├── .github └── FUNDING.yml ├── .gitignore ├── LICENSE ├── README.md ├── client-server-qml ├── clientPart │ ├── BetterButton.qml │ ├── LayoutSection.qml │ ├── backend.cpp │ ├── backend.h │ ├── clientPart.pro │ ├── clientStuff.cpp │ ├── clientStuff.h │ ├── main.cpp │ ├── main.qml │ └── qml.qrc └── serverPart │ ├── BetterButton.qml │ ├── LayoutSection.qml │ ├── backend.cpp │ ├── backend.h │ ├── main.cpp │ ├── main.qml │ ├── qml.qrc │ ├── serverPart.pro │ ├── serverStuff.cpp │ └── serverStuff.h ├── client-server-widgets ├── clientPart │ ├── clientPart.pro │ ├── clientStuff.cpp │ ├── clientStuff.h │ ├── main.cpp │ ├── mainwindow.cpp │ ├── mainwindow.h │ └── mainwindow.ui └── serverPart │ ├── main.cpp │ ├── mainwindow.cpp │ ├── mainwindow.h │ ├── mainwindow.ui │ ├── serverPart.pro │ ├── serverStuff.cpp │ └── serverStuff.h └── img ├── qml-client-server.png └── widgets-client-server.png /.github/FUNDING.yml: -------------------------------------------------------------------------------- 1 | github: [retifrav] 2 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | .DS_Store 2 | **/build-*/* 3 | *.user 4 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Qt client-server 2 | 3 | Two GUI-applications, client and server, communicating over network via TCP ([QTcpServer](http://doc.qt.io/qt-5/qtcpserver.html) and [QTcpSocket](http://doc.qt.io/qt-5/qtcpsocket.html)). 4 | 5 | Based on Qt and implemented in two ways: 6 | 7 | 1. [Qt Widgets](https://doc.qt.io/qt-5.10/qtwidgets-index.html) - classic and boring desktop application: 8 | 9 | ![client-server](/img/widgets-client-server.png "Client-server apps on Qt Widgets") 10 | 11 | 2. [Qt Quick / QML](https://doc.qt.io/qt-5.10/qtquick-index.html) - a bit more fancy one, to show how Qt Quick applications can rely on C++ backend: 12 | 13 | ![client-server](/img/qml-client-server.png "Client-server apps on Qt Quick/QML") 14 | 15 | More details in the following [article](https://retifrav.github.io/blog/2018/03/08/qt-client-server-qml/). 16 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/BetterButton.qml: -------------------------------------------------------------------------------- 1 | import QtQuick 2.10 2 | import QtQuick.Controls 2.3 3 | 4 | Button { 5 | id: control 6 | 7 | leftPadding: padding + 10 8 | topPadding: padding + 5 9 | rightPadding: padding + 10 10 | bottomPadding: padding + 5 11 | 12 | property alias color: back.color 13 | property alias border: back.border 14 | 15 | contentItem: Text { 16 | text: control.text 17 | font.pixelSize: 14 18 | } 19 | 20 | background: Rectangle { 21 | id: back 22 | border.width: 1 23 | radius: 5 24 | } 25 | } 26 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/LayoutSection.qml: -------------------------------------------------------------------------------- 1 | import QtQuick 2.10 2 | import QtQuick.Controls 2.3 3 | import QtQuick.Layouts 1.3 4 | 5 | Rectangle { 6 | Layout.leftMargin: 15 7 | Layout.rightMargin: 15 8 | Layout.topMargin: 5 9 | Layout.bottomMargin: 5 10 | Layout.fillWidth: true 11 | color: "#F4F2F5" 12 | border.color: "gray" 13 | border.width: 1 14 | } 15 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/backend.cpp: -------------------------------------------------------------------------------- 1 | #include "backend.h" 2 | 3 | Backend::Backend(QObject *parent) : QObject(parent) 4 | { 5 | client = new ClientStuff("localhost", 6547); 6 | 7 | //setStatus(client->get_status()); 8 | 9 | connect(client, &ClientStuff::hasReadSome, this, &Backend::receivedSomething); 10 | connect(client, &ClientStuff::statusChanged, this, &Backend::setStatus); 11 | // FIXME change this connection to the new syntax 12 | connect(client->tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), 13 | this, SLOT(gotError(QAbstractSocket::SocketError))); 14 | } 15 | 16 | bool Backend::getStatus() 17 | { 18 | return client->getStatus(); 19 | } 20 | 21 | void Backend::setStatus(bool newStatus) 22 | { 23 | //qDebug() << "new status is:" << newStatus; 24 | if (newStatus) 25 | { emit statusChanged("CONNECTED"); } 26 | else 27 | { emit statusChanged("DISCONNECTED"); } 28 | } 29 | 30 | void Backend::receivedSomething(QString msg) 31 | { 32 | emit someMessage(msg); 33 | } 34 | 35 | void Backend::gotError(QAbstractSocket::SocketError err) 36 | { 37 | //qDebug() << "got error"; 38 | QString strError = "unknown"; 39 | switch (err) 40 | { 41 | case 0: 42 | strError = "Connection was refused"; 43 | break; 44 | case 1: 45 | strError = "Remote host closed the connection"; 46 | break; 47 | case 2: 48 | strError = "Host address was not found"; 49 | break; 50 | case 5: 51 | strError = "Connection timed out"; 52 | break; 53 | default: 54 | strError = "Unknown error"; 55 | } 56 | 57 | emit someError(strError); 58 | } 59 | 60 | void Backend::connectClicked() 61 | { 62 | client->connect2host(); 63 | } 64 | 65 | void Backend::sendClicked(QString msg) 66 | { 67 | QByteArray arrBlock; 68 | QDataStream out(&arrBlock, QIODevice::WriteOnly); 69 | //out.setVersion(QDataStream::Qt_5_10); 70 | out << quint16(0) << msg; 71 | 72 | out.device()->seek(0); 73 | out << quint16(arrBlock.size() - sizeof(quint16)); 74 | 75 | client->tcpSocket->write(arrBlock); 76 | } 77 | 78 | void Backend::disconnectClicked() 79 | { 80 | client->closeConnection(); 81 | } 82 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/backend.h: -------------------------------------------------------------------------------- 1 | #ifndef BACKEND_H 2 | #define BACKEND_H 3 | 4 | #include 5 | #include "clientStuff.h" 6 | 7 | class Backend : public QObject 8 | { 9 | Q_OBJECT 10 | Q_PROPERTY(bool currentStatus READ getStatus NOTIFY statusChanged) 11 | 12 | public: 13 | explicit Backend(QObject *parent = nullptr); 14 | bool getStatus(); 15 | 16 | signals: 17 | void statusChanged(QString newStatus); 18 | void someError(QString err); 19 | void someMessage(QString msg); 20 | 21 | public slots: 22 | void setStatus(bool newStatus); 23 | void receivedSomething(QString msg); 24 | void gotError(QAbstractSocket::SocketError err); 25 | void sendClicked(QString msg); 26 | void connectClicked(); 27 | void disconnectClicked(); 28 | 29 | private: 30 | ClientStuff *client; 31 | }; 32 | 33 | #endif // BACKEND_H 34 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/clientPart.pro: -------------------------------------------------------------------------------- 1 | QT += quick 2 | CONFIG += c++11 3 | 4 | MOC_DIR += generated/mocs 5 | UI_DIR += generated/uis 6 | RCC_DIR += generated/rccs 7 | OBJECTS_DIR += generated/objs 8 | 9 | # The following define makes your compiler emit warnings if you use 10 | # any feature of Qt which as been marked deprecated (the exact warnings 11 | # depend on your compiler). Please consult the documentation of the 12 | # deprecated API in order to know how to port your code away from it. 13 | DEFINES += QT_DEPRECATED_WARNINGS 14 | 15 | # You can also make your code fail to compile if you use deprecated APIs. 16 | # In order to do so, uncomment the following line. 17 | # You can also select to disable deprecated APIs only up to a certain version of Qt. 18 | #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 19 | 20 | SOURCES += main.cpp \ 21 | clientStuff.cpp \ 22 | backend.cpp 23 | 24 | RESOURCES += qml.qrc 25 | 26 | # Additional import path used to resolve QML modules in Qt Creator's code model 27 | QML_IMPORT_PATH = 28 | 29 | # Additional import path used to resolve QML modules just for Qt Quick Designer 30 | QML_DESIGNER_IMPORT_PATH = 31 | 32 | # Default rules for deployment. 33 | qnx: target.path = /tmp/$${TARGET}/bin 34 | else: unix:!android: target.path = /opt/$${TARGET}/bin 35 | !isEmpty(target.path): INSTALLS += target 36 | 37 | HEADERS += \ 38 | clientStuff.h \ 39 | backend.h 40 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/clientStuff.cpp: -------------------------------------------------------------------------------- 1 | #include "clientStuff.h" 2 | 3 | ClientStuff::ClientStuff(const QString hostAddress, int portNumber) : QObject(), m_nNextBlockSize(0) 4 | { 5 | status = false; 6 | tcpSocket = new QTcpSocket(); 7 | 8 | host = hostAddress; 9 | port = portNumber; 10 | 11 | timeoutTimer = new QTimer(); 12 | timeoutTimer->setSingleShot(true); 13 | connect(timeoutTimer, &QTimer::timeout, this, &ClientStuff::connectionTimeout); 14 | 15 | connect(tcpSocket, &QTcpSocket::disconnected, this, &ClientStuff::closeConnection); 16 | } 17 | 18 | void ClientStuff::connect2host() 19 | { 20 | timeoutTimer->start(3000); 21 | 22 | tcpSocket->connectToHost(host, port); 23 | connect(tcpSocket, &QTcpSocket::connected, this, &ClientStuff::connected); 24 | connect(tcpSocket, &QTcpSocket::readyRead, this, &ClientStuff::readyRead); 25 | } 26 | 27 | void ClientStuff::connectionTimeout() 28 | { 29 | //qDebug() << tcpSocket->state(); 30 | if(tcpSocket->state() == QAbstractSocket::ConnectingState) 31 | { 32 | tcpSocket->abort(); 33 | emit tcpSocket->error(QAbstractSocket::SocketTimeoutError); 34 | } 35 | } 36 | 37 | void ClientStuff::connected() 38 | { 39 | status = true; 40 | emit statusChanged(status); 41 | } 42 | 43 | bool ClientStuff::getStatus() {return status;} 44 | 45 | void ClientStuff::readyRead() 46 | { 47 | QDataStream in(tcpSocket); 48 | //in.setVersion(QDataStream::Qt_5_10); 49 | for (;;) 50 | { 51 | if (!m_nNextBlockSize) 52 | { 53 | if (tcpSocket->bytesAvailable() < sizeof(quint16)) { break; } 54 | in >> m_nNextBlockSize; 55 | } 56 | 57 | if (tcpSocket->bytesAvailable() < m_nNextBlockSize) { break; } 58 | 59 | QString str; in >> str; 60 | 61 | if (str == "0") 62 | { 63 | str = "Connection closed"; 64 | closeConnection(); 65 | } 66 | 67 | emit hasReadSome(str); 68 | m_nNextBlockSize = 0; 69 | } 70 | } 71 | 72 | //void ClientStuff::gotDisconnection() 73 | //{ 74 | // status = false; 75 | // emit statusChanged(status); 76 | //} 77 | 78 | void ClientStuff::closeConnection() 79 | { 80 | timeoutTimer->stop(); 81 | 82 | //qDebug() << tcpSocket->state(); 83 | disconnect(tcpSocket, &QTcpSocket::connected, 0, 0); 84 | disconnect(tcpSocket, &QTcpSocket::readyRead, 0, 0); 85 | 86 | bool shouldEmit = false; 87 | switch (tcpSocket->state()) 88 | { 89 | case 0: 90 | tcpSocket->disconnectFromHost(); 91 | shouldEmit = true; 92 | break; 93 | case 2: 94 | tcpSocket->abort(); 95 | shouldEmit = true; 96 | break; 97 | default: 98 | tcpSocket->abort(); 99 | } 100 | 101 | if (shouldEmit) 102 | { 103 | status = false; 104 | emit statusChanged(status); 105 | } 106 | } 107 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/clientStuff.h: -------------------------------------------------------------------------------- 1 | #ifndef CLIENTSTUFF_H 2 | #define CLIENTSTUFF_H 3 | 4 | #include 5 | #include 6 | #include 7 | #include 8 | 9 | class ClientStuff : public QObject 10 | { 11 | Q_OBJECT 12 | 13 | public: 14 | ClientStuff(const QString host, int port); 15 | 16 | QTcpSocket *tcpSocket; 17 | bool getStatus(); 18 | 19 | public slots: 20 | void closeConnection(); 21 | void connect2host(); 22 | 23 | signals: 24 | void statusChanged(bool); 25 | void hasReadSome(QString msg); 26 | 27 | private slots: 28 | void readyRead(); 29 | void connected(); 30 | void connectionTimeout(); 31 | 32 | private: 33 | QString host; 34 | int port; 35 | bool status; 36 | quint16 m_nNextBlockSize; 37 | QTimer *timeoutTimer; 38 | }; 39 | 40 | #endif // CLIENTSTUFF_H 41 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include "backend.h" 4 | 5 | int main(int argc, char *argv[]) 6 | { 7 | // qputenv("QSG_VISUALIZE", "overdraw"); 8 | 9 | QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling); 10 | 11 | QGuiApplication app(argc, argv); 12 | 13 | qmlRegisterType("io.qt.Backend", 1, 0, "Backend"); 14 | 15 | QQmlApplicationEngine engine; 16 | engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); 17 | if (engine.rootObjects().isEmpty()) { return -1; } 18 | 19 | return app.exec(); 20 | } 21 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/main.qml: -------------------------------------------------------------------------------- 1 | import QtQuick 2.10 2 | import QtQuick.Window 2.10 3 | import QtQuick.Controls 2.3 4 | import QtQuick.Layouts 1.3 5 | import io.qt.Backend 1.0 6 | 7 | Window { 8 | visible: true 9 | width: 700 10 | minimumWidth: 500 11 | height: 450 12 | minimumHeight: 200 13 | title: "Client" 14 | color: "#CED0D4" 15 | 16 | Backend { 17 | id: backend 18 | 19 | onStatusChanged: { 20 | //console.log(currentStatus); 21 | ti.append(addMsg(newStatus)); 22 | if (currentStatus !