annotate flys-client/src/main/java/de/intevation/flys/client/server/FileUploadServiceImpl.java @ 4154:92021091b03d

Avoid another possible NullPointerException in GaugeTree
author Björn Ricks <bjoern.ricks@intevation.de>
date Tue, 16 Oct 2012 14:42:51 +0200
parents b9433322fcaf
children 02cf2b1dff84
rev   line source
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Raimund Renkert <raimund.renkert@intevation.de>
parents:
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1 package de.intevation.flys.client.server;
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2
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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3 import de.intevation.artifacts.common.utils.XMLUtils;
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b9433322fcaf Add alpha transp. and fix exceptions on unknown style attributes.
Christian Lins <christian.lins@intevation.de>
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4 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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5 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
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6 import de.intevation.artifacts.httpclient.http.HttpClient;
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7 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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8
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9 import java.io.ByteArrayOutputStream;
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10 import java.io.InputStream;
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11
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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 org.apache.commons.codec.binary.Base64;
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17 import org.apache.commons.fileupload.FileItemIterator;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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18 import org.apache.commons.fileupload.FileItemStream;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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19 import org.apache.commons.fileupload.servlet.ServletFileUpload;
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20 import org.apache.log4j.Logger;
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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21 import org.w3c.dom.Document;
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22 import org.w3c.dom.Element;
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23
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24 public class FileUploadServiceImpl
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25 extends HttpServlet
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26 {
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27 private static final Logger logger = Logger.getLogger(FileUploadServiceImpl.class);
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28
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29 @Override
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30 protected void doPost(HttpServletRequest req, HttpServletResponse resp) {
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31 processPost(req, resp);
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32 }
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33
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34
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35 protected void processPost(HttpServletRequest req, HttpServletResponse resp) {
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36 logger.debug("handling post request.");
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37
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38 String url = getServletContext().getInitParameter("server-url");
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39
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Raimund Renkert <raimund.renkert@intevation.de>
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40 Document request = createFileXML(req);;
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41
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Raimund Renkert <raimund.renkert@intevation.de>
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42 if (request == null) {
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43 return;
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44 }
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45 HttpClient client = new HttpClientImpl(url);
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46
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47 try {
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48 Document result = client.callService(url, "fileupload", request);
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49
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50 if (result == null) {
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Raimund Renkert <raimund.renkert@intevation.de>
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51 logger.warn("FileUpload service returned no result.");
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52 }
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53
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Raimund Renkert <raimund.renkert@intevation.de>
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54 return;
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55 }
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Raimund Renkert <raimund.renkert@intevation.de>
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56 catch (ConnectionException ce) {
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57 logger.error(ce, ce);
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58 }
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59 }
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60
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61
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62 protected Document createFileXML(HttpServletRequest req) {
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63 ServletFileUpload upload = new ServletFileUpload();
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64
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65 try{
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66 FileItemIterator iter = upload.getItemIterator(req);
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67
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68 while (iter.hasNext()) {
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69 FileItemStream item = iter.next();
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70
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71 String name = item.getFieldName();
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72 InputStream stream = item.openStream();
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73
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74 // Process the input stream
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75 ByteArrayOutputStream out = new ByteArrayOutputStream();
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76 int len;
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77 byte[] buffer = new byte[stream.available()];
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78 while ((len = stream.read(buffer, 0, buffer.length)) != -1) {
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79 out.write(buffer, 0, len);
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80 }
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81
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b9433322fcaf Add alpha transp. and fix exceptions on unknown style attributes.
Christian Lins <christian.lins@intevation.de>
parents: 2497
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82 buffer = Base64.encodeBase64(buffer);
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Christian Lins <christian.lins@intevation.de>
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83 String b64File = new String(buffer);
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84
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85 Document fileDoc = XMLUtils.newDocument();
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86
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87 ElementCreator ec = new ElementCreator(fileDoc, null, null);
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88 Element root = ec.create("upload");
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89 Element id = ec.create("artifact-uuid");
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90 id.setTextContent(req.getParameter("uuid"));
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91
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92 Element data = ec.create("data");
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93 data.setTextContent(b64File);
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94
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95 fileDoc.appendChild(root);
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96 root.appendChild(id);
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97 root.appendChild(data);
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98
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99 return fileDoc;
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100 }
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101 }
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102 catch(Exception e){
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103 logger.debug("Failed to create xml document containing the file.");
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104 logger.debug(e, e);
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105 }
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106 return null;
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107 }
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108 }

http://dive4elements.wald.intevation.org