From 1be9102aea7f0746a9b1219191c2abad70804f49 Mon Sep 17 00:00:00 2001
From: SteveSandersonMS <stevesa@microsoft.com>
Date: Fri, 9 Sep 2016 11:09:44 +0100
Subject: [PATCH] Prerendering server-side code can now issue redirections.
 Fixes #280

---
 .../Prerendering/PrerenderTagHelper.cs                   | 9 +++++++++
 .../Prerendering/RenderToStringResult.cs                 | 1 +
 2 files changed, 10 insertions(+)

diff --git a/src/Microsoft.AspNetCore.SpaServices/Prerendering/PrerenderTagHelper.cs b/src/Microsoft.AspNetCore.SpaServices/Prerendering/PrerenderTagHelper.cs
index de02c90..7bce95c 100644
--- a/src/Microsoft.AspNetCore.SpaServices/Prerendering/PrerenderTagHelper.cs
+++ b/src/Microsoft.AspNetCore.SpaServices/Prerendering/PrerenderTagHelper.cs
@@ -85,6 +85,15 @@ namespace Microsoft.AspNetCore.SpaServices.Prerendering
                 unencodedPathAndQuery,
                 CustomDataParameter,
                 TimeoutMillisecondsParameter);
+
+            if (!string.IsNullOrEmpty(result.RedirectUrl))
+            {
+                // It's a redirection
+                ViewContext.HttpContext.Response.Redirect(result.RedirectUrl);
+                return;
+            }
+
+            // It's some HTML to inject
             output.Content.SetHtmlContent(result.Html);
 
             // Also attach any specified globals to the 'window' object. This is useful for transferring
diff --git a/src/Microsoft.AspNetCore.SpaServices/Prerendering/RenderToStringResult.cs b/src/Microsoft.AspNetCore.SpaServices/Prerendering/RenderToStringResult.cs
index 1d5b482..cae8d63 100644
--- a/src/Microsoft.AspNetCore.SpaServices/Prerendering/RenderToStringResult.cs
+++ b/src/Microsoft.AspNetCore.SpaServices/Prerendering/RenderToStringResult.cs
@@ -6,5 +6,6 @@ namespace Microsoft.AspNetCore.SpaServices.Prerendering
     {
         public JObject Globals { get; set; }
         public string Html { get; set; }
+        public string RedirectUrl { get; set; }
     }
 }
\ No newline at end of file