update protobuf example

basics/hello-world/src/main.rs

@@ -17,7 +17,7 @@ async fn main() -> std::io::Result<()> {
             .service(web::resource("/index.html").to(|| async { "Hello world!" }))
             .service(web::resource("/").to(index))
     })
-    .bind("127.0.0.1:8080")?
+    .bind(("127.0.0.1", 8080))?
     .run()
     .await
 }

basics/middleware/src/main.rs

@@ -36,7 +36,7 @@ async fn main() -> std::io::Result<()> {
                 "Hello, middleware! Check the console where the server is run."
             }))
     })
-    .bind("127.0.0.1:8080")?
+    .bind(("127.0.0.1", 8080))?
     .run()
     .await
 }

basics/nested-routing/src/bin/main.rs

@@ -12,7 +12,7 @@ async fn main() -> std::io::Result<()> {
             .configure(config_app)
             .wrap(middleware::Logger::default())
     })
-    .bind("127.0.0.1:8080")?
+    .bind(("127.0.0.1", 8080))?
     .run()
     .await
 }

basics/shutdown-server/src/main.rs

@@ -23,7 +23,7 @@ async fn main() -> std::io::Result<()> {
     // create a channel
     let (tx, rx) = mpsc::channel::<()>();
 
-    let bind = "127.0.0.1:8080";
+    let bind = ("127.0.0.1", 8080);
 
     // start server as normal but don't .await after .run() yet
     let server = HttpServer::new(move || {

basics/state/src/main.rs

@@ -76,7 +76,7 @@ async fn main() -> io::Result<()> {
             // register simple handler
             .service(web::resource("/").to(index))
     })
-    .bind("127.0.0.1:8080")?
+    .bind(("127.0.0.1", 8080))?
     .run()
     .await
 }

basics/static_index/src/main.rs

@@ -18,7 +18,7 @@ async fn main() -> std::io::Result<()> {
             // path then the service for the static images would never be reached.
             .service(Files::new("/", "./static/root/").index_file("index.html"))
     })
-    .bind("127.0.0.1:8080")?
+    .bind(("127.0.0.1", 8080))?
     .run()
     .await
 }