Borrowed value does not live long enough when adding rustls::Stream to a vector - ssl

Question

I want to create an Vec and add opened socket connection to it. When I run the code, I get borrowed value does not live long enough. I saw many Q&A on Stack Overflow for this error, but I couldn't figure it out how to solve it for rustls::Streams.
After creating array of rustls::Stream , I want to use another loop and send data with opened streams.
use rustls::{ClientConfig, ClientSession, Session, TLSError};
use std::env;
use std::fmt;
use std::sync::Arc;
use std::time::Instant;
use webpki;
use webpki_roots;
fn main() {
let mut config = rustls::ClientConfig::new();
config
.root_store
.add_server_trust_anchors(&webpki_roots::TLS_SERVER_ROOTS);
let arc = std::sync::Arc::new(config);
let mut connectors = Vec::new();
let now = Instant::now();
{
for n in 1..=2 {
let mut socket = std::net::TcpStream::connect("X.X.X.X:443").unwrap();
let dns_name = webpki::DNSNameRef::try_from_ascii_str("X.com").unwrap();
let mut client = rustls::ClientSession::new(&arc, dns_name);
let mut stream = rustls::Stream::new(&mut client, &mut socket); // Create stream
connectors.push(stream);
}
}
let elapsed = now.elapsed();
println!("Elapsed: {:?}", elapsed);
//AND LATER I'M GONNA ITERATE THROUGH THE VECTOR AND USE IT TO SEND DATA.
}
The error:
error[E0597]: `client` does not live long enough
--> src/main.rs:38:50
|
38 | let mut stream = rustls::Stream::new(&mut client, &mut socket); // Create stream
| ^^^^^^^^^^^ borrowed value does not live long enough
39 | let data_ref = &mut stream;
40 | connectors.push(data_ref);
| ---------- borrow later used here
41 | }
| - `client` dropped here while still borrowed
error[E0597]: `socket` does not live long enough
--> src/main.rs:38:63
|
38 | let mut stream = rustls::Stream::new(&mut client, &mut socket); // Create stream
| ^^^^^^^^^^^ borrowed value does not live long enough
39 | let data_ref = &mut stream;
40 | connectors.push(data_ref);
| ---------- borrow later used here
41 | }
| - `socket` dropped here while still borrowed
error[E0597]: `stream` does not live long enough
--> src/main.rs:39:28
|
39 | let data_ref = &mut stream;
| ^^^^^^^^^^^ borrowed value does not live long enough
40 | connectors.push(data_ref);
| ---------- borrow later used here
41 | }
| - `stream` dropped here while still borrowed

Answer 1

Use StreamOwned instead:
use rustls::{ClientConfig, ClientSession, StreamOwned}; // 0.17.0
use std::{net::TcpStream, sync::Arc, time::Instant};
use webpki::DNSNameRef; // 0.21.2
use webpki_roots; // 0.19.0
fn main() {
let mut config = ClientConfig::new();
config
.root_store
.add_server_trust_anchors(&webpki_roots::TLS_SERVER_ROOTS);
let arc = Arc::new(config);
let now = Instant::now();
let _connectors: Vec<_> = (0..2)
.map(|_| {
let socket = TcpStream::connect("X.X.X.X:443").unwrap();
let dns_name = DNSNameRef::try_from_ascii_str("X.com").unwrap();
let client = ClientSession::new(&arc, dns_name);
StreamOwned::new(client, socket)
})
.collect();
let elapsed = now.elapsed();
println!("Elapsed: {:?}", elapsed);
}