Mercurial > dive4elements > river
view flys-client/src/main/java/de/intevation/flys/client/server/FileUploadServiceImpl.java @ 3497:88feb3347aa5
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 | b9433322fcaf |
children | 02cf2b1dff84 |
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package de.intevation.flys.client.server; import de.intevation.artifacts.common.utils.XMLUtils; import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; import de.intevation.artifacts.httpclient.exceptions.ConnectionException; import de.intevation.artifacts.httpclient.http.HttpClient; import de.intevation.artifacts.httpclient.http.HttpClientImpl; import java.io.ByteArrayOutputStream; import java.io.InputStream; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.codec.binary.Base64; import org.apache.commons.fileupload.FileItemIterator; import org.apache.commons.fileupload.FileItemStream; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.log4j.Logger; import org.w3c.dom.Document; import org.w3c.dom.Element; public class FileUploadServiceImpl extends HttpServlet { private static final Logger logger = Logger.getLogger(FileUploadServiceImpl.class); @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) { processPost(req, resp); } protected void processPost(HttpServletRequest req, HttpServletResponse resp) { logger.debug("handling post request."); String url = getServletContext().getInitParameter("server-url"); Document request = createFileXML(req);; if (request == null) { return; } HttpClient client = new HttpClientImpl(url); try { Document result = client.callService(url, "fileupload", request); if (result == null) { logger.warn("FileUpload service returned no result."); } return; } catch (ConnectionException ce) { logger.error(ce, ce); } } protected Document createFileXML(HttpServletRequest req) { ServletFileUpload upload = new ServletFileUpload(); try{ FileItemIterator iter = upload.getItemIterator(req); while (iter.hasNext()) { FileItemStream item = iter.next(); String name = item.getFieldName(); InputStream stream = item.openStream(); // Process the input stream ByteArrayOutputStream out = new ByteArrayOutputStream(); int len; byte[] buffer = new byte[stream.available()]; while ((len = stream.read(buffer, 0, buffer.length)) != -1) { out.write(buffer, 0, len); } buffer = Base64.encodeBase64(buffer); String b64File = new String(buffer); Document fileDoc = XMLUtils.newDocument(); ElementCreator ec = new ElementCreator(fileDoc, null, null); Element root = ec.create("upload"); Element id = ec.create("artifact-uuid"); id.setTextContent(req.getParameter("uuid")); Element data = ec.create("data"); data.setTextContent(b64File); fileDoc.appendChild(root); root.appendChild(id); root.appendChild(data); return fileDoc; } } catch(Exception e){ logger.debug("Failed to create xml document containing the file."); logger.debug(e, e); } return null; } }