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<h1>Part 6b: mod_proxy and Lenya</h1>
<div id="front-matter">
<div id="minitoc-area">
<ul class="minitoc">
<li>
<a href="#live_environment">Live environment</a>
</li>
<li>
<a href="#modifying_the_publication_proxy_configuration">Modifying the publication proxy configuration</a>
</li>
<li>
<a href="#this_concludes_the_test_of_the_emergency_broadcast_system">This concludes the test of the emergency broadcast system</a>
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<p>One thing to note about the previous article: the last statement is indeed correct
if you don't make any changes to the publication.xconf file in the "config"
directory of your default publication. However, if you update it according to
the
<a href="http://wiki.apache.org/lenya/HowToModProxy">
HowToModProxy</a> document, after login, you'll be taken back to a non-SSL
connection for the rest of your editing.</p>
<p>OK, now that the Authoring environment has been setup, we need to finish the Live
server setup.</p>
<a name="N10018"></a><a name="live_environment"></a>
<h2 class="h3">Live environment</h2>
<div class="section">
<p>The live environment, at least for this setup, is remarkably similar. Since
we're using the same Apache instance but a different IP address, just setup
another NameVirtualHost directive with the new IP address. We'll assume
that for every publication in Lenya, that will be a directory under our
domain name. So, say we have the following publications in our pubs
directory:</p>
<pre class="code">
default -&gt; Default Publication
weblog -&gt; Lenya Weblog</pre>
<p>Then we want to access them this way:</p>
<pre class="code">
http://www.client.com/default/
http://www.client.com/weblog/</pre>
<p>In the end, our setup for the live server should look like this:</p>
<pre class="code">
NameVirtualHost 192.168.1.200:80
&lt;VirtualHost 192.168.1.200:80&gt;
ServerName www.client.com
ServerAlias www
ProxyRequests Off
RewriteEngine On
RewriteLog logs/www.client.com.rewrite.log
RewriteLogLevel 0
RewriteRule ^/([^/\.]+)$ $1/ [R]
RewriteRule ^/([^/\.]+)/$ $1/index.html [R]
RewriteRule ^/([^/\.]+)/live/(.*)$ $1/$2 [R,L]
# Rewrite for Lenya-wide resources (e.g. 404 page)
RewriteRule ^/lenya/(.*) http://www.client.com:8080/lenya/$1 [P]
RewriteRule ^/([^/\.]+)/(.*) http://www.client.com:8080/$1/live/$2 [P]
ProxyPassReverse / http://www.client.com:8080/
&lt;/VirtualHost&gt;
&lt;VirtualHost 192.168.1.200:443&gt;
ServerName www.client.com
ServerAlias www
ProxyRequests Off
RewriteEngine On
RewriteLog logs/ssl.www.client.com.rewrite.log
RewriteLogLevel 0
RewriteRule ^/([^/\.]+)$ $1/ [R]
RewriteRule ^/([^/\.]+)/$ $1/index.html [R]
RewriteRule ^/([^/\.]+)/live/(.*)$ $1/$2 [R,L]
# Rewrite for Lenya-wide resources (e.g. 404 page)
RewriteRule ^/lenya/(.*) http://www.client.com:8080/lenya/$1 [P]
RewriteRule ^/([^/\.]+)/(.*) http://%{SERVER_NAME}:8080/$1/live/$2 [P]
ProxyPassReverse / http://www.client.com:8080/
&lt;/VirtualHost&gt;
</pre>
<p>So, what's going on here? Well, to use the non-SSL virtualhost as an example,
we're simply matching for any directory and mapping it to it's live
counterpart. We add the rewrite for the 404 page (remember, this
installation is under the ROOT context, so some of the "lenya" directories
are missing) and then reverse proxy it to port 8080 as usual. Now, if you go to
http://www.client.com/default/, you get taken to the live site for the
default publication.</p>
<p>There are some things that aren't good about this. For one, it doesn't take
into account the root directory (i.e., http://www.client.com/). It will
be served by Apache in the DocumentRoot instead of through Lenya. That may be
what you're looking for, but my guess is that your publications won't
directly match to their URLs. No problems - just be more specific. If you
wanted to map the http://www.client.com/ URL to the default publication,
then just use this instead:</p>
<pre class="code">
RewriteRule ^/$ index.html [R]
RewriteRule ^/default/live/(.*)$ $1 [R,L]
RewriteRule ^/(.*) http://www.client.com:8080/default/live/$1 [P]
</pre>
<p>Then reverse proxy as always. In configurations we've used, we just list each
publication we have that maps to a URL, so we know for certain that we are matching
everything we want to.</p>
</div>
<a name="N1003F"></a><a name="modifying_the_publication_proxy_configuration"></a>
<h2 class="h3">Modifying the publication proxy configuration</h2>
<div class="section">
<p>There's one last thing that you'll want to do, and that's modifying the default
proxy settings in the publication's files itself so that you can switch between
SSL and non-SSL encrypted pages with ease. The start of the
<a href="http://wiki.apache.org/lenya/HowToModProxy">
HowToModProxy</a> document, as mentioned before, shows how to do this
really well. Using the
example above where the publications relate to their web address:</p>
<pre class="code">
&lt;proxy url="https://www.client.com/default" ssl="true" area="live"/&gt;
&lt;proxy url="http://www.client.com/default" ssl="false" area="live"/&gt;
&lt;proxy url="https://lenya.client.com/default" ssl="true" area="authoring"/&gt;
&lt;proxy url="http://lenya.client.com/default" ssl="false" area="authoring"/&gt;
</pre>
<p>WARNING! we haven't tried the above configuration because we don't have the
necessary resources to test it properly. Hopefully someone will test it and get
back to us on the results. According to the documentation on Lenya's website, it
should be correct.</p>
</div>
<a name="N10054"></a><a name="this_concludes_the_test_of_the_emergency_broadcast_system"></a>
<h2 class="h3">This concludes the test of the emergency broadcast system</h2>
<div class="section">
<p>Well, that's it. There's obviously more that you can play with when it comes to
mod_proxy and general URLs, but we hope this is a springboard for more ideas and a
place to gather more resources on the subject. If you're ever stuck on mod_proxy
in general, you can visit
<a href="http://httpd.apache.org/docs-2.0/mod/mod_proxy.html">
Apache's documentation</a> on the subject, and as always, a post to the
Lenya user <a href="../../../community/mailing-lists.html">mailing list</a> will most likely yield some answers.</p>
</div>
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