public class PyFilter
extends java.lang.Object
implements javax.servlet.Filter
javax.servlet.Filter, and to
insert them in your servlet container's filter chain, like any Java Filter.
Example:
/WEB-INF/filters/HeaderFilter.py:
from javax.servlet import Filter
# Module must contain a class with the same name as the module
# which in turn must implement javax.servlet.Filter
class HeaderFilter (Filter):
def init(self, config):
self.header = config.getInitParameter('header')
def doFilter(self, request, response, chain):
response.setHeader(self.header, "Yup")
chain.doFilter(request, response)
web.xml:
<!-- Initialize the Jython runtime -->
<listener>
<listener-class>org.python.util.PyServletInitializer</listener-class>
<load-on-startup>1</load-on-startup>
</listener>
<!-- Declare a uniquely-named PyFilter -->
<filter>
<filter-name>HeaderFilter</filter-name>
<filter-class>org.python.util.PyFilter</filter-class>
<!-- The special param __filter__ gives the context-relative path to the Jython source file -->
<init-param>
<param-name>__filter__</param-name>
<param-value>/WEB-INF/pyfilter/HeaderFilter.py</param-value>
</init-param>
<!-- Other params are passed on the the Jython filter -->
<init-param>
<param-name>header</param-name>
<param-value>X-LookMaNoJava</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>HeaderFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
| Modifier and Type | Field and Description |
|---|---|
static java.lang.String |
FILTER_PATH_PARAM |
| Constructor and Description |
|---|
PyFilter() |
| Modifier and Type | Method and Description |
|---|---|
void |
destroy() |
void |
doFilter(javax.servlet.ServletRequest request,
javax.servlet.ServletResponse response,
javax.servlet.FilterChain chain) |
void |
init(javax.servlet.FilterConfig config) |
public static final java.lang.String FILTER_PATH_PARAM
public void doFilter(javax.servlet.ServletRequest request,
javax.servlet.ServletResponse response,
javax.servlet.FilterChain chain)
throws java.io.IOException,
javax.servlet.ServletException
doFilter in interface javax.servlet.Filterjava.io.IOExceptionjavax.servlet.ServletExceptionpublic void init(javax.servlet.FilterConfig config)
throws javax.servlet.ServletException
init in interface javax.servlet.Filterjavax.servlet.ServletExceptionpublic void destroy()
destroy in interface javax.servlet.Filter