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     try {
  50       return std::stoi(val.string_value());
  51     } catch (std::out_of_range&) {
  52       throw JsonException("Value for key '" + string(key) + "' is out of range");
  53     }
  54   } else {
  55     // TODO: check if value really isn't present
  56     return default_value;
  57   }
  58 }
  59
  60 double doubleFromJson(const Json container, const std::string& key)
  61 {
  62   auto val = container[key];
  63   if (val.is_number()) {
  64     return val.number_value();
  65   } else if (val.is_string()) {
  66     try {
  67       return std::stod(val.string_value());
  68     } catch (std::out_of_range&) {
  69       throw JsonException("Value for key '" + string(key) + "' is out of range");
  70     }
  71   } else {
  72     throw JsonException("Key '" + string(key) + "' not an Integer or not present");
  73   }
  74 }
  75
  76 double doubleFromJson(const Json container, const std::string& key, const double default_value)
  77 {
  78   auto val = container[key];
  79   if (val.is_number()) {
  80     return val.number_value();
  81   } else if (val.is_string()) {
  82     return std::stod(val.string_value());
  83   } else {
  84     // TODO: check if value really isn't present
  85     return default_value;
  86   }
  87 }
  88
  89 string stringFromJson(const Json container, const std::string &key)
  90 {
  91   const Json val = container[key];
  92   if (val.is_string()) {
  93     return val.string_value();
  94   } else {
  95     throw JsonException("Key '" + string(key) + "' not present or not a String");
  96   }
  97 }
  98
  99 bool boolFromJson(const Json container, const std::string& key)
 100 {
 101   auto val = container[key];
 102   if (val.is_bool()) {
 103     return val.bool_value();
 104   }
 105   throw JsonException("Key '" + string(key) + "' not present or not a Bool");
 106 }
 107
 108 bool boolFromJson(const Json container, const std::string& key, const bool default_value)
 109 {
 110   auto val = container[key];
 111   if (val.is_bool()) {
 112     return val.bool_value();
 113   }
 114   return default_value;
 115 }