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|
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE document [
<!ENTITY project SYSTEM "project.xml">
]>
<document url="iis.html">
&project;
<copyright>
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.
</copyright>
<properties>
<title>IIS HowTo</title>
<author email="hgomez@apache.org">Henri Gomez</author>
<author email="shachor@il.ibm.com">Gal Shachor</author>
<author email="yoavs@apache.org">Yoav Shapira</author>
<date>$Date: 2010-03-15 16:40:37 +0100 (Mon, 15 Mar 2010) $</date>
</properties>
<body>
<section name="Introduction">
<p>
This document explains how to set up IIS to cooperate with Tomcat.
</p>
<p>
Normally IIS can not execute Servlets and Java Server Pages (JSPs),
configuring IIS to use the JK ISAPI redirector plugin will let IIS send servlet and
JSP requests to Tomcat (and this way, serve them to clients).
</p>
<p>
It is recommended that you also read the
<a href="../generic_howto/workers.html">Workers HowTo</a> document
to learn how to setup the working entities between your web server and Tomcat Engines.
For more detailed configuration information consult the Reference Guide for
<a href="../reference/workers.html">workers.properties</a>,
<a href="../reference/uriworkermap.html">uriworkermap</a>
and <a href="../reference/iis.html">IIS</a>.
</p>
<subsection name="Document Conventions and Assumptions">
<p>
${tomcat_home} is the root directory of tomcat.
Your Tomcat installation should have the following subdirectories:
<ul>
<li>
${tomcat_home}\conf - Where you can place various configuration files
</li>
<li>
${tomcat_home}\webapps - Containing example applications
</li>
<li>
${tomcat_home}\bin - Where you place web server plugins
</li>
</ul>
</p>
<p>
In all the examples in this document ${tomcat_home} will be <b>c:\tomcat</b>.
A worker is defined to be a tomcat process that accepts work from the IIS server.
</p>
</subsection>
<subsection name="Supported Configuration">
<p>
The IIS-Tomcat redirector was developed and tested on:
<ul>
<li>
WinNT4.0-i386 SP4/SP5/SP6a (should be able to work with other service packs), Win2K and WinXP and Win98
</li>
<li>
IIS4.0 and PWS4.0 (numerous people have working IIS 5 and IIS 6 configurations)
</li>
<li>
Tomcat 3.2 and later, Tomcat 4.x, Tomcat 5 and 5.5 and Tomcat 6
</li>
</ul>
</p>
<p>
The redirector uses <b>ajp12</b> and <b>ajp13</b> to send requests to the Tomcat containers. There is also an option to use Tomcat in process,
more about the in-process mode can be found in the in process howto.
</p>
</subsection>
<subsection name="IIS 5 and 6 Notes">
<p>
There are extra steps you need to take for configuring Tomcat with IIS 5 and 6. Please see the appropriate links from
<a href="http://wiki.apache.org/tomcat/Tomcat/Links">Tomcat Useful Links</a>.
</p>
</subsection>
<subsection name="IIS 7 notes">
<p>
There is a known bug in IIS that may result in incomplete log messages. See <a
href="https://issues.apache.org/bugzilla/show_bug.cgi?id=45769">bug 45769</a>
for further details.
</p>
</subsection>
<subsection name="Who support ajp protocols ?">
<p>
The ajp12 protocol is only available in Tomcat 3.2.x and 3.3.x.
</p>
<p>
The <b>ajp12</b> has been <b>deprecated</b> with Tomcat 3.3.x and you should use instead
<b>ajp13</b> which is the only ajp protocol known by Tomcat 4.x, 5 and 5.5 and Tomcat 6.
</p>
<p>
Of course Tomcat 3.2.x and 3.3.x also support ajp13 protocol.
</p>
<p>
Others servlet engines such as <b>jetty</b> have support for ajp13 protocol
</p>
</subsection>
<subsection name="How does it work ?">
<p>
<ol>
<li>
The IIS-Tomcat redirector is an IIS plugin (filter + extension), IIS load the redirector plugin and calls its
filter function for each in-coming request.
</li>
<li>
The filter then tests the request URL against a list of URI-paths held inside uriworkermap.properties,
If the current request matches one of the entries in the list of URI-paths,
the filter transfers the request to the extension.
</li>
<li>
The extension collects the request parameters and forwards them to the appropriate worker using the defined
protocol like <b>ajp13</b>.
</li>
<li>
The extension collects the response from the worker and returns it to the browser.
