add necessary modules to new zero

zero/Extensions/HttpContextExtensions.cs

@@ -0,0 +1,44 @@
+using Microsoft.AspNetCore.Http;
+
+namespace zero.Extensions;
+
+public static class HttpContextExtensions
+{
+  /// <summary>
+  /// Whether the current request is an AJAX request
+  /// </summary>
+  public static bool IsAjaxRequest(this HttpContext context)
+  {
+    if (context?.Request?.Headers == null)
+    {
+      return false;
+    }
+
+    return context.Request.Headers["X-Requested-With"] == "XMLHttpRequest";
+  }
+
+
+  /// <summary>
+  /// Whether the current request only accepts application/json
+  /// </summary>
+  public static bool IsJsonRequest(this HttpContext context)
+  {
+    if (context?.Request?.Headers == null)
+    {
+      return false;
+    }
+
+    return context.Request.Headers["Accept"] == "application/json";
+  }
+
+
+  /// <summary>
+  /// Get IP Address of the client
+  /// </summary>
+  public static string GetClientIpAddress(this HttpContext context)
+  {
+    return context.Connection.RemoteIpAddress?.ToString();
+    //string ipAddress = context.GetServerVariable("HTTP_X_FORWARDED_FOR");
+    //return !ipAddress.IsNullOrEmpty() ? ipAddress.Split(',')[0] : context.GetServerVariable("REMOTE_ADDR");
+  }
+}