C++如何实现简单的HTTP请求_C++网络编程socket发送GET请求

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <cstring>
#include <iostream>

#include <winsock2.h>
#include <ws2tcpip.h>
#include <iostream>
#pragma comment(lib, "ws2_32.lib")

int sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1) {
    std::cerr << "无法创建socket\n";
    return -1;
}

struct sockaddr_in server;
server.sin_family = AF_INET;
server.sin_port = htons(80);
inet_pton(AF_INET, "180.101.49.12", &server.sin_addr); // 百度IP

if (connect(sock, (struct sockaddr*)&server, sizeof(server)) < 0) {
    std::cerr << "连接失败\n";
    close(sock);
    return -1;
}

std::string request = "GET / HTTP/1.1\r\n";
request += "Host: www.baidu.com\r\n";
request += "Connection: close\r\n";  // 告知服务器请求后关闭连接
request += "User-Agent: C++ HTTP Client\r\n";
request += "\r\n"; // 空行表示请求头结束

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

char buffer[4096];
std::string response;

while (true) {
    int bytes = recv(sock, buffer, sizeof(buffer), 0);
    if (bytes <= 0) break; // 连接关闭或出错
    response.append(buffer, bytes);
}

close(sock);
std::cout << response; // 输出完整响应（含状态行、响应头和正文）

WSADATA wsa;
if (WSAStartup(MAKEWORD(2,2), &wsa) != 0) {
    std::cerr << "Winsock初始化失败\n";
    return -1;
}
// ... 中间代码 ...
WSACleanup();