Mercurial > dive4elements > river
annotate flys-client/src/main/java/de/intevation/flys/client/server/ProxyServlet.java @ 5291:66d9389c80cb
added tables for jetties in spatial schema
author | Tom Gottfried <tom@intevation.de> |
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date | Thu, 14 Mar 2013 12:16:58 +0100 |
parents | 92239b53823f |
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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 } |