${aspnet-request-posted-body}: Use Async reading to prevent "Synchronous operations are disallowed"

examples/ASP.NET Core 3/ASP.NET Core 3 - VS2019/Controllers/HomeController.cs

@@ -31,6 +31,13 @@ public IActionResult Privacy()
             return View();
         }
 
+        [HttpPost]
+        public IActionResult AddItem(ItemModel model)
+        {
+            _logger.LogInformation("Added item {@Model}", model);
+            return View("Index");
+        }
+
         [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
         public IActionResult Error()
         {

examples/ASP.NET Core 3/ASP.NET Core 3 - VS2019/Models/ItemModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace ASP.NET_Core_3___VS2019.Models
+{
+    public class ItemModel
+    {
+        public string Name { get; set; }
+        public string Value { get; set; }
+
+    }
+}

examples/ASP.NET Core 3/ASP.NET Core 3 - VS2019/NLog.config

@@ -19,7 +19,7 @@
 
     <!-- another file log, only own logs. Uses some ASP.NET core renderers -->
     <target xsi:type="File" name="ownFile-web" fileName="c:\temp\nlog-AspNetCore3-own-${shortdate}.log"
-            layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|${callsite}" />
+            layout="${longdate}|${event-properties:item=EventId_Id:whenEmpty=0}|${uppercase:${level}}|${logger}|${message} ${exception:format=tostring}|url: ${aspnet-request-url}|action: ${aspnet-mvc-action}|${callsite}| body: ${aspnet-request-posted-body}" />
   </targets>
 
   <!-- rules to map from logger name to target -->

examples/ASP.NET Core 3/ASP.NET Core 3 - VS2019/Views/Home/Index.cshtml

@@ -5,4 +5,10 @@
 <div class="text-center">
     <h1 class="display-4">Welcome</h1>
     <p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
+
+    <form asp-controller="Home" asp-action="AddItem" method="post">
+        <input name="Name" value="myName"/>
+        <input name="Value" value="myValue"/>
+        <button type="submit">Add</button>
+    </form>
 </div>

src/Shared/LayoutRenderers/AspNetRequestPostedBody.cs

@@ -1,6 +1,7 @@
 using System;
 using System.IO;
 using System.Text;
+using System.Threading;
 using NLog.Common;
 using NLog.Config;
 using NLog.LayoutRenderers;
@@ -10,6 +11,7 @@
 using System.Web;
 using HttpRequest = System.Web.HttpRequestBase;
 #else
+using System.Threading.Tasks;
 using HttpRequest = Microsoft.AspNetCore.Http.HttpRequest;
 #endif
 
@@ -70,7 +72,12 @@ private static string BodyToString(Stream body)
                 // Note: don't dispose the StreamReader, it will close the stream and that's unwanted. You could pass that that
                 // to the StreamReader in some platforms, but then the dispose will be a NOOP, so for platform compat just don't dispose
                 var bodyReader = new StreamReader(body);
+
+#if ASP_NET_CORE
+                var content = bodyReader.ReadToEndAsync().ConfigureAwait(false).GetAwaiter().GetResult();
+#else
                 var content = bodyReader.ReadToEnd();
+#endif
                 return content;
             }
             finally