c++ - Winsock 发送一个字符串

Question

我会尝试向客户端发送一个像“hello world”这样的字符串，但是我只能在一个vector char []中发送“hello”的第一部分，我该如何发送一个字符串？

send(client, win, strlen(win), 0);

win是一个char[]，可以是一个字符串吗？

完整代码为:

  int main(int argc, const char* argv[])
{
    WSADATA wsadata;
    int error = WSAStartup (0x0202, &wsadata);
    if(error == 1) return 1;
    std::cout << "WSA started";
    SOCKET connessione;
    sockaddr_in target;
    target.sin_family = AF_INET;
    target.sin_port = htons (9000);
    target.sin_addr.s_addr = inet_addr("127.0.0.1");
    target.sin_port = htons((u_short)9001);
    connessione = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (connessione == INVALID_SOCKET) 
    { 

        std::cout << "Error socket";
        system("pause>null");
        return INVALID_SOCKET; 
    }
    std::cout << "\nSocket create";
    if(bind(connessione, (sockaddr*)&target, sizeof(target)) != 0) return 0;
    if(listen(connessione, 10) != 0) return 0;
    SOCKET client;
    sockaddr_in from;
    int fromlen = sizeof(from);
    std::cout << "\nWait the client connection...";
    client = accept(connessione, (sockaddr*)&from, &fromlen);
    std::cout << "\nClient connect";
    std::string win;

    std::cout << "\n\nInsert text to send: ";
    std::cin >> win;

    send(client, win, strlen(win), 0);
    std::cout << "\ntext send ok. FINE";
    Sleep(2000);
    system("pause>null");
    closesocket(connessione);
    closesocket(client);
    WSACleanup();
    return 0;
}

Answer 1

转换为 char 数组可能是您正在寻找的:

send(client, win.c_str(), win.size(), 0);

另外如前所述，您应该检查返回值(以检测任何可能的错误)并记住 send 和 recv 并不总是发送/接收第一次尝试所有数据(您必须循环直到发送/接收整个数据)。

编辑:>> 运算符在看到分隔符(空格、换行符等)时停止读取。如果你想阅读整行你可以这样做:

std::getline(std::cin, win);