add net in support and download fn

crates/support/Cargo.toml

@@ -9,4 +9,5 @@ edition = "2021"
 thiserror = "1.0.40"
 async-trait = "0.1.68"
 futures = "0.3.28"
+reqwest = "0.11.18"
 

crates/support/src/lib.rs

 pub mod fs;
+pub mod net;

crates/support/src/net.rs

+use std::io::Cursor;
+type Result<T> = std::result::Result<T, Box<dyn std::error::Error + Send + Sync>>;
+
+pub async fn download_file(url: String, dest: String) -> Result<()> {
+    let response = reqwest::get(url).await?;
+    let mut file = std::fs::File::create(dest)?;
+    let mut content = Cursor::new(response.bytes().await?);
+    std::io::copy(&mut content, &mut file)?;
+    Ok(())
+}