src/acl/HttpHeaderData.cc

   1 /*
   2  * Copyright (C) 1996-2016 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 "base/RegexPattern.h"
  17 #include "ConfigParser.h"
  18 #include "Debug.h"
  19 #include "HttpHeaderTools.h"
  20 #include "sbuf/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(Http::HdrType::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 != Http::HdrType::BAD_HDR) {
  46         if (!hdr->has(hdrId))
  47             return false;
  48         value = hdr->getStrOrList(hdrId);
  49     } else {
  50         if (!hdr->getByNameIfPresent(hdrName, 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 #if __cplusplus >= 201103L
  64     sl.splice(sl.end(), regex_rule->dump());
  65 #else
  66     // temp is needed until c++11 move-constructor
  67     SBufList temp = regex_rule->dump();
  68     sl.splice(sl.end(), temp);
  69 #endif
  70     return sl;
  71 }
  72
  73 void
  74 ACLHTTPHeaderData::parse()
  75 {
  76     char* t = ConfigParser::strtokFile();
  77     assert (t != NULL);
  78     hdrName = t;
  79     hdrId = Http::HeaderLookupTable.lookup(hdrName).id;
  80     regex_rule->parse();
  81 }
  82
  83 bool
  84 ACLHTTPHeaderData::empty() const
  85 {
  86     return (hdrId == Http::HdrType::BAD_HDR && hdrName.isEmpty()) || regex_rule->empty();
  87 }
  88
  89 ACLData<HttpHeader*> *
  90 ACLHTTPHeaderData::clone() const
  91 {
  92     /* Header's don't clone yet. */
  93     ACLHTTPHeaderData * result = new ACLHTTPHeaderData;
  94     result->regex_rule = regex_rule->clone();
  95     result->hdrId = hdrId;
  96     result->hdrName = hdrName;
  97     return result;
  98 }
  99