QLocalSocket不发送任何内容

Question

嗯，我还在尝试让一台IPC通过QLocalSocket运行。显然，我的套接字连接，连接被接受，但当我尝试发送某些内容时

void ServiceConnector::send_MessageToServer(QString message) {

    if(!connected){
        m_socket->connectToServer(m_serverName);
        m_socket->waitForConnected();

    }

    char str[] = {"hallo welt\0"};
    int c = m_socket->write(str,strlen(str));
    qDebug() << "written: " << c;
}

我得不到response...the服务器的套接字什么也不做。

服务器的读取实现：

void ClientHandler::socket_new_connection() {

    logToFile("incoming connection");

    clientConnection = m_server->nextPendingConnection();

    socket_StateChanged(clientConnection->state());

    auto conn = connect(clientConnection, SIGNAL(disconnected()),this, SLOT(socket_disconnected()));
    conn = connect(clientConnection, SIGNAL(stateChanged(QLocalSocket::LocalSocketState)),this,SLOT(socket_StateChanged(QLocalSocket::LocalSocketState)));
    conn = connect(clientConnection, SIGNAL(readyRead()), this, SLOT(socket_readReady()));

    clientConnection->waitForReadyRead();
    socket_readReady();
}
void ClientHandler::socket_readReady(){
    logToFile("socket is ready to be read");

    logToFile((clientConnection->isOpen())? "open: true":"open: false");
    logToFile((clientConnection->isReadable())? "readable: true":"readable: false");

    QDataStream in(clientConnection);
    in.setVersion(QDataStream::Qt_4_0);
    if (clientConnection->bytesAvailable() < (int)sizeof(quint16)) {
        return;
    }

    QString message;
    in >> message;

    logToFile("Message recieved" + message);

    send(message);
    emit messageReceived(message);
}

输出：

客户端：

[Debug]: ConnectingState 
[Debug]: ConnectedState 
[Debug]: socket_connected 
[Debug]: written:  10 

服务器：

[Debug]: incoming connection
[Debug]: socket is ready to be read
[Debug]: open: true
[Debug]: readable: true

套接字的readReady()信号永远不会发出，所以我决定使用

clientConnection->waitForReadyRead();
socket_readReady();

...but显然这也不起作用。在客户端的write函数之后立即触发waitForReadyRead，我认为这意味着它现在可以读取...

编辑用于调试的auto conn = connection(...)，检查自己是否连接properly....they做

Answer 1

注意:你应该检查一下waitForConnected()的返回值。如果客户端不能设法连接到服务器，那么继续下去就没有意义了。

但我认为你的实际问题是，你正在编写一个简单的8位字符串，比如"hallo \0“，但是你正在用QDataStream读取，它需要一个二进制格式(对于QString，这意味着unicode，长度优先)，这不匹配。