Package org.python.util
Class PyFilter
java.lang.Object
org.python.util.PyFilter
- All Implemented Interfaces:
javax.servlet.Filter
Enables you to write Jython modules that inherit from
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>
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Field Summary
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Constructor Summary
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Method Summary
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Field Details
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FILTER_PATH_PARAM
- See Also:
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Constructor Details
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PyFilter
public PyFilter()
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Method Details
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doFilter
public void doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain) throws IOException, javax.servlet.ServletException - Specified by:
doFilter
in interfacejavax.servlet.Filter
- Throws:
IOException
javax.servlet.ServletException
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init
public void init(javax.servlet.FilterConfig config) throws javax.servlet.ServletException - Specified by:
init
in interfacejavax.servlet.Filter
- Throws:
javax.servlet.ServletException
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destroy
public void destroy()- Specified by:
destroy
in interfacejavax.servlet.Filter
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