src/RefreshPattern.h

   1 /*
   2  * Copyright (C) 1996-2015 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #ifndef SQUID_REFRESHPATTERN_H_
  10 #define SQUID_REFRESHPATTERN_H_
  11
  12 #include "base/RegexPattern.h"
  13
  14 /// a representation of a refresh pattern.
  15 class RefreshPattern
  16 {
  17     MEMPROXY_CLASS(RefreshPattern);
  18
  19 public:
  20
  21     /*
  22      * Defaults:
  23      *      MIN     NONE
  24      *      PCT     20%
  25      *      MAX     3 days
  26      */
  27 #define REFRESH_DEFAULT_MAX static_cast<time_t>(259200)
  28
  29     RefreshPattern(const char *aPattern, const decltype(RegexPattern::flags) &reFlags) :
  30         pattern(reFlags, aPattern),
  31         min(0), pct(0.20), max(REFRESH_DEFAULT_MAX),
  32         next(NULL),
  33         max_stale(0)
  34     {
  35         memset(&flags, 0, sizeof(flags));
  36     }
  37
  38     ~RefreshPattern() {
  39         while (RefreshPattern *t = next) {
  40             next = t->next;
  41             t->next = nullptr;
  42             delete t;
  43         }
  44     }
  45     // ~RefreshPattern() default destructor is fine
  46
  47     RegexPattern pattern;
  48     time_t min;
  49     double pct;
  50     time_t max;
  51     RefreshPattern *next;
  52
  53     struct {
  54         bool refresh_ims;
  55         bool store_stale;
  56 #if USE_HTTP_VIOLATIONS
  57         bool override_expire;
  58         bool override_lastmod;
  59         bool reload_into_ims;
  60         bool ignore_reload;
  61         bool ignore_no_store;
  62         bool ignore_private;
  63 #endif
  64     } flags;
  65     int max_stale;
  66
  67     // statistics about how many matches this pattern has had
  68     mutable struct stats_ {
  69         stats_() : matchTests(0), matchCount(0) {}
  70
  71         uint64_t matchTests;
  72         uint64_t matchCount;
  73         // TODO: some stats to indicate how useful/less the flags are would be nice.
  74     } stats;
  75 };
  76
  77 #endif /* SQUID_REFRESHPATTERN_H_ */
  78