qt 网络编程参考资料

c++ gui programming with qt4里面Chapter 15里面的

Writing TCP Client–Server Applications

主要介绍了：

建立在tcp上层的通讯，有两种：

1、以文本行格式的协议，用换行符分割

2、二进制区块协议，每个块前面有一个size，后面跟着数据

QTcpSocket is indirectly derived from QIODevice (through QAbstractSocket), so it can be read from and written to using a QDataStream or a QTextStream. One notable difference when reading data from a network compared with reading from a file is that we must make sure that we have received enough data from the peer before we use the >> operator. Failing to do so may result in undefined behavior.

可以用QDataStream or a QTextStream，但是需要注意的是，需要必须确保收到足够的数据才能读取。