/*
 * Copyright 2014 ZXing authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.zxing.web;

import com.google.common.base.Preconditions;
import com.google.common.net.HttpHeaders;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public final class LegacyJavadocRedirectServlet extends HttpServlet {

  private static final String PREFIX = "/w/docs/javadoc/";

  @Override
  protected void doGet(HttpServletRequest request, HttpServletResponse response) {
    String requestURI = request.getRequestURI();
    Preconditions.checkArgument(requestURI.startsWith(PREFIX));
    String redirectURI = "http://zxing.github.io/zxing/apidocs/" + requestURI.substring(PREFIX.length());
    response.setStatus(HttpServletResponse.SC_MOVED_PERMANENTLY);
    response.setHeader(HttpHeaders.LOCATION, redirectURI);
  }

}

@@ -970,17 +970,16 @@
 /javadoc
-/
 %22;%0A%0A  @O
@@ -1199,100 +1199,149 @@
 g re
-directURI = %22http://zxing.github.io/zxing/apidocs/%22 + requestURI.substring(PREFIX.length());
+questWithoutPrefix = requestURI.substring(PREFIX.length());%0A    if (requestWithoutPrefix.isEmpty()) %7B%0A      requestWithoutPrefix = %22/%22;%0A    %7D
 %0A   
@@ -1452,19 +1452,69 @@
 ON, 
-redirectURI
+%22http://zxing.github.io/zxing/apidocs%22 + requestWithoutPrefix
 );%0A 

Fix corner case for javadoc redirector