Mercurial > dive4elements > river

comparison 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
comparison
equal deleted inserted replaced
2493:f905c936ffff 2494:88b51e6e0334
1 package de.intevation.flys.client.server;
2
3 import java.io.InputStream;
4 import java.io.ByteArrayOutputStream;
5
6 import org.apache.log4j.Logger;
7 import org.apache.commons.codec.binary.Base64;
8 import org.apache.commons.fileupload.FileItemIterator;
9 import org.apache.commons.fileupload.FileItemStream;
10 import org.apache.commons.fileupload.servlet.ServletFileUpload;
11 import org.apache.commons.fileupload.FileUploadException;
12
13 import org.w3c.dom.Document;
14 import org.w3c.dom.Element;
15
16 import javax.servlet.http.HttpServlet;
17 import javax.servlet.http.HttpServletRequest;
18 import javax.servlet.http.HttpServletResponse;
19
20 import com.google.gwt.user.server.rpc.RemoteServiceServlet;
21
22 import de.intevation.artifacts.common.utils.XMLUtils;
23 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
24
25 import de.intevation.artifacts.httpclient.exceptions.ConnectionException;
26 import de.intevation.artifacts.httpclient.http.HttpClient;
27 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
28
29 import de.intevation.flys.client.shared.exceptions.ServerException;
30
31 public class FileUploadServiceImpl
32 extends HttpServlet
33 {
34 private static final Logger logger = Logger.getLogger(FileUploadServiceImpl.class);
35
36 @Override
37 protected void doPost(HttpServletRequest req, HttpServletResponse resp) {
38 processPost(req, resp);
39 }
40
41
42 protected void processPost(HttpServletRequest req, HttpServletResponse resp) {
43 logger.debug("handling post request.");
44
45 String url = getServletContext().getInitParameter("server-url");
46
47 Document request = createFileXML(req);;
48
49 if (request == null) {
50 return;
51 }
52 HttpClient client = new HttpClientImpl(url);
53
54 try {
55 Document result = client.callService(url, "fileupload", request);
56
57 if (result == null) {
58 logger.warn("FileUpload service returned no result.");
59 }
60
61 return;
62 }
63 catch (ConnectionException ce) {
64 logger.error(ce, ce);
65 }
66 }
67
68
69 protected Document createFileXML(HttpServletRequest req) {
70 ServletFileUpload upload = new ServletFileUpload();
71
72 try{
73 FileItemIterator iter = upload.getItemIterator(req);
74
75 while (iter.hasNext()) {
76 FileItemStream item = iter.next();
77
78 String name = item.getFieldName();
79 InputStream stream = item.openStream();
80
81
82 // Process the input stream
83 ByteArrayOutputStream out = new ByteArrayOutputStream();
84 int len;
85 byte[] buffer = new byte[stream.available()];
86 while ((len = stream.read(buffer, 0, buffer.length)) != -1) {
87 out.write(buffer, 0, len);
88 }
89
90 Base64 encoder = new Base64();
91 String b64File = Base64.encodeBase64String(buffer);
92
93 Document fileDoc = XMLUtils.newDocument();
94
95 ElementCreator ec = new ElementCreator(fileDoc, null, null);
96 Element root = ec.create("upload");
97 Element id = ec.create("artifact-uuid");
98 id.setTextContent(req.getParameter("uuid"));
99
100 Element data = ec.create("data");
101 data.setTextContent(b64File);
102
103 fileDoc.appendChild(root);
104 root.appendChild(id);
105 root.appendChild(data);
106
107 return fileDoc;
108 }
109 }
110 catch(Exception e){
111 logger.debug("Failed to create xml document containing the file.");
112 logger.debug(e, e);
113 }
114 return null;
115 }
116 }
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