64 lines
2.3 KiB
Java
64 lines
2.3 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina.util;
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public class StandardSessionIdGenerator extends SessionIdGeneratorBase {
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@Override
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public String generateSessionId(String route) {
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byte random[] = new byte[16];
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int sessionIdLength = getSessionIdLength();
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// Render the result as a String of hexadecimal digits
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// Start with enough space for sessionIdLength and medium route size
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StringBuilder buffer = new StringBuilder(2 * sessionIdLength + 20);
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int resultLenBytes = 0;
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while (resultLenBytes < sessionIdLength) {
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getRandomBytes(random);
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for (int j = 0;
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j < random.length && resultLenBytes < sessionIdLength;
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j++) {
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byte b1 = (byte) ((random[j] & 0xf0) >> 4);
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byte b2 = (byte) (random[j] & 0x0f);
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if (b1 < 10)
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buffer.append((char) ('0' + b1));
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else
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buffer.append((char) ('A' + (b1 - 10)));
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if (b2 < 10)
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buffer.append((char) ('0' + b2));
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else
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buffer.append((char) ('A' + (b2 - 10)));
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resultLenBytes++;
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}
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}
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if (route != null && route.length() > 0) {
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buffer.append('.').append(route);
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} else {
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String jvmRoute = getJvmRoute();
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if (jvmRoute != null && jvmRoute.length() > 0) {
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buffer.append('.').append(jvmRoute);
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}
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}
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return buffer.toString();
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}
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}
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