Add Lesson 6 Task 1

Lesson_6/Task_1/Client/.gitignore

@@ -0,0 +1,74 @@
+# This file is used to ignore files which are generated
+# ----------------------------------------------------------------------------
+
+*~
+*.autosave
+*.a
+*.core
+*.moc
+*.o
+*.obj
+*.orig
+*.rej
+*.so
+*.so.*
+*_pch.h.cpp
+*_resource.rc
+*.qm
+.#*
+*.*#
+core
+!core/
+tags
+.DS_Store
+.directory
+*.debug
+Makefile*
+*.prl
+*.app
+moc_*.cpp
+ui_*.h
+qrc_*.cpp
+Thumbs.db
+*.res
+*.rc
+/.qmake.cache
+/.qmake.stash
+
+# qtcreator generated files
+*.pro.user*
+CMakeLists.txt.user*
+
+# xemacs temporary files
+*.flc
+
+# Vim temporary files
+.*.swp
+
+# Visual Studio generated files
+*.ib_pdb_index
+*.idb
+*.ilk
+*.pdb
+*.sln
+*.suo
+*.vcproj
+*vcproj.*.*.user
+*.ncb
+*.sdf
+*.opensdf
+*.vcxproj
+*vcxproj.*
+
+# MinGW generated files
+*.Debug
+*.Release
+
+# Python byte code
+*.pyc
+
+# Binaries
+# --------
+*.dll
+*.exe
+

Lesson_6/Task_1/Client/Client.pro

@@ -0,0 +1,24 @@
+QT       += core gui network
+
+greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
+
+CONFIG += c++17
+
+# You can make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+    main.cpp \
+    client.cpp
+
+HEADERS += \
+    client.h
+
+FORMS += \
+    client.ui
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target

Lesson_6/Task_1/Client/client.cpp

@@ -0,0 +1,82 @@
+#include "client.h"
+#include "ui_client.h"
+
+Client::Client(QWidget *parent)
+    : QMainWindow(parent)
+    , ui(new Ui::Client)
+{
+    ui->setupUi(this);
+
+    connect (ui->b_connect, &QPushButton::clicked, this, &Client::connectPressed);
+    connect (ui->b_selectFile, &QPushButton::clicked, this, &Client::selectFile);
+    connect (ui->b_send, &QPushButton::clicked, this, &Client::sendFile);
+    connect (m_socket, &QTcpSocket::connected, this, &Client::connectionEstablished);
+}
+
+Client::~Client()
+{
+    delete ui;
+}
+
+void Client::sendFile()
+{
+    ui->l_status->setText("Connected");
+
+    QFile file(m_fileName);
+    QFileInfo fi(m_fileName);
+
+    if (file.open(QIODevice::ReadOnly)) {
+        m_socket->write((fi.fileName() + '\n').toLocal8Bit());
+
+        QTextStream in(&file);
+
+        while (!in.atEnd())
+            m_socket->write((in.readLine() + '\n').toLocal8Bit());
+    }
+
+    ui->l_status->setText("File sent");
+    ui->b_send->setEnabled(false);
+
+}
+
+void Client::connectPressed()
+{
+    if (m_socket->isOpen()) {
+        m_socket->close();
+        ui->l_status->setText("Not connected");
+        ui->b_connect->setText("Connect");
+        ui->b_send->setEnabled(false);
+        return;
+    }
+    QString address = ui->e_address->text();
+    int port = ui->sb_port->value();
+
+    ui->b_connect->setText("Disconnect");
+    ui->l_status->setText("Connecting");
+
+    m_socket->connectToHost(QHostAddress(address), port);
+}
+
+void Client::connectionEstablished()
+{
+    ui->l_status->setText("Connected");
+    checkSendingAllowed();
+}
+
+void Client::checkSendingAllowed()
+{
+    if (!m_fileName.isEmpty() && m_socket->isOpen())
+        ui->b_send->setEnabled(true);
+}
+
+void Client::selectFile()
+{
+    m_fileName = QFileDialog::getOpenFileName(this, "Select file", "", "All Files (*)");
+
+    if (m_fileName.isEmpty())
+        return;
+
+    checkSendingAllowed();
+}
+
+

