代码示例如下：

#include <iostream>
#include <curl/curl.h>
#include <string>
#include <json/json.h>

void CallingChainTracer::report(reportStruct& reportData)
{
    CURL *curl;
    CURLcode res;
    struct curl_slist *headers = NULL;
	// 构建上报的url
    const std::string url = "http://192.168.12.34:30660/call_chain/buried-points/trace/push";
	// 填充JSON结构体
    Json::Value root;
    root["trace_id"] = (std::string)span_->trace_id;
    root["workflow_id"] = (int)reportData.workflow_id;
    root["case_id"] = (int)reportData.case_id;
    root["source_span_id"] = (std::string)span_->source_span_id;
    root["device_name"] = (std::string)reportData.device_name;
    root["span_id"] = (std::string)span_->span_id;
    root["service_id"] = (std::string)span_->service_id;
    root["service_name"] = (std::string)reportData.service_name;
    root["method_id"] = (std::string)span_->method_id;
    root["method_name"] = (std::string)reportData.method_name;
    root["method_type"] = (std::string)reportData.method_type;
    root["current_time"] = Json::Int64(span_->current_time);
    root["status"] = (int)span_->status;
    root["result"] = 0;

    Json::StreamWriterBuilder builder;
    builder["indentation"] = ""; // 格式化输出

    std::string json_str = Json::writeString(builder, root);

    curl = curl_easy_init();
    if (curl) {
        headers = curl_slist_append(headers, "accept: application/json");
        headers = curl_slist_append(headers, "Content-Type: application/json");

        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
        curl_easy_setopt(curl, CURLOPT_POST, 1L);
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, json_str.c_str());

        res = curl_easy_perform(curl);
        curl_easy_cleanup(curl);
        curl_slist_free_all(headers);

        if (res != CURLE_OK)
            std::cout << "Error: " << curl_easy_strerror(res) << std::endl;
        else
            std::cout << "Request sent successfully" << std::endl;
    }
}