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

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2016 Icinga Development Team (https://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/regex.hpp>
  26 #include <boost/algorithm/string/predicate.hpp>
  27
  28 using namespace icinga;
  29
  30 AttributeFilter::AttributeFilter(const String& column, const String& op, const String& operand)
  31         : m_Column(column), m_Operator(op), m_Operand(operand)
  32 { }
  33
  34 bool AttributeFilter::Apply(const Table::Ptr& table, const Value& row)
  35 {
  36         Column column = table->GetColumn(m_Column);
  37
  38         Value value = column.ExtractValue(row);
  39
  40         if (value.IsObjectType<Array>()) {
  41                 Array::Ptr array = value;
  42
  43                 if (m_Operator == ">=" || m_Operator == "<") {
  44                         bool negate = (m_Operator == "<");
  45
  46                         ObjectLock olock(array);
  47                         for (const String& item : array) {
  48                                 if (item == m_Operand)
  49                                         return !negate; /* Item found in list. */
  50                         }
  51
  52                         return negate; /* Item not found in list. */
  53                 } else if (m_Operator == "=") {
  54                         return (array->GetLength() == 0);
  55                 } else {
  56                         BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid operator for column '" + m_Column + "': " + m_Operator + " (expected '>=' or '=')."));
  57                 }
  58         } else {
  59                 if (m_Operator == "=") {
  60                         if (value.GetType() == ValueNumber || value.GetType() == ValueBoolean)
  61                                 return (static_cast<double>(value) == Convert::ToDouble(m_Operand));
  62                         else
  63                                 return (static_cast<String>(value) == m_Operand);
  64                 } else if (m_Operator == "~") {
  65                         bool ret;
  66                         try {
  67                                 boost::regex expr(m_Operand.GetData());
  68                                 String operand = value;
  69                                 boost::smatch what;
  70                                 ret = boost::regex_search(operand.GetData(), what, expr);
  71                         } catch (boost::exception&) {
  72                                 Log(LogWarning, "AttributeFilter")
  73                                     << "Regex '" << m_Operand << " " << m_Operator << " " << value << "' error.";
  74                                 ret = false;
  75                         }
  76
  77                         //Log(LogDebug, "LivestatusListener/AttributeFilter")
  78                         //    << "Attribute filter '" << m_Operand + " " << m_Operator << " "
  79                         //    << value << "' " << (ret ? "matches" : "doesn't match") << ".";
  80
  81                         return ret;
  82                 } else if (m_Operator == "=~") {
  83                         bool ret;
  84                         try {
  85                                 String operand = value;
  86                                 ret = boost::iequals(operand, m_Operand.GetData());
  87                         } catch (boost::exception&) {
  88                                 Log(LogWarning, "AttributeFilter")
  89                                     << "Case-insensitive equality '" << m_Operand << " " << m_Operator << " " << value << "' error.";
  90                                 ret = false;
  91                         }
  92
  93                         return ret;
  94                 } else if (m_Operator == "~~") {
  95                         bool ret;
  96                         try {
  97                                 boost::regex expr(m_Operand.GetData(), boost::regex::icase);
  98                                 String operand = value;
  99                                 boost::smatch what;
 100                                 ret = boost::regex_search(operand.GetData(), what, expr);
 101                         } catch (boost::exception&) {
 102                                 Log(LogWarning, "AttributeFilter")
 103                                     << "Regex '" << m_Operand << " " << m_Operator << " " << value << "' error.";
 104                                 ret = false;
 105                         }
 106
 107                         //Log(LogDebug, "LivestatusListener/AttributeFilter")
 108                         //    << "Attribute filter '" << m_Operand << " " << m_Operator << " "
 109                         //    << value << "' " << (ret ? "matches" : "doesn't match") << ".";
 110
 111                         return ret;
 112                 } else if (m_Operator == "<") {
 113                         if (value.GetType() == ValueNumber)
 114                                 return (static_cast<double>(value) < Convert::ToDouble(m_Operand));
 115                         else
 116                                 return (static_cast<String>(value) < m_Operand);
 117                 } else if (m_Operator == ">") {
 118                         if (value.GetType() == ValueNumber)
 119                                 return (static_cast<double>(value) > Convert::ToDouble(m_Operand));
 120                         else
 121                                 return (static_cast<String>(value) > m_Operand);
 122                 } else if (m_Operator == "<=") {
 123                         if (value.GetType() == ValueNumber)
 124                                 return (static_cast<double>(value) <= Convert::ToDouble(m_Operand));
 125                         else
 126                                 return (static_cast<String>(value) <= m_Operand);
 127                 } else if (m_Operator == ">=") {
 128                         if (value.GetType() == ValueNumber)
 129                                 return (static_cast<double>(value) >= Convert::ToDouble(m_Operand));
 130                         else
 131                                 return (static_cast<String>(value) >= m_Operand);
 132                 } else {
 133                         BOOST_THROW_EXCEPTION(std::invalid_argument("Unknown operator for column '" + m_Column + "': " + m_Operator));
 134                 }
 135         }
 136
 137         return false;
 138 }