Add project files.

src/common/Elsa.Api.Common/Extensions/HttpContextAccessorExtensions.cs

@@ -0,0 +1,25 @@
+using System.Net;
+using Microsoft.AspNetCore.Http;
+
+namespace Elsa.Extensions;
+
+/// <summary>
+/// Extension methods for <see cref="HttpRequest"/>.
+/// </summary>
+public static class HttpRequestExtensions
+{
+    /// <summary>
+    /// Returns a value indicating whether the specified request is a local request.
+    /// </summary>
+    /// <param name="request"></param>
+    /// <returns>True if the request is local, otherwise false.</returns>
+    public static bool IsLocal(this HttpRequest request)
+    {
+        var connection = request.HttpContext.Connection;
+        return connection.RemoteIpAddress != null
+            ? connection.LocalIpAddress != null
+                ? connection.RemoteIpAddress.Equals(connection.LocalIpAddress)
+                : IPAddress.IsLoopback(connection.RemoteIpAddress)
+            : connection.RemoteIpAddress == null && connection.LocalIpAddress == null;
+    }
+}