</li>
</ol>
</p>
</subsection>
</section>
<section name="Installation">
<p>
A pre-built version of the ISAPI redirector server plugin, isapi_redirect.dll, is available under
the win32/i386 directory of tomcat-connectors distribution.
For those using Netscape as your browser, try downloading a zip version of the file, if available.
There can be problems using Netscape to download DLL files.
You can also build a copy locally from the source present in tomcat-connectors distribution.
The Tomcat redirector requires three entities:
<ul>
<li>
<b>isapi_redirect.dll</b> - The IIS server plugin, either obtain a pre-built DLL or build it yourself (see the build section).
</li>
<li>
<b><a href="../reference/workers.html">workers.properties</a></b> - A file that describes the host(s) and port(s) used by the workers (Tomcat processes).
A sample workers.properties can be found under the conf directory.
</li>
<li>
<b><a href="../reference/uriworkermap.html">uriworkermap.properties</a></b> - A file that maps URL-Path patterns to workers.
A sample uriworkermap.properties can be found under the conf directory as well.
</li>
</ul>
</p>
<p>
The installation includes the following parts:
<ul>
<li>
Configuring the ISAPI redirector with a default /examples context and checking that you can serve servlets with IIS.
</li>
<li>
Adding more contexts to the configuration.
</li>
</ul>
</p>
</section>
<section name="Configuring the ISAPI Redirector">
<p>
In this document I will assume that isapi_redirect.dll is placed in
<b>c:\tomcat\bin\win32\i386\isapi_redirect.dll</b> and
that the properties files which you created are in <b>c:\tomcat\conf</b>.
</p>
<p>
<ol>
<li>
In the registry, create a new registry key named
<b>"HKEY_LOCAL_MACHINE\SOFTWARE\Apache Software Foundation\Jakarta Isapi Redirector\1.0"</b>
</li>
<li>
Add a string value with the name <b>extension_uri</b> and a value of <b>/jakarta/isapi_redirect.dll</b>
</li>
<li>
Add a string value with the name <b>log_file</b> and a value pointing to where you want your
log file to be (for example <b>c:\tomcat\logs\isapi.log</b>).
</li>
<li>
Add a string value with the name <b>log_level</b> and a value for your log level
(can be debug, info, error or emerg).
</li>
<li>
Add a string value with the name <b>worker_file</b> and a value which is the full path
to your workers.properties file (for example <b>c:\tomcat\conf\workers.properties</b>)
</li>
<li>
Add a string value with the name <b>worker_mount_file</b> and a value which is the full path
to your uriworkermap.properties file (for example <b>c:\tomcat\conf\uriworkermap.properties</b>)
</li>
<li>
Using the IIS management console, add a new virtual directory to your IIS/PWS web site.
The name of the virtual directory must be jakarta.
Its physical path should be the directory where you placed isapi_redirect.dll
(in our example it is c:\tomcat\bin\win32\i386).
While creating this new virtual directory assign it with execute access.
</li>
<li>
Using the IIS management console, add isapi_redirect.dll as a filter in your IIS/PWS web site.
The name of the filter should reflect its task (I use the name tomcat),
its executable must be our c:\tomcat\bin\win32\i386\isapi_redirect.dll.
For PWS, you'll need to use regedit and add/edit the <b>"Filter DLLs"</b> key under
<b>HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\W3SVC\Parameters</b>.
This key contains a "," separated list of dlls (full paths) -
you need to insert the full path to isapi_redirect.dll.
</li>
<li>
If you're using IIS 6.0 you must also do the following:
<br />
Using the IIS management console, add the Jakarta Isapi Redirector to the Web
Service Extensions.
<ol>
<li>Right-click on Web Service Extensions and choose Add a new Web Service
Extension.</li>
<li>Enter tomcat for the Extension Name.</li>
<li>Add the isapi_redirect.dll to the required files.</li>
<li>Check the Set extension status to Allowed.</li>
<li>Click on OK.</li>
</ol>
</li>
<li>
Restart IIS (stop + start the IIS service), make sure that the tomcat filter is marked with a green up-pointing arrow.
Under Win98 you may need to <b>cd WINDOWS\SYSTEM\inetsrv</b> and type PWS /stop
( the DLL and log files are locked - even if you click the stop button,
PWS will still keep the DLLs in memory. ). Type pws to start it again.
</li>
</ol>
</p>
<p>
That's all, you should now start Tomcat and ask IIS to serve you the /examples context.
Try <a href="http://localhost/examples/jsp/index.html">http://localhost/examples/jsp/index.html</a> for example and
execute some of the JSP examples.
