Adds PrefixPathRouteFilter

docs/src/main/asciidoc/spring-cloud-gateway.adoc

@@ -143,6 +143,9 @@ TODO: document AddResponseHeader Route Filter
 === Hystrix Route Filter
 TODO: document Hystrix Route Filter
 
+=== PrefixPath Route Filter
+TODO: document PrefixPath Route Filter
+
 === RedirectTo Route Filter
 TODO: document RedirectTo Route Filter
 

spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/config/GatewayAutoConfiguration.java

@@ -27,6 +27,7 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
 import org.springframework.cloud.gateway.actuate.GatewayEndpoint;
+import org.springframework.cloud.gateway.filter.route.PrefixPathRouteFilter;
 import org.springframework.cloud.gateway.model.RouteLocator;
 import org.springframework.cloud.gateway.model.RouteWriter;
 import org.springframework.cloud.gateway.filter.GlobalFilter;
@@ -236,6 +237,11 @@ public class GatewayAutoConfiguration {
 		}
 	}
 
+	@Bean(name = "PrefixPathRouteFilter")
+	public PrefixPathRouteFilter prefixPathRouteFilter() {
+		return new PrefixPathRouteFilter();
+	}
+
 	@Bean(name = "RedirectToRouteFilter")
 	public RedirectToRouteFilter redirectToRouteFilter() {
 		return new RedirectToRouteFilter();

spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/route/PrefixPathRouteFilter.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2013-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+package org.springframework.cloud.gateway.filter.route;
+
+import org.springframework.http.server.reactive.ServerHttpRequest;
+import org.springframework.web.server.WebFilter;
+
+/**
+ * @author Spencer Gibb
+ */
+public class PrefixPathRouteFilter implements RouteFilter {
+
+	@Override
+	@SuppressWarnings("unchecked")
+	public WebFilter apply(String... args) {
+		validate(1, args);
+		final String prefix = args[0];
+
+		return (exchange, chain) -> {
+			ServerHttpRequest req = exchange.getRequest();
+			String newPath = prefix + req.getURI().getPath();
+
+			ServerHttpRequest request = req.mutate()
+					.path(newPath)
+					.build();
+
+			return chain.filter(exchange.mutate().request(request).build());
+		};
+	}
+}

spring-cloud-gateway-core/src/test/java/org/springframework/cloud/gateway/test/BaseWebClientTests.java

@@ -159,27 +159,6 @@ public class BaseWebClientTests {
 			});
 		}
 
-		@Bean(name="PrefixPathRouteFilter")
-		public RouteFilter prefixPathRouteFilter() {
-			return new RouteFilter() {
-				@Override
-				public WebFilter apply(String... args) {
-					validate(1, args);
-					final String prefix = args[0];
-					return (exchange, chain) -> {
-						ServerHttpRequest req = exchange.getRequest();
-						String newPath = prefix + req.getURI().getPath();
-
-						ServerHttpRequest request = req.mutate()
-								.path(newPath)
-								.build();
-
-						return chain.filter(exchange.mutate().request(request).build());
-					};
-				}
-			};
-		}
-
 		@Bean
 		@Order(500)
 		public GlobalFilter modifyResponseFilter() {