granicus.if.org Git - icinga2/blob - lib/livestatus/attributefilter.cpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2015 Icinga Development Team (http://www.icinga.org)    *
   4  *                                                                            *
   5  * This program is free software; you can redistribute it and/or              *
   6  * modify it under the terms of the GNU General Public License                *
   7  * as published by the Free Software Foundation; either version 2             *
   8  * of the License, or (at your option) any later version.                     *
   9  *                                                                            *
  10  * This program is distributed in the hope that it will be useful,            *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
  15  * You should have received a copy of the GNU General Public License          *
  16  * along with this program; if not, write to the Free Software Foundation     *
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19
  20 #include "livestatus/attributefilter.hpp"
  21 #include "base/convert.hpp"
  22 #include "base/array.hpp"
  23 #include "base/objectlock.hpp"
  24 #include "base/logger.hpp"
  25 #include <boost/foreach.hpp>
  26 #include <boost/regex.hpp>
  27 #include <boost/algorithm/string/predicate.hpp>
  28
  29 using namespace icinga;
  30
  31 AttributeFilter::AttributeFilter(const String& column, const String& op, const String& operand)
  32         : m_Column(column), m_Operator(op), m_Operand(operand)
  33 { }
  34
  35 bool AttributeFilter::Apply(const Table::Ptr& table, const Value& row)
  36 {
  37         Column column = table->GetColumn(m_Column);
  38
  39         Value value = column.ExtractValue(row);
  40
  41         if (value.IsObjectType<Array>()) {
  42                 Array::Ptr array = value;
  43
  44                 if (m_Operator == ">=" || m_Operator == "<") {
  45                         bool negate = (m_Operator == "<");
  46
  47                         ObjectLock olock(array);
  48                         BOOST_FOREACH(const String& item, array) {
  49                                 if (item == m_Operand)
  50                                         return !negate; /* Item found in list. */
  51                         }
  52
  53                         return negate; /* Item not found in list. */
  54                 } else if (m_Operator == "=") {
  55                         return (array->GetLength() == 0);
  56                 } else {
  57                         BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid operator for column '" + m_Column + "': " + m_Operator + " (expected '>=' or '=')."));
  58                 }
  59         } else {
  60                 if (m_Operator == "=") {
  61                         if (value.GetType() == ValueNumber || value.GetType() == ValueBoolean)
  62                                 return (static_cast<double>(value) == Convert::ToDouble(m_Operand));
  63                         else
  64                                 return (static_cast<String>(value) == m_Operand);
  65                 } else if (m_Operator == "~") {
  66                         bool ret;
  67                         try {
  68                                 boost::regex expr(m_Operand.GetData());
  69                                 String operand = value;
  70                                 boost::smatch what;
  71                                 ret = boost::regex_search(operand.GetData(), what, expr);
  72                         } catch (boost::exception&) {
  73                                 Log(LogWarning, "AttributeFilter")
  74                                     << "Regex '" << m_Operand << " " << m_Operator << " " << value << "' error.";
  75                                 ret = false;
  76                         }
  77
  78                         //Log(LogDebug, "LivestatusListener/AttributeFilter")
  79                         //    << "Attribute filter '" << m_Operand + " " << m_Operator << " "
  80                         //    << value << "' " << (ret ? "matches" : "doesn't match") << ".";
  81
  82                         return ret;
  83                 } else if (m_Operator == "=~") {
  84                         bool ret;
  85                         try {
  86                                 String operand = value;
  87                                 ret = boost::iequals(operand, m_Operand.GetData());
  88                         } catch (boost::exception&) {
  89                                 Log(LogWarning, "AttributeFilter")
  90                                     << "Case-insensitive equality '" << m_Operand << " " << m_Operator << " " << value << "' error.";
  91                                 ret = false;
  92                         }
  93
  94                         return ret;
  95                 } else if (m_Operator == "~~") {
  96                         bool ret;
  97                         try {
  98                                 boost::regex expr(m_Operand.GetData(), boost::regex::icase);
  99                                 String operand = value;
 100                                 boost::smatch what;
 101                                 ret = boost::regex_search(operand.GetData(), what, expr);
 102                         } catch (boost::exception&) {
 103                                 Log(LogWarning, "AttributeFilter")
 104                                     << "Regex '" << m_Operand << " " << m_Operator << " " << value << "' error.";
 105                                 ret = false;
 106                         }
 107
 108                         //Log(LogDebug, "LivestatusListener/AttributeFilter")
 109                         //    << "Attribute filter '" << m_Operand << " " << m_Operator << " "
 110                         //    << value << "' " << (ret ? "matches" : "doesn't match") << ".";
 111
 112                         return ret;
 113                 } else if (m_Operator == "<") {
 114                         if (value.GetType() == ValueNumber)
 115                                 return (static_cast<double>(value) < Convert::ToDouble(m_Operand));
 116                         else
 117                                 return (static_cast<String>(value) < m_Operand);
 118                 } else if (m_Operator == ">") {
 119                         if (value.GetType() == ValueNumber)
 120                                 return (static_cast<double>(value) > Convert::ToDouble(m_Operand));
 121                         else
 122                                 return (static_cast<String>(value) > m_Operand);
 123                 } else if (m_Operator == "<=") {
 124                         if (value.GetType() == ValueNumber)
 125                                 return (static_cast<double>(value) <= Convert::ToDouble(m_Operand));
 126                         else
 127                                 return (static_cast<String>(value) <= m_Operand);
 128                 } else if (m_Operator == ">=") {
 129                         if (value.GetType() == ValueNumber)
 130                                 return (static_cast<double>(value) >= Convert::ToDouble(m_Operand));
 131                         else
 132                                 return (static_cast<String>(value) >= m_Operand);
 133                 } else {
 134                         BOOST_THROW_EXCEPTION(std::invalid_argument("Unknown operator for column '" + m_Column + "': " + m_Operator));
 135                 }
 136         }
 137
 138         return false;
 139 }