</p>
<p>
If this does not work successfully, refer to the Troubleshooting section below for help on correcting the problem.
</p>
<subsection name="Adding additional Contexts">
<p>
The examples context is useful for verifying your installation,
but you will also need to add your own contexts. Adding a new context requires two operations:
</p>
<p>
<ol>
<li>
Adding the context to Tomcat (I am not going to talk about this).
</li>
<li>
Adding the context to the ISAPI redirector.
</li>
</ol>
</p>
<p>
Adding a context to the ISAPI redirector is simple, all you need to do is to edit
your uriworkermap.properties and to add a line that looks like:
</p>
<source>
/context/*=worker_name
</source>
<p>
Workers and their name are defined in workers.properties, by default workers.properties comes
with a single pre-configured worker named <b>"defworker"</b> so you can use it.
As an example, if you want to add a context named "shop", the line that you should add to
uriworkermap.properties will be:
</p>
<source>
/shop/*=defworker
</source>
After saving uriworkermap.properties restart IIS and it will serve the new context.
<p>
The above should be all you need for IIS to pass through to Tomcat any request for any URI which corresponds
to a Tomcat context (webapp).
</p>
</subsection>
<subsection name="Advanced Context Configuration">
<p>
If your webiste is very busy (more than 100 requests/second, or more than 100 simultaneous client connections),
it might sometimes be desirable to have IIS serve static content (html, gif, jpeg etc.) directly,
even if these files are part of a context served by Tomcat. Allowing IIS to serve such files directly may
avoid the small overhead consisting of passing the request to Tomcat via the redirector, and may free up
Tomcat somewhat, by using it only to process requests that only Tomcat can handle (e.g. requests to JSP pages and java servlets).
</p>
<p>
For example, consider the html and gif files in the examples context : you could serve these files directly
with IIS; there is no need to serve them from the Tomcat process.
</p>
<warn>However, you should be very careful when you implement the following configuration style, because by doing so you are
in fact providing a "back-door" to IIS, and allowing it to serve files out of a Tomcat context without Tomcat's knowledge,
thus bypassing any security
restrictions which Tomcat itself and the Tomcat context (webapp) may place on those files.</warn>
<p>
Making IIS serve static files that are part of the Tomcat contexts requires the following:
<ol>
<li>
Configuring IIS to know about the Tomcat contexts
</li>
<li>
Configuring the redirector to leave the static files for IIS
</li>
</ol>
</p>
<p>
Adding a Tomcat context to IIS requires the addition of a new IIS virtual directory that covers the Tomcat context.
For example adding a /example IIS virtual directory that covers the c:\tomcat\webapps\examples directory.
</p>
<p>
Configuring the redirector is somewhat harder, you will need to specify the exact
URL-Path pattern(s) which you want Tomcat to handle (usually only JSP files and servlets).
This requires a change to the uriworkermap.properties :
<source>
For the examples context it requires to replace the following line
/examples/*=defworker
with the following two lines
/examples/*.jsp=defworker
/examples/servlet/*=defworker
</source>
</p>
<p>
As you can see the second configuration is more explicit, it actually instruct the redirector
to redirect only requests to resources under /examples/servlet/ and resources under /examples/
whose name ends with .jsp.
</p>
<p>
You can even be more explicit and provide lines such as:
<source>
/example/servletname=defworker
</source>
</p>
<p>
that instructs the redirector to redirect all requests whose URL-path matches the leading string "/example/servletname"
to the worker named defworker.
</p>
</subsection>
<subsection name="Protecting the content of your Tomcat contexts">
<p>Once again, be aware that by allowing IIS to access the content of your Tomcat context directly, you are
potentially bypassing Tomcat's protection of that content. You should thus make sure to protect this content
at the IIS level if needed, by using the corresponding IIS management console functions.
</p>
<p>
In particular, each servlet application (context) has a special directory named WEB-INF,
which contains sensitive configuration data and Java classes, and which should always be kept hidden from web users.
Using the IIS management console it is possible to protect the WEB-INF directory from user access, but considering that
this is a general requirement, and considering that it is easy to forget to implement this protection
at the IIS level, the redirector plugin does it automatically for you, and it will reject any request
which contains WEB-INF in its URL-path.
</p>
</subsection>
<subsection name="Advanced Worker Configuration">
<p>
Sometimes you may want to serve different contexts with different Tomcat processes
(for example to spread the load among different machines).
To achieve such a goal you will need to define several workers and assign each context to its own worker.
