main.cpp Example File

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#include "simpleftp.h" #include "ftpcontrolchannel.h" #include "ftpdatachannel.h" #include <QCoreApplication> #include <iostream> struct Command { QString cmd; QString args; }; int main(int argc, char *argv[]) { if (argc != 3) { qDebug() << "Usage: ftpclient <server> <file>"; return 1; } QString server = QString::fromLocal8Bit(argv[1]); QString file = QString::fromLocal8Bit(argv[2]); QCoreApplication app(argc, argv); FtpClient ftpClient; FtpDataChannel dataChannel; FtpControlChannel controlChannel; // Print all data retrieved from the server on the console. QObject::connect(&dataChannel, &FtpDataChannel::dataReceived, [](const QByteArray &data) { std::cout << data.constData(); }); // Translate server replies into state machine events. QObject::connect(&controlChannel, &FtpControlChannel::reply, &ftpClient, [&ftpClient](int code, const QString &parameters) { ftpClient.submitEvent(QString("reply.%1xx").arg(code / 100), parameters); }); // Translate commands from the state machine into FTP control messages. ftpClient.connectToEvent("submit.cmd", &controlChannel, [&controlChannel](const QScxmlEvent &event) { controlChannel.command(,["params"].toByteArray()); }); // Commands to be sent QList<Command> commands({ {"cmd.USER", "anonymous"},// login {"cmd.PORT", ""}, // announce port for data connection, args added below. {"cmd.RETR", file} // retrieve a file }); // When entering "B" state, send the next command. ftpClient.connectToState("B", QScxmlStateMachine::onEntry([&]() { if (commands.isEmpty()) { app.quit(); return; } Command command = commands.takeFirst(); qDebug() << "Posting command" << command.cmd << command.args; ftpClient.submitEvent(command.cmd, command.args); })); // If the server asks for a password, send one. ftpClient.connectToState("P", QScxmlStateMachine::onEntry([&ftpClient]() { qDebug() << "Sending password"; ftpClient.submitEvent("cmd.PASS", QString()); })); // Connect to our own local FTP server controlChannel.connectToServer(server); QObject::connect(&controlChannel, &FtpControlChannel::opened, [&](const QHostAddress &address, int) { dataChannel.listen(address); commands[1].args = dataChannel.portspec(); ftpClient.start(); }); return app.exec(); }

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