From 1bfa47c942022dbf4b294cdd494b728deb84298b Mon Sep 17 00:00:00 2001
From: gregor <gregor@d688527b-c9ab-4aba-bd8d-4036d912da1d>
Date: Mon, 1 Dec 2003 09:29:01 +0000
Subject: Zwischenstand

git-svn-id: https://joinup.ec.europa.eu/svn/moa-idspss/trunk@65 d688527b-c9ab-4aba-bd8d-4036d912da1d
---
 .../spss/slinterface/servlets/ReturnServlet.java   | 125 +++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 spss.slinterface/WEB-INF/src/at/gv/egovernment/moa/spss/slinterface/servlets/ReturnServlet.java

(limited to 'spss.slinterface/WEB-INF/src/at/gv/egovernment/moa/spss/slinterface/servlets/ReturnServlet.java')

diff --git a/spss.slinterface/WEB-INF/src/at/gv/egovernment/moa/spss/slinterface/servlets/ReturnServlet.java b/spss.slinterface/WEB-INF/src/at/gv/egovernment/moa/spss/slinterface/servlets/ReturnServlet.java
new file mode 100644
index 000000000..c37e6f697
--- /dev/null
+++ b/spss.slinterface/WEB-INF/src/at/gv/egovernment/moa/spss/slinterface/servlets/ReturnServlet.java
@@ -0,0 +1,125 @@
+/*
+ * Created on 25.11.2003
+ *
+ * (c) Stabsstelle IKT-Strategie des Bundes
+ */
+package at.gv.egovernment.moa.spss.slinterface.servlets;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.URL;
+import java.net.URLConnection;
+
+import javax.servlet.ServletException;
+import javax.servlet.ServletResponse;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+
+import org.apache.log4j.Logger;
+import org.w3c.dom.Document;
+
+import at.gv.egovernment.moa.spss.slinterface.Constants;
+import at.gv.egovernment.moa.spss.slinterface.Utils;
+import at.gv.egovernment.moa.spss.slinterface.moainvoker.MOAInvoker;
+
+/**
+ * @author Gregor Karlinger (mailto:gregor.karlinger@cio.gv.at) 
+ */
+public class ReturnServlet extends HttpServlet
+{
+
+  private static Logger logger_ = Logger.getLogger(Constants.LH_SERVLETS_);
+
+  /**
+   * Default constructor.
+   */
+  public ReturnServlet()
+  {
+    super();
+  }
+  
+  public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException
+  {
+    // Get session
+    HttpSession session = request.getSession(false);
+    if (session == null)
+    {
+      String message = "No session available";
+      logger_.error(message);
+      throw new ServletException(message);
+    }
+    
+    // Get original SL request from session
+    SLRequest slRequest = (SLRequest) session.getAttribute("slRequest");
+    if (slRequest == null)
+    {
+      String message = "Session object \"slRequest\" not available.";
+      logger_.error(message);
+      throw new ServletException(message);
+    }
+    
+    // Get SL response from session
+    Document slResponseDoc = (Document) session.getAttribute("slResponseDoc");
+    if (slResponseDoc == null)
+    {
+      String message = "Session object \"slResponseDoc\" not available.";
+      logger_.error(message);
+      throw new ServletException(message);
+    }
+    
+    URLConnection dataURLConn;
+    try
+    {
+      // Open connection to DataURL
+      URL dataURL = new URL(slRequest.dataUrl_);
+      dataURLConn = dataURL.openConnection();
+      dataURLConn.setDoOutput(true);
+      OutputStream dataURLOS = dataURLConn.getOutputStream();     
+      MOAInvoker.serializeDocument(slResponseDoc, dataURLOS);
+      dataURLOS.flush();
+    }
+    catch (Exception e)
+    {
+      String message = "Sending SL XML response to DataURL failed.";
+      logger_.error(message, e);
+      throw new ServletException(message, e);
+    }
+
+    // Forward response from DataURL to client
+    forwardResponse(dataURLConn, response);
+    
+    session.invalidate();
+  }
+
+  /* ---------------------------------------------------------------------------------------------------- */
+
+  private void forwardResponse(URLConnection dataURLConn, ServletResponse response) throws ServletException
+  {
+    // Make sure that content type of DataURL response is text/html
+    String dataURLContentType = dataURLConn.getContentType();
+    if (dataURLContentType == null || !dataURLContentType.startsWith("text/html"))
+    {
+      String message = "Unsupported content type of DataURL response: \"" + dataURLContentType + "\".";
+      logger_.error(message);
+      throw new ServletException(message);
+    }
+    
+    try
+    {
+      InputStream dataURLIS = dataURLConn.getInputStream();
+      byte[] dataURLResponse = Utils.readFromInputStream(dataURLIS);
+      response.setContentType("text/html");
+      OutputStream responseOS = response.getOutputStream();
+      responseOS.write(dataURLResponse);
+      responseOS.flush();
+    }
+    catch (Exception e)
+    {
+      String message = "Forwarding DataURL response to client failed.";
+      logger_.error(message, e);
+      throw new ServletException(message, e);
+    }
+  }
+}
-- 
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