feat: better debug struct for H1Client

Better debug info for connection pooling.

Author: Fishrock123

examples/debug_h1_client.rs

@@ -0,0 +1,15 @@
+#![cfg(feature = "h1_client")]
+
+use http_client::{h1::H1Client, HttpClient};
+use http_types::{Method, Request};
+
+#[async_std::main]
+async fn main() {
+    let client = H1Client::new();
+
+    let req = Request::new(Method::Get, "http://example.org");
+
+    client.send(req).await.unwrap();
+
+    dbg!(client);
+}

src/h1/mod.rs

@@ -37,7 +37,40 @@ pub struct H1Client {
 
 impl Debug for H1Client {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.write_str("H1Client")
+        f.debug_struct("H1Client")
+            .field(
+                "http_pools",
+                &self
+                    .http_pools
+                    .iter()
+                    .map(|pool| {
+                        let status = pool.status();
+                        format!(
+                            "Connections: {}, Available: {}, Max: {}",
+                            status.size, status.available, status.max_size
+                        )
+                    })
+                    .collect::<Vec<String>>(),
+            )
+            .field(
+                "https_pools",
+                &self
+                    .http_pools
+                    .iter()
+                    .map(|pool| {
+                        let status = pool.status();
+                        format!(
+                            "Connections: {}, Available: {}, Max: {}",
+                            status.size, status.available, status.max_size
+                        )
+                    })
+                    .collect::<Vec<String>>(),
+            )
+            .field(
+                "max_concurrent_connections",
+                &self.max_concurrent_connections,
+            )
+            .finish()
     }
 }