== true) 23 | { 24 | btn_connect.enabled = true; 25 | } 26 | } 27 | onSomeMessage: { 28 | ti.append(addMsg(msg)); 29 | } 30 | onSomeError: { 31 | ti.append(addMsg("Error! " + err)); 32 | if (currentStatus !== true) 33 | { 34 | backend.disconnectClicked(); 35 | } 36 | btn_connect.enabled = true; 37 | } 38 | } 39 | 40 | ColumnLayout 41 | { 42 | anchors.fill: parent 43 | anchors.margins: 10 44 | 45 | LayoutSection { 46 | height: status.height + 15 47 | color: backend.currentStatus ? "#CAF5CF" : "#EA9FA9" 48 | 49 | Text { 50 | id: status 51 | anchors.centerIn: parent 52 | text: backend.currentStatus ? "CONNECTED" : "DISCONNECTED" 53 | font.weight: Font.Bold 54 | } 55 | } 56 | 57 | RowLayout { 58 | anchors.horizontalCenter: parent.horizontalCenter 59 | 60 | BetterButton { 61 | id: btn_connect 62 | anchors.left: parent.left 63 | text: "Connect to server" 64 | color: enabled ? this.down ? "#78C37F" : "#87DB8D" : "gray" 65 | border.color: "#78C37F" 66 | onClicked: { 67 | ti.append(addMsg("Connecting to server...")); 68 | backend.connectClicked(); 69 | this.enabled = false; 70 | } 71 | } 72 | BetterButton { 73 | id: btn_disconnect 74 | enabled: !btn_connect.enabled 75 | anchors.right: parent.right 76 | text: "Disconnect from server" 77 | color: enabled ? this.down ? "#DB7A74" : "#FF7E79" : "gray" 78 | border.color: "#DB7A74" 79 | onClicked: { 80 | ti.append(addMsg("Disconnecting from server...")); 81 | backend.disconnectClicked(); 82 | btn_connect.enabled = true; 83 | } 84 | } 85 | } 86 | 87 | LayoutSection { 88 | Layout.fillHeight: true 89 | 90 | ScrollView { 91 | id: scrollView 92 | anchors.fill: parent 93 | 94 | TextArea { 95 | id: ti 96 | readOnly: true 97 | selectByMouse : true 98 | font.pixelSize: 14 99 | wrapMode: TextInput.WrapAnywhere 100 | } 101 | } 102 | } 103 | 104 | RowLayout { 105 | Layout.leftMargin: 15 106 | Layout.rightMargin: 15 107 | Layout.topMargin: 5 108 | Layout.bottomMargin: 5 109 | 110 | Rectangle { 111 | Layout.fillWidth: true 112 | height: btn_send.height 113 | color: "#F4F2F5" 114 | border.color: "gray" 115 | border.width: 1 116 | 117 | TextInput { 118 | id: msgToSend 119 | anchors.verticalCenter: parent.verticalCenter 120 | leftPadding: 10 121 | rightPadding: 10 122 | width: parent.width 123 | font.pixelSize: 14 124 | clip: true 125 | } 126 | } 127 | 128 | BetterButton { 129 | id: btn_send 130 | enabled: !btn_connect.enabled 131 | text: "Send" 132 | color: enabled ? this.down ? "#6FA3D2" : "#7DB7E9" : "gray" 133 | border.color: "#6FA3D2" 134 | onClicked: { 135 | ti.append(addMsg("Sending message...")); 136 | backend.sendClicked(msgToSend.text); 137 | } 138 | } 139 | } 140 | } 141 | 142 | Component.onCompleted: { 143 | ti.text = addMsg("Application started\n- - - - - -", false); 144 | } 145 | 146 | function addMsg(someText) 147 | { 148 | return "[" + currentTime() + "] " + someText; 149 | } 150 | 151 | function currentTime() 152 | { 153 | var now = new Date(); 154 | var nowString = ("0" + now.getHours()).slice(-2) + ":" 155 | + ("0" + now.getMinutes()).slice(-2) + ":" 156 | + ("0" + now.getSeconds()).slice(-2); 157 | return nowString; 158 | } 159 | } 160 | -------------------------------------------------------------------------------- /client-server-qml/clientPart/qml.qrc: -------------------------------------------------------------------------------- 1 | 2 | 3 | main.qml 4 | BetterButton.qml 5 | LayoutSection.qml 6 | 7 | 8 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/BetterButton.qml: -------------------------------------------------------------------------------- 1 | import QtQuick 2.10 2 | import QtQuick.Controls 2.3 3 | 4 | Button { 5 | id: control 6 | 7 | leftPadding: padding + 10 8 | topPadding: padding + 5 9 | rightPadding: padding + 10 10 | bottomPadding: padding + 5 11 | 12 | property alias color: back.color 13 | property alias border: back.border 14 | 15 | contentItem: Text { 16 | text: control.text 17 | font.pixelSize: 14 18 | } 19 | 20 | background: Rectangle { 21 | id: back 22 | border.width: 1 23 | radius: 5 24 | } 25 | } 26 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/LayoutSection.qml: -------------------------------------------------------------------------------- 1 | import QtQuick 2.10 2 | import QtQuick.Controls 2.3 3 | import QtQuick.Layouts 1.3 4 | 5 | Rectangle { 6 | Layout.leftMargin: 15 7 | Layout.rightMargin: 15 8 | Layout.topMargin: 5 9 | Layout.bottomMargin: 5 10 | Layout.fillWidth: true 11 | color: "#F4F2F5" 12 | border.color: "gray" 13 | border.width: 1 14 | } 15 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/backend.cpp: -------------------------------------------------------------------------------- 1 | #include "backend.h" 2 | #include "serverStuff.h" 3 | 4 | Backend::Backend(QObject *parent) : QObject(parent) 5 | { 6 | server = new ServerStuff(); 7 | connect(server, &ServerStuff::gotNewMesssage, this, &Backend::gotNewMesssage); 8 | connect(server->tcpServer, &QTcpServer::newConnection, this, &Backend::smbConnectedToServer); 