Expose the original status code in StatusCodeReExecuteFeature

src/Middleware/Diagnostics.Abstractions/src/IStatusCodeReExecuteFeature.cs

@@ -28,6 +28,11 @@ public interface IStatusCodeReExecuteFeature
     /// </summary>
     string? OriginalQueryString { get; set; }
 
+    /// <summary>
+    /// The <see cref="HttpResponse.StatusCode"/> of the original response.
+    /// </summary>
+    int OriginalStatusCode => throw new NotImplementedException();
+
     /// <summary>
     /// Gets the selected <see cref="Http.Endpoint"/> for the original request.
     /// </summary>

src/Middleware/Diagnostics.Abstractions/src/PublicAPI.Unshipped.txt

@@ -1 +1,2 @@
 #nullable enable
+Microsoft.AspNetCore.Diagnostics.IStatusCodeReExecuteFeature.OriginalStatusCode.get -> int

src/Middleware/Diagnostics/src/PublicAPI.Unshipped.txt

@@ -1 +1,2 @@
 #nullable enable
+Microsoft.AspNetCore.Diagnostics.StatusCodeReExecuteFeature.OriginalStatusCode.get -> int

src/Middleware/Diagnostics/src/StatusCodePage/StatusCodePagesExtensions.cs

@@ -164,10 +164,12 @@ private static Func<StatusCodeContext, Task> CreateHandler(string pathFormat, st
     {
         var handler = async (StatusCodeContext context) =>
         {
+            var originalStatusCode = context.HttpContext.Response.StatusCode;
+
             var newPath = new PathString(
-                string.Format(CultureInfo.InvariantCulture, pathFormat, context.HttpContext.Response.StatusCode));
+                string.Format(CultureInfo.InvariantCulture, pathFormat, originalStatusCode));
             var formatedQueryString = queryFormat == null ? null :
-                string.Format(CultureInfo.InvariantCulture, queryFormat, context.HttpContext.Response.StatusCode);
+                string.Format(CultureInfo.InvariantCulture, queryFormat, originalStatusCode);
             var newQueryString = queryFormat == null ? QueryString.Empty : new QueryString(formatedQueryString);
 
             var originalPath = context.HttpContext.Request.Path;
@@ -181,6 +183,7 @@ private static Func<StatusCodeContext, Task> CreateHandler(string pathFormat, st
                 OriginalPathBase = context.HttpContext.Request.PathBase.Value!,
                 OriginalPath = originalPath.Value!,
                 OriginalQueryString = originalQueryString.HasValue ? originalQueryString.Value : null,
+                OriginalStatusCode = originalStatusCode,
                 Endpoint = context.HttpContext.GetEndpoint(),
                 RouteValues = routeValuesFeature?.RouteValues
             });

src/Middleware/Diagnostics/src/StatusCodePage/StatusCodeReExecuteFeature.cs

@@ -18,6 +18,9 @@ public class StatusCodeReExecuteFeature : IStatusCodeReExecuteFeature
     /// <inheritdoc/>
     public string? OriginalQueryString { get; set; }
 
+    /// <inheritdoc/>
+    public int OriginalStatusCode { get; internal set; }
+
     /// <inheritdoc/>
     public Endpoint? Endpoint { get; set; }