org.apache.catalina.filters

## Class HttpHeaderSecurityFilter

- java.lang.Object
- - org.apache.catalina.filters.FilterBase
  - - org.apache.catalina.filters.HttpHeaderSecurityFilter

- All Implemented Interfaces:
    Filter

      public class HttpHeaderSecurityFilter
      extends FilterBase

  Provides a single configuration point for security measures that required the addition of one or more HTTP headers to the response.

- - ### Field Summary

    - ### Fields inherited from class org.apache.catalina.filters.FilterBase

      `sm`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `HttpHeaderSecurityFilter()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `doFilter(ServletRequest request, ServletResponse response, FilterChain chain)` The `doFilter` method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain.
    `String` | `getAntiClickJackingOption()`
    `String` | `getAntiClickJackingUri()`
    `int` | `getHstsMaxAgeSeconds()`
    `protected Log` | `getLogger()`
    `void` | `init(FilterConfig filterConfig)` Iterates over the configuration parameters and either logs a warning, or throws an exception for any parameter that does not have a matching setter in this filter.
    `boolean` | `isAntiClickJackingEnabled()`
    `boolean` | `isBlockContentTypeSniffingEnabled()`
    `protected boolean` | `isConfigProblemFatal()` Determines if an exception when calling a setter or an unknown configuration attribute triggers the failure of the this filter which in turn will prevent the web application from starting.
    `boolean` | `isHstsEnabled()`
    `boolean` | `isHstsIncludeSubDomains()`
    `boolean` | `isHstsPreload()`
    `boolean` | `isXssProtectionEnabled()`
    `void` | `setAntiClickJackingEnabled(boolean antiClickJackingEnabled)`
    `void` | `setAntiClickJackingOption(String antiClickJackingOption)`
    `void` | `setAntiClickJackingUri(String antiClickJackingUri)`
    `void` | `setBlockContentTypeSniffingEnabled(boolean blockContentTypeSniffingEnabled)`
    `void` | `setHstsEnabled(boolean hstsEnabled)`
    `void` | `setHstsIncludeSubDomains(boolean hstsIncludeSubDomains)`
    `void` | `setHstsMaxAgeSeconds(int hstsMaxAgeSeconds)`
    `void` | `setHstsPreload(boolean hstsPreload)`
    `void` | `setXssProtectionEnabled(boolean xssProtectionEnabled)`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

    - ### Methods inherited from interface javax.servlet.Filter

      `destroy`

- - ### Constructor Detail

    - #### HttpHeaderSecurityFilter

          public HttpHeaderSecurityFilter()

  - ### Method Detail

    - #### init

          public void init(FilterConfig filterConfig)
                    throws ServletException

      Description copied from class: `FilterBase`
      Iterates over the configuration parameters and either logs a warning, or throws an exception for any parameter that does not have a matching setter in this filter.
      Specified by:
        `init` in interface `Filter`
      Overrides:
        `init` in class `FilterBase`
      Parameters:
        `filterConfig` - The configuration information associated with the filter instance being initialised
      Throws:
        `ServletException` - if `FilterBase.isConfigProblemFatal()` returns `true` and a configured parameter does not have a matching setter

    - #### doFilter

          public void doFilter(ServletRequest request,
                               ServletResponse response,
                               FilterChain chain)
                        throws IOException,
                               ServletException

      Description copied from interface: `javax.servlet.Filter`
      The `doFilter` method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client request for a resource at the end of the chain. The FilterChain passed in to this method allows the Filter to pass on the request and response to the next entity in the chain.

      A typical implementation of this method would follow the following pattern:-
      1. Examine the request
      2. Optionally wrap the request object with a custom implementation to filter content or headers for input filtering
      3. Optionally wrap the response object with a custom implementation to filter content or headers for output filtering
      4. a) Either invoke the next entity in the chain using the FilterChain object (`chain.doFilter()`),
      4. b) or not pass on the request/response pair to the next entity in the filter chain to block the request processing
      5. Directly set headers on the response after invocation of the next entity in the filter chain.

      Parameters:
        `request` - The request to process
        `response` - The response associated with the request
        `chain` - Provides access to the next filter in the chain for this filter to pass the request and response to for further processing
      Throws:
        `IOException` - if an I/O error occurs during this filter's processing of the request
        `ServletException` - if the processing fails for any other reason

    - #### getLogger

          protected Log getLogger()

      Specified by:
        `getLogger` in class `FilterBase`

    - #### isConfigProblemFatal

          protected boolean isConfigProblemFatal()

      Description copied from class: `FilterBase`
      Determines if an exception when calling a setter or an unknown configuration attribute triggers the failure of the this filter which in turn will prevent the web application from starting.
      Overrides:
        `isConfigProblemFatal` in class `FilterBase`
      Returns:
        `true` if a problem should trigger the failure of this filter, else `false`

    - #### isHstsEnabled

          public boolean isHstsEnabled()

    - #### setHstsEnabled

          public void setHstsEnabled(boolean hstsEnabled)

    - #### getHstsMaxAgeSeconds

          public int getHstsMaxAgeSeconds()

    - #### setHstsMaxAgeSeconds

          public void setHstsMaxAgeSeconds(int hstsMaxAgeSeconds)

    - #### isHstsIncludeSubDomains

          public boolean isHstsIncludeSubDomains()

    - #### setHstsIncludeSubDomains

          public void setHstsIncludeSubDomains(boolean hstsIncludeSubDomains)

    - #### isHstsPreload

          public boolean isHstsPreload()

    - #### setHstsPreload

          public void setHstsPreload(boolean hstsPreload)

    - #### isAntiClickJackingEnabled

          public boolean isAntiClickJackingEnabled()

    - #### setAntiClickJackingEnabled

          public void setAntiClickJackingEnabled(boolean antiClickJackingEnabled)

    - #### getAntiClickJackingOption

          public String getAntiClickJackingOption()

    - #### setAntiClickJackingOption

          public void setAntiClickJackingOption(String antiClickJackingOption)

    - #### getAntiClickJackingUri

          public String getAntiClickJackingUri()

    - #### isBlockContentTypeSniffingEnabled

          public boolean isBlockContentTypeSniffingEnabled()

    - #### setBlockContentTypeSniffingEnabled

          public void setBlockContentTypeSniffingEnabled(boolean blockContentTypeSniffingEnabled)

    - #### setAntiClickJackingUri

          public void setAntiClickJackingUri(String antiClickJackingUri)

    - #### isXssProtectionEnabled

          public boolean isXssProtectionEnabled()

    - #### setXssProtectionEnabled

          public void setXssProtectionEnabled(boolean xssProtectionEnabled)

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