Fix issue with forward:... routes

We have to ensure that the ZuulController is not mapped on a
forward otherwise we just go back through the same code
path and render nothing.

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/zuul/ZuulConfiguration.java

@@ -29,11 +29,11 @@ import org.springframework.cloud.netflix.zuul.filters.RouteLocator;
 import org.springframework.cloud.netflix.zuul.filters.SimpleRouteLocator;
 import org.springframework.cloud.netflix.zuul.filters.ZuulProperties;
 import org.springframework.cloud.netflix.zuul.filters.post.SendErrorFilter;
-import org.springframework.cloud.netflix.zuul.filters.post.SendForwardFilter;
 import org.springframework.cloud.netflix.zuul.filters.post.SendResponseFilter;
 import org.springframework.cloud.netflix.zuul.filters.pre.DebugFilter;
 import org.springframework.cloud.netflix.zuul.filters.pre.FormBodyWrapperFilter;
 import org.springframework.cloud.netflix.zuul.filters.pre.Servlet30WrapperFilter;
+import org.springframework.cloud.netflix.zuul.filters.route.SendForwardFilter;
 import org.springframework.cloud.netflix.zuul.web.ZuulController;
 import org.springframework.cloud.netflix.zuul.web.ZuulHandlerMapping;
 import org.springframework.context.ApplicationEvent;

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/zuul/filters/route/SendForwardFilter.java

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.springframework.cloud.netflix.zuul.filters.post;
+package org.springframework.cloud.netflix.zuul.filters.route;
 
 import javax.servlet.RequestDispatcher;
 
@@ -32,12 +32,12 @@ public class SendForwardFilter extends ZuulFilter {
 
 	@Override
 	public String filterType() {
-		return "post";
+		return "route";
 	}
 
 	@Override
 	public int filterOrder() {
-		return 2000;
+		return 500;
 	}
 
 	@Override
@@ -57,6 +57,7 @@ public class SendForwardFilter extends ZuulFilter {
 				ctx.set(SEND_FORWARD_FILTER_RAN, true);
 				if (!ctx.getResponse().isCommitted()) {
 					dispatcher.forward(ctx.getRequest(), ctx.getResponse());
+					ctx.getResponse().flushBuffer();
 				}
 			}
 		}

spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/zuul/web/ZuulHandlerMapping.java

@@ -25,6 +25,8 @@ import org.springframework.cloud.netflix.zuul.filters.RouteLocator;
 import org.springframework.util.PatternMatchUtils;
 import org.springframework.web.servlet.handler.AbstractUrlHandlerMapping;
 
+import com.netflix.zuul.context.RequestContext;
+
 /**
  * MVC HandlerMapping that maps incoming request paths to remote services.
  *
@@ -60,6 +62,10 @@ public class ZuulHandlerMapping extends AbstractUrlHandlerMapping {
 		if (PatternMatchUtils.simpleMatch(ignored, urlPath)) {
 			return null;
 		}
+		RequestContext ctx = RequestContext.getCurrentContext();
+		if (ctx.containsKey("forward.to")) {
+			return null;
+		}
 		return super.lookupHandler(urlPath, request);
 	}
 

spring-cloud-netflix-core/src/test/java/org/springframework/cloud/netflix/zuul/filters/post/SendForwardFilterTests.java

@@ -23,6 +23,7 @@ import javax.servlet.http.HttpServletRequest;
 
 import org.junit.After;
 import org.junit.Test;
+import org.springframework.cloud.netflix.zuul.filters.route.SendForwardFilter;
 import org.springframework.mock.web.MockHttpServletRequest;
 import org.springframework.mock.web.MockHttpServletResponse;