/** * Copyright (C) 2007 - 2014 52°North Initiative for Geospatial Open Source * Software GmbH * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. * * If the program is linked with libraries which are licensed under one of * the following licenses, the combination of the program with the linked * library is not considered a "derivative work" of the program: * * • Apache License, version 2.0 * • Apache Software License, version 1.0 * • GNU Lesser General Public License, version 3 * • Mozilla Public License, versions 1.0, 1.1 and 2.0 * • Common Development and Distribution License (CDDL), version 1.0 * * Therefore the distribution of the program linked with libraries licensed * under the aforementioned licenses, is permitted by the copyright holders * if the distribution is compliant with both the GNU General Public * License version 2 and the aforementioned licenses. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General * Public License for more details. */ package org.n52.wps.transactional.service; import java.io.BufferedReader; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.PrintWriter; import java.io.StringWriter; import java.net.URLDecoder; import java.util.Date; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.OutputKeys; import javax.xml.transform.Transformer; import javax.xml.transform.TransformerException; import javax.xml.transform.TransformerFactory; import javax.xml.transform.TransformerFactoryConfigurationError; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.n52.wps.server.ExceptionReport; import org.n52.wps.transactional.handler.TransactionalExceptionHandler; import org.n52.wps.transactional.handler.TransactionalRequestHandler; import org.n52.wps.transactional.request.DeployProcessRequest; import org.n52.wps.transactional.request.ITransactionalRequest; import org.n52.wps.transactional.request.UndeployProcessRequest; import org.n52.wps.transactional.response.TransactionalResponse; import org.w3c.dom.Document; import org.w3c.dom.Node; import org.xml.sax.SAXException; public class TransactionalWebProcessingService extends HttpServlet{ private static Logger LOGGER = LoggerFactory.getLogger(TransactionalWebProcessingService.class); protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { LOGGER.info("Inbound HTTP-POST DeployProcess Request. " + new Date()); TransactionalResponse response = null; try { InputStream is = req.getInputStream(); if (req.getParameterMap().containsKey("request")){ is = new ByteArrayInputStream(req.getParameter("request").getBytes("UTF-8")); } // WORKAROUND cut the parameter name "request" of the stream BufferedReader br=new BufferedReader(new InputStreamReader(is,"UTF-8")); StringWriter sw=new StringWriter(); int k; while((k=br.read())!=-1){ sw.write(k); } LOGGER.debug(sw.toString()); String s; String reqContentType = req.getContentType(); if (sw.toString().startsWith("request=")){ if(reqContentType.equalsIgnoreCase("text/plain")) { s = sw.toString().substring(8); } else { s = URLDecoder.decode(sw.toString().substring(8), "UTF-8"); } LOGGER.debug(s); } else{ s = sw.toString(); } is = new ByteArrayInputStream(s.getBytes("UTF-8")); //System.setProperty("javax.xml.parsers.DocumentBuilderFactory", "com.sun.org.apache.xerces.jaxp.DocumentBuilderFactoryImpl"); DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance(); boolean changeMe = false; if(changeMe){ documentBuilderFactory.setNamespaceAware(true);//this prevents "xmlns=""" documentBuilderFactory.setIgnoringElementContentWhitespace(true); } DocumentBuilder documentBuilder= documentBuilderFactory.newDocumentBuilder(); Document document = documentBuilder.parse(is); String requestType = document.getFirstChild().getNodeName(); ITransactionalRequest request = null; if (requestType == null) { throw new ExceptionReport("Request not valid", ExceptionReport.OPERATION_NOT_SUPPORTED); } else if (requestType.equals("DeployProcess")) { request = new DeployProcessRequest(document); } else if (requestType.equals("UnDeployProcess")) { request = new UndeployProcessRequest(document); } else { throw new ExceptionReport("Request type unknown (" + requestType + ") Must be DeployProcess or UnDeployProcess", ExceptionReport.OPERATION_NOT_SUPPORTED); } LOGGER.info("Request type: " + requestType); TransactionalRequestHandler handler = new TransactionalRequestHandler(); response = handler.handle(request); if (response == null) { throw new ExceptionReport("bug! An error has occurred while " + "processing the request: " + requestType, ExceptionReport.NO_APPLICABLE_CODE); } else { String rootTag = (request instanceof DeployProcessRequest) ? "DeployProcessResponse" : "UnDeployProcessResponse"; PrintWriter writer = res.getWriter(); writer.write("<" + rootTag + ">"); writer.write("<Result success=\"true\">"); writer.write(response.getMessage()); writer.write("</Result>"); writer.write("</" + rootTag + ">"); writer.flush(); writer.close(); LOGGER.info("Request handled successfully: " + requestType); } } catch (ParserConfigurationException e) { TransactionalExceptionHandler.handleException(res.getWriter(), new ExceptionReport("An error has occurred while " + "building the XML parser", ExceptionReport.NO_APPLICABLE_CODE)); } catch (SAXException e) { TransactionalExceptionHandler.handleException(res.getWriter(), new ExceptionReport("An error has occurred while " + "parsing the XML request", ExceptionReport.NO_APPLICABLE_CODE)); } catch (ExceptionReport exception) { TransactionalExceptionHandler.handleException(res.getWriter(), exception); } catch (Throwable t) { TransactionalExceptionHandler.handleException(res.getWriter(), new ExceptionReport("Unexpected error", ExceptionReport.NO_APPLICABLE_CODE)); } } private String nodeToString(Node node) throws TransformerFactoryConfigurationError, TransformerException { StringWriter stringWriter = new StringWriter(); Transformer transformer = TransformerFactory.newInstance().newTransformer(); transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); transformer.transform(new DOMSource(node), new StreamResult(stringWriter)); return stringWriter.toString(); } }