C++读取调用接口返回的json数据

1、引入头文件

#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/json_parser.hpp>

2、读取json数据方法，http请求中的chunked传输数据会返回数据的长度，在最后一个chunked中其头部长度定为0

//读取json文件{"name":"zhangsan","age":25}
template<class T>
void readJson(const string& data, T& t) {
    if (strcmp(data.c_str(), "") != 0) {
        std::size_t start = data.find_first_of("{");
        std::size_t end = data.find_last_of("}");
        string res = data.substr(start, end - start + 1);
        std::stringstream ss(res);
        boost::property_tree::ptree pt;
        boost::property_tree::json_parser::read_json(ss, pt);
        t = pt.get<T>("name");
        std::cout << "result:" << t << std::endl;
    }
}

void postCustom(const string& url, const string& token) {
    boost::asio::io_service io;
    HttpBoost c(io);
    c.post(url, token);
    io.run();
    string p=0;
    readJson(c.getResponse(),p);
    std::cout << c.getResponse() << std::endl;
}

 参考 https://www.jianshu.com/p/acb76b784230