c++传输文件到不同计算机上的示例代码

#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>

#define PORT 8080
#define BUFFER_SIZE 4096

int main() {
int server_fd, new_socket;
struct sockaddr_in address;
int opt = 1;
int addrlen = sizeof(address);
char buffer[BUFFER_SIZE] = {0};
std::ofstream outfile(“received_file”, std::ios::binary);

// 创建套接字
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
    perror("socket failed");
    exit(EXIT_FAILURE);
}

// 设置套接字选项
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
    perror("setsockopt");
    exit(EXIT_FAILURE);
}

address.sin_family = AF_INET;
address.sin_addr.s_addr = INADDR_ANY;
address.sin_port = htons(PORT);

// 绑定套接字到端口
if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
    perror("bind failed");
    exit(EXIT_FAILURE);
}

// 监听端口
if (listen(server_fd, 3) < 0) {
    perror("listen");
    exit(EXIT_FAILURE);
}

// 接受客户端连接
if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t*)&addrlen)) < 0) {
    perror("accept");
    exit(EXIT_FAILURE);
}

// 接收文件数据并写入文件
int bytes_read;
while ((bytes_read = read(new_socket, buffer, BUFFER_SIZE)) > 0) {
    outfile.write(buffer, bytes_read);
}

std::cout << "File received successfully.\n";

// 关闭套接字和文件
outfile.close();
close(new_socket);
close(server_fd);

return 0;

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

#define PORT 8080
#define BUFFER_SIZE 4096

int main() {
int sock = 0;
struct sockaddr_in serv_addr;
char buffer[BUFFER_SIZE] = {0};
std::ifstream infile(“file_to_send”, std::ios::binary);

if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
    std::cerr << "\n Socket creation error \n";
    return -1;
}

serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(PORT);

// 将IPv4地址从文本转换为二进制形式
if(inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr) <= 0) {
    std::cerr << "\nInvalid address/ Address not supported \n";
    return -1;
}

if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
    std::cerr << "\nConnection Failed \n";
    return -1;
}

// 读取文件并发送
while (infile.read(buffer, BUFFER_SIZE)) {
    send(sock, buffer, infile.gcount(), 0);
}

// 发送文件的最后一部分（如果有）
if (infile.gcount() > 0) {
    send(sock, buffer, infile.gcount(), 0);
}

std::cout << "File sent successfully.\n";

// 关闭套接字和文件
infile.close();
close(sock);

return 0;
}