C++ implements simple Http client

Realize a simple Http client, based on windows platform.
There are three files in total: HttpClient.hpp, HttpClient.cpp, main.cpp

HttpClient.hpp

#include <WinSock2.h>
#include <WS2tcpip.h>
#include <iostream>

using namespace std;

#pragma comment(lib, "ws2_32.lib")


class HttpClient {
    
    

public:
	HttpClient();
	~HttpClient();

	void socketHttp(std::string host, std::string request);

	void postRequest(std::string host, std::string path, std::string post_content);
	void getRequest(std::string host, std::string path, std::string get_content);


private: 
	unsigned short _port = 8892; //端口
	char _revcbuf[1024 * 3]; 

};

HttpClient.cpp

#include "HttpClient.hpp"
#include <sstream>

using namespace std;

HttpClient::HttpClient() {
    
    
	//此处一定要初始化一下，否则gethostbyname返回一直为空
	WSADATA wsa = {
    
     0 };
	if(0 != WSAStartup(MAKEWORD(2, 2), &wsa)) {
    
     //0 表示成功
		cout << "WSAStartup error: " << WSAGetLastError() << endl;
		return;
	}
	cout << "WSAStartup success: " << endl;
}

HttpClient::~HttpClient() {
    
    
	//清理winsock2的环境
	WSACleanup();
}

void HttpClient::socketHttp(std::string host, std::string request) {
    
    
	sockaddr_in addr;

	SOCKET sockfd = socket(AF_INET, SOCK_STREAM, 0);
	addr.sin_family = AF_INET;
	addr.sin_port = htons(_port);
	inet_pton(AF_INET, host.c_str(), &addr.sin_addr);//ip地址转网络字节序

	if(SOCKET_ERROR == connect(sockfd, (struct sockaddr *)&addr, sizeof(sockaddr_in))) {
    
    
		cout << "connect error : " << WSAGetLastError() << endl;
		return;
	}

	send(sockfd, request.c_str(), request.size(), 0);

	cout << "client 发送数据: " << request.c_str() << endl;
	memset(_revcbuf, 0, sizeof(_revcbuf));
	//循环接收
	int offset = 0;
	int rc;
	while(rc = recv(sockfd, _revcbuf + offset, 1024, 0)) {
    
    
		offset += rc;
	}

	closesocket(sockfd);

	_revcbuf[offset] = 0;
	cout << "client 接收数据: " << _revcbuf << endl;
}

void HttpClient::postRequest(std::string host, std::string path, std::string post_content) {
    
    
	//POST请求方式
	std::stringstream stream;
	stream << "POST " << path;
	stream << " HTTP/1.0\r\n";
	stream << "Host: " << host << "\r\n";
	stream << "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3\r\n";
	stream << "Content-Type:application/x-www-form-urlencoded\r\n";
	stream << "Content-Length:" << post_content.length() << "\r\n";
	stream << "Connection:close\r\n\r\n";
	stream << post_content.c_str();

	socketHttp(host, stream.str());
}

void HttpClient::getRequest(std::string host, std::string path, std::string get_content) {
    
    
	//GET请求方式
	std::stringstream stream;
	stream << "GET " << path << "?" << get_content;
	stream << " HTTP/1.0\r\n";
	stream << "Host: " << host << "\r\n";
	stream << "User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3\r\n";
	stream << "Connection:close\r\n\r\n";

	socketHttp(host, stream.str());
}

main.cpp

#include "HttpClient.hpp"

int main(int argc, char* argv[]) {
    
    
	HttpClient *http = new HttpClient();
	http->getRequest("127.0.0.1", "/login", "id=liukang&pw=123");
	http->postRequest("127.0.0.1", "/login", "id=liukang&pw=123");

	getchar();
}