[genhttp] Clean-up and simplify

src/Servers/GenHttpServer/Program.cs

@@ -1,44 +1,35 @@
-using GenHTTP.Api.Content;
 using GenHTTP.Api.Protocol;
+
 using GenHTTP.Engine.Internal;
+
 using GenHTTP.Modules.Functional;
-using GenHTTP.Modules.Layouting;
 using GenHTTP.Modules.Practices;
 
-var port = args.Length > 0 && int.TryParse(args[0], out var p) ? p : 8080;
+var port = (args.Length > 0 && ushort.TryParse(args[0], out var p)) ? p : (ushort)8080;
 
-var echoHandler = Inline.Create()
-    .Any(async (IRequest request) =>
-    {
-        await ValueTask.CompletedTask;
-        var sb = new System.Text.StringBuilder();
-        foreach (var h in request.Headers)
-            sb.AppendLine($"{h.Key}: {h.Value}");
-        return sb.ToString();
-    });
-
-var rootHandler = Inline.Create()
-    .Get(async (IRequest request) =>
-    {
-        await ValueTask.CompletedTask;
-        return "OK";
-    })
-    .Post(async (IRequest request) =>
+var app = Inline.Create()
+                .Get("/echo", (IRequest request) => Echo(request))
+                .Post((Stream body) => RequestContent(body))
+                .Any(() => StringContent());
+
+return await Host.Create()
+                 .Handler(app)
+                 .Defaults()
+                 .Port(port)
+                 .RunAsync();
+
+static string Echo(IRequest request)
+{
+    var headers = new System.Text.StringBuilder();
+
+    foreach (var h in request.Headers)
     {
-        if (request.Content is not null)
-        {
-            using var reader = new StreamReader(request.Content);
-            return await reader.ReadToEndAsync();
-        }
-        return "";
-    });
-
-var layout = Layout.Create()
-    .Add("echo", echoHandler)
-    .Add(rootHandler);
-
-await Host.Create()
-    .Handler(layout)
-    .Defaults()
-    .Port((ushort)port)
-    .RunAsync();
+        headers.AppendLine($"{h.Key}: {h.Value}");
+    }
+
+    return headers.ToString();
+}
+
+static string StringContent() => "OK";
+
+static Stream RequestContent(Stream body) => body;