Introduce ODK forms support.

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

diff --git a/knowledge/org.argeo.support.odk/src/org/argeo/support/odk/servlet/OdkFormServlet.java b/knowledge/org.argeo.support.odk/src/org/argeo/support/odk/servlet/OdkFormServlet.java
new file mode 100644 (file)
index 0000000..3746da8
--- /dev/null
+++ b/knowledge/org.argeo.support.odk/src/org/argeo/support/odk/servlet/OdkFormServlet.java
@@ -0,0 +1,50 @@
+package org.argeo.support.odk.servlet;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.apache.commons.io.FilenameUtils;
+import org.argeo.support.odk.OdkForm;
+
+/** Retrieves a single form. */
+public class OdkFormServlet extends HttpServlet {
+       private static final long serialVersionUID = 7838305967987687370L;
+
+       private Map<String, OdkForm> odkForms = Collections.synchronizedMap(new HashMap<>());
+
+       @Override
+       protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
+               resp.setContentType("text/xml; charset=utf-8");
+
+               String path = req.getServletPath();
+               String fileName = FilenameUtils.getName(path);
+               OdkForm form = odkForms.get(fileName);
+               if (form == null)
+                       throw new IllegalArgumentException("No form named " + fileName + " was found");
+
+               byte[] buffer = new byte[1024];
+               try (InputStream in = form.openStream(); OutputStream out = resp.getOutputStream();) {
+                       int bytesRead;
+                       while ((bytesRead = in.read(buffer)) != -1)
+                               out.write(buffer, 0, bytesRead);
+               }
+       }
+
+       public void addForm(OdkForm odkForm) {
+               odkForms.put(odkForm.getFileName(), odkForm);
+       }
+
+       public void removeForm(OdkForm odkForm) {
+               odkForms.remove(odkForm.getFileName());
+       }
+
+}