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/* 
 * by Francesco Chemolli 
 * This is a roxen module. Copyright © 1999 - 2004, Roxen IS. 
 * 
 * Notice: this might look ugly, it's been designed to be split into 
 * a "library" program plus a tiny imlpementation module 
 */ 
 
constant cvs_version="$Id: throttling_bytype.pike,v 1.10 2004/06/30 16:59:32 mast Exp $"; 
 
#include <module.h> 
inherit "throttlelib"; 
 
string filter_type="(by type)"; 
string rules_doc= 
#"Throttling rules. One rule per line, whose format is:<br> 
<tt>type-glob modifier [fix]</tt><br> 
<tt>type-glob</tt> is matched on the Content Type header. 
(i.e. <tt>image/gif</tt> or <tt>text/html</tt>).<p> 
<i>modifier</i> is the altering rule. There are six possible rule types:<br> 
<tt>+{number}</tt> adds <i>number</i> bytes/sec to the request<br> 
<tt>-{number}</tt> subtracts <i>number</i> bytes/sec to the request<br> 
<tt>*{number}</tt> multiplies the bandwidth assigned to the request 
  by <i>number</i> (a floating-point number)<br> 
<tt>/{number}</tt> divides the bandwidth assigned to the request 
  by <i>number</i> (a floating-point number)<br> 
<tt>={number}</tt> assigns the request <i>number</i> bytes/sec of  
  bandwidth<br> 
<tt>nothrottle</tt> asserts that the request is not to be throttled. 
  It implies using <tt>fix</tt>.<p> 
  The optional keyword <tt>fix</tt> will make the assigned bandwidth final. 
The entries are scanned in order, and processing is stopped as soon as  
a match is found.<p> 
Lines starting with <tt>#</tt> are considered comments."; 
 
 
#ifdef THROTTLING_DEBUG 
#undef THROTTLING_DEBUG 
#define THROTTLING_DEBUG(X) werror("Throttling: "+X+"\n") 
#else 
#define THROTTLING_DEBUG(X) 
#endif 
 
constant module_type = MODULE_FILTER; 
constant module_name = "Throttling: throttle by type"; 
constant module_doc  = "This module will alter the throttling definitions by content type"; 
constant module_unique = 1; 
 
array find_rule (mapping res, object id,  
                 array(string) rulenames, mapping rules) { 
  if (!res) return 0; 
  return low_find_rule(res->type, rulenames, rules); 
}