Java tutorial
/* Copyright (c) 2001 - 2013 OpenPlans - www.openplans.org. All rights reserved. * This code is licensed under the GPL 2.0 license, available at the root * application directory. */ package org.vfny.geoserver.wfs.servlets; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.PrintWriter; import java.net.URL; import java.net.URLDecoder; import javax.servlet.ServletConfig; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.codec.binary.Base64; /** * Simple tester for WFS post requests. Can be called two ways. If called with * no parameters, it displays the form, otherwise it displays the result page. * * @author Doug Cates: Moxi Media Inc. * @version 1.0 */ public class TestWfsPost extends HttpServlet { /** * Initializes the servlet. * * @param config DOCUMENT ME! * * @throws ServletException DOCUMENT ME! */ public void init(ServletConfig config) throws ServletException { super.init(config); } /** * Destroys the servlet. */ public void destroy() { } /** * Handles the HTTP <code>GET</code> method. * * @param request servlet request * @param response servlet response * * @throws ServletException DOCUMENT ME! * @throws IOException DOCUMENT ME! */ protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Handles the HTTP <code>POST</code> method. * * @param request servlet request * @param response servlet response * * @throws ServletException DOCUMENT ME! * @throws IOException DOCUMENT ME! */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Returns a short description of the servlet. * * @return DOCUMENT ME! */ public String getServletInfo() { return "Tests a WFS post request using a form entry."; } /** * Processes requests for both HTTP <code>GET</code> and <code>POST</code> * methods. * * @param request servlet request * @param response servlet response * * @throws ServletException DOCUMENT ME! * @throws IOException DOCUMENT ME! */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String requestString = request.getParameter("body"); String urlString = request.getParameter("url"); boolean doGet = (requestString == null) || requestString.trim().equals(""); if ((urlString == null)) { PrintWriter out = response.getWriter(); StringBuffer urlInfo = request.getRequestURL(); if (urlInfo.indexOf("?") != -1) { urlInfo.delete(urlInfo.indexOf("?"), urlInfo.length()); } String geoserverUrl = urlInfo.substring(0, urlInfo.indexOf("/", 8)) + request.getContextPath(); response.setContentType("text/html"); out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\">"); out.println("<html>"); out.println("<head>"); out.println("<title>TestWfsPost</title>"); out.println("</head>"); out.println("<script language=\"JavaScript\">"); out.println("function doNothing() {"); out.println("}"); out.println("function sendRequest() {"); out.println(" if (checkURL()==true) {"); out.print(" document.frm.action = \""); out.print(urlInfo.toString()); out.print("\";\n"); out.println(" document.frm.target = \"_blank\";"); out.println(" document.frm.submit();"); out.println(" }"); out.println("}"); out.println("function checkURL() {"); out.println(" if (document.frm.url.value==\"\") {"); out.println(" alert(\"Please give URL before you sumbit this form!\");"); out.println(" return false;"); out.println(" } else {"); out.println(" return true;"); out.println(" }"); out.println("}"); out.println("function clearRequest() {"); out.println("document.frm.body.value = \"\";"); out.println("}"); out.println("</script>"); out.println("<body>"); out.println("<form name=\"frm\" action=\"JavaScript:doNothing()\" method=\"POST\">"); out.println("<table align=\"center\" cellspacing=\"2\" cellpadding=\"2\" border=\"0\">"); out.println("<tr>"); out.println("<td><b>URL:</b></td>"); out.print("<td><input name=\"url\" value=\""); out.print(geoserverUrl); out.print("/wfs/GetFeature\" size=\"70\" MAXLENGTH=\"100\"/></td>\n"); out.println("</tr>"); out.println("<tr>"); out.println("<td><b>Request:</b></td>"); out.println("<td><textarea cols=\"60\" rows=\"24\" name=\"body\"></textarea></td>"); out.println("</tr>"); out.println("</table>"); out.println("<table align=\"center\">"); out.println("<tr>"); out.println("<td><input type=\"button\" value=\"Clear\" onclick=\"clearRequest()\"></td>"); out.println("<td><input type=\"button\" value=\"Submit\" onclick=\"sendRequest()\"></td>"); out.println("<td></td>"); out.println("</tr>"); out.println("</table>"); out.println("</form>"); out.println("</body>"); out.println("</html>"); out.close(); } else { response.setContentType("application/xml"); BufferedReader xmlIn = null; PrintWriter xmlOut = null; StringBuffer sbf = new StringBuffer(); String resp = null; try { URL u = new URL(urlString); java.net.HttpURLConnection acon = (java.net.HttpURLConnection) u.openConnection(); acon.setAllowUserInteraction(false); if (!doGet) { //System.out.println("set to post"); acon.setRequestMethod("POST"); acon.setRequestProperty("Content-Type", "application/xml"); } else { //System.out.println("set to get"); acon.setRequestMethod("GET"); } acon.setDoOutput(true); acon.setDoInput(true); acon.setUseCaches(false); //SISfixed - if there was authentication info in the request, // Pass it along the way to the target URL //DJB: applied patch in GEOS-335 String authHeader = request.getHeader("Authorization"); String username = request.getParameter("username"); if ((username != null) && !username.trim().equals("")) { String password = request.getParameter("password"); String up = username + ":" + password; byte[] encoded = Base64.encodeBase64(up.getBytes()); authHeader = "Basic " + new String(encoded); } if (authHeader != null) { acon.setRequestProperty("Authorization", authHeader); } if (!doGet) { xmlOut = new PrintWriter(new BufferedWriter(new OutputStreamWriter(acon.getOutputStream()))); xmlOut = new java.io.PrintWriter(acon.getOutputStream()); xmlOut.write(requestString); xmlOut.flush(); } // Above 400 they're all error codes, see: // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html if (acon.getResponseCode() >= 400) { PrintWriter out = response.getWriter(); out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); out.println("<servlet-exception>"); out.println("HTTP response: " + acon.getResponseCode() + "\n" + URLDecoder.decode(acon.getResponseMessage(), "UTF-8")); out.println("</servlet-exception>"); out.close(); } else { // xmlIn = new BufferedReader(new InputStreamReader( // acon.getInputStream())); // String line; // System.out.println("got encoding from acon: " // + acon.getContentType()); response.setContentType(acon.getContentType()); response.setHeader("Content-disposition", acon.getHeaderField("Content-disposition")); OutputStream output = response.getOutputStream(); int c; InputStream in = acon.getInputStream(); while ((c = in.read()) != -1) output.write(c); in.close(); output.close(); } //while ((line = xmlIn.readLine()) != null) { // out.print(line); //} } catch (Exception e) { PrintWriter out = response.getWriter(); out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); out.println("<servlet-exception>"); out.println(e.toString()); out.println("</servlet-exception>"); out.close(); } finally { try { if (xmlIn != null) { xmlIn.close(); } } catch (Exception e1) { PrintWriter out = response.getWriter(); out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); out.println("<servlet-exception>"); out.println(e1.toString()); out.println("</servlet-exception>"); out.close(); } try { if (xmlOut != null) { xmlOut.close(); } } catch (Exception e2) { PrintWriter out = response.getWriter(); out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); out.println("<servlet-exception>"); out.println(e2.toString()); out.println("</servlet-exception>"); out.close(); } } } } }