C语言网络编程中Web客户端开发的疑难解答

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>

int main() {
    // 创建 socket
    int client_socket = socket(AF_INET, SOCK_STREAM, 0);
    if (client_socket == -1) {
        perror("Socket creation failed");
        return EXIT_FAILURE;
    }

    // 连接到服务器
    struct sockaddr_in server_addr;
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(8080);
    server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    if (connect(client_socket, (struct sockaddr *)&server_addr, sizeof(server_addr)) < 0) {
        perror("Connection failed");
        return EXIT_FAILURE;
    }

    // 发送请求
    const char *request = "GET / HTTP/1.1\r\nHost: 127.0.0.1:8080\r\n\r\n";
    int sent_bytes = send(client_socket, request, strlen(request), 0);
    if (sent_bytes < 0) {
        perror("Send failed");
        return EXIT_FAILURE;
    }

    // 接收响应
    char response[4096];
    int received_bytes = recv(client_socket, response, sizeof(response), 0);
    if (received_bytes < 0) {
        perror("Receive failed");
        return EXIT_FAILURE;
    }

    // 打印响应
    printf("%s", response);

    // 释放资源
    close(client_socket);
    return EXIT_SUCCESS;
}