src/acl/RequestHeaderStrategy.h

   1
   2 /*
   3  *
   4  * SQUID Web Proxy Cache          http://www.squid-cache.org/
   5  * ----------------------------------------------------------
   6  *
   7  *  Squid is the result of efforts by numerous individuals from
   8  *  the Internet community; see the CONTRIBUTORS file for full
   9  *  details.   Many organizations have provided support for Squid's
  10  *  development; see the SPONSORS file for full details.  Squid is
  11  *  Copyrighted (C) 2001 by the Regents of the University of
  12  *  California; see the COPYRIGHT file for full details.  Squid
  13  *  incorporates software developed and/or copyrighted by other
  14  *  sources; see the CREDITS file for full details.
  15  *
  16  *  This program is free software; you can redistribute it and/or modify
  17  *  it under the terms of the GNU General Public License as published by
  18  *  the Free Software Foundation; either version 2 of the License, or
  19  *  (at your option) any later version.
  20  *
  21  *  This program is distributed in the hope that it will be useful,
  22  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  *  GNU General Public License for more details.
  25  *
  26  *  You should have received a copy of the GNU General Public License
  27  *  along with this program; if not, write to the Free Software
  28  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
  29  *
  30  *
  31  * Copyright (c) 2003, Robert Collins <robertc@squid-cache.org>
  32  */
  33
  34 #ifndef SQUID_ACLREQUESTHEADERSTRATEGY_H
  35 #define SQUID_ACLREQUESTHEADERSTRATEGY_H
  36 #include "acl/Acl.h"
  37 #include "acl/Data.h"
  38 #include "acl/Strategy.h"
  39 #include "HttpRequest.h"
  40 #include "acl/FilledChecklist.h"
  41
  42 template <http_hdr_type header>
  43
  44 class ACLRequestHeaderStrategy : public ACLStrategy<char const *>
  45 {
  46
  47 public:
  48     virtual int match (ACLData<char const *> * &, ACLFilledChecklist *);
  49     virtual bool requiresRequest() const {return true;}
  50
  51     static ACLRequestHeaderStrategy *Instance();
  52     /* Not implemented to prevent copies of the instance. */
  53     /* Not private to prevent brain dead g+++ warnings about
  54      * private constructors with no friends */
  55     ACLRequestHeaderStrategy(ACLRequestHeaderStrategy const &);
  56
  57 private:
  58     static ACLRequestHeaderStrategy *Instance_;
  59     ACLRequestHeaderStrategy() {}
  60
  61     ACLRequestHeaderStrategy&operator=(ACLRequestHeaderStrategy const &);
  62 };
  63
  64 template <http_hdr_type header>
  65 int
  66 ACLRequestHeaderStrategy<header>::match (ACLData<char const *> * &data, ACLFilledChecklist *checklist)
  67 {
  68     char const *theHeader = checklist->request->header.getStr(header);
  69
  70     if (NULL == theHeader)
  71         return 0;
  72
  73     return data->match(theHeader);
  74 }
  75
  76 template <http_hdr_type header>
  77 ACLRequestHeaderStrategy<header> *
  78 ACLRequestHeaderStrategy<header>::Instance()
  79 {
  80     if (!Instance_)
  81         Instance_ = new ACLRequestHeaderStrategy<header>;
  82
  83     return Instance_;
  84 }
  85
  86 template <http_hdr_type header>
  87 ACLRequestHeaderStrategy<header> * ACLRequestHeaderStrategy<header>::Instance_ = NULL;
  88
  89 #endif /* SQUID_REQUESTHEADERSTRATEGY_H */