9 | connect(server, &ServerStuff::smbDisconnected, this, &Backend::smbDisconnectedFromServer); 10 | } 11 | 12 | QString Backend::startClicked() 13 | { 14 | if (!server->tcpServer->listen(QHostAddress::Any, 6547)) 15 | { 16 | return "Error! The port is taken by some other service"; 17 | } 18 | else 19 | { 20 | connect(server->tcpServer, &QTcpServer::newConnection, server, &ServerStuff::newConnection); 21 | return "Server started, port is openned"; 22 | } 23 | } 24 | 25 | QString Backend::stopClicked() 26 | { 27 | if(server->tcpServer->isListening()) 28 | { 29 | disconnect(server->tcpServer, &QTcpServer::newConnection, server, &ServerStuff::newConnection); 30 | 31 | QList clients = server->getClients(); 32 | for(int i = 0; i < clients.count(); i++) 33 | { 34 | //server->sendToClient(clients.at(i), "Connection closed"); 35 | server->sendToClient(clients.at(i), "0"); 36 | } 37 | 38 | server->tcpServer->close(); 39 | return "Server stopped, post is closed"; 40 | } 41 | else 42 | { 43 | return "Error! Server was not running"; 44 | } 45 | } 46 | 47 | QString Backend::testClicked() 48 | { 49 | if(server->tcpServer->isListening()) 50 | { 51 | return QString("%1 %2") 52 | .arg("Server is listening, number of connected clients:") 53 | .arg(QString::number(server->getClients().count())); 54 | } 55 | else 56 | { 57 | return QString("%1 %2") 58 | .arg("Server is not listening, number of connected clients:") 59 | .arg(QString::number(server->getClients().count())); 60 | } 61 | } 62 | 63 | void Backend::smbConnectedToServer() 64 | { 65 | emit smbConnected(); 66 | } 67 | 68 | void Backend::smbDisconnectedFromServer() 69 | { 70 | emit smbDisconnected(); 71 | } 72 | 73 | void Backend::gotNewMesssage(QString msg) 74 | { 75 | emit newMessage(msg); 76 | } 77 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/backend.h: -------------------------------------------------------------------------------- 1 | #ifndef BACKEND_H 2 | #define BACKEND_H 3 | 4 | #include 5 | #include "serverStuff.h" 6 | 7 | class Backend : public QObject 8 | { 9 | Q_OBJECT 10 | public: 11 | explicit Backend(QObject *parent = nullptr); 12 | 13 | signals: 14 | void smbConnected(); 15 | void smbDisconnected(); 16 | void newMessage(QString msg); 17 | 18 | public slots: 19 | QString stopClicked(); 20 | QString startClicked(); 21 | QString testClicked(); 22 | void smbConnectedToServer(); 23 | void smbDisconnectedFromServer(); 24 | void gotNewMesssage(QString msg); 25 | 26 | private: 27 | ServerStuff *server; 28 | }; 29 | 30 | #endif // BACKEND_H 31 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include "backend.h" 4 | 5 | int main(int argc, char *argv[]) 6 | { 7 | //qputenv("QSG_VISUALIZE", "overdraw"); 8 | 9 | QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling); 10 | 11 | QGuiApplication app(argc, argv); 12 | 13 | qmlRegisterType("io.qt.Backend", 1, 0, "Backend"); 14 | 15 | QQmlApplicationEngine engine; 16 | engine.load(QUrl(QStringLiteral("qrc:/main.qml"))); 17 | if (engine.rootObjects().isEmpty()) { return -1; } 18 | 19 | return app.exec(); 20 | } 21 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/main.qml: -------------------------------------------------------------------------------- 1 | import QtQuick 2.10 2 | import QtQuick.Window 2.10 3 | import QtQuick.Controls 2.3 4 | import QtQuick.Layouts 1.3 5 | import io.qt.Backend 1.0 6 | 7 | Window { 8 | visible: true 9 | width: 700 10 | minimumWidth: 500 11 | height: 450 12 | minimumHeight: 200 13 | title: "Server" 14 | color: "#CED0D4" 15 | 16 | Backend { 17 | id: backend 18 | onSmbConnected: { 19 | ti.append(addMsg("Somebody has connected")); 20 | } 21 | onSmbDisconnected: { 22 | ti.append(addMsg("Somebody has disconnected")); 23 | } 24 | onNewMessage: { 25 | ti.append(addMsg("New message: " + msg)); 26 | } 27 | } 28 | 29 | ColumnLayout 30 | { 31 | anchors.fill: parent 32 | anchors.margins: 10 33 | 34 | RowLayout { 35 | anchors.horizontalCenter: parent.horizontalCenter 36 | 37 | BetterButton { 38 | id: btn_start 39 | anchors.left: parent.left 40 | text: "Start server" 41 | color: enabled ? this.down ? "#78C37F" : "#87DB8D" : "gray" 42 | border.color: "#78C37F" 43 | onClicked: { 44 | ti.append(addMsg(backend.startClicked())); 45 | this.enabled = false; 46 | } 47 | } 48 | BetterButton { 49 | enabled: !btn_start.enabled 50 | anchors.right: parent.right 51 | text: "Stop server" 52 | color: enabled ? this.down ? "#DB7A74" : "#FF7E79" : "gray" 53 | border.color: "#DB7A74" 54 | onClicked: { 55 | ti.append(addMsg(backend.stopClicked())); 56 | btn_start.enabled = true; 57 | } 58 | } 59 | } 60 | 61 | LayoutSection { 62 | Layout.fillHeight: true 63 | 64 | ScrollView { 65 | id: scrollView 66 | anchors.fill: parent 67 | 68 | TextArea { 69 | id: ti 70 | readOnly: true 71 | selectByMouse : true 72 | font.pixelSize: 14 73 | wrapMode: TextInput.WrapAnywhere 74 | } 75 | } 76 | } 77 | 78 | BetterButton { 79 | anchors.horizontalCenter: parent.horizontalCenter 80 | text: "Test connection" 81 | color: this.down ? "#6FA3D2" : "#7DB7E9" 82 | border.color: "#6FA3D2" 83 | onClicked: { 84 | ti.append(addMsg(backend.testClicked())); 85 | } 86 | } 87 | } 88 | 89 | Component.onCompleted: { 90 | ti.text = addMsg("Application started\n- - - - - -"); 91 | } 92 | 93 | function addMsg(someText) 94 | { 95 | return "[" + currentTime() + "] " + someText; 96 | } 97 | 98 | function currentTime() 99 | { 100 | var now = new Date(); 101 | var nowString = ("0" + now.getHours()).slice(-2) + ":" 102 | + ("0" + now.getMinutes()).slice(-2) + ":" 103 | + ("0" + now.getSeconds()).slice(-2); 104 | return nowString; 105 | } 106 | } 107 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/qml.qrc: -------------------------------------------------------------------------------- 1 | 2 | 3 | main.qml 4 | BetterButton.qml 