/
logindialog.cpp
125 lines (102 loc) · 2.79 KB
/
logindialog.cpp
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#include <QString>
#include <QMessageBox>
#include <QLineEdit>
#include <QTcpSocket>
#include <QDebug>
#include "logindialog.h"
#include "ui_logindialog.h"
LoginDialog::LoginDialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::LoginDialog)
{
ui->setupUi(this);
ui->pwdEdit->setEchoMode(QLineEdit::Password);
serverIp = QString("127.0.0.1");
serverPort = QString("9998");
connect(ui->loginButton,SIGNAL(clicked()),this,SLOT(login()));
connect(this,SIGNAL(verified()),this,SLOT(processVerified()));
connect(this,SIGNAL(unverified()),this,SLOT(processUnverified()));
}
QString LoginDialog::userName()
{
return m_userName;
}
QString LoginDialog::ip()
{
return serverIp;
}
QString LoginDialog::port()
{
return serverPort;
}
LoginDialog::~LoginDialog()
{
delete ui;
}
void LoginDialog::login()
{
m_userName = ui->userNameEdit->text();
m_password = ui->pwdEdit->text();
if(!ui->ipEdit->text().isEmpty())
serverIp = ui->ipEdit->text();
if(!ui->portEdit->text().isEmpty())
serverPort = ui->portEdit->text();
connectToServer();
}
//Connect to specified server ,wait for reply
void LoginDialog::connectToServer()
{
client = new QTcpSocket(this);
client->abort();
client->connectToHost(serverIp,serverPort.toUInt());
blockSize = 0;
connect(client,SIGNAL(connected()),this,SLOT(verify()));
connect(client,SIGNAL(readyRead()),this,SLOT(readMessage()));
}
//Analysis the info read from the server and make decision
void LoginDialog::readMessage()
{
qDebug("message arrive...");
QString result;
QDataStream in(client);
in.setVersion(QDataStream::Qt_4_7);
if(blockSize == 0) {
if(client->bytesAvailable() < (int)sizeof(quint16))
return;
in >> blockSize;
}
if(client->bytesAvailable() < blockSize)
return;
in >> result;
if(result == "True")
emit verified();
else if(result == "False")
emit unverified();
}
void LoginDialog::processVerified()
{
accept();
}
//Tell the user to retry
void LoginDialog::processUnverified()
{
QMessageBox::warning(this,"Warning","Wrong user name or password",QMessageBox::Yes);
ui->userNameEdit->clear();
ui->pwdEdit->clear();
ui->userNameEdit->setFocus();
ui->loginButton->setEnabled(true);
}
//Write to the server to verify the user infomation
void LoginDialog::verify()
{
qDebug("Connected to server...");
ui->loginButton->setDisabled(true);
QByteArray block;
QDataStream out(&block,QIODevice::WriteOnly);
out.setVersion(QDataStream::Qt_4_7);
out << quint16(0) << QString("Verify") << m_userName.trimmed() << m_password.trimmed();
out.device()->seek(0);
out << quint16(block.size() - sizeof(quint16));
qDebug() << block.size();
client->write(block);
}