看Web.xml：
<filter>
<filter-name>cuba_filter</filter-name>
<filter-class>com.haulmont.cuba.web.sys.CubaHttpFilter</filter-class>
<async-supported>true</async-supported>
</filter>
<filter-mapping>
<filter-name>cuba_filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
所以所有http请求都会过的