Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/FileUploadServiceImpl.java @ 2494:88b51e6e0334

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Issue 657. Added UI and service for shapefile upload. flys-client/trunk@4294 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Raimund Renkert <raimund.renkert@intevation.de>
date Wed, 25 Apr 2012 07:58:58 +0000
parents
children a6c6f305546c
rev   line source
2494
88b51e6e0334 Issue 657.
Raimund Renkert <raimund.renkert@intevation.de>
parents:
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1 package de.intevation.flys.client.server;
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Raimund Renkert <raimund.renkert@intevation.de>
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2
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Raimund Renkert <raimund.renkert@intevation.de>
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3 import java.io.InputStream;
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Raimund Renkert <raimund.renkert@intevation.de>
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4 import java.io.ByteArrayOutputStream;
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5
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6 import org.apache.log4j.Logger;
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Raimund Renkert <raimund.renkert@intevation.de>
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7 import org.apache.commons.codec.binary.Base64;
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Raimund Renkert <raimund.renkert@intevation.de>
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8 import org.apache.commons.fileupload.FileItemIterator;
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Raimund Renkert <raimund.renkert@intevation.de>
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9 import org.apache.commons.fileupload.FileItemStream;
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Raimund Renkert <raimund.renkert@intevation.de>
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10 import org.apache.commons.fileupload.servlet.ServletFileUpload;
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Raimund Renkert <raimund.renkert@intevation.de>
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11 import org.apache.commons.fileupload.FileUploadException;
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Raimund Renkert <raimund.renkert@intevation.de>
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12
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Raimund Renkert <raimund.renkert@intevation.de>
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13 import org.w3c.dom.Document;
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Raimund Renkert <raimund.renkert@intevation.de>
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14 import org.w3c.dom.Element;
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Raimund Renkert <raimund.renkert@intevation.de>
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15
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Raimund Renkert <raimund.renkert@intevation.de>
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16 import javax.servlet.http.HttpServlet;
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Raimund Renkert <raimund.renkert@intevation.de>
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17 import javax.servlet.http.HttpServletRequest;
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Raimund Renkert <raimund.renkert@intevation.de>
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18 import javax.servlet.http.HttpServletResponse;
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Raimund Renkert <raimund.renkert@intevation.de>
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19
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Raimund Renkert <raimund.renkert@intevation.de>
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20 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
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Raimund Renkert <raimund.renkert@intevation.de>
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21
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Raimund Renkert <raimund.renkert@intevation.de>
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22 import de.intevation.artifacts.common.utils.XMLUtils;
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Raimund Renkert <raimund.renkert@intevation.de>
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23 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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Raimund Renkert <raimund.renkert@intevation.de>
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24
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Raimund Renkert <raimund.renkert@intevation.de>
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25 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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Raimund Renkert <raimund.renkert@intevation.de>
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26 import de.intevation.artifacts.httpclient.http.HttpClient;
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Raimund Renkert <raimund.renkert@intevation.de>
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27 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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28
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Raimund Renkert <raimund.renkert@intevation.de>
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29 import de.intevation.flys.client.shared.exceptions.ServerException;
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30
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Raimund Renkert <raimund.renkert@intevation.de>
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31 public class FileUploadServiceImpl
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Raimund Renkert <raimund.renkert@intevation.de>
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32 extends HttpServlet
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Raimund Renkert <raimund.renkert@intevation.de>
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33 {
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Raimund Renkert <raimund.renkert@intevation.de>
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34 private static final Logger logger = Logger.getLogger(FileUploadServiceImpl.class);
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Raimund Renkert <raimund.renkert@intevation.de>
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35
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Raimund Renkert <raimund.renkert@intevation.de>
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36 @Override
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Raimund Renkert <raimund.renkert@intevation.de>
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37 protected void doPost(HttpServletRequest req, HttpServletResponse resp) {
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Raimund Renkert <raimund.renkert@intevation.de>
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38 processPost(req, resp);
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Raimund Renkert <raimund.renkert@intevation.de>
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39 }
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Raimund Renkert <raimund.renkert@intevation.de>
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40
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Raimund Renkert <raimund.renkert@intevation.de>
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41
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Raimund Renkert <raimund.renkert@intevation.de>
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42 protected void processPost(HttpServletRequest req, HttpServletResponse resp) {
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Raimund Renkert <raimund.renkert@intevation.de>
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43 logger.debug("handling post request.");
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Raimund Renkert <raimund.renkert@intevation.de>
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44
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Raimund Renkert <raimund.renkert@intevation.de>
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45 String url = getServletContext().getInitParameter("server-url");
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Raimund Renkert <raimund.renkert@intevation.de>
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46
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Raimund Renkert <raimund.renkert@intevation.de>
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47 Document request = createFileXML(req);;
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Raimund Renkert <raimund.renkert@intevation.de>
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48
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Raimund Renkert <raimund.renkert@intevation.de>
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49 if (request == null) {
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Raimund Renkert <raimund.renkert@intevation.de>
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50 return;
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Raimund Renkert <raimund.renkert@intevation.de>
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51 }
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Raimund Renkert <raimund.renkert@intevation.de>
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52 HttpClient client = new HttpClientImpl(url);
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Raimund Renkert <raimund.renkert@intevation.de>
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53
