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希望这将是我最后一个与套接字相关的 C++ 问题。我有一个 .SWF 文件，它会发送一个策略文件请求。

我检查我的传入数据 char 0 是否为 <，如下所示：

if (raw[0] == '<')

然后我发送我的政策狗屎：

            send(this->s, Env::Policy().c_str(), sizeof(Env::Policy()), 0);

            std::cout << "Sent " << Env::Policy().c_str() << std::endl;
            running = false;
            closesocket(this->s);
            break;

休息; 将停止 while (this->running) 循环。我的政策字符串：

std::string Env::Policy()
{
    char c = 0;

    return "<?xml version=\"1.0\"?>\r\n<!DOCTYPE cross-domain-policy SYSTEM \"/xml/dtds/cross-domain-policy.dtd\">\r\n<cross-domain-policy>\r\n<allow-access-from domain=\"*\" to-ports=\"1-31111\" />\r\n</cross-domain-policy>" + c;
}

但是每次我发送它，什么都没有发生。套接字不会接收新连接（如在 C# 套接字服务器中）。但是当我在 .swf 上重新连接时，它将接受一个新连接。这是怎么回事？

我的完整 while(this->running) 循环：

while (running)
{
    char c[256];

    int bits = recv(s, c, sizeof(c), 0);

    if (bits > 0)
    {
        std::string data = c;
        std::string raw = data.substr(0, bits);

        std::cout << "First char: " << raw[0] << std::endl;

        if (raw[0] == '<')
        {
            send(this->s, Env::Policy().c_str(), sizeof(Env::Policy()), 0);

            std::cout << "Sent " << Env::Policy().c_str() << std::endl;
            running = false;
            closesocket(this->s);
            break;
        }

        int header = Env::B64Decode(raw.substr(3, 2));

        switch (header)
        {
        case 202:
            this->msg = new ServerMessage("DA");
            this->msg->AddInt32(6);
            this->msg->AddInt32(0);
            this->msg->AddInt32(1);
            this->msg->AddInt32(1);
            this->msg->AddInt32(1);
            this->msg->AddInt32(3);
            this->msg->AddInt32(0);
            this->msg->AddInt32(2);
            this->msg->AddInt32(1);
            this->msg->AddInt32(4);
            this->msg->AddInt32(1);
            this->msg->AddString("dd-MM-yyyy");
            this->msg->AddChar(2);
            this->sendData(this->msg->toString());

            this->msg = new ServerMessage("@H");
            this->msg->AddString("[100,105,110,115,120,125,130,135,140,145,150,155,160,165,170,175,176,177,178,180,185,190,195,200,205,206,207,210,215,220,225,230,235,240,245,250,255,260,265,266,267,270,275,280,281,285,290,295,300,305,500,505,510,515,520,525,530,535,540,545,550,555,565,570,575,580,585,590,595,596,600,605,610,615,620,625,626,627,630,635,640,645,650,655,660,665,667,669,670,675,680,685,690,695,696,700,705,710,715,720,725,730,735,740]");
            this->msg->AddChar(2);
            this->sendData(this->msg->toString());
            break;
        default:
            std::cout << "Unregistered header " << header << std::endl;
            break;
        }
    }
    else
    {
        break;
    }
}
4

1 回答 1

1 
 std::string data = c;

仅当字符串肯定以 0 结尾时才有效

 std::string raw = data.substr(0, bits);

你可以做的更简单

 const std::string raw(c, c+bits);

在您的政策功能中，无缘无故有一个 char c，但如果它的值 > 0，则可能会导致问题。

最重要的是，发送sizeof(Env::Policy())字节根本没有意义，你应该发送整个字符串！

const auto& policy = Env::Policy();
send(this->s, policy, policy.size() + 1, 0);

可能没有+1，这取决于你是否想要0。

于 2013-06-13T12:27:06.380 回答