redirect implemented

[pnews.git] / war / src / main / java / pnews / servlet / Pnews.java

diff --git a/war/src/main/java/pnews/servlet/Pnews.java b/war/src/main/java/pnews/servlet/Pnews.java
index 85f726b..f7175a1 100644 (file)
--- a/war/src/main/java/pnews/servlet/Pnews.java
+++ b/war/src/main/java/pnews/servlet/Pnews.java
@@ -1,7 +1,89 @@
 package pnews.servlet;
 
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
 
 public class Pnews extends HttpServlet {
+        private static final Logger LOG = Logger.getLogger(Pnews.class.getName());
+        private static final long serialVersionUID = 1L;
+
+        private static String getQueryParameter(HttpServletRequest rq, String key)
+                        throws UnsupportedEncodingException {
+                String[] params;
+                int idx;
+                String q;
+                
+                q = rq.getQueryString();
+                
+                if (q == null)
+                        return null;
+                
+                params = URLDecoder.decode(q, "UTF-8").split("&");
+                
+                for (String p: params) {                        
+                        idx = p.indexOf('=');
+                                                
+                        if (idx > 1 && p.substring(0, idx).equals(key))
+                                return p.substring(idx + 1);
+                }
+                
+                return null;
+        }
+        
+        private static void redirect(HttpServletRequest rq, HttpServletResponse rp) {
+                String redirectURL;
+                
+                try {
+                        redirectURL = getQueryParameter(rq, "url");
+                                               
+                        LOG.info("Request redirection to " + redirectURL);
+                        
+                        if (redirectURL != null) {
+                                rp.setHeader("Location", redirectURL);
+                                rp.setStatus(HttpServletResponse.SC_TEMPORARY_REDIRECT);
+                        } else {
+                                rp.setStatus(HttpServletResponse.SC_NOT_FOUND);
+                        }
+
+                } catch (UnsupportedEncodingException e) {
+                        e.printStackTrace();
+                        LOG.log(Level.SEVERE, "redirect failure", e);
+                        rp.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+                }                
+        }
+        
+        @Override
+        protected void  doGet(HttpServletRequest req, HttpServletResponse resp) {
+                String path;
+                
+                LOG.info("doGet " + req.getRequestURI());
 
+                path = req.getPathInfo();
+                
+                if (path.equals("/redirect")) {
+                        redirect(req, resp);
+                } else {
+                        try {
+                                resp.getWriter().write("Not found " + req.getPathInfo());
+                                resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
+                        } catch (IOException e) {
+                                LOG.log(Level.SEVERE, "doGet failure", e);
+                        }
+                }
+        }
+        
+        @Override
+        public void init(ServletConfig config) throws ServletException {
+                LOG.info("Pnews servlet init " + config.getServletContext().getContextPath());
+                
+        }
 }