Apache Module mod_actions
Summary
    This module has two directives. The Action directive lets you run CGI
    scripts whenever a file of a certain type is requested. The
    Script directive lets
    you run CGI scripts whenever a particular method is used in a
    request. This makes it much easier to execute scripts that process
    files.

    This directive adds an action, which will activate
    cgi-script when action-type is triggered by the
    request.  The cgi-script is the URL-path to a resource
    that has been designated as a CGI script using ScriptAlias or AddHandler.  The
    action-type can be either a handler or a MIME content type. It
    sends the URL and file path of the requested document using the
    standard CGI PATH_INFO and PATH_TRANSLATED environment
    variables.
    Examples
      # Requests for files of a particular type:
      Action image/gif /cgi-bin/images.cgi
      
      # Files of a particular file extension
      AddHandler my-file-type .xyz
      Action my-file-type /cgi-bin/program.cgi
    
In the first example, requests for files with a MIME content
    type of image/gif will instead be handled by the
    specified cgi script /cgi-bin/images.cgi.
    In the second example, requests for files with a file extension of
    .xyz are handled instead by the specified cgi script 
    /cgi-bin/program.cgi.
See also
 

    This directive adds an action, which will activate
    cgi-script when a file is requested using the method of
    method. The cgi-script is the URL-path to a
    resource that has been designated as a CGI script using ScriptAlias or AddHandler.  The URL and
    file path of the requested document is sent using the standard CGI
    PATH_INFO and PATH_TRANSLATED environment variables.
    
      Any arbitrary method name may be used. Method names are
      case-sensitive, so Script PUT and
      Script put have two entirely different
      effects.
    
    Note that the Script command defines default actions only.
    If a CGI script is called, or some other resource that is
    capable of handling the requested method internally, it will do
    so. Also note that Script with a method of GET
    will only be called if there are query arguments present
    (e.g., foo.html?hi). Otherwise, the request will
    proceed normally.
    Examples
      # For <ISINDEX>-style searching
      Script GET /cgi-bin/search
      
      # A CGI PUT handler
      Script PUT /~bob/put.cgi