QTcpSocket多线程通信不触发readyRead信号

Question

Qt版本为5.14.2，系统环境是Linux，程序是打算监听HTTP请求进行响应，代码如下

// TcpServer.cpp

#include <QTcpSocket>
#include <QDebug>

TcpServer::TcpServer()
{
    sql = new SqlOperation();
}

void TcpServer::initConnect(quint16 port = 0)
{
    tcpServer = new QTcpServer(this);
    tcpServer->listen(QHostAddress::Any, port);

    if (!tcpServer->isListening())
    {
        qDebug() << "Failed to connect to server.";
        return;
    }

    qDebug() << "Connecting to the server successfully.";
    qDebug() << "Listening...";

    connect(tcpServer, &QTcpServer::newConnection, this, [ = ]()
    {
        QTcpSocket * tcpSocket = tcpServer->nextPendingConnection();

        ThreadSocket* threadSocket = new ThreadSocket(tcpSocket, sql);
        threadSocket->start();
    });
}



// ThreadSocket.cpp

ThreadSocket::ThreadSocket(QTcpSocket* socket, SqlOperation* sql, QObject *parent) : QThread(parent)
{
    tcpSocket = socket;
    this->sql = sql;
}

void ThreadSocket::run()
{
    connect(tcpSocket, &QTcpSocket::readyRead, [ = ]()
    {
        qDebug() << "A new request.";
        QByteArray byteData = tcpSocket->readAll();
        QByteArray data = QByteArray::fromPercentEncoding(byteData);
        qDebug() << data;

        tcpSocket->write("HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n");
        tcpSocket->close();
        qDebug() << "Response over.";
    });
}

大致逻辑是监听请求连接，之后创建线程将QTcpSocket传入线程，线程接监听ReadyRead信号，并且完成响应。

 

目前出现的问题是ReadyRead信号并没有被触发，尝试过可能是线程还未被执行就结束了的情况，给线程添加exec()并无效果

 

如果所有代码都在主线程下执行，ReadyRead却可以正常触发。

Answer 1

不知道你这个问题是否已经解决, 如果还没有解决的话:

• 这篇博客也许可以解决你的问题👉 ：QTcpSocket连续发送数据的问题

如果你已经解决了该问题, 非常希望你能够分享一下解决方案, 以帮助更多的人 ^-^