src/acl/RequestHeaderStrategy.h

   1
   2 /*
   3  * $Id$
   4  *
   5  *
   6  * SQUID Web Proxy Cache          http://www.squid-cache.org/
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   9  *  Squid is the result of efforts by numerous individuals from
  10  *  the Internet community; see the CONTRIBUTORS file for full
  11  *  details.   Many organizations have provided support for Squid's
  12  *  development; see the SPONSORS file for full details.  Squid is
  13  *  Copyrighted (C) 2001 by the Regents of the University of
  14  *  California; see the COPYRIGHT file for full details.  Squid
  15  *  incorporates software developed and/or copyrighted by other
  16  *  sources; see the CREDITS file for full details.
  17  *
  18  *  This program is free software; you can redistribute it and/or modify
  19  *  it under the terms of the GNU General Public License as published by
  20  *  the Free Software Foundation; either version 2 of the License, or
  21  *  (at your option) any later version.
  22  *
  23  *  This program is distributed in the hope that it will be useful,
  24  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  *  GNU General Public License for more details.
  27  *
  28  *  You should have received a copy of the GNU General Public License
  29  *  along with this program; if not, write to the Free Software
  30  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  31  *
  32  *
  33  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  34  */
  35
  36 #ifndef SQUID_ACLREQUESTHEADERSTRATEGY_H
  37 #define SQUID_ACLREQUESTHEADERSTRATEGY_H
  38 #include "acl/Acl.h"
  39 #include "acl/Data.h"
  40 #include "acl/Strategy.h"
  41 #include "HttpRequest.h"
  42 #include "acl/FilledChecklist.h"
  43
  44 template <http_hdr_type header>
  45
  46 class ACLRequestHeaderStrategy : public ACLStrategy<char const *>
  47 {
  48
  49 public:
  50     virtual int match (ACLData<char const *> * &, ACLFilledChecklist *);
  51     virtual bool requiresRequest() const {return true;}
  52
  53     static ACLRequestHeaderStrategy *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     ACLRequestHeaderStrategy(ACLRequestHeaderStrategy const &);
  58
  59 private:
  60     static ACLRequestHeaderStrategy *Instance_;
  61     ACLRequestHeaderStrategy() {}
  62
  63     ACLRequestHeaderStrategy&operator=(ACLRequestHeaderStrategy const &);
  64 };
  65
  66 template <http_hdr_type header>
  67 int
  68 ACLRequestHeaderStrategy<header>::match (ACLData<char const *> * &data, ACLFilledChecklist *checklist)
  69 {
  70     char const *theHeader = checklist->request->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 ACLRequestHeaderStrategy<header> *
  80 ACLRequestHeaderStrategy<header>::Instance()
  81 {
  82     if (!Instance_)
  83         Instance_ = new ACLRequestHeaderStrategy<header>;
  84
  85     return Instance_;
  86 }
  87
  88 template <http_hdr_type header>
  89 ACLRequestHeaderStrategy<header> * ACLRequestHeaderStrategy<header>::Instance_ = NULL;
  90
  91 #endif /* SQUID_REQUESTHEADERSTRATEGY_H */