| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.catalina.util; |
| |
| public class StandardSessionIdGenerator extends SessionIdGeneratorBase { |
| |
| @Override |
| public String generateSessionId(String route) { |
| |
| byte random[] = new byte[16]; |
| int sessionIdLength = getSessionIdLength(); |
| |
| // Render the result as a String of hexadecimal digits |
| // Start with enough space for sessionIdLength and medium route size |
| StringBuilder buffer = new StringBuilder(2 * sessionIdLength + 20); |
| |
| int resultLenBytes = 0; |
| |
| while (resultLenBytes < sessionIdLength) { |
| getRandomBytes(random); |
| for (int j = 0; |
| j < random.length && resultLenBytes < sessionIdLength; |
| j++) { |
| byte b1 = (byte) ((random[j] & 0xf0) >> 4); |
| byte b2 = (byte) (random[j] & 0x0f); |
| if (b1 < 10) |
| buffer.append((char) ('0' + b1)); |
| else |
| buffer.append((char) ('A' + (b1 - 10))); |
| if (b2 < 10) |
| buffer.append((char) ('0' + b2)); |
| else |
| buffer.append((char) ('A' + (b2 - 10))); |
| resultLenBytes++; |
| } |
| } |
| |
| if (route != null && route.length() > 0) { |
| buffer.append('.').append(route); |
| } else { |
| String jvmRoute = getJvmRoute(); |
| if (jvmRoute != null && jvmRoute.length() > 0) { |
| buffer.append('.').append(jvmRoute); |
| } |
| } |
| |
| return buffer.toString(); |
| } |
| } |