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Thread: how can i send QStringList index by index

  1. #1
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    Default how can i send QStringList index by index

    Hi
    i want send data from client to server index by index.
    but client packet all of index
    i put client code and server result, and sorry for my weak english
    Client Code:
    QStringList ql={"1","2","3","4"};
    foreach (QString tmp, ql) {
    socket->write(tmp.toUtf8()+"\n");
    socket->flush();
    }
    Server Result:
    "1\n2\n3\n4\n"

  2. #2
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    Default Re: how can i send QStringList index by index

    And what's the actual problem? The server received all the data or didn't it?

  3. #3
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    Default Re: how can i send QStringList index by index

    recived all data but client send all of data to one packet!
    I want client send QStringList One by One

    Server code:
    QStringList ql;
    void ::MainWindow readyRead()
    {
    QString buff=QString(qobject_cast<QTcpSocket*>(sender())->readAll());
    qDebug()<<buff;
    ql.append(buff);
    }

    And want server result like this:
    "1\n"
    "2\n"
    "3\n"
    "4\n"

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    Default Re: how can i send QStringList index by index

    tcp is stream-based... so I don't see what's wrong here.

  5. #5
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    Default Re: how can i send QStringList index by index

    actually i have a text file.client must send line by line of file to server and server must process line by line of data but client packet many of line and then send to server.
    as result server recive many of line and wrong process .
    this is my problem i hope you understand .thanks to you

  6. #6
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    Default Re: how can i send QStringList index by index

    Then split your received stream... tcp is a stream - no matter what you want or think. When you want a protocol you have to implement it by your own.

  7. The following user says thank you to ChristianEhrlicher for this useful post:

    Validimir_verekno (22nd June 2021)

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    Default Re: how can i send QStringList index by index

    Quote Originally Posted by Validimir_verekno View Post
    actually i have a text file.client must send line by line of file to server and server must process line by line of data but client packet many of line and then send to server.
    as result server recive many of line and wrong process .
    How does the client (sender) know when the server (receiver) is done processing the last line it received? This is the protocol that Christian Ehrlicher is talking about.

    The client is essentially a state machine that switches between:
    1. Send a line
    2. Wait for signal of completion from server (receive) then go to 1.

  9. #8
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    Default Re: how can i send QStringList index by index

    SOLVED
    thanks to "ChrisW67" & "ChristianEhrlicher"
    i find QStreamData : D
    QStreamData qsd(socket);
    qsd<<File.readLine();

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