From 0784954971025fd820eedc1d656f10c0010063ab Mon Sep 17 00:00:00 2001
From: kinglionsoft <yangch_ts@qq.com>
Date: Tue, 16 Jan 2018 15:10:52 +0800
Subject: [PATCH] Can't set StatusCode after Response has started (#200)

---
 src/Ocelot/Errors/Middleware/ExceptionHandlerMiddleware.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Ocelot/Errors/Middleware/ExceptionHandlerMiddleware.cs b/src/Ocelot/Errors/Middleware/ExceptionHandlerMiddleware.cs
index 96f2ca45..abe9ca41 100644
--- a/src/Ocelot/Errors/Middleware/ExceptionHandlerMiddleware.cs
+++ b/src/Ocelot/Errors/Middleware/ExceptionHandlerMiddleware.cs
@@ -85,7 +85,10 @@ namespace Ocelot.Errors.Middleware
 
         private void SetInternalServerErrorOnResponse(HttpContext context)
         {
-            context.Response.StatusCode = 500;
+            if (!context.Response.HasStarted)
+            {
+                context.Response.StatusCode = 500;
+            }
         }
 
         private string CreateMessage(HttpContext context, Exception e)