Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/DistanceInfoXML.java @ 3497:88feb3347aa5

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Implement a ProxyServlet Implement a ProxyServlet to be able to restrict the access to the mapserver too. All queries to the provided map services should go throught this new ProxyServlet. Currently the ProxyServlet can only handle HTTP GET requests. flys-client/trunk@5221 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Bjoern Ricks <bjoern.ricks@intevation.de>
date Thu, 16 Aug 2012 14:42:36 +0000
parents bc06a671ef60
children
rev   line source
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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
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7 import org.w3c.dom.Document;
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8 import org.w3c.dom.Element;
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9
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10 import org.apache.log4j.Logger;
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12 import javax.servlet.http.HttpServlet;
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13 import javax.servlet.http.HttpServletRequest;
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14 import javax.servlet.http.HttpServletResponse;
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15
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16 import de.intevation.artifacts.common.ArtifactNamespaceContext;
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17 import de.intevation.artifacts.common.utils.XMLUtils;
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18
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19 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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20 import de.intevation.artifacts.httpclient.http.HttpClient;
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21 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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22 import de.intevation.artifacts.httpclient.http.response.StreamResponseHandler;
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25 /**
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26 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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27 */
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28 public class DistanceInfoXML
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29 extends HttpServlet
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30 {
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31 private static final Logger logger = Logger.getLogger(DistanceInfoXML.class);
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34 public static final String ERROR_NO_DISTANCEINFO_FOUND =
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35 "error_no_distanceinfo_found";
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38 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
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39 logger.info("DistanceInfoXML.doGet");
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41 String url = getServletContext().getInitParameter("server-url");
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42
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43 String river = req.getParameter("river");
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44 String filter = req.getParameter("filter");
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46 Document doc = XMLUtils.newDocument();
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47
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48 XMLUtils.ElementCreator ec = new XMLUtils.ElementCreator(
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49 doc,
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50 ArtifactNamespaceContext.NAMESPACE_URI,
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51 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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52
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53 Element riverEl = ec.create("river");
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54 riverEl.setTextContent(river);
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55
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56 doc.appendChild(riverEl);
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57
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58 if (filter != null && filter.length() > 0) {
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59 Element typeEl = ec.create("filter");
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60 typeEl.setTextContent(filter);
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61
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62 riverEl.appendChild(typeEl);
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63 }
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64
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65 HttpClient client = new HttpClientImpl(url);
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66
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67 try {
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68 InputStream in = (InputStream) client.callService(
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69 url, "distanceinfo", doc, new StreamResponseHandler());
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70
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71 OutputStream out = resp.getOutputStream();
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72
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73 byte[] b = new byte[4096];
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74 int i;
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75 while ((i = in.read(b)) >= 0) {
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76 out.write(b, 0, i);
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77 }
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78
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79 out.flush();
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80 out.close();
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81 }
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82 catch (ConnectionException ce) {
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83 logger.error(ce, ce);
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84 }
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85 catch (IOException ioe) {
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86 logger.error(ioe, ioe);
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87 }
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88 }
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89 }
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90 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org