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Raimund Renkert <raimund.renkert@intevation.de>
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54 try {
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Raimund Renkert <raimund.renkert@intevation.de>
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55 Document result = client.callService(url, "fileupload", request);
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Raimund Renkert <raimund.renkert@intevation.de>
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56
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Raimund Renkert <raimund.renkert@intevation.de>
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57 if (result == null) {
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Raimund Renkert <raimund.renkert@intevation.de>
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58 logger.warn("FileUpload service returned no result.");
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Raimund Renkert <raimund.renkert@intevation.de>
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59 }
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Raimund Renkert <raimund.renkert@intevation.de>
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60
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Raimund Renkert <raimund.renkert@intevation.de>
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61 return;
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Raimund Renkert <raimund.renkert@intevation.de>
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62 }
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Raimund Renkert <raimund.renkert@intevation.de>
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63 catch (ConnectionException ce) {
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Raimund Renkert <raimund.renkert@intevation.de>
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64 logger.error(ce, ce);
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Raimund Renkert <raimund.renkert@intevation.de>
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65 }
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Raimund Renkert <raimund.renkert@intevation.de>
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66 }
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67
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68
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Raimund Renkert <raimund.renkert@intevation.de>
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69 protected Document createFileXML(HttpServletRequest req) {
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Raimund Renkert <raimund.renkert@intevation.de>
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70 ServletFileUpload upload = new ServletFileUpload();
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71
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Raimund Renkert <raimund.renkert@intevation.de>
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72 try{
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Raimund Renkert <raimund.renkert@intevation.de>
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73 FileItemIterator iter = upload.getItemIterator(req);
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Raimund Renkert <raimund.renkert@intevation.de>
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74
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Raimund Renkert <raimund.renkert@intevation.de>
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75 while (iter.hasNext()) {
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Raimund Renkert <raimund.renkert@intevation.de>
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76 FileItemStream item = iter.next();
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77
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Raimund Renkert <raimund.renkert@intevation.de>
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78 String name = item.getFieldName();
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Raimund Renkert <raimund.renkert@intevation.de>
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79 InputStream stream = item.openStream();
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80
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81
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82 // Process the input stream
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Raimund Renkert <raimund.renkert@intevation.de>
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83 ByteArrayOutputStream out = new ByteArrayOutputStream();
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Raimund Renkert <raimund.renkert@intevation.de>
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84 int len;
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Raimund Renkert <raimund.renkert@intevation.de>
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85 byte[] buffer = new byte[stream.available()];
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Raimund Renkert <raimund.renkert@intevation.de>
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86 while ((len = stream.read(buffer, 0, buffer.length)) != -1) {
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Raimund Renkert <raimund.renkert@intevation.de>
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87 out.write(buffer, 0, len);
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Raimund Renkert <raimund.renkert@intevation.de>
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88 }
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89
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Raimund Renkert <raimund.renkert@intevation.de>
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90 Base64 encoder = new Base64();
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Raimund Renkert <raimund.renkert@intevation.de>
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91 String b64File = Base64.encodeBase64String(buffer);
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92
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Raimund Renkert <raimund.renkert@intevation.de>
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93 Document fileDoc = XMLUtils.newDocument();
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Raimund Renkert <raimund.renkert@intevation.de>
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94
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Raimund Renkert <raimund.renkert@intevation.de>
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95 ElementCreator ec = new ElementCreator(fileDoc, null, null);
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Raimund Renkert <raimund.renkert@intevation.de>
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96 Element root = ec.create("upload");
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Raimund Renkert <raimund.renkert@intevation.de>
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97 Element id = ec.create("artifact-uuid");
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Raimund Renkert <raimund.renkert@intevation.de>
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98 id.setTextContent(req.getParameter("uuid"));
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Raimund Renkert <raimund.renkert@intevation.de>
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99
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Raimund Renkert <raimund.renkert@intevation.de>
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100 Element data = ec.create("data");
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Raimund Renkert <raimund.renkert@intevation.de>
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101 data.setTextContent(b64File);
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102
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103 fileDoc.appendChild(root);
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104 root.appendChild(id);
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Raimund Renkert <raimund.renkert@intevation.de>
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105 root.appendChild(data);
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Raimund Renkert <raimund.renkert@intevation.de>
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106
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Raimund Renkert <raimund.renkert@intevation.de>
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107 return fileDoc;
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Raimund Renkert <raimund.renkert@intevation.de>
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108 }
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Raimund Renkert <raimund.renkert@intevation.de>
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109 }
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Raimund Renkert <raimund.renkert@intevation.de>
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110 catch(Exception e){
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Raimund Renkert <raimund.renkert@intevation.de>
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111 logger.debug("Failed to create xml document containing the file.");
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Raimund Renkert <raimund.renkert@intevation.de>
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112 logger.debug(e, e);
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113 }
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Raimund Renkert <raimund.renkert@intevation.de>
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114 return null;
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115 }
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Raimund Renkert <raimund.renkert@intevation.de>
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116 }
http://dive4elements.wald.intevation.org