Lesson_6/Task_1/Client/client.h

@@ -0,0 +1,37 @@
+#ifndef CLIENT_H
+#define CLIENT_H
+
+#include <QMainWindow>
+#include <QFileDialog>
+#include <QHostAddress>
+#include <QTcpSocket>
+
+QT_BEGIN_NAMESPACE
+namespace Ui {
+class Client;
+}
+QT_END_NAMESPACE
+
+class Client : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    Client(QWidget *parent = nullptr);
+    ~Client();
+
+private slots:
+    void sendFile();
+    void connectPressed();
+    void connectionEstablished();
+    void checkSendingAllowed();
+    void selectFile();
+
+private:
+    Ui::Client *ui;
+    QTcpSocket *m_socket = new QTcpSocket();
+    QDataStream m_block;
+    QFile m_file;
+    QString m_fileName;
+};
+#endif // CLIENT_H

Lesson_6/Task_1/Client/client.ui

@@ -0,0 +1,111 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Client</class>
+ <widget class="QMainWindow" name="Client">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>178</width>
+    <height>231</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Client</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <layout class="QHBoxLayout" name="horizontalLayout_3">
+      <item>
+       <widget class="QLabel" name="label">
+        <property name="text">
+         <string>Address:</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QLineEdit" name="e_address"/>
+      </item>
+     </layout>
+    </item>
+    <item>
+     <layout class="QHBoxLayout" name="horizontalLayout_2">
+      <item>
+       <widget class="QLabel" name="label_2">
+        <property name="text">
+         <string>Port:</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QSpinBox" name="sb_port">
+        <property name="minimum">
+         <number>1</number>
+        </property>
+        <property name="maximum">
+         <number>65535</number>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+    <item>
+     <widget class="QPushButton" name="b_connect">
+      <property name="text">
+       <string>Connect</string>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <widget class="QPushButton" name="b_selectFile">
+      <property name="text">
+       <string>Select file</string>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <widget class="QPushButton" name="b_send">
+      <property name="enabled">
+       <bool>false</bool>
+      </property>
+      <property name="text">
+       <string>Send</string>
+      </property>
+     </widget>
+    </item>
+    <item>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QLabel" name="label_3">
+        <property name="text">
+         <string>Status:</string>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QLabel" name="l_status">
+        <property name="text">
+         <string>Not connected</string>
+        </property>
+       </widget>
+      </item>
+     </layout>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>178</width>
+     <height>25</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

Lesson_6/Task_1/Client/main.cpp

@@ -0,0 +1,11 @@
+#include "client.h"
+
+#include <QApplication>
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+    Client w;
+    w.show();
+    return a.exec();
+}

Lesson_6/Task_1/Server/.gitignore

@@ -0,0 +1,74 @@
+# This file is used to ignore files which are generated
+# ----------------------------------------------------------------------------
+
+*~
+*.autosave
+*.a
+*.core
+*.moc
+*.o
+*.obj
+*.orig
+*.rej
+*.so
+*.so.*
+*_pch.h.cpp
+*_resource.rc
+*.qm
+.#*
+*.*#
+core
+!core/
+tags
+.DS_Store
+.directory
+*.debug
+Makefile*
+*.prl
+*.app
+moc_*.cpp
+ui_*.h
+qrc_*.cpp
+Thumbs.db
+*.res
+*.rc
+/.qmake.cache
+/.qmake.stash
+
+# qtcreator generated files
+*.pro.user*
+CMakeLists.txt.user*
+
+# xemacs temporary files
+*.flc
+
+# Vim temporary files
+.*.swp
+
+# Visual Studio generated files
+*.ib_pdb_index
+*.idb
+*.ilk
+*.pdb
+*.sln
+*.suo
+*.vcproj
+*vcproj.*.*.user
+*.ncb
+*.sdf
+*.opensdf
+*.vcxproj
+*vcxproj.*
+
+# MinGW generated files
+*.Debug
+*.Release
+
+# Python byte code
+*.pyc
+
+# Binaries
+# --------
+*.dll
+*.exe
+

