201305.mbox/raw/%3c20130528072151.644182388BF1@eris.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.filter;
+
+    import javax.servlet.http.HttpServletRequest;
+    import javax.servlet.http.HttpServletRequestWrapper;
+
+    public class ProxyHttpServletRequestWrapper extends HttpServletRequestWrapper {
+
+        public static final String FORWARDED_HOST_HEADER = "X-Forwarded-Host";
+        public static final String FORWARDED_PROTO_HEADER = "X-Forwarded-Proto";
+        public static final String HTTPS_SCHEME = "https";
+        public static final String HTTP_SCHEME = "http";
+
+        private String scheme;
+        private String serverName;
+        private int serverPort;
+        private final String contextPath;
+        private final String servletPath;
+        private final String requestURI;
+
+        public ProxyHttpServletRequestWrapper(HttpServletRequest request, String basePath) {
+            super(request);
+
+            scheme = request.getHeader(FORWARDED_PROTO_HEADER);
+
+            if (!HTTP_SCHEME.equalsIgnoreCase(scheme) && !HTTPS_SCHEME.equalsIgnoreCase(scheme)) {
+                scheme = request.getScheme();
+            }
+
+            serverName = request.getServerName();
+            serverPort = request.getServerPort();
+
+            String host = request.getHeader(FORWARDED_HOST_HEADER);
+            if ((host != null) && (host.length() > 0)) {
+                int index = host.indexOf(':');
+                if (index < 0) {
+                    serverName = host;
+                    serverPort = getDefaultPort(scheme);
+                } else {
+                    serverName = host.substring(0, index);
+                    try {
+                        serverPort = Integer.parseInt(host.substring(index + 1));
+                    } catch (NumberFormatException e) {
+                        serverPort = getDefaultPort(scheme);
+                    }
+                }
+            }
+
+            servletPath = request.getServletPath();
+
+            if (basePath != null) {
+                final String path = request.getRequestURI().substring(
+                        request.getContextPath().length() + request.getServletPath().length());
+
+                contextPath = (basePath.startsWith("/") ? basePath : "/" + basePath);
+                requestURI = contextPath + servletPath + path;
+            } else {
+                contextPath = request.getContextPath();
+                requestURI = request.getRequestURI();
+            }
+        }
+
+        private int getDefaultPort(String scheme) {
+            if (HTTPS_SCHEME.equalsIgnoreCase(scheme)) {
+                return 443;
+            }
+
+            return 80;
+        }
+
+        @Override
+        public String getScheme() {
+            return scheme;
+        }
+
+        @Override
+        public String getServerName() {
+            return serverName;
+        }
+
+        @Override
+        public int getServerPort() {
+            return serverPort;
+        }
+
+        @Override
+        public String getContextPath() {
+            return contextPath;
+        }
+
+        @Override
+        public String getServletPath() {
+            return servletPath;
+        }
+
+        @Override
+        public String getRequestURI() {
+            return requestURI;
+        }
+
+        @Override
+        public StringBuffer getRequestURL() {
+            StringBuffer sb = new StringBuffer();
+            sb.append(scheme);
+            sb.append("://");
+            sb.append(serverName);
+            sb.append(":");
+            sb.append(serverPort);
+            sb.append(getRequestURI());
+
+            return sb;
+        }
+    }
+