--- /dev/null
+package it.unibo.cs.helm.uwobo;
+
+import java.io.*;
+import java.util.*;
+import javax.servlet.*;
+import javax.servlet.http.*;
+import javax.xml.transform.*;
+import org.xml.sax.*;
+
+/*
+*
+* usage:
+* http://aristotele/helm/servlet/uwobo/help
+* http://aristotele/helm/servlet/uwobo/add?xsluri=&key=
+* http://aristotele/helm/servlet/uwobo/remove[?key=]
+* http://aristotele/helm/servlet/uwobo/list
+* http://aristotele/helm/servlet/uwobo/reload[?key=]
+* http://aristotele/helm/servlet/uwobo/update[?key=]
+* http://aristotele/helm/servlet/uwobo/apply?xmluri=&keys=[¶m.=]*
+*
+* example:
+* http://aristotele/helm/servlet/uwobo/add?xsluri=file:///D:/Archivio/Progetti/helm/resources/xsl/foo1.xsl&key=foo1
+* http://aristotele/helm/servlet/uwobo/add?xsluri=file:///D:/Archivio/Progetti/helm/resources/xsl/foo2.xsl&key=foo2
+* http://aristotele/helm/servlet/uwobo/apply?xmluri=file:///D:/Archivio/Progetti/helm/resources/xsl/foo.xml&key=foo1&key=foo2
+*
+* installation notes (Tomcat):
+* replace parser.jar and jaxp.jar from /lib with xerces.jar
+*
+* add in conf/server.xml
+* <Context path="/helm"
+* docBase="webapps/helm"
+* crossContext="false"
+* debug="0"
+* reloadable="true" >
+* </Context>
+*
+* add in uriworkermap.properties
+* /helm/*=ajp12
+*
+* bugs:
+* directory base stylesheet inclusi
+*
+* @author Riccardo Solmi
+*/
+public class Servlet extends HttpServlet {
+ public static final String[] usage = {
+ "http://<i>hostname</i>/helm/servlet/uwobo/help",
+ "http://<i>hostname</i>/helm/servlet/uwobo/add?xsluri=<i>stylesheet</i>&key=<i>name</i>",
+ "http://<i>hostname</i>/helm/servlet/uwobo/remove[?key=<i>name</i>]",
+ "http://<i>hostname</i>/helm/servlet/uwobo/list",
+ "http://<i>hostname</i>/helm/servlet/uwobo/reload[?key=<i>name</i>]",
+ "http://<i>hostname</i>/helm/servlet/uwobo/update[?key=<i>name</i>]",
+ "http://<i>hostname</i>/helm/servlet/uwobo/apply?xmluri=<i>xmldata</i>&keys=<i>key_1,...,key_n</i>[¶m.<i>name</i>=<i>value</i>]*"
+ };
+ public static final String help;
+
+ static {
+ StringBuffer sb = new StringBuffer();
+ sb.append("<ul>");
+ for (int i=0; i<usage.length; i++)
+ sb.append("<li>").append(usage[i]).append("</li>");
+ sb.append("</ul>");
+ help = sb.toString();
+ }
+
+ private Server server;
+
+ public void init(ServletConfig config) throws ServletException
+ {
+ super.init(config);
+
+ System.out.println("UWOBO init");
+ server = new Server();
+ }
+
+ public static String[] split(final String s, final String delim)
+ {
+ StringTokenizer st = new StringTokenizer(s, delim);
+ String[] res = new String[st.countTokens()];
+ for (int i = 0; i < res.length; i++) res[i] = st.nextToken();
+ return res;
+ }
+
+ public void doGet(HttpServletRequest request, HttpServletResponse response)
+ throws ServletException, IOException
+ {
+ System.out.println("UWOBO "+request.getPathInfo());
+ ServletOutputStream out;
+
+ try {
+ final String cmd = request.getPathInfo();
+ if (cmd == null) {
+ sendError(response, HttpServletResponse.SC_NOT_FOUND, "unknown command", help);
+ return;
+ }
+ if (cmd.equals("/add")) {
+ final String filename = request.getParameter("xsluri");
+ if (filename == null) {
+ sendError(response, HttpServletResponse.SC_BAD_REQUEST, "bad parameters", usage[1]);
+ return;
+ }
+ final String key = request.getParameter("key");
+ server.add(filename, key);
+ } else if (cmd.equals("/apply")) {
+ final String infile = request.getParameter("xmluri");
+ final String keys = request.getParameter("keys");
+
+ if (infile == null || keys == null) {
+ sendError(response, HttpServletResponse.SC_BAD_REQUEST, "bad parameters", usage[6]);
+ return;
+ }
+
+ final String[] keyName = split(keys, ",");
+ final Key[] keySeq = new Key[keyName.length];
+ for (int i = 0; i < keySeq.length; i++) {
+ keySeq[i] = new Key();
+ keySeq[i].name = keyName[i];
+ keySeq[i].params = new HashMap();
+ }
+
+ final Properties props = new Properties();
+ final Enumeration e = request.getParameterNames();
+ while (e.hasMoreElements()) {
+ String param = (String) e.nextElement();
+ if (param.startsWith("param.")) {
+ final String name = param.substring(6);
+ final String value = request.getParameter(param);
+ final String[] keyParam = split(name, ".");
+ if (keyParam.length == 1) {
+ // this is a global parameter
+ Server.log("global parameter: " + keyParam[0] + " = " + value);
+ for (int i = 0; i < keySeq.length; i++)
+ // we add the global parameter only if there is no
+ // local parameter with the same name
+ if (!keySeq[i].params.containsKey(keyParam[0]))
+ keySeq[i].params.put(keyParam[0], value);
+ } else if (keyParam.length == 2) {
+ // this is a local parameter
+ Server.log("local parameter: " + keyParam[0] + "." + keyParam[1] + " = " + value);
+ for (int i = 0; i < keySeq.length; i++) {
+ if (keySeq[i].name.equals(keyParam[0]))
+ keySeq[i].params.put(keyParam[1], value);
+ }
+ } else {
+ sendError(response, HttpServletResponse.SC_BAD_REQUEST, "bad parameters", usage[6]);
+ return;
+ }
+ } else if (param.startsWith("prop.")) {
+ final String name = param.substring(5);
+ final String value = request.getParameter(param);
+ Server.log("property: " + name + " = " + value);
+ props.setProperty(name, value);
+ }
+ }
+
+ String contentType = props.getProperty(OutputKeys.MEDIA_TYPE);
+ if (contentType == null && keySeq.length > 0)
+ contentType = server.getContentType(keySeq[keySeq.length - 1].name);
+ else if (contentType == null)
+ contentType = "text/xml";
+ response.setContentType(contentType);
+ Server.log("content type: " + contentType);
+
+ out = response.getOutputStream();
+ server.apply(infile, out, keySeq, props);
+ out.close();
+ return;
+ } else if (cmd.equals("/remove")) {
+ final String key = request.getParameter("key");
+ if (key == null)
+ server.removeAll();
+ else
+ server.remove(key);
+ } else if (cmd.equals("/list")) {
+ Iterator i = server.list().iterator();
+
+ response.setContentType("text/html");
+ out = response.getOutputStream();
+ out.println("<html><body><h1>Uwobo servlet</h1><p>stylesheet list:</p><ul>");
+ while (i.hasNext())
+ out.println("<li>"+i.next()+"</li>");
+ out.println("</ul></body></html>");
+ out.close();
+ return;
+ } else if (cmd.equals("/reload")) {
+ final String key = request.getParameter("key");
+ if (key == null)
+ server.reloadAll();
+ else
+ server.reload(key);
+ } else if (cmd.equals("/update")) {
+ final String key = request.getParameter("key");
+ if (key == null)
+ server.updateAll();
+ else
+ server.update(key);
+ } else if (cmd.equals("/help")) {
+ response.setContentType("text/html");
+ out = response.getOutputStream();
+ out.println("<html><body><h1>"+server.PACKAGE+" servlet - version "+server.VERSION+"</h1>");
+ out.println("<b>compiled "+server.DATE+" at "+server.TIME.substring(0,2)+":"+server.TIME.substring(2)+"</b>");
+ out.println("<p>usage:</p>"+help+"</body></html>");
+ out.close();
+ return;
+ } else {
+ sendError(response, HttpServletResponse.SC_NOT_FOUND, "unknown command", help);
+ return;
+ }
+ } catch (TransformerConfigurationException tce) {
+ sendError(response, HttpServletResponse.SC_BAD_REQUEST, "stylesheet error", tce);
+ return;
+ } catch (SAXException se) {
+ sendError(response, HttpServletResponse.SC_BAD_REQUEST, "SAX Exception", se);
+ return;
+ } catch (Exception e) {
+ sendError(response, HttpServletResponse.SC_BAD_REQUEST, "exception", e);
+ return;
+ }
+
+ response.setContentType("text/html");
+ response.setHeader("Cache-Control", "no-cache");
+ response.setHeader("Pragma", "no-cache");
+ response.setHeader("Expires", "0");
+ out = response.getOutputStream();
+ out.println("<html><body><h1>Uwobo servlet</h1><p>done</p></body></html>");
+ out.close();
+ }
+
+ private void sendError(HttpServletResponse response, int code, String msg, Exception e) throws IOException {
+ String err;
+ if (e != null)
+ err = "<p>"+e.getMessage()+"</P>";
+ else
+ err = "";
+ response.setContentType("text/html");
+ response.sendError(code, "<html><body><h1>Uwobo servlet</h1><p>"+msg+"</p>"+err+"</body></html>");
+ }
+
+ private void sendError(HttpServletResponse response, int code, String msg, String usage) throws IOException {
+ response.setContentType("text/html");
+ response.sendError(code, "<html><body><h1>Uwobo servlet</h1><p>"+msg+"</p>usage: "+usage+"</body></html>");
+ }
+
+ public String getServletInfo() {
+ return "The UWOBO servlet";
+ }
+}
projects / helm.git / blobdiff