Lesson_6/Task_1/Server/Server.pro

@@ -0,0 +1,19 @@
+QT = core network
+
+CONFIG += c++17 cmdline
+
+# You can make your code fail to compile if it uses deprecated APIs.
+# In order to do so, uncomment the following line.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+SOURCES += \
+        main.cpp \
+        server.cpp
+
+# Default rules for deployment.
+qnx: target.path = /tmp/$${TARGET}/bin
+else: unix:!android: target.path = /opt/$${TARGET}/bin
+!isEmpty(target.path): INSTALLS += target
+
+HEADERS += \
+    server.h

Lesson_6/Task_1/Server/main.cpp

@@ -0,0 +1,10 @@
+#include <QCoreApplication>
+#include <server.h>
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication a(argc, argv);
+    Server server;
+    server.start("0.0.0.0", 8081);
+    return a.exec();
+}

Lesson_6/Task_1/Server/server.cpp

@@ -0,0 +1,66 @@
+#include "server.h"
+
+Server::Server(QObject *parent)
+    : QObject{parent}
+{
+    m_server = new QTcpServer();
+
+    connect (m_server, &QTcpServer::newConnection, this, &Server::newClient);
+}
+
+Server::~Server()
+{
+    if (m_server->isListening()) {
+        qDebug() << "Closing server...";
+        m_server->close();
+    }
+    delete m_server;
+}
+
+void Server::start(QString host, int port)
+{
+    bool ok = m_server->listen(QHostAddress(host), port);
+    if (ok) {
+        qDebug() << "We are online!";
+    } else {
+        qDebug() << "Error creating connection: " << m_server->errorString();
+    }
+}
+
+void Server::newClient()
+{
+    QTcpSocket *client = m_server->nextPendingConnection();
+    qDebug() << "Client " << client->localAddress().toString();
+
+    connect (client, &QTcpSocket::disconnected, this, &Server::leftClient);
+    connect (client, &QTcpSocket::readyRead, this, &Server::messageFromClient);
+
+    m_clients.append(client);
+}
+
+void Server::leftClient()
+{
+    QTcpSocket *socket = (QTcpSocket *)sender();
+
+    qDebug() << "Client " << socket->localAddress().toString() << " has been left";
+    m_clients.removeOne(socket);
+}
+
+void Server::messageFromClient()
+{
+    QTcpSocket *socket = (QTcpSocket *)sender();
+    QStringList lines = QString(socket->readAll()).split('\n');
+    QString fileName;
+
+    fileName = lines[0];
+    lines.removeFirst();
+
+    QFile file(fileName);
+    if (file.open(QIODevice::Append)) {
+        for (int line = 0; line < lines.size(); ++ line) {
+            file.write((lines[line] + '\n').toLocal8Bit());
+        }
+    }
+
+    file.close();
+}

Lesson_6/Task_1/Server/server.h

@@ -0,0 +1,38 @@
+#ifndef SERVER_H
+#define SERVER_H
+
+#include <QObject>
+#include <QDataStream>
+#include <QFile>
+#include <QTcpServer>
+#include <QTcpSocket>
+#include <QDebug>
+#include <QVector>
+
+class Server : public QObject
+{
+    Q_OBJECT
+public:
+    explicit Server(QObject *parent = nullptr);
+    ~Server();
+
+public slots:
+    void start(QString host, int port);
+
+private slots:
+    void newClient();
+    void leftClient();
+    void messageFromClient();
+signals:
+
+private:
+    QTcpServer *m_server = nullptr;
+    QVector<QTcpSocket *> m_clients;
+    bool isInfoGot = false;
+    QString fileName;
+    int fileSize;
+
+signals:
+};
+
+#endif // SERVER_H

README.md

@@ -27,7 +27,11 @@ Checked means the task is Done.
 
 ### Lesson 5
 
+- [x] Task 1
+- [x] Task 2
+- [x] Task 3
+- [x] Task 4
+
+### Lesson 6
+
 - [ ] Task 1
-- [ ] Task 2
-- [ ] Task 3
-- [ ] Task 4