代码：

h文件

#include <iostream>
#include <curl/curl.h>#include <net/if.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <string.h>#include <event.h>
#include <event2/http.h>
#include <event2/http_struct.h>
#include <event2/http_compat.h>
#include <event2/util.h>#include <jsoncpp/json/json.h>#define ETH_NAME "eth0"
#define MYHTTPD_SIGNATURE   "MoCarHttpd v0.1"using namespace std;class RouteTasks{
public:RouteTasks();void init();private:static void routeTasks(struct evhttp_request *req, void *arg);string getIp();int m_port;int m_timeout;
};

cpp文件

#include "platfromcommunication.h"RouteTasks::RouteTasks()
{m_port = 7777;m_timeout = 120;
}void RouteTasks::init()
{//初始化event APIevent_init();//创建一个http serverstruct evhttp *httpd;httpd = evhttp_start(getIp().c_str(), m_port);evhttp_set_timeout(httpd, m_timeout);//也可以为特定的URI指定callbackevhttp_set_cb(httpd, "/wayLine/start", &RouteTasks::routeTasks, NULL);//循环处理eventsevent_dispatch();evhttp_free(httpd);
}void RouteTasks::routeTasks(evhttp_request *req, void *arg)
{char request_data[4096] = {0};//获取POST方法的数据size_t post_size = EVBUFFER_LENGTH(req->input_buffer);char *post_data = (char *) EVBUFFER_DATA(req->input_buffer);memcpy(request_data, post_data, post_size);printf("got startRouteTasks connection post_data = [%s], len =%ld\n", post_data, post_size);//解析获得的数据string task_code;string stream;Json::Value jvalue;Json::Reader jreader;jreader.parse(request_data, jvalue);task_code = jvalue["task_code"].asString();stream = jvalue["stream"].asString();cout<<"task_code: "<<task_code<<" stream: "<<stream<<"\n-------------------------"<<endl;//给前段回复一个响应结果Json::Value root;Json::FastWriter fastWriter;root["code"] = Json::Value("0");root["msg"] = Json::Value("成功");cout<<"return post"<<fastWriter.write(root)<<endl;/* 输出到客户端 *///HTTP headerevhttp_add_header(req->output_headers, "Server", MYHTTPD_SIGNATURE);evhttp_add_header(req->output_headers, "Content-Type", "application/json; charset=UTF-8");evhttp_add_header(req->output_headers, "Connection", "close");//输出的内容struct evbuffer *buf;buf = evbuffer_new();evbuffer_add_printf(buf, "%s", fastWriter.write(root).c_str());//将封装好的evbuffer 发送给客户端evhttp_send_reply(req, HTTP_OK, "OK", buf);evbuffer_free(buf);}string RouteTasks::getIp()
{struct sockaddr_in sin;struct ifreq ifr;int sockfd = socket(AF_INET, SOCK_DGRAM, 0);if(sockfd == -1) {perror("socket error");return "";}strncpy(ifr.ifr_name, ETH_NAME, IFNAMSIZ);if(ioctl(sockfd, SIOCGIFADDR, &ifr) == 0) {memcpy(&sin, &ifr.ifr_addr, sizeof (ifr.ifr_addr));cout<<ETH_NAME<<" ip : "<<inet_ntoa(sin.sin_addr)<<endl;return inet_ntoa(sin.sin_addr);}return "";
}

 main文件

#include <iostream>
#include <signal.h>
#include <jsoncpp/json/json.h>
#include <event.h>
#include <unistd.h>#include "...h"using namespace std;//当向进程发出SIGTERM/SIGHUP/SIGINT/SIGQUIT的时候，终止event的事件侦听循环
void signal_handler(int sig) {switch (sig) {case SIGTERM:case SIGHUP:case SIGQUIT:case SIGINT:event_loopbreak();  //终止侦听event_dispatch()的事件侦听循环，执行之后的代码break;}
}int main()
{cout << "Hello World!" << endl;signal(SIGHUP, signal_handler);signal(SIGTERM, signal_handler);signal(SIGINT, signal_handler);signal(SIGQUIT, signal_handler);RouteTasks rt;rt.init();while (1) {sleep(1);}return 0;
}

http post与get请求：c++ curl post和get请求返回数据解析_c++解析curl返回的json_小鱼仙官的博客-CSDN博客