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.gitweb;
      16             : 
      17             : import static com.google.gerrit.common.FileUtil.lastModified;
      18             : import static java.nio.charset.StandardCharsets.UTF_8;
      19             : 
      20             : import com.google.gerrit.httpd.HtmlDomUtil;
      21             : import com.google.gerrit.server.config.GitwebCgiConfig;
      22             : import com.google.gerrit.server.config.SitePaths;
      23             : import com.google.gerrit.util.http.CacheHeaders;
      24             : import com.google.gerrit.util.http.RequestUtil;
      25             : import com.google.inject.Inject;
      26             : import com.google.inject.Singleton;
      27             : import java.io.IOException;
      28             : import java.nio.file.Path;
      29             : import java.util.concurrent.TimeUnit;
      30             : import javax.servlet.ServletOutputStream;
      31             : import javax.servlet.http.HttpServlet;
      32             : import javax.servlet.http.HttpServletRequest;
      33             : import javax.servlet.http.HttpServletResponse;
      34             : 
      35             : abstract class GitwebCssServlet extends HttpServlet {
      36             :   private static final long serialVersionUID = 1L;
      37             : 
      38             :   @Singleton
      39             :   static class Site extends GitwebCssServlet {
      40             :     private static final long serialVersionUID = 1L;
      41             : 
      42             :     @Inject
      43             :     Site(SitePaths paths) throws IOException {
      44           0 :       super(paths.site_css);
      45           0 :     }
      46             :   }
      47             : 
      48             :   @Singleton
      49             :   static class Default extends GitwebCssServlet {
      50             :     private static final long serialVersionUID = 1L;
      51             : 
      52             :     @Inject
      53             :     Default(GitwebCgiConfig gwcc) throws IOException {
      54           0 :       super(gwcc.getGitwebCss());
      55           0 :     }
      56             :   }
      57             : 
      58             :   private final long modified;
      59             :   private final byte[] raw_css;
      60             :   private final byte[] gz_css;
      61             : 
      62           0 :   GitwebCssServlet(Path src) throws IOException {
      63           0 :     if (src != null) {
      64           0 :       final Path dir = src.getParent();
      65           0 :       final String name = src.getFileName().toString();
      66           0 :       final String raw = HtmlDomUtil.readFile(dir, name);
      67           0 :       if (raw != null) {
      68           0 :         modified = lastModified(src);
      69           0 :         raw_css = raw.getBytes(UTF_8);
      70           0 :         gz_css = HtmlDomUtil.compress(raw_css);
      71             :       } else {
      72           0 :         modified = -1L;
      73           0 :         raw_css = null;
      74           0 :         gz_css = null;
      75             :       }
      76           0 :     } else {
      77           0 :       modified = -1;
      78           0 :       raw_css = null;
      79           0 :       gz_css = null;
      80             :     }
      81           0 :   }
      82             : 
      83             :   @Override
      84             :   protected long getLastModified(HttpServletRequest req) {
      85           0 :     return modified;
      86             :   }
      87             : 
      88             :   @Override
      89             :   protected void doGet(HttpServletRequest req, HttpServletResponse rsp) throws IOException {
      90           0 :     if (raw_css != null) {
      91           0 :       rsp.setContentType("text/css");
      92           0 :       rsp.setCharacterEncoding(UTF_8.name());
      93             :       final byte[] toSend;
      94           0 :       if (RequestUtil.acceptsGzipEncoding(req)) {
      95           0 :         rsp.setHeader("Content-Encoding", "gzip");
      96           0 :         toSend = gz_css;
      97             :       } else {
      98           0 :         toSend = raw_css;
      99             :       }
     100           0 :       rsp.setContentLength(toSend.length);
     101           0 :       rsp.setDateHeader("Last-Modified", modified);
     102           0 :       CacheHeaders.setCacheable(req, rsp, 5, TimeUnit.MINUTES);
     103             : 
     104           0 :       try (ServletOutputStream os = rsp.getOutputStream()) {
     105           0 :         os.write(toSend);
     106             :       }
     107           0 :     } else {
     108           0 :       CacheHeaders.setNotCacheable(rsp);
     109           0 :       rsp.sendError(HttpServletResponse.SC_NOT_FOUND);
     110             :     }
     111           0 :   }
     112             : }