Package org.zkoss.web.util.resource

## Interface Filter

-     public interface Filter

  A filter is an object that performs filtering task on a request to `Extendlet`.
  Since:
    3.5.1
  Author:
    tomyeh

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `doFilter​(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, java.lang.String pi, FilterChain chain)` | Causes the next filter in the chain to be invoked, or if the calling filter is the last filter in the chain, causes the resource at the end of the chain to be invoked.
    `void` | `init​(FilterConfig config)` | Initializes the resource processor.

- - ### Method Detail

    - #### init

          void init​(FilterConfig config)

      Initializes the resource processor.

    - #### doFilter

          void doFilter​(javax.servlet.http.HttpServletRequest request,
                        javax.servlet.http.HttpServletResponse response,
                        java.lang.String pi,
                        FilterChain chain)
                 throws javax.servlet.ServletException,
                        java.io.IOException

      Causes the next filter in the chain to be invoked, or if the calling filter is the last filter in the chain, causes the resource at the end of the chain to be invoked.
      Parameters:
        `request` - the request (never null).
        `response` - the response (never null).
        `pi` - the path info that the request is targeting.
      Throws:
        `javax.servlet.ServletException`
        `java.io.IOException`