Introduce ODK forms support.

[gpl/argeo-suite.git] / knowledge / org.argeo.support.odk / src / org / argeo / support / odk / servlet / OdkFormListServlet.java

diff --git a/knowledge/org.argeo.support.odk/src/org/argeo/support/odk/servlet/OdkFormListServlet.java b/knowledge/org.argeo.support.odk/src/org/argeo/support/odk/servlet/OdkFormListServlet.java
new file mode 100644 (file)
index 0000000..8398c7f
--- /dev/null
+++ b/knowledge/org.argeo.support.odk/src/org/argeo/support/odk/servlet/OdkFormListServlet.java
@@ -0,0 +1,66 @@
+package org.argeo.support.odk.servlet;
+
+import java.io.IOException;
+import java.io.Writer;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.support.odk.OdkForm;
+
+/** Lists available forms. */
+public class OdkFormListServlet extends HttpServlet {
+       private static final long serialVersionUID = 2706191315048423321L;
+       private final static Log log = LogFactory.getLog(OdkFormListServlet.class);
+
+       private Set<OdkForm> odkForms = Collections.synchronizedSet(new HashSet<>());
+
+       @Override
+       protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+               resp.setContentType("text/xml; charset=utf-8");
+               resp.setHeader("X-OpenRosa-Version", "1.0");
+               resp.setDateHeader("Date", System.currentTimeMillis());
+
+               String serverName = req.getServerName();
+               int serverPort = req.getServerPort();
+               String protocol = serverPort == 443 || req.isSecure() ? "https" : "http";
+
+               Writer writer = resp.getWriter();
+               writer.append("<?xml version='1.0' encoding='UTF-8' ?>");
+               writer.append("<xforms xmlns=\"http://openrosa.org/xforms/xformsList\">");
+               for (OdkForm form : odkForms) {
+                       StringBuilder sb = new StringBuilder();
+                       sb.append("<xform>");
+                       sb.append("<formID>" + form.getFormId() + "</formID>");
+                       sb.append("<name>" + form.getName() + "</name>");
+                       sb.append("<version>" + form.getVersion() + "</version>");
+                       sb.append("<hash>" + form.getHash(null) + "</hash>");
+                       sb.append("<descriptionText>" + form.getDescription() + "</descriptionText>");
+                       sb.append("<downloadUrl>" + protocol + "://" + serverName
+                                       + (serverPort == 80
+                                                       || serverPort == 443 ? "" : ":" + serverPort) + "/api/odk/" + form.getFileName()
+                                       + "</downloadUrl>");
+                       sb.append("</xform>");
+                       String str = sb.toString();
+                       if (log.isDebugEnabled())
+                               log.debug(str);
+                       writer.append(str);
+               }
+               writer.append("</xforms>");
+       }
+
+       public void addForm(OdkForm odkForm) {
+               odkForms.add(odkForm);
+       }
+
+       public void removeForm(OdkForm odkForm) {
+               odkForms.remove(odkForm);
+       }
+}