Merge pull request #52 from MakingSense/DSL-625-quoted-profile-on-error-response

Added quoted profile on API's error responses.

Author: gabi-cg

src/MakingSense.AspNetCore.HypermediaApi/ExceptionHandling/ApiErrorHandlerMiddleware.cs

@@ -161,14 +161,15 @@ private static void WriteResponseHeaders(Problem problem, HttpRequest request, H
 			// otherwise return application/json + schema
 			var acceptsProblemType = request.Headers[HeaderNames.Accept].Contains(PROBLEM_MEDIATYPE);
 
+			var keepUnquoted = request.Query.ContainsKey("keep-unquoted-profile");
+
 			response.OnStarting((o) =>
 			{
 				response.ContentType = acceptsProblemType ? PROBLEM_MEDIATYPE
-					: response.ContentType + $"; profile={SchemaAttribute.Path}problem.json";
+					: response.ContentType + CreateProfileContentType(keepUnquoted);
 				return Task.FromResult(0);
 			}, null);
 
-
 			foreach (var pair in problem.GetCustomHeaders())
 			{
 				response.Headers[pair.Key] = pair.Value;
@@ -177,5 +178,12 @@ private static void WriteResponseHeaders(Problem problem, HttpRequest request, H
 			// Set problem status code
 			response.StatusCode = problem.status;
 		}
+
+		private static String CreateProfileContentType(bool keepUnquoted = false)
+		{
+			var profile = keepUnquoted ? SchemaAttribute.Path + "problem.json"
+				: $"\"{SchemaAttribute.Path?.Replace("\"", "\\\"")}" + "problem.json\"";
+			return $"; profile={profile}";
+		}
 	}
 }