Line data    Source code

       1             : // Copyright (C) 2013 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;
      16             : 
      17             : import static java.nio.charset.StandardCharsets.UTF_8;
      18             : 
      19             : import com.google.gerrit.common.Nullable;
      20             : import com.google.inject.Inject;
      21             : import com.google.inject.Provider;
      22             : import java.io.UnsupportedEncodingException;
      23             : import java.net.URLDecoder;
      24             : import javax.servlet.http.HttpServletRequest;
      25             : 
      26             : public class CanonicalWebUrl {
      27             :   private final Provider<String> configured;
      28             : 
      29             :   @Inject
      30             :   CanonicalWebUrl(
      31          99 :       @com.google.gerrit.server.config.CanonicalWebUrl @Nullable Provider<String> provider) {
      32          99 :     configured = provider;
      33          99 :   }
      34             : 
      35             :   public String get(HttpServletRequest req) {
      36           0 :     String url = configured.get();
      37           0 :     return url != null ? url : computeFromRequest(req);
      38             :   }
      39             : 
      40             :   @SuppressWarnings("JdkObsolete")
      41             :   static String computeFromRequest(HttpServletRequest req) {
      42           0 :     StringBuffer url = req.getRequestURL();
      43             :     try {
      44           0 :       url = new StringBuffer(URLDecoder.decode(url.toString(), UTF_8.name()));
      45           0 :       url.setLength(url.length() - req.getServletPath().length());
      46           0 :       if (url.charAt(url.length() - 1) != '/') {
      47           0 :         url.append('/');
      48             :       }
      49           0 :       return url.toString();
      50           0 :     } catch (UnsupportedEncodingException e) {
      51           0 :       throw new IllegalStateException("Unsupported encoding for request URL " + url, e);
      52             :     }
      53             :   }
      54             : }