[英]Qt QTcpSocket async write
I'm trying to write a dynamic data to a QTcpSocket, this is how I implement it: 我正在尝试将动态数据写入QTcpSocket,这是我实现它的方式:
connect(&m_tcpSocket, SIGNAL(bytesWritten(qint64)), SLOT(written(qint64)));
//...
void MyClass::written(qint64 iBytes)
{
if(iBytes>0)
m_strWrite = m_strWrite.mid(iBytes);
if(m_strWrite.length()<1)
{
if(m_hHandle->isDone())
m_tcpSocket.disconnectFromHost();
}else if(m_tcpSocket.isValid()){
m_tcpSocket.write(m_strWrite);
}
}
//...
void MyClass::dataReady(const QByteArray &strData)
{
bool bWrite = m_strWrite.isEmpty();
m_strWrite.append(strData);
if(bWrite)
written(0);
}
dataReady is a slot which is called whenever there is some data ready, and strData is at most 8192 bytes. dataReady是一个插槽,只要准备好一些数据,就会调用该插槽,strData最多为8192字节。
This method works perfectly, but when data is huge (>500 MB), strange things happen, sometimes data is written much more than what I expect, sometimes some data is missing, sometimes nothing is written after a while and ... 此方法效果很好,但是当数据量很大(> 500 MB)时,会发生奇怪的事情,有时写入的数据超出了我的预期,有时丢失了一些数据,有时过一会儿什么也没写,并且...
I just want dynamic buffer, be written to socket, is there another way for that? 我只想将动态缓冲区写入套接字,是否还有另一种方法?
QTcpSocket
has its own write buffer. QTcpSocket
有自己的写缓冲区。 Just use m_tcpSocket.write(strData)
. 只需使用
m_tcpSocket.write(strData)
。 Qt does not limit the write buffer size. Qt不限制写缓冲区的大小。
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