fix binding to unspecified addr on v4 and v6

src/main.rs

@@ -200,7 +200,7 @@ async fn main() -> std::io::Result<()> {
     });
     start_reaper(data.clone());
 
-    HttpServer::new(move || {
+    let server = HttpServer::new(move || {
         App::new()
             .app_data(data.clone())
             .wrap(if data.config.reverse_proxy {
@@ -213,25 +213,20 @@ async fn main() -> std::io::Result<()> {
             .service(check_upload_password)
             .service(upload_limits)
             .service(actix_files::Files::new("/", static_dir.clone()).index_file("index.html"))
-    })
+    });
-    .bind((
+
     if reverse_proxy {
-            std::net::Ipv4Addr::LOCALHOST
+        server
+            .bind((std::net::Ipv4Addr::LOCALHOST, port))?
+            .bind((std::net::Ipv6Addr::LOCALHOST, port))?
     } else {
-            std::net::Ipv4Addr::UNSPECIFIED
+        // Looks like this also picks up IPv4?
-        },
+        // Binding 0.0.0.0 and :: on the same port fails with an error.
-        port,
+        server.bind((std::net::Ipv6Addr::UNSPECIFIED, port))?
-    ))?
+    }
-    .bind((
-        if reverse_proxy {
-            std::net::Ipv6Addr::LOCALHOST
-        } else {
-            std::net::Ipv6Addr::UNSPECIFIED
-        },
-        port,
-    ))?
     .run()
     .await?;
+
     Ok(())
 }