } } }, error: Error { code: ErrorCode(2), cause: Some(Io(Os { code: 11, kind: WouldBlock, message: "Resource temporarily unavailable" })) } })', src/libcore/result.rs:1051:5
如何創建非阻塞 ssl stream?
tokio 項目有tokio-openssl
crate。 您可能需要接受整個async/await
機制並使用該板條箱來執行非阻塞 openssl:
//# openssl = "0.10.25"
//# tokio = "0.2.0-alpha.6"
//# tokio-net = "0.2.0-alpha.6"
//# tokio-openssl = "0.4.0-alpha.6"
use openssl::ssl::{SslMethod, SslConnector};
use tokio::net::TcpStream;
use tokio::prelude::*;
use tokio_net::driver::Handle;
use tokio_openssl::connect;
use std::error::Error;
#[tokio::main]
async fn main() -> Result<(), Box<dyn Error>> {
let sslconf = SslConnector::builder(SslMethod::tls())?
.build()
.configure()?;
// The following 3 lines are equivalent to:
// let stream = TcpStream::connect("google.com:443").await?;
// It's just going to show that the socket is indeed nonblocking.
let stream = std::net::TcpStream::connect("google.com:443")?;
stream.set_nonblocking(true)?;
let stream = TcpStream::from_std(stream, &Handle::default())?;
let mut stream = connect(sslconf, "google.com", stream).await?;
stream.write_all(b"GET / HTTP/1.0\r\n\r\n").await?;
let mut res = vec![];
stream.read_to_end(&mut res).await?;
dbg!(String::from_utf8_lossy(&res));
Ok(())
}
當然,這也意味着現在你必須使用 beta/nightly 頻道。 它可能適用於您的項目,也可能不適用於您的項目。
如果需要非阻塞 stream 但您不想添加 tokio 作為依賴項,則可能的解決方案是:
use openssl::ssl::{SslMethod, SslConnector};
use std::io::{Read, Write};
use std::net::TcpStream;
let connector = SslConnector::builder(SslMethod::tls()).unwrap().build();
let stream = TcpStream::connect("google.com:443").unwrap();
let mut stream = connector.connect("google.com", stream).unwrap();
let inner_stream = stream.get_ref();
inner_stream.set_nonblocking(true);
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