Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/ProxyServlet.java @ 4604:488db475613d

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Add methods to hide and show the manage projects button of the header It should be possible to show the manage projects button only if the ProjectList is hidden. Therefore add methods to allow to show and hide the button.
author Björn Ricks <bjoern.ricks@intevation.de>
date Fri, 30 Nov 2012 10:00:39 +0100
parents 92239b53823f
children
rev   line source
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88feb3347aa5 Implement a ProxyServlet
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1 package de.intevation.flys.client.server;
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2
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3 import java.io.InputStream;
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4 import java.io.IOException;
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5 import java.io.OutputStream;
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6 import java.util.Enumeration;
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7
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8 import javax.servlet.ServletConfig;
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9 import javax.servlet.http.HttpServlet;
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10 import javax.servlet.http.HttpServletRequest;
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11 import javax.servlet.http.HttpServletResponse;
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12 import javax.servlet.http.HttpSession;
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13
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14 import org.apache.http.Header;
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15 import org.apache.http.HttpEntity;
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16 import org.apache.http.HttpResponse;
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17 import org.apache.http.StatusLine;
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18 import org.apache.http.client.HttpClient;
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19 import org.apache.http.client.methods.HttpGet;
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20 import org.apache.http.impl.client.DefaultHttpClient;
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21
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22 import org.apache.log4j.Logger;
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23
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24 import de.intevation.flys.client.server.auth.User;
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25
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26 /**
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27 * Implements a Proxy for HTTP Requests
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28 */
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29 public class ProxyServlet
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30 extends HttpServlet
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31 {
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32 private static Logger logger = Logger.getLogger(ProxyServlet.class);
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33 private String remoteurl;
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34
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35 @Override
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36 public void init(ServletConfig config) {
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37 this.remoteurl = config.getInitParameter("remoteurl");
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38 }
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39
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40 @Override
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41 public void doPost(HttpServletRequest req, HttpServletResponse resp) {
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42 }
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43
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44 @Override
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45 public void doGet(HttpServletRequest req, HttpServletResponse resp)
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46 throws IOException {
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47 HttpClient httpclient = new DefaultHttpClient();
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48
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49 String requesturi = req.getRequestURI();
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50 String query = req.getQueryString();
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51
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52 HttpGet httpget = new HttpGet(this.remoteurl + "?" + query);
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53
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54 boolean debug = logger.isDebugEnabled();
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55
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56 for (Enumeration e = req.getHeaderNames(); e.hasMoreElements();) {
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57 String name = (String)e.nextElement();
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58 for (Enumeration f = req.getHeaders(name); f.hasMoreElements();) {
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59 String value = (String)f.nextElement();
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60 if (debug) {
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61 logger.debug(
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62 "Adding request header " + name + " : " + value);
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63 }
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64 httpget.addHeader(name, value);
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65 }
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66 }
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67
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68 HttpResponse response = httpclient.execute(httpget);
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69
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70 StatusLine statusline = response.getStatusLine();
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71 if (debug) {
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72 logger.debug("Response statuscode " + statusline.getStatusCode());
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73 }
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74 resp.setStatus(statusline.getStatusCode());
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75
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76 Header[] headers = response.getAllHeaders();
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77 for(Header header : headers) {
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78 if (debug) {
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79 logger.debug(
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80 "Adding response header " + header.getName() +
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81 " : " + header.getValue());
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82 }
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83 resp.setHeader(header.getName(), header.getValue());
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84 }
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85
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86 HttpEntity entity = response.getEntity();
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87 if (entity != null) {
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88 InputStream instream = entity.getContent();
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89 byte [] buf = new byte[4096];
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90 try {
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91 OutputStream outstream = resp.getOutputStream();
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92 try {
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93 int read;
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94 while ((read = instream.read(buf)) >= 0) {
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95 outstream.write(buf, 0, read);
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96 }
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97 outstream.flush();
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98 }
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99 finally {
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100 outstream.close();
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101 }
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102 }
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103 finally {
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104 instream.close();
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105 }
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106 }
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107 }
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108
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109 private User getUser(HttpServletRequest req) {
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110 HttpSession session = req.getSession();
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111 return (User)session.getAttribute("user");
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112 }
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113 }
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