Mercurial > dive4elements > river

annotate gwt-client/src/main/java/org/dive4elements/river/client/server/ProxyServlet.java @ 5861:172338b1407f

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GWT client: Added copyright header.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:30:15 +0200
parents 5aa05a7a34b7
children ea9eef426962
rev   line source
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Sascha L. Teichmann <teichmann@intevation.de>
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.client.server;
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10
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11 import java.io.InputStream;
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12 import java.io.IOException;
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13 import java.io.OutputStream;
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14 import java.util.Enumeration;
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15
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16 import javax.servlet.ServletConfig;
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17 import javax.servlet.http.HttpServlet;
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18 import javax.servlet.http.HttpServletRequest;
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19 import javax.servlet.http.HttpServletResponse;
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20 import javax.servlet.http.HttpSession;
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21
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22 import org.apache.http.Header;
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23 import org.apache.http.HttpEntity;
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24 import org.apache.http.HttpResponse;
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25 import org.apache.http.StatusLine;
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26 import org.apache.http.client.HttpClient;
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27 import org.apache.http.client.methods.HttpGet;
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28 import org.apache.http.impl.client.DefaultHttpClient;
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29
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30 import org.apache.log4j.Logger;
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31
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32 import org.dive4elements.river.client.server.auth.User;
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33
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34 /**
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35 * Implements a Proxy for HTTP Requests
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36 */
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37 public class ProxyServlet
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38 extends HttpServlet
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39 {
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40 private static Logger logger = Logger.getLogger(ProxyServlet.class);
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41 private String remoteurl;
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42
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43 @Override
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44 public void init(ServletConfig config) {
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45 this.remoteurl = config.getInitParameter("remoteurl");
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46 }
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47
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48 @Override
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49 public void doPost(HttpServletRequest req, HttpServletResponse resp) {
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50 }
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51
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52 @Override
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53 public void doGet(HttpServletRequest req, HttpServletResponse resp)
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54 throws IOException {
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55 HttpClient httpclient = new DefaultHttpClient();
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56
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57 String requesturi = req.getRequestURI();
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58 String query = req.getQueryString();
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59
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60 HttpGet httpget = new HttpGet(this.remoteurl + "?" + query);
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61
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62 boolean debug = logger.isDebugEnabled();
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63
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64 for (Enumeration e = req.getHeaderNames(); e.hasMoreElements();) {
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65 String name = (String)e.nextElement();
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66 for (Enumeration f = req.getHeaders(name); f.hasMoreElements();) {
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67 String value = (String)f.nextElement();
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68 if (debug) {
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69 logger.debug(
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70 "Adding request header " + name + " : " + value);
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71 }
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72 httpget.addHeader(name, value);
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73 }
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74 }
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75
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76 HttpResponse response = httpclient.execute(httpget);
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77
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78 StatusLine statusline = response.getStatusLine();
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79 if (debug) {
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80 logger.debug("Response statuscode " + statusline.getStatusCode());
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81 }
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82 resp.setStatus(statusline.getStatusCode());
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83
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84 Header[] headers = response.getAllHeaders();
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85 for(Header header : headers) {
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86 if (debug) {
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87 logger.debug(
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88 "Adding response header " + header.getName() +
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89 " : " + header.getValue());
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90 }
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91 resp.setHeader(header.getName(), header.getValue());
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92 }
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93
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94 HttpEntity entity = response.getEntity();
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95 if (entity != null) {
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96 InputStream instream = entity.getContent();
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97 byte [] buf = new byte[4096];
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98 try {
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99 OutputStream outstream = resp.getOutputStream();
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100 try {
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101 int read;
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102 while ((read = instream.read(buf)) >= 0) {
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103 outstream.write(buf, 0, read);
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104 }
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105 outstream.flush();
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106 }
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107 finally {
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108 outstream.close();
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109 }
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110 }
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111 finally {
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112 instream.close();
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113 }
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114 }
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115 }
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116
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117 private User getUser(HttpServletRequest req) {
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118 HttpSession session = req.getSession();
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119 return (User)session.getAttribute("user");
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120 }
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121 }
http://dive4elements.wald.intevation.org