Add ReactiveHttpFilter

spring-web-reactive/src/main/java/org/springframework/http/server/FilterChainHttpHandler.java

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2002-2015 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.http.server;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import org.reactivestreams.Publisher;
+
+import org.springframework.util.Assert;
+
+/**
+ * An {@link ReactiveHttpHandler} decorator that delegates to a list of
+ * {@link ReactiveHttpFilter}s and the target {@link ReactiveHttpHandler}.
+ *
+ * @author Rossen Stoyanchev
+ */
+public class FilterChainHttpHandler implements ReactiveHttpHandler {
+
+	private final List<ReactiveHttpFilter> filters;
+
+	private final ReactiveHttpHandler targetHandler;
+
+
+	public FilterChainHttpHandler(ReactiveHttpHandler targetHandler, ReactiveHttpFilter... filters) {
+		Assert.notNull(targetHandler, "'targetHandler' is required.");
+		this.filters = (filters != null ? Arrays.asList(filters) : Collections.emptyList());
+		this.targetHandler = targetHandler;
+	}
+
+
+	@Override
+	public Publisher<Void> handle(ReactiveServerHttpRequest request, ReactiveServerHttpResponse response) {
+		return new DefaultHttpFilterChain().filter(request, response);
+	}
+
+
+	private class DefaultHttpFilterChain implements ReactiveHttpFilterChain {
+
+		private int index;
+
+		@Override
+		public Publisher<Void> filter(ReactiveServerHttpRequest request, ReactiveServerHttpResponse response) {
+			if (this.index < filters.size()) {
+				ReactiveHttpFilter filter = filters.get(this.index++);
+				return filter.filter(request, response, this);
+			}
+			else {
+				return targetHandler.handle(request, response);
+			}
+		}
+	}
+
+}

spring-web-reactive/src/main/java/org/springframework/http/server/ReactiveHttpFilter.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2002-2015 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.http.server;
+
+import org.reactivestreams.Publisher;
+
+/**
+ * @author Rossen Stoyanchev
+ */
+public interface ReactiveHttpFilter {
+
+
+	Publisher<Void> filter(ReactiveServerHttpRequest request, ReactiveServerHttpResponse response,
+			ReactiveHttpFilterChain chain);
+
+}

spring-web-reactive/src/main/java/org/springframework/http/server/ReactiveHttpFilterChain.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright 2002-2015 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.http.server;
+
+import org.reactivestreams.Publisher;
+
+import org.springframework.http.server.ReactiveServerHttpRequest;
+import org.springframework.http.server.ReactiveServerHttpResponse;
+
+
+/**
+ * @author Rossen Stoyanchev
+ */
+public interface ReactiveHttpFilterChain {
+
+	Publisher<Void> filter(ReactiveServerHttpRequest request, ReactiveServerHttpResponse response);
+
+}