src/acl/ReplyHeaderStrategy.h

   1 /*
   2  * $Id$
   3  *
   4  *
   5  * SQUID Web Proxy Cache          http://www.squid-cache.org/
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   8  *  Squid is the result of efforts by numerous individuals from
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  10  *  details.   Many organizations have provided support for Squid's
  11  *  development; see the SPONSORS file for full details.  Squid is
  12  *  Copyrighted (C) 2001 by the Regents of the University of
  13  *  California; see the COPYRIGHT file for full details.  Squid
  14  *  incorporates software developed and/or copyrighted by other
  15  *  sources; see the CREDITS file for full details.
  16  *
  17  *  This program is free software; you can redistribute it and/or modify
  18  *  it under the terms of the GNU General Public License as published by
  19  *  the Free Software Foundation; either version 2 of the License, or
  20  *  (at your option) any later version.
  21  *
  22  *  This program is distributed in the hope that it will be useful,
  23  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  *  GNU General Public License for more details.
  26  *
  27  *  You should have received a copy of the GNU General Public License
  28  *  along with this program; if not, write to the Free Software
  29  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  30  *
  31  *
  32  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  33  */
  34 #ifndef SQUID_ACLREPLYHEADERSTRATEGY_H
  35 #define SQUID_ACLREPLYHEADERSTRATEGY_H
  36
  37 class ACLChecklist;
  38
  39 #include "acl/Acl.h"
  40 #include "acl/Data.h"
  41 #include "acl/Strategy.h"
  42 #include "acl/FilledChecklist.h"
  43 #include "HttpReply.h"
  44
  45 template <http_hdr_type header>
  46 class ACLReplyHeaderStrategy : public ACLStrategy<char const *>
  47 {
  48
  49 public:
  50     virtual int match (ACLData<char const *> * &, ACLFilledChecklist *);
  51     virtual bool requiresReply() const {return true;}
  52
  53     static ACLReplyHeaderStrategy *Instance();
  54     /* Not implemented to prevent copies of the instance. */
  55     /* Not private to prevent brain dead g+++ warnings about
  56      * private constructors with no friends */
  57     ACLReplyHeaderStrategy(ACLReplyHeaderStrategy const &);
  58
  59 private:
  60     static ACLReplyHeaderStrategy *Instance_;
  61     ACLReplyHeaderStrategy() {}
  62
  63     ACLReplyHeaderStrategy&operator=(ACLReplyHeaderStrategy const &);
  64 };
  65
  66 template <http_hdr_type header>
  67 int
  68 ACLReplyHeaderStrategy<header>::match (ACLData<char const *> * &data, ACLFilledChecklist *checklist)
  69 {
  70     char const *theHeader = checklist->reply->header.getStr(header);
  71
  72     if (NULL == theHeader)
  73         return 0;
  74
  75     return data->match(theHeader);
  76 }
  77
  78 template <http_hdr_type header>
  79 ACLReplyHeaderStrategy<header> *
  80 ACLReplyHeaderStrategy<header>::Instance()
  81 {
  82     if (!Instance_)
  83         Instance_ = new ACLReplyHeaderStrategy<header>;
  84
  85     return Instance_;
  86 }
  87
  88 template <http_hdr_type header>
  89 ACLReplyHeaderStrategy<header> * ACLReplyHeaderStrategy<header>::Instance_ = NULL;
  90
  91 #endif /* SQUID_REPLYHEADERSTRATEGY_H */