Runtime should support gzip for request

This is available in tomcat

<Connector port="8081" protocol="HTTP/1.1"
               connectionTimeout="20000"
               compression="on"
               compressionMinSize="2048"
               noCompressionUserAgents="gozilla, traviata"
               compressableMimeType="text/html,text/xml,text/javascript,text/css"
               redirectPort="8443" URIEncoding="UTF-8"/>

or in Apache HTTPD with a mod

There are some works in cocoon, but nothing seems finished (gzipxmlserializer ou gzippipelineprocessor)

Could also be in the servlet directly or using existing servlet filters (as http://sourceforge.net/projects/pjl-comp-filter/)

NOTE : gzip is faster in apache, maybe the gzip in the application should be stoppable, so the zipping is done by apache when available...