</p>
<p>
Defining additional workers is done in the workers.properties file. This file includes two types of entries:
</p>
<p>
<source>
# An entry that lists all the workers defined
worker.list=worker1, worker2
# Entries that define the host and port associated with each of these workers
worker.worker1.host=localhost
worker.worker1.port=8009
worker.worker1.type=ajp13
worker.worker2.host=otherhost
worker.worker2.port=8009
worker.worker2.type=ajp13
</source>
</p>
<p>
The above example defined two workers, now we can use these workers to serve two different contexts
each with its own worker:
<source>
example uriworkermap.properties fragment
/examples/*=worker1
/webpages/*=worker2
</source>
</p>
<p>
As you can see the <b>examples</b> context is served by <b>worker1</b> while the
<b>webpages</b> context is served by <b>worker2</b>.
</p>
<p>
More information on using and configuring workers in the <a href="../generic_howto/workers.html">Workers HowTo</a>
and in the <a href="../reference/workers.html">worker.properties configuration reference</a>.
</p>
</subsection>
</section>
<section name="Building ISAPI redirector">
<p>
The redirector was developed using Visual C++ Ver.6.0, so having this environment is a prerequisite if you want
to perform a custom build. You should also have the IIS developer SDK.
The steps that you need to take are:
<ul>
<li>
Change directory to the isapi plugins source directory.
</li>
<li>
Make the source with MSDEV
</li>
</ul>
<screen>
<note>Change directory to the isapi plugins source directory</note>
<typedos>cd c:\home\apache\jk\iis</typedos>
<note>Build the sources using MSDEV</note>
<typedos>MSDEV isapi.dsp /MAKE ALL</typedos>
</screen>
</p>
<p>
If msdev is not in your path, enter the full path to msdev.exe.
This will build both release and debug versions of the redirector plugin.
An alternative will be to open the isapi workspace file (isapi.dsw) in msdev and
build it using the build menu.
</p>
</section>
<section name="Troubleshooting">
<p>
It is easy to have the ISAPI redirector not work the first time you try to install it.
</p>
<p>
If this happens to you, here are some steps to follow to try to correct the problem.
</p>
<p>
These steps aren't guaranteed to cover all possible problems,
but they should help find the typical mistakes.
</p>
<p>
If you make any corrections during these steps, restart the IIS service as described above in the last step
of the installation, then retry the step.
</p>
<p>To enable error tracking, make sure web site activity is being logged.
For PWS 4.0 make sure "Save Web Site Activity Log" is checked in the Advanced Options of the Personal Web Manager.
</p>
<p>
Note: These steps assume your <b>worker_mount_file</b> setting points to an unmodified copy of the
<b>uriworkermap.properties</b> file.<br/>
Results may be misleading if <b>worker_mount_file</b> points to a modified <b>uriworkermap.properties</b>
or the <b>uriworkermap.properties-auto</b> file.<br/>
It is also assumed that the <b>"/examples" context</b> works correctly if you access Tomcat directly.
</p>
<subsection name="Win98">
<p>
Start the IIS service and Tomcat.
</p>
<p>
Check for the presence of the ISAPI redirector log file you specified in the log_file setting.
If not found, verify the following:
</p>
<ul>
<li>
Check the "Filter DLLs" setting in the "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\W3SVC\Parameters"
key and make sure the path is correct.
</li>
<li>
Check the spelling of the "HKEY_LOCAL_MACHINE\SOFTWARE\Apache Software Foundation\Jakarta Isapi Redirector\1.0" key.
Case isn't important, but an incorrect letter will prevent the isapi_redirect.dll from finding its registry settings.
</li>
<li>
Check the log_file setting for typos, name and data. Also insure the directory in which the log file will appear already exists.
</li>
If the above are set correctly, the ISAPI redirector should be able to create the log file.
</ul>
<p>
Invoke the URL <a href="http://localhost/examples/jsp/index.html">http://localhost/examples/jsp/index.html</a>
in your browser.
Case is important in Tomcat. The characters following "localhost" in the URL must be lower case.
If the page fails to appear, stop the IIS service (required to view the IIS log file).
Then examine the last line in the IIS log file in found in SYSTEM/LogFiles/W3SVC1 :
</p>
<p>
If the last line contains:
</p>
<source>
GET "/examples/jsp/index.html HTTP/1.1" 404
</source>
<p>
then the ISAPI redirector is not recognising that it should be handling requests for the "/examples" context.
Check the following:
</p>
<ul>
<li>
Check the extension_uri name for typos.
