src/acl/ReplyHeaderStrategy.h

   1 /*
   2  * Copyright (C) 1996-2014 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_ACLREPLYHEADERSTRATEGY_H
  10 #define SQUID_ACLREPLYHEADERSTRATEGY_H
  11
  12 class ACLChecklist;
  13
  14 #include "acl/Acl.h"
  15 #include "acl/Data.h"
  16 #include "acl/FilledChecklist.h"
  17 #include "acl/Strategy.h"
  18 #include "HttpReply.h"
  19
  20 template <http_hdr_type header>
  21 class ACLReplyHeaderStrategy : public ACLStrategy<char const *>
  22 {
  23
  24 public:
  25     virtual int match (ACLData<char const *> * &, ACLFilledChecklist *, ACLFlags &);
  26     virtual bool requiresReply() const {return true;}
  27
  28     static ACLReplyHeaderStrategy *Instance();
  29     /* Not implemented to prevent copies of the instance. */
  30     /* Not private to prevent brain dead g+++ warnings about
  31      * private constructors with no friends */
  32     ACLReplyHeaderStrategy(ACLReplyHeaderStrategy const &);
  33
  34 private:
  35     static ACLReplyHeaderStrategy *Instance_;
  36     ACLReplyHeaderStrategy() {}
  37
  38     ACLReplyHeaderStrategy&operator=(ACLReplyHeaderStrategy const &);
  39 };
  40
  41 template <http_hdr_type header>
  42 int
  43 ACLReplyHeaderStrategy<header>::match (ACLData<char const *> * &data, ACLFilledChecklist *checklist, ACLFlags &)
  44 {
  45     char const *theHeader = checklist->reply->header.getStr(header);
  46
  47     if (NULL == theHeader)
  48         return 0;
  49
  50     return data->match(theHeader);
  51 }
  52
  53 template <http_hdr_type header>
  54 ACLReplyHeaderStrategy<header> *
  55 ACLReplyHeaderStrategy<header>::Instance()
  56 {
  57     if (!Instance_)
  58         Instance_ = new ACLReplyHeaderStrategy<header>;
  59
  60     return Instance_;
  61 }
  62
  63 template <http_hdr_type header>
  64 ACLReplyHeaderStrategy<header> * ACLReplyHeaderStrategy<header>::Instance_ = NULL;
  65
  66 #endif /* SQUID_REPLYHEADERSTRATEGY_H */
  67