download_sysext: timeout after 20 seconds

Set the default timeout to 20 seconds, so HTTP client can abort after
that timeout.

Cargo.toml

@@ -16,7 +16,7 @@ protobuf = "3.2.0"
 reqwest = "0.11"
 sha2 = "0.10"
 tempfile = "3.8.1"
-tokio = { version = "1", features = ["macros", "net", "rt-multi-thread"] }
+tokio = { version = "1", features = ["macros", "net", "rt-multi-thread", "time"] }
 url = "2"
 uuid = "1.2"
 

src/bin/download_sysext.rs

@@ -7,6 +7,7 @@ use std::io;
 use std::io::BufReader;
 use std::path::{Path, PathBuf};
 use std::str::FromStr;
+use std::time::Duration;
 
 #[macro_use]
 extern crate log;
@@ -322,6 +323,8 @@ impl Args {
     }
 }
 
+const HTTP_CONN_TIMEOUT: u64 = 20;
+
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn Error>> {
     env_logger::init();
@@ -342,7 +345,7 @@ async fn main() -> Result<(), Box<dyn Error>> {
     fs::create_dir_all(&temp_dir)?;
 
     // The default policy of reqwest Client supports max 10 attempts on HTTP redirect.
-    let client = Client::builder().redirect(Policy::default()).build()?;
+    let client = Client::builder().connect_timeout(Duration::from_secs(HTTP_CONN_TIMEOUT)).redirect(Policy::default()).build()?;
 
     // If input_xml exists, simply read it.
     // If not, try to read from payload_url.