src/acl/HttpHeaderData.cc

   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 /* DEBUG: section 28    Access Control */
  10
  11 #include "squid.h"
  12 #include "acl/Acl.h"
  13 #include "acl/Checklist.h"
  14 #include "acl/HttpHeaderData.h"
  15 #include "acl/RegexData.h"
  16 #include "cache_cf.h"
  17 #include "ConfigParser.h"
  18 #include "Debug.h"
  19 #include "HttpHeaderTools.h"
  20 #include "SBuf.h"
  21
  22 /* Construct an ACLHTTPHeaderData that uses an ACLRegex rule with the value of the
  23  * selected header from a given request.
  24  *
  25  * TODO: This can be generalised by making the type of the regex_rule into a
  26  * template parameter - so that we can use different rules types in future.
  27  */
  28 ACLHTTPHeaderData::ACLHTTPHeaderData() : hdrId(HDR_BAD_HDR), regex_rule(new ACLRegexData)
  29 {}
  30
  31 ACLHTTPHeaderData::~ACLHTTPHeaderData()
  32 {
  33     delete regex_rule;
  34 }
  35
  36 bool
  37 ACLHTTPHeaderData::match(HttpHeader* hdr)
  38 {
  39     if (hdr == NULL)
  40         return false;
  41
  42     debugs(28, 3, "aclHeaderData::match: checking '" << hdrName << "'");
  43
  44     String value;
  45     if (hdrId != HDR_BAD_HDR) {
  46         if (!hdr->has(hdrId))
  47             return false;
  48         value = hdr->getStrOrList(hdrId);
  49     } else {
  50         if (!hdr->getByNameIfPresent(hdrName.termedBuf(), value))
  51             return false;
  52     }
  53
  54     SBuf cvalue(value);
  55     return regex_rule->match(cvalue.c_str());
  56 }
  57
  58 SBufList
  59 ACLHTTPHeaderData::dump() const
  60 {
  61     SBufList sl;
  62     sl.push_back(SBuf(hdrName));
  63     // temp is needed until c++11 move-constructor
  64     SBufList temp = regex_rule->dump();
  65     sl.splice(sl.end(), temp);
  66     return sl;
  67 }
  68
  69 void
  70 ACLHTTPHeaderData::parse()
  71 {
  72     char* t = strtokFile();
  73     assert (t != NULL);
  74     hdrName = t;
  75     hdrId = httpHeaderIdByNameDef(hdrName.rawBuf(), hdrName.size());
  76     regex_rule->parse();
  77 }
  78
  79 bool
  80 ACLHTTPHeaderData::empty() const
  81 {
  82     return (hdrId == HDR_BAD_HDR && hdrName.size()==0) || regex_rule->empty();
  83 }
  84
  85 ACLData<HttpHeader*> *
  86 ACLHTTPHeaderData::clone() const
  87 {
  88     /* Header's don't clone yet. */
  89     ACLHTTPHeaderData * result = new ACLHTTPHeaderData;
  90     result->regex_rule = regex_rule->clone();
  91     result->hdrId = hdrId;
  92     result->hdrName = hdrName;
  93     return result;
  94 }