</li>
<li>
Check the worker_file setting for typos, name and data.
</li>
<li>
Check the worker_mount_file setting typos, name and data.
</li>
If these are set correctly, the ISAPI redirector should recognise that it should handle requests for the "/examples" context.
</ul>
<p>If the last line contains something like:
</p>
<source>
GET "/jakarta/isapi_redirect.dll HTTP1.1"
</source>
<p>
then the ISAPI redirector is recognising that it should handle the request,
but is not successful at getting Tomcat to service the request.
</p>
<p>
You should check the HTTP error code following GET "/..." :
</p>
<source>
Error 404
GET "/..." 404
</source>
<ul>
<li>
Make sure you entered the URL correctly.
</li>
<li>
Make sure the virtual directory created was called "jakarta".
It should display in Personal Web Manager as "/jakarta" (without the quotes).
</li>
<li>
Make sure the extension_uri data begins with "/jakarta/" (without the quotes).
</li>
</ul>
<source>
Error 500
GET "/..." 500
</source>
<ul>
<li>
Make sure that "isapi_redirect.dll" follows "/jakarta/" in the extension_uri setting.
</li>
<li>
Check the workers.properties file and make sure the port setting for worker.ajp12.port is the same as the port specified in the server.xml for the "Apache AJP12 support".
</li>
</ul>
<source>
Error 200 or 403
GET "/..." 200
GET "/..." 403
</source>
<ul>
<li>
Make sure you have checked Execute Access
for the jakarta virtual directory in the Advanced Options of the Personal Web Manager.
</li>
</ul>
<p>
If the above settings are correct, the index.html page should appear in your browser.
You should also be able to click the Execute links to execute the JSP examples.
</p>
</subsection>
<subsection name="WinNT/Win2K/WinXP">
<p>
Start the World Wide Web Publishing Service and Tomcat.
</p>
<p>
Check for the presence of the ISAPI redirector log file you specified in the log_file setting.
If not found, check the following:
</p>
<ul>
<li>
Check the "executable" you set for the filter in the IIS Management Console and make sure the path is correct.
</li>
<li>Check the spelling of the "HKEY_LOCAL_MACHINE\SOFTWARE\Apache Software Foundation\Jakarta Isapi Redirector\1.0" key.
Case isn't important, but an incorrect letter will prevent the isapi_redirect.dll from finding its registry settings.
</li>
<li>
Check the log_file setting for typos, name and data. Also insure the directory in which the log file will appear already exists.
</li>
If the above are set correctly, the ISAPI redirector should be able to create the log file.
</ul>
<p>
Check the tomcat filter you added and make sure its status shows a green upward-pointing arrow.
If not, check the following:
</p>
<ul>
<li>
Check the worker_file setting for typos, name and data.
</li>
<li>
Check the worker_mount_file setting typos, name and data.
</li>
If the above are set correctly, the green upward-pointing arrow should appear, even if the other settings are wrong.
</ul>
<p>
Invoke the URL <a href="http://localhost/examples/jsp/index.html">http://localhost/examples/jsp/index.html</a>
in your browser. Case is important in Tomcat. The characters following "localhost" in the URL must be lower case.
If the page fails to appear, examine the last line in the IIS server log file in found in SYSTEM32/LogFiles/W3SVC1.
</p>
<p>
The last line should contain something like: GET "/jakarta/isapi_redirect.dll HTTP1.1",
which indicates the ISAPI redirector is recognising that it should handle the request.
</p>
<p>
You should check the HTTP error code following GET "/..." :
</p>
<source>
Error 404
GET "/..." 404
</source>
<ul>
<li>
Make sure you entered the URL correctly.
</li>
</ul>
<source>
Error 500
GET "/..." 500
</source>
<ul>
<li>
Make sure the virtual directory created was called "jakarta".
</li>
<li>
Make sure that the extension_uri setting is correct.
</li>
<li>
Check the workers.properties file and make sure the port setting for worker.ajp12.port is the same as the port specified in the server.xml for the "Apache AJP12 support".
</li>
</ul>
<source>
Error 200 or 403
GET "/..." 200
GET "/..." 403
</source>
<ul>
<li>
Make sure you have checked Execute Access for the jakarta virtual directory in the
Advanced Options of the Personal Web Manager.
</li>
</ul>
<p>
If the above settings are correct, the index.html page should appear in your browser.
You should also be able to click the Execute links to execute the JSP examples.
</p>
</subsection>
</section>
</body>
</document>
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