Question

我正在开发一个客户端 - 服务器应用程序，其中两方都使用boost :: asio。我正在尝试通过TCP发送大量数据（356 kb）在服务器端，我写道：

boost::asio::async_write(Msocket, 
    boost::asio::buffer(sendBuffer,dataLen),
    boost::bind(&ServerSession::onDataWrite, 
        this, boost::asio::placeholders::error,
        boost::asio::placeholders::bytes_trasferred));

onDataWrite很简单：

void ServerSession::onDataWrite(const boost::system::error_code& error, const std::size_t bytesSent) {
    if (error) {
        std::cout << "Error " << error << " while sending data" << std::endl;
    }
}

在客户端：

int readSize = ...; // defined from msg header, in this case equals 300 kbytes.
boost::asio::async_read(*Msocket, 
    boost::asio::buffer(recvBuffer, 50*1024*1024),
    boost::asio::transfer_exactly(readSize),
    boost::bind(&ClientSession::onDataRead, 
        this, boost::asio::placeholders::error,
        boost::asio::placeholders::bytes_trasferred, 
        readSize));

onDataRead是：

void ClientSession::onDataRead(const boost::system::error_code& error, const std::size_t bytesRecvd, const int readSize) {
    if (error || bytesRecvd != readSize) {
        std::cout << "Error " << error << " while getting data, expect " << readSize <<", got " << bytesRecvd << std::endl;
    }
}

在写入期间，服务器端打印

Error system:10014 while sending data

客户打印

Error system:0 while getting data, expect 393216, got 131064

131064 = 128kb - 8个字节的标题。

看起来这个128-kb问题是由发送/接收缓冲区溢出引起的。但是我觉得Boost会照顾那些缓冲区本身，对我来说是透明的。我有什么误解？

发送/接收正好128kb后，boost :: asio错误

0 个答案: