knowledge/org.argeo.support.odk/src/org/argeo/support/odk/servlet/OdkFormListServlet.java

   1 package org.argeo.support.odk.servlet;
   2
   3 import java.io.IOException;
   4 import java.io.Writer;
   5 import java.util.Collections;
   6 import java.util.HashSet;
   7 import java.util.Set;
   8
   9 import javax.servlet.ServletException;
  10 import javax.servlet.http.HttpServlet;
  11 import javax.servlet.http.HttpServletRequest;
  12 import javax.servlet.http.HttpServletResponse;
  13
  14 import org.apache.commons.logging.Log;
  15 import org.apache.commons.logging.LogFactory;
  16 import org.argeo.support.odk.OdkForm;
  17
  18 /** Lists available forms. */
  19 public class OdkFormListServlet extends HttpServlet {
  20         private static final long serialVersionUID = 2706191315048423321L;
  21         private final static Log log = LogFactory.getLog(OdkFormListServlet.class);
  22
  23         private Set<OdkForm> odkForms = Collections.synchronizedSet(new HashSet<>());
  24
  25         @Override
  26         protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
  27                 resp.setContentType("text/xml; charset=utf-8");
  28                 resp.setHeader("X-OpenRosa-Version", "1.0");
  29                 resp.setDateHeader("Date", System.currentTimeMillis());
  30
  31                 String serverName = req.getServerName();
  32                 int serverPort = req.getServerPort();
  33                 String protocol = serverPort == 443 || req.isSecure() ? "https" : "http";
  34
  35                 Writer writer = resp.getWriter();
  36                 writer.append("<?xml version='1.0' encoding='UTF-8' ?>");
  37                 writer.append("<xforms xmlns=\"http://openrosa.org/xforms/xformsList\">");
  38                 for (OdkForm form : odkForms) {
  39                         StringBuilder sb = new StringBuilder();
  40                         sb.append("<xform>");
  41                         sb.append("<formID>" + form.getFormId() + "</formID>");
  42                         sb.append("<name>" + form.getName() + "</name>");
  43                         sb.append("<version>" + form.getVersion() + "</version>");
  44                         sb.append("<hash>" + form.getHash(null) + "</hash>");
  45                         sb.append("<descriptionText>" + form.getDescription() + "</descriptionText>");
  46                         sb.append("<downloadUrl>" + protocol + "://" + serverName
  47                                         + (serverPort == 80
  48                                                         || serverPort == 443 ? "" : ":" + serverPort) + "/api/odk/" + form.getFileName()
  49                                         + "</downloadUrl>");
  50                         sb.append("</xform>");
  51                         String str = sb.toString();
  52                         if (log.isDebugEnabled())
  53                                 log.debug(str);
  54                         writer.append(str);
  55                 }
  56                 writer.append("</xforms>");
  57         }
  58
  59         public void addForm(OdkForm odkForm) {
  60                 odkForms.add(odkForm);
  61         }
  62
  63         public void removeForm(OdkForm odkForm) {
  64                 odkForms.remove(odkForm);
  65         }
  66 }