Add functionality to call a PostTransform method after the Webhook request has been transformed

src/WireMock.Net/Http/WebhookSender.cs

@@ -46,7 +46,7 @@ IResponseMessage originalResponseMessage
 
         IBodyData? bodyData;
         IDictionary<string, WireMockList<string>>? headers;
-        string webhookRequestUrl;
+        string requestUrl;
         if (webhookRequest.UseTransformer == true)
         {
             ITransformer transformer;
@@ -69,18 +69,20 @@ IResponseMessage originalResponseMessage
 
             bodyData = transformer.TransformBody(mapping, originalRequestMessage, originalResponseMessage, webhookRequest.BodyData, webhookRequest.TransformerReplaceNodeOptions);
             headers = transformer.TransformHeaders(mapping, originalRequestMessage, originalResponseMessage, webhookRequest.Headers);
-            webhookRequestUrl = transformer.TransformString(mapping, originalRequestMessage, originalResponseMessage, webhookRequest.Url);
+            requestUrl = transformer.TransformString(mapping, originalRequestMessage, originalResponseMessage, webhookRequest.Url);
+
+            mapping.Settings.WebhookSettings?.PostTransform(mapping, requestUrl, bodyData, headers);
         }
         else
         {
             bodyData = webhookRequest.BodyData;
             headers = webhookRequest.Headers;
-            webhookRequestUrl = webhookRequest.Url;
+            requestUrl = webhookRequest.Url;
         }
 
         // Create RequestMessage
         var requestMessage = new RequestMessage(
-            new UrlDetails(webhookRequestUrl),
+            new UrlDetails(requestUrl),
             webhookRequest.Method,
             ClientIp,
             bodyData,
@@ -91,7 +93,7 @@ IResponseMessage originalResponseMessage
         };
 
         // Create HttpRequestMessage
-        var httpRequestMessage = HttpRequestMessageHelper.Create(requestMessage, webhookRequestUrl);
+        var httpRequestMessage = HttpRequestMessageHelper.Create(requestMessage, requestUrl);
 
         // Delay (if required)
         if (TryGetDelay(webhookRequest, out var delay))

src/WireMock.Net/Settings/WebhookSettings.cs

@@ -1,10 +1,24 @@
 // Copyright © WireMock.Net
 
+using System.Collections.Generic;
+using WireMock.Types;
+using WireMock.Util;
+
 namespace WireMock.Settings;
 
 /// <summary>
 /// WebhookSettings
 /// </summary>
 public class WebhookSettings : HttpClientSettings
 {
+    /// <summary>
+    /// Executes an action after the transformation of the request body.
+    /// </summary>
+    /// <param name="mapping">The mapping used for the request.</param>
+    /// <param name="requestUrl">The request Url.</param>
+    /// <param name="bodyData">The body data of the request. [Optional]</param>
+    /// <param name="headers">The headers of the request. [Optional]</param>
+    public virtual void PostTransform(IMapping mapping, string requestUrl, IBodyData? bodyData = null, IDictionary<string, WireMockList<string>>? headers = null)
+    {
+    }
 }