201504.mbox/raw/%3c20150406171308.3F4ABAC0163@hades.apache.org%3e

+
+    /*
+     * Licensed to the Apache Software Foundation (ASF) under one
+     * or more contributor license agreements.  See the NOTICE file
+     * distributed with this work for additional information
+     * regarding copyright ownership.  The ASF licenses this file
+     * to you 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.apache.chemistry.opencmis.server.shared;
+
+    import java.io.IOException;
+    import java.io.OutputStreamWriter;
+    import java.io.PrintWriter;
+    import java.io.UnsupportedEncodingException;
+
+    import javax.servlet.ServletOutputStream;
+    import javax.servlet.http.HttpServletResponse;
+    import javax.servlet.http.HttpServletResponseWrapper;
+
+    public class NoBodyHttpServletResponseWrapper extends HttpServletResponseWrapper {
+
+        private final NoBodyOutputStream noBodyStream;
+        private PrintWriter writer;
+
+        public NoBodyHttpServletResponseWrapper(HttpServletResponse response) throws IOException {
+            super(response);
+            noBodyStream = new NoBodyOutputStream();
+        }
+
+        @Override
+        public ServletOutputStream getOutputStream() throws IOException {
+            return noBodyStream;
+        }
+
+        public PrintWriter getWriter() throws UnsupportedEncodingException {
+            if (writer == null) {
+                writer = new PrintWriter(new OutputStreamWriter(noBodyStream, getCharacterEncoding()));
+            }
+
+            return writer;
+        }
+
+        private static class NoBodyOutputStream extends ServletOutputStream {
+            @Override
+            public void write(int b) throws IOException {
+                // ignore
+            }
+
+            @Override
+            public void write(byte[] b) throws IOException {
+                // ignore
+            }
+
+            @Override
+            public void write(byte[] b, int off, int len) throws IOException {
+                // ignore
+            }
+        }
+    }
+