I have a Config file with following contents:
{
"ip": "127.0.0.1",
"heartbeat": "1",
"ssl": "False",
"log_severity": "debug",
"port":"9999"
}
I have used JsonCpp for reading the content of above config file. Reading the content of Config File works fine, but writing the content in the Config File fails. I have following code:
#include <json/json.h>
#include <json/writer.h>
#include <iostream>
#include <fstream>
int main()
{
Json::Value root; // will contains the root value after parsing.
Json::Reader reader;
Json::StyledStreamWriter writer;
std::ifstream test("C://SomeFolder//lpa.config");
bool parsingSuccessful = reader.parse( test, root );
if ( !parsingSuccessful )
{
// report to the user the failure and their locations in the document.
std::cout << "Failed to parse configuration: "<< reader.getFormattedErrorMessages();
}
std::cout << root["heartbeat"] << std::endl;
std::cout << root << std::endl;
root["heartbeat"] = "60";
std::ofstream test1("C://SomeFolder//lpa.config");
writer.write(test1,root);
std::cout << root << std::endl;
return 0;
}
The code prints the correct output in console, however the Config File is empty when this code executes. How do I make this code work?
All you need to do is explicitly closing the input stream
test.close(); // ADD THIS LINE
std::ofstream test1("C://LogPointAgent//lpa.config");
writer.write(test1,root);
std::cout << root << std::endl;
return 0;