5 | LayoutSection.qml 6 | 7 | 8 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/serverPart.pro: -------------------------------------------------------------------------------- 1 | QT += quick 2 | CONFIG += c++11 3 | 4 | MOC_DIR += generated/mocs 5 | UI_DIR += generated/uis 6 | RCC_DIR += generated/rccs 7 | OBJECTS_DIR += generated/objs 8 | 9 | # The following define makes your compiler emit warnings if you use 10 | # any feature of Qt which as been marked deprecated (the exact warnings 11 | # depend on your compiler). Please consult the documentation of the 12 | # deprecated API in order to know how to port your code away from it. 13 | DEFINES += QT_DEPRECATED_WARNINGS 14 | 15 | # You can also make your code fail to compile if you use deprecated APIs. 16 | # In order to do so, uncomment the following line. 17 | # You can also select to disable deprecated APIs only up to a certain version of Qt. 18 | #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 19 | 20 | SOURCES += main.cpp \ 21 | serverStuff.cpp \ 22 | backend.cpp 23 | 24 | RESOURCES += qml.qrc 25 | 26 | # Additional import path used to resolve QML modules in Qt Creator's code model 27 | QML_IMPORT_PATH = 28 | 29 | # Additional import path used to resolve QML modules just for Qt Quick Designer 30 | QML_DESIGNER_IMPORT_PATH = 31 | 32 | # Default rules for deployment. 33 | qnx: target.path = /tmp/$${TARGET}/bin 34 | else: unix:!android: target.path = /opt/$${TARGET}/bin 35 | !isEmpty(target.path): INSTALLS += target 36 | 37 | HEADERS += \ 38 | serverStuff.h \ 39 | backend.h 40 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/serverStuff.cpp: -------------------------------------------------------------------------------- 1 | #include "serverStuff.h" 2 | 3 | ServerStuff::ServerStuff() : QObject(), m_nNextBlockSize(0) 4 | { 5 | tcpServer = new QTcpServer(); 6 | } 7 | 8 | QList ServerStuff::getClients() 9 | { 10 | return clients; 11 | } 12 | 13 | void ServerStuff::newConnection() 14 | { 15 | QTcpSocket *clientSocket = tcpServer->nextPendingConnection(); 16 | 17 | connect(clientSocket, &QTcpSocket::disconnected, clientSocket, &QTcpSocket::deleteLater); 18 | connect(clientSocket, &QTcpSocket::readyRead, this, &ServerStuff::readClient); 19 | connect(clientSocket, &QTcpSocket::disconnected, this, &ServerStuff::gotDisconnection); 20 | 21 | clients << clientSocket; 22 | 23 | sendToClient(clientSocket, "Reply: connection established"); 24 | } 25 | 26 | void ServerStuff::readClient() 27 | { 28 | QTcpSocket *clientSocket = (QTcpSocket*)sender(); 29 | QDataStream in(clientSocket); 30 | //in.setVersion(QDataStream::Qt_5_10); 31 | for (;;) 32 | { 33 | if (!m_nNextBlockSize) 34 | { 35 | if (clientSocket->bytesAvailable() < sizeof(quint16)) { break; } 36 | in >> m_nNextBlockSize; 37 | } 38 | 39 | if (clientSocket->bytesAvailable() < m_nNextBlockSize) { break; } 40 | QString str; 41 | in >> str; 42 | 43 | emit gotNewMesssage(str); 44 | 45 | m_nNextBlockSize = 0; 46 | 47 | if (sendToClient(clientSocket, QString("Reply: received [%1]").arg(str)) == -1) 48 | { 49 | qDebug() << "Some error occured"; 50 | } 51 | } 52 | } 53 | 54 | void ServerStuff::gotDisconnection() 55 | { 56 | clients.removeAt(clients.indexOf((QTcpSocket*)sender())); 57 | emit smbDisconnected(); 58 | } 59 | 60 | qint64 ServerStuff::sendToClient(QTcpSocket *socket, const QString &str) 61 | { 62 | QByteArray arrBlock; 63 | QDataStream out(&arrBlock, QIODevice::WriteOnly); 64 | //out.setVersion(QDataStream::Qt_5_10); 65 | //out << quint16(0) << QTime::currentTime() << str; 66 | out << quint16(0) << str; 67 | 68 | out.device()->seek(0); 69 | out << quint16(arrBlock.size() - sizeof(quint16)); 70 | 71 | return socket->write(arrBlock); 72 | } 73 | -------------------------------------------------------------------------------- /client-server-qml/serverPart/serverStuff.h: -------------------------------------------------------------------------------- 1 | #ifndef SERVERSTUFF_H 2 | #define SERVERSTUFF_H 3 | 4 | #include 5 | #include 6 | #include 7 | #include 8 | 9 | class ServerStuff : public QObject 10 | { 11 | Q_OBJECT 12 | 13 | public: 14 | ServerStuff(); 15 | QTcpServer *tcpServer; 16 | QList getClients(); 17 | 18 | public slots: 19 | virtual void newConnection(); 20 | void readClient(); 21 | void gotDisconnection(); 22 | qint64 sendToClient(QTcpSocket *socket, const QString &str); 23 | 24 | signals: 25 | void gotNewMesssage(QString msg); 26 | void smbDisconnected(); 27 | 28 | private: 29 | quint16 m_nNextBlockSize; 30 | QList clients; 31 | }; 32 | 33 | #endif // SERVERSTUFF_H 34 | -------------------------------------------------------------------------------- /client-server-widgets/clientPart/clientPart.pro: -------------------------------------------------------------------------------- 1 | QT += core gui network widgets 2 | 3 | TEMPLATE = app 4 | TARGET = client 5 | 6 | MOC_DIR += generated/mocs 7 | UI_DIR += generated/uis 8 | RCC_DIR += generated/rccs 9 | OBJECTS_DIR += generated/objs 10 | 11 | SOURCES += main.cpp\ 12 | mainwindow.cpp \ 13 | clientStuff.cpp 14 | 15 | HEADERS += mainwindow.h \ 16 | clientStuff.h 17 | 18 | FORMS += mainwindow.ui 19 | -------------------------------------------------------------------------------- /client-server-widgets/clientPart/clientStuff.cpp: -------------------------------------------------------------------------------- 1 | #include "clientStuff.h" 2 | 3 | ClientStuff::ClientStuff( 4 | const QString hostAddress, 5 | int portNumber, 6 | QObject *parent 7 | ) : QObject(parent), m_nNextBlockSize(0) 8 | { 9 | status = false; 10 | 11 | host = hostAddress; 12 | port = portNumber; 13 | 14 | tcpSocket = new QTcpSocket(this); 15 | connect(tcpSocket, &QTcpSocket::disconnected, this, &ClientStuff::closeConnection); 16 | 17 | timeoutTimer = new QTimer(); 18 | timeoutTimer->setSingleShot(true); 19 | connect(timeoutTimer, &QTimer::timeout, this, &ClientStuff::connectionTimeout); 20 | } 21 | 22 | void ClientStuff::connect2host() 23 | { 24 | timeoutTimer->start(3000); 25 | 26 | tcpSocket->connectToHost(host, port); 27 | connect(tcpSocket, &QTcpSocket::connected, this, &ClientStuff::connected); 28 | connect(tcpSocket, &QTcpSocket::readyRead, this, &ClientStuff::readyRead); 29 | } 30 | 31 | void ClientStuff::connectionTimeout() 32 | { 33 | //qDebug() << tcpSocket->state(); 34 | if(tcpSocket->state() == QAbstractSocket::ConnectingState) 35 | { 36 | tcpSocket->abort(); 37 | emit tcpSocket->error(QAbstractSocket::SocketTimeoutError); 38 | } 39 | } 40 | 41 | void ClientStuff::connected() 42 | { 43 | status = true; 44 | emit statusChanged(status); 45 | } 46 | 47 | bool ClientStuff::getStatus() {return status;} 48 | 49 | void ClientStuff::readyRead() 50 | { 51 | QDataStream in(tcpSocket); 52 | //in.setVersion(QDataStream::Qt_5_10); 53 | for (;;) 54 | { 55 | if (!m_nNextBlockSize) 56 | { 57 | if (tcpSocket->bytesAvailable() < sizeof(quint16)) { break; } 58 | in >> m_nNextBlockSize; 59 | } 60 | 61 | if (tcpSocket->bytesAvailable() < m_nNextBlockSize) { break; } 62 | 63 | QString str; in >> str; 64 | 65 | if (str == "0") 66 | { 67 | str = "Connection closed"; 68 | closeConnection(); 69 | } 70 | 71 | emit hasReadSome(str); 72 | m_nNextBlockSize = 0; 73 | } 74 | } 75 | 76 | //void ClientStuff::gotDisconnection() 77 | //{ 78 | // status = false; 79 | // emit statusChanged(status); 80 | //} 81 | 82 | void ClientStuff::closeConnection() 83 | { 84 | timeoutTimer->stop(); 85 | 86 | //qDebug() << tcpSocket->state(); 87 | disconnect(tcpSocket, &QTcpSocket::connected, 0, 0); 88 | disconnect(tcpSocket, &QTcpSocket::readyRead, 0, 0); 89 | 90 | bool shouldEmit = false; 91 | switch (tcpSocket->state()) 92 | { 93 | case 0: 94 | tcpSocket->disconnectFromHost(); 95 | shouldEmit = true; 96 | break; 97 | case 2: 98 | tcpSocket->abort(); 99 | shouldEmit = true; 100 | break; 101 | default: 102 | tcpSocket->abort(); 103 | } 104 | 105 | if (shouldEmit) 106 | { 107 | status = false; 108 | emit statusChanged(status); 109 | } 110 | } 111 | -------------------------------------------------------------------------------- /client-server-widgets/clientPart/clientStuff.h: -------------------------------------------------------------------------------- 1 | #ifndef CLIENTSTUFF_H 2 | #define CLIENTSTUFF_H 3 | 4 | #include 5 | #include 6 | #include 7 | #include 8 | 9 | class ClientStuff : public QObject 10 | { 11 | Q_OBJECT 12 | 13 | public: 14 | ClientStuff(const QString hostAddress, int portVal, QObject *parent = 0); 15 | 16 | QTcpSocket *tcpSocket; 17 | bool getStatus(); 18 | 19 | public slots: 20 | void closeConnection(); 21 | void connect2host(); 22 | 23 | signals: 24 | void statusChanged(bool); 25 | void hasReadSome(QString msg); 26 | 27 | private slots: 28 | void readyRead(); 29 | void connected(); 30 | void connectionTimeout(); 31 | 32 | private: 33 | QString host; 34 | int port; 35 | bool status; 36 | quint16 m_nNextBlockSize; 37 | QTimer *timeoutTimer; 38 | }; 39 | 40 | #endif // CLIENTSTUFF_H 41 | -------------------------------------------------------------------------------- /client-server-widgets/clientPart/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include "mainwindow.h" 4 | 5 | int main(int argc, char *argv[]) 6 | { 7 | QApplication a(argc, argv); 8 | 9 | //QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8")); 10 | 11 | MainWindow w; 12 | w.show(); 13 | 14 | return a.exec(); 15 | } 16 | -------------------------------------------------------------------------------- /client-server-widgets/clientPart/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "ui_mainwindow.h" 3 | 4 | MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) 5 | { 6 | ui->setupUi(this); 7 | 8 | ui->pushButton_disconnect->setVisible(false); 9 | 10 | client = new ClientStuff("localhost", 6547); 11 | 12 | setStatus(client->getStatus()); 13 | 14 | connect(client, &ClientStuff::hasReadSome, this, &MainWindow::receivedSomething); 15 | connect(client, &ClientStuff::statusChanged, this, &MainWindow::setStatus); 16 | // FIXME change this connection to the new syntax 17 | connect(client->tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), 18 | this, SLOT(gotError(QAbstractSocket::SocketError))); 19 | } 20 | 21 | MainWindow::~MainWindow() 22 | { 23 | delete client; 24 | delete ui; 25 | } 26 | 27 | void MainWindow::setStatus(bool newStatus) 28 | { 29 | if(newStatus) 30 | { 31 | ui->label_status->setText( 32 | tr("CONNECTED")); 33 | ui->pushButton_connect->setVisible(false); 34 | ui->pushButton_disconnect->setVisible(true); 35 | } 36 | else 37 | { 38 | ui->label_status->setText( 39 | tr("DISCONNECTED")); 40 | ui->pushButton_connect->setVisible(true); 41 | ui->pushButton_disconnect->setVisible(false); 42 | } 43 | } 44 | 45 | void MainWindow::receivedSomething(QString msg) 46 | { 47 | ui->textEdit_log->append(msg); 48 | } 49 | 50 | void MainWindow::gotError(QAbstractSocket::SocketError err) 51 | { 52 | //qDebug() << "got error"; 53 | QString strError = "unknown"; 54 | switch (err) 55 | { 56 | case 0: 57 | strError = "Connection was refused"; 58 | break; 59 | case 1: 60 | strError = "Remote host closed the connection"; 61 | break; 62 | case 2: 63 | strError = "Host address was not found"; 64 | break; 65 | case 5: 66 | strError = "Connection timed out"; 67 | break; 68 | default: 69 | strError = "Unknown error"; 70 | } 71 | 72 | ui->textEdit_log->append(strError); 73 | } 74 | 75 | void MainWindow::on_pushButton_connect_clicked() 76 | { 77 | client->connect2host(); 78 | } 79 | 80 | void MainWindow::on_pushButton_send_clicked() 81 | { 82 | QByteArray arrBlock; 83 | QDataStream out(&arrBlock, QIODevice::WriteOnly); 84 | //out.setVersion(QDataStream::Qt_5_10); 85 | out << quint16(0) << ui->lineEdit_message->text(); 86 | 87 | out.device()->seek(0); 88 | out << quint16(arrBlock.size() - sizeof(quint16)); 89 | 90 | client->tcpSocket->write(arrBlock); 91 | } 92 | 93 | void MainWindow::on_pushButton_disconnect_clicked() 94 | { 95 | client->closeConnection(); 96 | } 97 | -------------------------------------------------------------------------------- /client-server-widgets/clientPart/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | #include "clientStuff.h" 6 | 7 | namespace Ui { class MainWindow; } 8 | 9 | class MainWindow : public QMainWindow 10 | { 11 | Q_OBJECT 12 | 13 | public: 14 | explicit MainWindow(QWidget *parent = 0); 15 | ~MainWindow(); 16 | 17 | public slots: 18 | void setStatus(bool newStatus); 19 | void receivedSomething(QString msg); 20 | void gotError(QAbstractSocket::SocketError err); 21 | 22 | private slots: 23 | void on_pushButton_send_clicked(); 24 | void on_pushButton_connect_clicked(); 25 | void on_pushButton_disconnect_clicked(); 26 | 27 | private: 28 | Ui::MainWindow *ui; 29 | ClientStuff *client; 30 | }; 31 | 32 | #endif // MAINWINDOW_H 33 | -------------------------------------------------------------------------------- /client-server-widgets/clientPart/mainwindow.ui: -------------------------------------------------------------------------------- 1 | 2 | 3 | MainWindow 4 | 5 | 6 | 7 | 0 8 | 0 9 | 539 10 | 355 11 | 12 | 13 | 14 | Client 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | Send this: 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 13 40 | 75 41 | true 42 | 43 | 44 | 45 | color: rgb(0, 0, 255); 46 | 47 | 48 | Connect to server 49 | 50 | 51 | 52 | 53 | 54 | 55 | true 56 | 57 | 58 | 59 | 13 60 | 75 61 | true 62 | 63 | 64 | 65 | color: rgb(255, 0, 0); 66 | 67 | 68 | Disconnect from server 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 9999 77 | 16777215 78 | 79 | 80 | 81 | 82 | 13 83 | 75 84 | true 85 | 86 | 87 | 88 | QFrame::Box 89 | 90 | 91 | QFrame::Sunken 92 | 93 | 94 | status 95 | 96 | 97 | Qt::AlignCenter 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | -------------------------------------------------------------------------------- /client-server-widgets/serverPart/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include "mainwindow.h" 4 | 5 | int main(int argc, char *argv[]) 6 | { 7 | QApplication a(argc, argv); 8 | 9 | //QTextCodec::setCodecForTr(QTextCodec::codecForName("UTF-8")); 10 | 11 | MainWindow w; 12 | w.show(); 13 | 14 | return a.exec(); 15 | } 16 | -------------------------------------------------------------------------------- /client-server-widgets/serverPart/mainwindow.cpp: -------------------------------------------------------------------------------- 1 | #include "mainwindow.h" 2 | #include "ui_mainwindow.h" 3 | 4 | MainWindow::MainWindow(QWidget *parent) : 5 | QMainWindow(parent), 6 | ui(new Ui::MainWindow) 7 | { 8 | ui->setupUi(this); 9 | 10 | server = new ServerStuff(this); 11 | connect(server, &ServerStuff::gotNewMesssage, 12 | this, &MainWindow::gotNewMesssage); 13 | connect(server->tcpServer, &QTcpServer::newConnection, 14 | this, &MainWindow::smbConnectedToServer); 15 | connect(server, &ServerStuff::smbDisconnected, 16 | this, &MainWindow::smbDisconnectedFromServer); 17 | } 18 | 19 | MainWindow::~MainWindow() 20 | { 21 | delete server; 22 | delete ui; 23 | } 24 | 25 | void MainWindow::on_pushButton_startServer_clicked() 26 | { 27 | if (!server->tcpServer->listen(QHostAddress::Any, 6547)) 28 | { 29 | ui->textEdit_log->append(tr("Error! The port is taken by some other service.")); 30 | return; 31 | } 32 | connect(server->tcpServer, &QTcpServer::newConnection, server, &ServerStuff::newConnection); 33 | ui->textEdit_log->append(tr("Server started, port is openned.")); 34 | } 35 | 36 | void MainWindow::on_pushButton_stopServer_clicked() 37 | { 38 | if(server->tcpServer->isListening()) 39 | { 40 | disconnect(server->tcpServer, &QTcpServer::newConnection, server, &ServerStuff::newConnection); 41 | 42 | QList clients = server->getClients(); 43 | for(int i = 0; i < clients.count(); i++) 44 | { 45 | //server->sendToClient(clients.at(i), "Connection closed"); 46 | server->sendToClient(clients.at(i), "0"); 47 | } 48 | 49 | server->tcpServer->close(); 50 | ui->textEdit_log->append(tr("Server stopped, post is closed")); 51 | } 52 | else 53 | { 54 | ui->textEdit_log->append(tr("Error! Server was not running")); 55 | } 56 | } 57 | 58 | void MainWindow::on_pushButton_testConn_clicked() 59 | { 60 | if(server->tcpServer->isListening()) 61 | { 62 | ui->textEdit_log->append( 63 | QString("%1 %2") 64 | .arg("Server is listening, number of connected clients:") 65 | .arg(QString::number(server->getClients().count())) 66 | ); 67 | } 68 | else 69 | { 70 | ui->textEdit_log->append( 71 | QString("%1 %2") 72 | .arg("Server is not listening, number of connected clients:") 73 | .arg(QString::number(server->getClients().count())) 74 | ); 75 | } 76 | } 77 | 78 | void MainWindow::smbConnectedToServer() 79 | { 80 | ui->textEdit_log->append(tr("Somebody has connected")); 81 | } 82 | 83 | void MainWindow::smbDisconnectedFromServer() 84 | { 85 | ui->textEdit_log->append(tr("Somebody has disconnected")); 86 | } 87 | 88 | void MainWindow::gotNewMesssage(QString msg) 89 | { 90 | ui->textEdit_log->append(QString("New message: %1").arg(msg)); 91 | } 92 | -------------------------------------------------------------------------------- /client-server-widgets/serverPart/mainwindow.h: -------------------------------------------------------------------------------- 1 | #ifndef MAINWINDOW_H 2 | #define MAINWINDOW_H 3 | 4 | #include 5 | #include 6 | #include "serverStuff.h" 7 | 8 | namespace Ui { 9 | class MainWindow; 10 | } 11 | 12 | class MainWindow : public QMainWindow 13 | { 14 | Q_OBJECT 15 | 16 | public: 17 | explicit MainWindow(QWidget *parent = 0); 18 | ~MainWindow(); 19 | 20 | private slots: 21 | void on_pushButton_stopServer_clicked(); 22 | void on_pushButton_startServer_clicked(); 23 | void on_pushButton_testConn_clicked(); 24 | void smbConnectedToServer(); 25 | void smbDisconnectedFromServer(); 26 | void gotNewMesssage(QString msg); 27 | 28 | private: 29 | Ui::MainWindow *ui; 30 | ServerStuff *server; 31 | }; 32 | 33 | #endif // MAINWINDOW_H 34 | -------------------------------------------------------------------------------- /client-server-widgets/serverPart/mainwindow.ui: -------------------------------------------------------------------------------- 1 | 2 | 3 | MainWindow 4 | 5 | 6 | 7 | 0 8 | 0 9 | 402 10 | 282 11 | 12 | 13 | 14 | Server 15 | 16 | 17 | 18 | 19 | 5 20 | 21 | 22 | 5 23 | 24 | 25 | 5 26 | 27 | 28 | 5 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 0 37 | 0 38 | 39 | 40 | 41 | 42 | 13 43 | 75 44 | true 45 | 46 | 47 | 48 | color: rgb(0, 170, 0); 49 | 50 | 51 | Start server 52 | 53 | 54 | 55 | 56 | 57 | 58 | true 59 | 60 | 61 | 62 | 13 63 | 75 64 | true 65 | 66 | 67 | 68 | color: rgb(255, 0, 0); 69 | 70 | 71 | Stop server 72 | 73 | 74 | false 75 | 76 | 77 | false 78 | 79 | 80 | false 81 | 82 | 83 | false 84 | 85 | 86 | false 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | Test connection 99 | 100 | 101 | 102 | 103 | 104 | 105 | Qt::Horizontal 106 | 107 | 108 | 109 | 40 110 | 20 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | 125 | 126 | -------------------------------------------------------------------------------- /client-server-widgets/serverPart/serverPart.pro: -------------------------------------------------------------------------------- 1 | QT += core gui network widgets 2 | 3 | TEMPLATE = app 4 | TARGET = server 5 | 6 | MOC_DIR += generated/mocs 7 | UI_DIR += generated/uis 8 | RCC_DIR += generated/rccs 9 | OBJECTS_DIR += generated/objs 10 | 11 | SOURCES += \ 12 | main.cpp \ 13 | mainwindow.cpp \ 14 | serverStuff.cpp 15 | 16 | HEADERS += \ 17 | mainwindow.h \ 18 | serverStuff.h 19 | 20 | FORMS += \ 21 | mainwindow.ui 22 | -------------------------------------------------------------------------------- /client-server-widgets/serverPart/serverStuff.cpp: -------------------------------------------------------------------------------- 1 | #include "serverStuff.h" 2 | 3 | ServerStuff::ServerStuff(QObject *pwgt) : QObject(pwgt), m_nNextBlockSize(0) 4 | { 5 | tcpServer = new QTcpServer(this); 6 | } 7 | 8 | QList ServerStuff::getClients() 9 | { 10 | return clients; 11 | } 12 | 13 | void ServerStuff::newConnection() 14 | { 15 | QTcpSocket *clientSocket = tcpServer->nextPendingConnection(); 16 | 17 | connect(clientSocket, &QTcpSocket::disconnected, clientSocket, &QTcpSocket::deleteLater); 18 | connect(clientSocket, &QTcpSocket::readyRead, this, &ServerStuff::readClient); 19 | connect(clientSocket, &QTcpSocket::disconnected, this, &ServerStuff::gotDisconnection); 20 | 21 | clients << clientSocket; 22 | 23 | sendToClient(clientSocket, "Reply: connection established"); 24 | } 25 | 26 | void ServerStuff::readClient() 27 | { 28 | QTcpSocket *clientSocket = (QTcpSocket*)sender(); 29 | 30 | QDataStream in(clientSocket); 31 | //in.setVersion(QDataStream::Qt_5_10); 32 | for (;;) 33 | { 34 | if (!m_nNextBlockSize) { 35 | if (clientSocket->bytesAvailable() < sizeof(quint16)) { break; } 36 | in >> m_nNextBlockSize; 37 | } 38 | 39 | if (clientSocket->bytesAvailable() < m_nNextBlockSize) { break; } 40 | QString str; 41 | in >> str; 42 | 43 | emit gotNewMesssage(str); 44 | 45 | m_nNextBlockSize = 0; 46 | 47 | if (sendToClient(clientSocket, QString("Reply: received [%1]").arg(str)) == -1) 48 | { 49 | qDebug() << "Some error occured"; 50 | } 51 | } 52 | } 53 | 54 | void ServerStuff::gotDisconnection() 55 | { 56 | clients.removeAt(clients.indexOf((QTcpSocket*)sender())); 57 | emit smbDisconnected(); 58 | } 59 | 60 | qint64 ServerStuff::sendToClient(QTcpSocket* socket, const QString& str) 61 | { 62 | QByteArray arrBlock; 63 | QDataStream out(&arrBlock, QIODevice::WriteOnly); 64 | //out.setVersion(QDataStream::Qt_5_10); 65 | //out << quint16(0) << QTime::currentTime() << str; 66 | out << quint16(0) << str; 67 | 68 | out.device()->seek(0); 69 | out << quint16(arrBlock.size() - sizeof(quint16)); 70 | 71 | return socket->write(arrBlock); 72 | } 73 | -------------------------------------------------------------------------------- /client-server-widgets/serverPart/serverStuff.h: -------------------------------------------------------------------------------- 1 | #ifndef SERVERSTUFF_H 2 | #define SERVERSTUFF_H 3 | 4 | #include 5 | #include 6 | #include 7 | #include 8 | 9 | class ServerStuff : public QObject 10 | { 11 | Q_OBJECT 12 | 13 | public: 14 | ServerStuff(QObject *pwgt); 15 | QTcpServer *tcpServer; 16 | QList getClients(); 17 | 18 | public slots: 19 | virtual void newConnection(); 20 | void readClient(); 21 | void gotDisconnection(); 22 | qint64 sendToClient(QTcpSocket *socket, const QString &str); 23 | 24 | signals: 25 | void gotNewMesssage(QString msg); 26 | void smbDisconnected(); 27 | 28 | private: 29 | quint16 m_nNextBlockSize; 30 | QList clients; 31 | }; 32 | 33 | #endif // SERVERSTUFF_H 34 | -------------------------------------------------------------------------------- /img/qml-client-server.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/retifrav/qt-client-server/8c0aeb163035291ffd68565a862da801ca65abd9/img/qml-client-server.png -------------------------------------------------------------------------------- /img/widgets-client-server.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/retifrav/qt-client-server/8c0aeb163035291ffd68565a862da801ca65abd9/img/widgets-client-server.png --------------------------------------------------------------------------------