Line data    Source code

       1             : // Copyright (C) 2009 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.httpd.raw;
      16             : 
      17             : import com.google.gerrit.httpd.HtmlDomUtil;
      18             : import com.google.gerrit.util.http.CacheHeaders;
      19             : import com.google.gerrit.util.http.RequestUtil;
      20             : import com.google.inject.Inject;
      21             : import com.google.inject.Singleton;
      22             : import java.io.FileNotFoundException;
      23             : import java.io.IOException;
      24             : import java.io.OutputStream;
      25             : import javax.servlet.http.HttpServlet;
      26             : import javax.servlet.http.HttpServletRequest;
      27             : import javax.servlet.http.HttpServletResponse;
      28             : 
      29             : /**
      30             :  * Redirects from {@code /Gerrit#foo} to {@code /#foo} in JavaScript.
      31             :  *
      32             :  * <p>This redirect exists to convert the older /Gerrit URL into the more modern URL format which
      33             :  * does not use a servlet name for the host page. We cannot do the redirect here in the server side,
      34             :  * as it would lose any history token that appears in the URL. Instead we send an HTML page which
      35             :  * instructs the browser to replace the URL, but preserve the history token.
      36             :  */
      37             : @Singleton
      38             : public class LegacyGerritServlet extends HttpServlet {
      39             :   private static final long serialVersionUID = 1L;
      40             : 
      41             :   private final byte[] raw;
      42             :   private final byte[] compressed;
      43             : 
      44             :   @Inject
      45           0 :   LegacyGerritServlet() throws IOException {
      46           0 :     final String pageName = "LegacyGerrit.html";
      47           0 :     final String doc = HtmlDomUtil.readFile(getClass(), pageName);
      48           0 :     if (doc == null) {
      49           0 :       throw new FileNotFoundException("No " + pageName + " in webapp");
      50             :     }
      51             : 
      52           0 :     raw = doc.getBytes(HtmlDomUtil.ENC);
      53           0 :     compressed = HtmlDomUtil.compress(raw);
      54           0 :   }
      55             : 
      56             :   @Override
      57             :   protected void doGet(HttpServletRequest req, HttpServletResponse rsp) throws IOException {
      58             :     final byte[] tosend;
      59           0 :     if (RequestUtil.acceptsGzipEncoding(req)) {
      60           0 :       rsp.setHeader("Content-Encoding", "gzip");
      61           0 :       tosend = compressed;
      62             :     } else {
      63           0 :       tosend = raw;
      64             :     }
      65             : 
      66           0 :     CacheHeaders.setNotCacheable(rsp);
      67           0 :     rsp.setContentType("text/html");
      68           0 :     rsp.setCharacterEncoding(HtmlDomUtil.ENC.name());
      69           0 :     rsp.setContentLength(tosend.length);
      70           0 :     try (OutputStream out = rsp.getOutputStream()) {
      71           0 :       out.write(tosend);
      72             :     }
      73           0 :   }
      74             : }