docs: add tls to awc example

awc/examples/client.rs

@@ -1,25 +1,39 @@
-use std::error::Error as StdError;
+//! Demonstrates construction and usage of a TLS-capable HTTP client.
+
+extern crate tls_rustls_0_23 as rustls;
+
+use std::{error::Error as StdError, sync::Arc};
+
+use actix_tls::connect::rustls_0_23::webpki_roots_cert_store;
+use rustls::ClientConfig;
 
-/// If we want to make requests to addresses starting with `https`, we need to enable the rustls feature of awc
-/// `awc = { version = "3.5.0", features = ["rustls"] }`
 #[actix_rt::main]
 async fn main() -> Result<(), Box<dyn StdError>> {
     env_logger::init_from_env(env_logger::Env::new().default_filter_or("info"));
 
-    // construct request builder
-    let client = awc::Client::new();
+    let mut config = ClientConfig::builder()
+        .with_root_certificates(webpki_roots_cert_store())
+        .with_no_client_auth();
+
+    let protos = vec![b"h2".to_vec(), b"http/1.1".to_vec()];
+    config.alpn_protocols = protos;
+
+    // construct request builder with TLS support
+    let client = awc::Client::builder()
+        .connector(awc::Connector::new().rustls_0_23(Arc::new(config)))
+        .finish();
 
     // configure request
     let request = client
         .get("https://www.rust-lang.org/")
-        .append_header(("User-Agent", "Actix-web"));
+        .append_header(("User-Agent", "awc/3.0"));
 
-    println!("Request: {:?}", request);
+    println!("Request: {request:?}");
 
     let mut response = request.send().await?;
 
     // server response head
-    println!("Response: {:?}", response);
+    println!("Response: {response:?}");
 
     // read response body
     let body = response.body().await?;