JSON ++

JSON++ is a header only JSON Parser for C++. You can read from a file and it will automagically parse it. You can also write an object to a file or parse a JSON string directly. This allows for saving data as JSON which can then be used by Node.js or other javascript runtimes.

How To Use

To use it extract the files from the include folder into your own location / include folder.

To use in your program include the JSON.hpp File

EXAMPLE:

#include <iostream>
#include "include/Json.hpp"

int main(void) {
  JSONObject obj = JSON::parse("{\"key\": \"value\"}");

  std::cout << obj["key"].getString() << std::endl;

  return 0;
}

Methods on JSON Class

There are also some more methods and things you can do with it. Here are some methods with the JSON class.

void writeToFile(std::string filepath, std::string data, int spacing = 0); // Validates JSON String and writes it to a file
void writeToFile(std::string filepath, JSONObject obj, int spacing = 0); // Write a JSONObject to a file

JSONObject JSON::readFromFile(std::string filepath); // Read JSON from a filepath (ex: data.json) returns JSONObject
JSONObject JSON::parse(std::string data); // Parses a JSON string
std::string JSON::stringify(JSONObject obj, int spacing = 0); // Stringify a JSON Object

Access JSONObject Data

You can use subscripts on the object to access different values in the object. Example:

JSONObject x = JSON::readFromFile(std::string);
x["hello"] = "world";

// To get a value use .getTYPE();
std::cout << x["hello"].getString();

There are many methods to get the value. These should be used on the subscript.

std::string getString();
int getInt();
double getDouble();
bool getBoolean();

Object to String

If you want to convert a JSONObject into a string then you can use the std::string JSON::stringify(JSONObject) function.

EXAMPLE:

#include <iostream>
#include "include/Json.hpp"

int main(void) {
  // Read JSONObject from a json file
  JSONObject x = JSON::readFromFile("./tests/test.json");

  // Stringify a JSONObject into a string
  std::string str = JSON::stringify(x, 2); // 2 = Spacing of JSON String
  std::cout << str << std::endl; // Log the Stringed JSON

  // Stringify a JSONObject into a file
  JSON::writeToFile("./tests/test.json", x, 2); // 2 = Spacing of JSON String

  return 0;
}

There are some limitations right now, like you cannot create JSON Arrays or set a key to an array. Only basic values can be set.

That's All