pdns/json.cc

   1 /*
   2  * This file is part of PowerDNS or dnsdist.
   3  * Copyright -- PowerDNS.COM B.V. and its contributors
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of version 2 of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * In addition, for the avoidance of any doubt, permission is granted to
  10  * link this program with OpenSSL and to (re)distribute the binaries
  11  * produced as the result of such linking.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22 #ifdef HAVE_CONFIG_H
  23 #include "config.h"
  24 #endif
  25 #include "json.hh"
  26 #include "namespaces.hh"
  27 #include "misc.hh"
  28
  29 using json11::Json;
  30
  31 int intFromJson(const Json container, const std::string& key)
  32 {
  33   auto val = container[key];
  34   if (val.is_number()) {
  35     return val.int_value();
  36   } else if (val.is_string()) {
  37     return std::stoi(val.string_value());
  38   } else {
  39     throw JsonException("Key '" + string(key) + "' not an Integer or not present");
  40   }
  41 }
  42
  43 int intFromJson(const Json container, const std::string& key, const int default_value)
  44 {
  45   auto val = container[key];
  46   if (val.is_number()) {
  47     return val.int_value();
  48   } else if (val.is_string()) {
  49     return std::stoi(val.string_value());
  50   } else {
  51     // TODO: check if value really isn't present
  52     return default_value;
  53   }
  54 }
  55
  56 double doubleFromJson(const Json container, const std::string& key)
  57 {
  58   auto val = container[key];
  59   if (val.is_number()) {
  60     return val.number_value();
  61   } else if (val.is_string()) {
  62     return std::stod(val.string_value());
  63   } else {
  64     throw JsonException("Key '" + string(key) + "' not an Integer or not present");
  65   }
  66 }
  67
  68 double doubleFromJson(const Json container, const std::string& key, const double default_value)
  69 {
  70   auto val = container[key];
  71   if (val.is_number()) {
  72     return val.number_value();
  73   } else if (val.is_string()) {
  74     return std::stod(val.string_value());
  75   } else {
  76     // TODO: check if value really isn't present
  77     return default_value;
  78   }
  79 }
  80
  81 string stringFromJson(const Json container, const std::string &key)
  82 {
  83   const Json val = container[key];
  84   if (val.is_string()) {
  85     return val.string_value();
  86   } else {
  87     throw JsonException("Key '" + string(key) + "' not present or not a String");
  88   }
  89 }
  90
  91 bool boolFromJson(const Json container, const std::string& key)
  92 {
  93   auto val = container[key];
  94   if (val.is_bool()) {
  95     return val.bool_value();
  96   }
  97   throw JsonException("Key '" + string(key) + "' not present or not a Bool");
  98 }
  99
 100 bool boolFromJson(const Json container, const std::string& key, const bool default_value)
 101 {
 102   auto val = container[key];
 103   if (val.is_bool()) {
 104     return val.bool_value();
 105   }
 106   return default_value;
 107 }