Fixed a error #6 “Incompatible with DeveloperExceptionPageMiddleware (ASP.NET 5)”

Author: Taritsyn

samples/WebMarkupMin.Sample.AspNet5.Mvc6/Controllers/HomeController.cs

@@ -89,6 +89,11 @@ public IActionResult Sitemap()
 			};
 		}
 
+		public IActionResult Error()
+		{
+			return View();
+		}
+
 		[NonAction]
 		private string GetAbsoluteUrl(string controllerName, string actionName)
 		{

samples/WebMarkupMin.Sample.AspNet5Core.Mvc6/Controllers/HomeController.cs

@@ -89,6 +89,11 @@ public IActionResult Sitemap()
 			};
 		}
 
+		public IActionResult Error()
+		{
+			return View();
+		}
+
 		[NonAction]
 		private string GetAbsoluteUrl(string controllerName, string actionName)
 		{

src/WebMarkupMin.AspNet5/WebMarkupMinMiddleware.cs

@@ -107,7 +107,17 @@ public async Task Invoke(HttpContext context)
 				Stream originalStream = response.Body;
 				response.Body = cacheStream;
 
-				await _next.Invoke(context);
+				try
+				{
+					await _next.Invoke(context);
+				}
+				catch (Exception)
+				{
+					response.Body = originalStream;
+					cacheStream.SetLength(0);
+
+					throw;
+				}
 
 				byte[] cacheBytes = cacheStream.ToArray();
 				int cacheSize = cacheBytes.Length;