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Exposing SOAP Services With Apache’s ProxyPass

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I have recently had cause to proxy a J2EE CXF service through an apache 2.2 instance, and thought it would be nice to share my findings. (This was all done on a Debian system.)

First of all, the mod_proxy pieces have to be enabled using a2enmod proxy.

A fragment has to be added with the proxying bits and some limitation:

     Order allow,deny
     Allow from all


ProxyPass /EXPOSEDURL http://SERVER:PORT/URL
ProxyPassReverse /EXPOSEDURL http://SERVER:PORT/URL

Reloading apache configuration should enable the proxy properly. The only other possible issue is that in addition to the WSDL URL, you’re going to have to specify a “proxy” URL, which is just the service URL without ?wsdl at the end of it. A fragment of PHP’s SoapClient would look like this:

$url = "http://server.domain:8180/services/MySoapService?wsdl";
$sc = new SoapClient( file_get_contents($url), array(
          'login' => $my_username // optional for basic auth
        , 'password' => $my_password // optional for basic auth
        , 'compression' => SOAP_COMPRESSION_ACCEPT | SOAP_COMPRESSION_GZIP
        , 'location' => str_replace('?wsdl', '', $url) // force this to work through proxies
));

The magic in that last segment was the “location” parameter, as it specifies the proxy. Good luck!

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