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1 import java.io.*;
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2 import java.net.*;
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3 import java.util.*;
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4 import javax.servlet.*;
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5 import javax.servlet.http.*;
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6 import javax.xml.transform.*;
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7 import javax.xml.transform.dom.*;
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8 import javax.xml.transform.stream.*;
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9 import org.apache.xerces.parsers.DOMParser;
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10 import org.apache.xpath.*;
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11 import org.w3c.dom.*;
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12
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13 public class Relato extends HttpServlet {
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14
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15 public final static String FS = System.getProperty("file.separator");
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16
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17 // Respond to HTTP GET requests from browsers.
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18 public void doGet (HttpServletRequest request, HttpServletResponse response)
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19 throws ServletException, IOException {
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20
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21 Hashtable params = new Hashtable();
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22 Enumeration enum = request.getParameterNames();
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23 while (enum.hasMoreElements()) {
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24 String pName = (String) enum.nextElement();
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25 params.put(pName, request.getParameter(pName));
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26
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27 }
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28 // Set content type for HTML.
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29 response.setContentType("text/html; charset=UTF-8");
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30 // Output goes to the response PrintWriter.
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31 PrintWriter out = response.getWriter();
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32 DOMParser parser = new DOMParser();
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33
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34 try {
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35 TransformerFactory tFactory = TransformerFactory.newInstance();
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36 //get the real path for xml and xsl files.
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37 String ctx = getServletContext().getRealPath("") + FS;
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38
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39 parser.parse(ctx + (String) params.get("xml"));
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40 Document document = parser.getDocument();
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41
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42 Element topFrameset = (Element) XPathAPI.selectSingleNode(document, "/relato/frames/frameset");
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43 topFrameset.setAttribute("onload", "init();");
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44
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45 NodeList nodelist = XPathAPI.selectNodeList(document, "//frameset/frame");
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46 for (int i = 0; i < nodelist.getLength(); i++) {
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47 Element elem = (Element)nodelist.item(i);
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48 String name = elem.getAttribute("name");
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49 if (name != "") {
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50 if (params.containsKey(name)) {
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51 String src = (String) params.get(name);
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52 elem.setAttribute("src", src);
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53 }
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54 }
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55 }
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56
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57 Source xmlSource = new DOMSource (document);
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58 Source xslSource = new StreamSource (new URL("file", "", ctx+"relato/relato.xsl").openStream());
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59 // Generate the transformer.
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60 Transformer transformer = tFactory.newTransformer(xslSource);
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61 // Perform the transformation, sending the output to the response.
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62 transformer.transform(xmlSource, new StreamResult(out));
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63 }
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64
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65 // If an Exception occurs, return the error to the client.
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66 catch (Exception e) {
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67 out.write(e.getMessage());
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68 e.printStackTrace(out);
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69 }
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70
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71 // Close the PrintWriter.
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72 out.close();
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73 }
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74 }
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