HTTP实现心跳模块
使用轻量级的c++HTTP库cpp-httplib重现实现HTTP心跳模块
头文件HttplibHeartbeat.h
#ifndef HTTPLIB_HEARTBEAT_H
#define HTTPLIB_HEARTBEAT_H#include <string>
#include <thread>
#include <atomic>
#include <chrono>
#include <functional>
#include <memory>
#include "httplib.h"
#include "json.hpp"、using json = nlohmann::json;class HttplibHeartbeat {
public:using ResponseCallback = std::function<void(const std::string& response, bool success)>;/*** @brief 构造函数* @param host 服务器主机名或IP* @param port 服务器端口* @param endpoint 心跳端点路径* @param interval 心跳间隔(秒)*/HttplibHeartbeat(const std::string& host, int port, const std::string& endpoint, unsigned int interval);/** * @param heartbeat_data 心跳数据(将转换为JSON)*/HttplibHeartbeat(const std::string& host, int port, const std::string& endpoint, unsigned int interval,const std::map<std::string, std::string>& heartbeat_data);~HttplibHeartbeat();void start(ResponseCallback callback);void stop();void setInterval(unsigned int interval);bool isRunning() const;void updateHeartbeatData(const std::map<std::string, std::string>& new_data);private:void heartbeatLoop();json createHeartbeatJson() const;std::string m_host;int m_port;std::string m_endpoint;unsigned int m_interval;std::atomic<bool> m_running;std::thread m_thread;ResponseCallback m_callback;std::unique_ptr<httplib::Client> m_client;std::map<std::string, std::string> m_heartbeat_data;
};#endif // HTTPLIB_HEARTBEAT_H
cpp源文件 HttplibHeartbeat.cpp
#include "HttplibHeartbeat.h"
#include <iostream>HttplibHeartbeat::HttplibHeartbeat(const std::string& host, int port, const std::string& endpoint, unsigned int interval): m_host(host), m_port(port), m_endpoint(endpoint), m_interval(interval), m_running(false) {m_client = std::make_unique<httplib::Client>(host, port);// 设置超时时间m_client->set_connection_timeout(3); // 3秒连接超时m_client->set_read_timeout(5); // 5秒读取超时
}HttplibHeartbeat::HttplibHeartbeat(const std::string& host, int port, const std::string& endpoint, unsigned int interval,const std::map<std::string, std::string>& heartbeat_data): m_host(host), m_port(port), m_endpoint(endpoint), m_interval(interval), m_running(false),m_heartbeat_data(heartbeat_data) {m_client = std::make_unique<httplib::Client>(host, port);m_client->set_connection_timeout(3);m_client->set_read_timeout(5);
}HttplibHeartbeat::~HttplibHeartbeat() {stop();
}void HttplibHeartbeat::start(ResponseCallback callback) {if (m_running) {return;}m_callback = callback;m_running = true;m_thread = std::thread(&HttplibHeartbeat::heartbeatLoop, this);
}void HttplibHeartbeat::stop() {if (!m_running) {return;}m_running = false;if (m_thread.joinable()) {m_thread.join();}
}void HttplibHeartbeat::setInterval(unsigned int interval) {m_interval = interval;
}bool HttplibHeartbeat::isRunning() const {return m_running;
}void HttplibHeartbeat::updateHeartbeatData(const std::map<std::string, std::string>& new_data) {m_heartbeat_data = new_data;
}void HttplibHeartbeat::heartbeatLoop() {while (m_running) {std::string response;bool success = false;if (auto res = m_client->Get(m_endpoint.c_str())) {if (res->status == 200) {response = res->body;success = true;} else {response = "HTTP status: " + std::to_string(res->status);}} else {response = "Error: " + httplib::to_string(res.error());}if (m_callback) {m_callback(response, success);}// 等待下一次心跳for (unsigned int i = 0; i < m_interval && m_running; ++i) {std::this_thread::sleep_for(std::chrono::seconds(1));}}
}
/*
void HttplibHeartbeat::heartbeatLoop() {while (m_running) {json response_json;bool success = false;// 创建心跳JSON数据json request_json = createHeartbeatJson();std::string request_body = request_json.dump();// 设置JSON内容类型头httplib::Headers headers = {{"Content-Type", "application/json"}};if (auto res = m_client->Post(m_endpoint.c_str(), headers, request_body, "application/json")) {if (res->status == 200) {try {response_json = json::parse(res->body);success = true;} catch (const json::parse_error& e) {response_json = {{"error", "Failed to parse server response"},{"details", e.what()},{"raw_response", res->body}};}} else {response_json = {{"error", "HTTP request failed"},{"status", res->status},{"body", res->body}};}} else {response_json = {{"error", "Network error"},{"details", httplib::to_string(res.error())}};}if (m_callback) {m_callback(response_json, success);}// 等待下一次心跳for (unsigned int i = 0; i < m_interval && m_running; ++i) {std::this_thread::sleep_for(std::chrono::seconds(1));}}
}
*/
json HttplibHeartbeat::createHeartbeatJson() const {json j;j["type"] = "heartbeat";j["timestamp"] = std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count();// 添加自定义心跳数据for (const auto& [key, value] : m_heartbeat_data) {j[key] = value;}return j;
}
使用实例
#include "HttplibHeartbeat.h"
#include <iostream>int main() {// 创建心跳对象，连接localhost:8080，每5秒发送一次心跳HttplibHeartbeat heartbeat("localhost", 8080, "/api/heartbeat", 5);// 定义回调函数auto callback = [](const std::string& response, bool success) {if (success) {std::cout << "[Heartbeat] Success: " << response << std::endl;} else {std::cerr << "[Heartbeat] Failed: " << response << std::endl;}};/* // 准备心跳数据std::map<std::string, std::string> heartbeat_data = {{"device_id", "12345"},{"version", "1.0.0"},{"status", "active"}};// 创建JSON心跳对象HttplibHeartbeat heartbeat("localhost", 8080, "/api/heartbeat", 10, heartbeat_data);// 定义回调函数auto callback = [](const json& response, bool success) {if (success) {std::cout << "[Heartbeat] Success. Server response:" << std::endl;std::cout << response.dump(4) << std::endl; // 漂亮打印JSON// 可以解析特定字段if (response.contains("next_check_interval")) {std::cout << "Next check in: " << response["next_check_interval"] << "s" << std::endl;}} else {std::cerr << "[Heartbeat] Failed. Error response:" << std::endl;std::cerr << response.dump(4) << std::endl;}};*/// 启动心跳heartbeat.start(callback);std::cout << "Heartbeat started. Press Enter to stop..." << std::endl;std::cin.get();// 停止心跳heartbeat.stop();return 0;
}
编译说明
- 下载 cpp-httplib 头文件
- 将
httplib.h放在项目目录中 - 编译命令示例：
g++ -std=c++11 HttplibHeartbeat.cpp main.cpp -lpthread -o heartbeat