| /* |
| * 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.unomi.web; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletRequestWrapper; |
| import javax.servlet.http.HttpServletResponse; |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| |
| /** |
| * Http wrapper that force the content type to be "application/json" |
| */ |
| class HttpServletRequestForwardWrapper extends HttpServletRequestWrapper { |
| |
| private static final Logger logger = LoggerFactory.getLogger(HttpServletRequestForwardWrapper.class.getName()); |
| private static final String JSON_CONTENT_TYPE = "application/json"; |
| |
| public HttpServletRequestForwardWrapper(HttpServletRequest request) { |
| super(request); |
| } |
| |
| /** |
| * Forward servlet request to jax-rs endpoints. For a given path, forward to /cxs + path. |
| * |
| * @param request initial request |
| * @param response initial response |
| */ |
| public static void forward(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
| try { |
| HttpServletRequest requestWrapper = new HttpServletRequestForwardWrapper(request); |
| requestWrapper.getServletContext() |
| .getContext("/cxs") |
| .getRequestDispatcher("/cxs" + request.getRequestURI()) |
| .forward(requestWrapper, response); |
| } catch (Throwable t) { // Here in order to return generic message instead of the whole stack trace in case of not caught exception |
| logger.error("HttpServletRequestForwardWrapper failed to forward the request", t); |
| response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Internal server error"); |
| } |
| } |
| |
| @Override |
| public String getHeader(String name) { |
| if ("Content-Type".equals(name) || "content-type".equals(name)) { |
| return JSON_CONTENT_TYPE; |
| } |
| return super.getHeader(name); |
| } |
| |
| @Override |
| public Enumeration<String> getHeaders(String name) { |
| if ("Content-Type".equals(name) || "content-type".equals(name)) { |
| return Collections.enumeration(Collections.singleton(JSON_CONTENT_TYPE)); |
| } |
| return super.getHeaders(name); |
| } |
| |
| @Override |
| public String getContentType() { |
| return JSON_CONTENT_TYPE; |
| } |
| |
| @Override |
| public String getCharacterEncoding() { |
| return "UTF-8"; |
| } |
| } |