<?xml version="1.0" encoding="UTF-8"?>
<!--
  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.
-->
<!DOCTYPE document [
  <!ENTITY project SYSTEM "project.xml">
]>
<document url="apr.html">

    &project;

  <properties>
    <title>Apache Portable Runtime (APR) based Native library for Tomcat</title>
    <author>Remy Maucherat</author>
  </properties>

<body>

<section name="Table of Contents">
<toc/>
</section>

  <section name="Introduction">

  <p>
      Tomcat can use the <a href="https://apr.apache.org/">Apache Portable Runtime</a> to
      provide an OpenSSL based TLS implementation for the HTTP connectors.
  </p>

  <p>
      These features allows making Tomcat a general purpose webserver, will enable much better
      integration with other native web technologies, and overall make Java much more viable as
      a full fledged webserver platform rather than simply a backend focused technology.
  </p>

  </section>

  <section name="Installation">

    <p>
      APR support requires three main native components to be installed:
    </p>
    <ul>
      <li>APR library</li>
      <li>JNI wrappers for APR used by Tomcat (libtcnative)</li>
      <li>OpenSSL libraries</li>
    </ul>

    <subsection name="Windows">

    <p>
      Windows binaries are provided for tcnative-1, which is a statically compiled .dll which includes
      OpenSSL and APR. It can be downloaded from <a href="https://tomcat.apache.org/download-native.cgi">here</a>
      as 32bit or AMD x86-64 binaries.
      In security conscious production environments, it is recommended to use separate shared dlls
      for OpenSSL, APR, and libtcnative-1, and update them as needed according to security bulletins.
      Windows OpenSSL binaries are linked from the <a href="https://www.openssl.org">Official OpenSSL
      website</a> (see related/binaries).
    </p>

    </subsection>

    <subsection name="Linux">

    <p>
      Most Linux distributions will ship packages for APR and OpenSSL. The JNI wrapper (libtcnative) will
      then have to be compiled. It depends on APR, OpenSSL, and the Java headers.
    </p>

    <p>
      Requirements:
    </p>
    <ul>
      <li>APR 1.2+ development headers (libapr1-dev package)</li>
      <li>OpenSSL 1.0.2+ development headers (libssl-dev package)</li>
      <li>JNI headers from Java compatible JDK 1.4+</li>
      <li>GNU development environment (gcc, make)</li>
    </ul>

    <p>
      The wrapper library sources are located in the Tomcat binary bundle, in the
      <code>bin/tomcat-native.tar.gz</code> archive.
      Once the build environment is installed and the source archive is extracted, the wrapper library
      can be compiled using (from the folder containing the configure script):
    </p>
    <source>./configure &amp;&amp; make &amp;&amp; make install</source>

    </subsection>

  </section>

  <section name="APR Components">

  <p>
    Once the libraries are properly installed and available to Java (if loading fails, the library path
    will be displayed), the Tomcat connectors will automatically use APR.
  </p>

  </section>

  <section name="APR Lifecycle Listener Configuration">
    <p>See <a href="config/listeners.html#APR_Lifecycle_Listener_-_org.apache.catalina.core.AprLifecycleListener">the
    listener configuration</a>.</p>
  </section>

</body>
</document>
