实验四 Web服务器2

Web服务器的客户端服务器

web_server.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <arpa/inet.h>

#define PORT 8080
#define BUFFER_SIZE 1024

void handle_client(int client_socket) {
    char buffer[BUFFER_SIZE];
    ssize_t bytes_received;

    // 接收客户端请求
    bytes_received = recv(client_socket, buffer, BUFFER_SIZE, 0);
    if (bytes_received < 0) {
        perror("从套接字读取数据时出错");
        close(client_socket);
        exit(EXIT_FAILURE);
    }

    // 解析HTTP请求
    if (strstr(buffer, "GET") == NULL) {
        fprintf(stderr, "仅支持GET请求。\n");
    } else {
        // 构造HTTP响应
        const char *response = "HTTP/1.1 200 OK\r\n"
                               "Content-Type: text/plain\r\n"
                               "\r\n"
                               "你好，这是一个简单的Web服务器！\n";
        send(client_socket, response, strlen(response), 0);
    }

    // 关闭连接
    close(client_socket);
}

int main() {
    int server_socket, client_socket;
    struct sockaddr_in server_addr, client_addr;
    socklen_t addr_size = sizeof(struct sockaddr_in);

    // 创建套接字
    server_socket = socket(AF_INET, SOCK_STREAM, 0);
    if (server_socket < 0) {
        perror("创建套接字时出错");
        exit(EXIT_FAILURE);
    }

    // 设置服务器地址
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);
    server_addr.sin_addr.s_addr = INADDR_ANY;

    // 将套接字绑定到地址和端口
    if (bind(server_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)) < 0) {
        perror("绑定套接字时出错");
        exit(EXIT_FAILURE);
    }

    // 监听连接
    if (listen(server_socket, 10) == 0) {
        printf("服务器正在监听端口 %d...\n", PORT);
    } else {
        perror("监听套接字时出错");
        exit(EXIT_FAILURE);
    }

    while (1) {
        // 接受连接
        client_socket = accept(server_socket, (struct sockaddr*)&client_addr, &addr_size);
        if (client_socket < 0) {
            perror("接受连接时出错");
            exit(EXIT_FAILURE);
        }

        // 处理客户端请求
        handle_client(client_socket);
    }

    // 关闭服务器套接字
    close(server_socket);

    return 0;
}

web_client.c

e <unistd.h>
#include <arpa/inet.h>

#define SERVER_IP "127.0.0.1"
#define PORT 8080
#define BUFFER_SIZE 1024

int main() {
    int client_socket;
    struct sockaddr_in server_addr;
    char buffer[BUFFER_SIZE];

    // 创建套接字
    client_socket = socket(AF_INET, SOCK_STREAM, 0);
    if (client_socket < 0) {
        perror("创建套接字时出错");
        exit(EXIT_FAILURE);
    }

    // 设置服务器地址
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);
    if (inet_pton(AF_INET, SERVER_IP, &server_addr.sin_addr) <= 0) {
        perror("设置服务器地址时出错");
        exit(EXIT_FAILURE);
    }

    // 连接到服务器
    if (connect(client_socket, (struct sockaddr*)&server_addr, sizeof(server_addr)) < 0) {
        perror("连接服务器时出错");
        exit(EXIT_FAILURE);
    }

    // 构造HTTP GET请求
    const char *request = "GET / HTTP/1.1\r\n"
                          "Host: localhost\r\n"
                          "Connection: close\r\n"
                          "\r\n";
    send(client_socket, request, strlen(request), 0);

    // 接收并打印服务器响应
    ssize_t bytes_received;
    while ((bytes_received = recv(client_socket, buffer, BUFFER_SIZE, 0)) > 0) {
        fwrite(buffer, 1, bytes_received, stdout);
    }

    // 关闭套接字
    close(client_socket);

    return 0;
}

运行结果