"Go" Qt Socket simple Communication

Recently to use the socket part of QT, online about this part of the data are more complex, I summed up in this, the main part of the socket out to achieve the TCP and UDP simple communication.

1.UDP communication UDP does not have a specific server side and client side, simply to send a message to a specific IP, so I divide it into the sender and the receiver side. Note: You will not be able to use Qt's network features in the. Pro file if you want to add qt + = Networks。 1.1.UDP Send End

2. #include <QtNetwork>
4. QUdpSocket *sender;
6. sender = new QUdpSocket(this);
10. QByteArray datagram = “hello world!”;
14. //UDP广播
16. sender->writeDatagram(datagram.data(),datagram.size(),QHostAddress::Broadcast,6665);
20. //向特定IP发送
22. QHostAddress serverAddress = QHostAddress("10.21.11.66");
24. sender->writeDatagram(datagram.data(), datagram.size(),serverAddress, 6665);
28. /* writeDatagram函数原型，发送成功返回字节数，否则-1
30. qint64 writeDatagram(const char *data,qint64 size,const QHostAddress &address,quint16 port)
32. qint64 writeDatagram(const QByteArray &datagram,const QHostAddress &host,quint16 port)
34. */

1.2.UDP Receiving End

2. #include <QtNetwork>
4. QUdpSocket *receiver;
8. //信号槽
10. private slots:
12. void readPendingDatagrams();
16. receiver = new QUdpSocket(this);
18. receiver->bind(QHostAddress::LocalHost, 6665);
20. connect(receiver, SIGNAL(readyRead()),this, SLOT(readPendingDatagrams()));
24. void readPendingDatagrams()
26. {
28. while (receiver->hasPendingDatagrams()) {
30. QByteArray datagram;
32. datagram.resize(receiver->pendingDatagramSize());
34. receiver->readDatagram(datagram.data(), datagram.size());
36. //数据接收在datagram里
38. /* readDatagram 函数原型
40. qint64 readDatagram(char *data,qint64 maxSize,QHostAddress *address=0,quint16 *port=0)
42. */
44. }
46. }

2.TCP communication TCP Words to complicate points, you must first establish a connection to transfer data, divided into server and client side. 2.1.TCP Client Side

2. #include <QtNetwork>
4. QTcpSocket *client;
8. char *data="hello qt!";
10. client = new QTcpSocket(this);
12. client->connectToHost(QHostAddress("10.21.11.66"), 6665);
14. client->write(data);

2.2.TCP Server Side

2. #include <QtNetwork>
4. QTcpServer *server;
6. QTcpSocket *clientConnection;
10. server = new QTcpServer();
12. server->listen(QHostAddress::Any, 6665);
14. connect(server, SIGNAL(newConnection()), this, SLOT(acceptConnection()));
18. void acceptConnection()
20. {
22. clientConnection = server->nextPendingConnection();
24. connect(clientConnection, SIGNAL(readyRead()), this, SLOT(readClient()));
26. }
30. void readClient()
32. {
34. QString str = clientConnection->readAll();
36. //或者
38. char buf[1024];
40. clientConnection->read(buf,1024);
42. }

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"Go" Qt Socket simple Communication