Quick Secure CoAP Client Example

 // Copyright (C) 2019 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

 import QtQuick 2.13
 import QtQuick.Layouts 1.13
 import QtQuick.Controls 2.13
 import QtQuick.Window 2.13
 import CoapSecureClient 1.0
 import qtcoap.example.namespace 1.0

 Window {
     visible: true
     width: 480
     height: 640
     title: qsTr("Qt Quick Secure CoAP Client")

     CoapSecureClient {
         id: client
         onFinished: {
             outputView.text = result;
             statusLabel.text = "";
             disconnectButton.enabled = true;
         }
     }

     GridLayout {
         anchors.fill: parent
         anchors.margins: 10
         columns: 2

         Label {
             text: qsTr("Host:")
         }
         ComboBox {
             id: hostComboBox
             editable: true
             model: hostsModel
             Layout.fillWidth: true
         }

         Label {
             text: qsTr("Port:")
         }
         TextField {
             id: portField
             text: "5684"
             placeholderText: qsTr("<Port>")
             inputMethodHints: Qt.ImhDigitsOnly
             Layout.preferredWidth: 80
         }

         Label {
             text: qsTr("Resource:")
         }
         TextField {
             id: resourceField
             placeholderText: qsTr("<Resource Path>")
             inputMethodHints: Qt.ImhUrlCharactersOnly
             selectByMouse: true
             Layout.fillWidth: true
         }

         Label {
             text: qsTr("Security Mode:")
         }
         ButtonGroup {
             id: securityModeGroup
             onClicked: {
                 if (securityModeGroup.checkedButton === preSharedMode)
                     client.setSecurityMode(QtCoap.SecurityMode.PreSharedKey);
                 else
                     client.setSecurityMode(QtCoap.SecurityMode.Certificate);
             }
         }
         RowLayout {
             RadioButton {
                 id: preSharedMode
                 text: qsTr("Pre-shared Key")
                 ButtonGroup.group: securityModeGroup
             }
             RadioButton {
                 id: certificateMode
                 text: qsTr("X.509 Certificate")
                 ButtonGroup.group: securityModeGroup
             }
         }

         RowLayout {
             enabled: securityModeGroup.checkedButton === preSharedMode
             Layout.columnSpan: 2

             Label {
                 text: qsTr("Key")
             }
             TextField {
                 id: pskField
                 placeholderText: qsTr("<Pre-shared Key>")
                 Layout.fillWidth: true
             }

             Label {
                 text: qsTr("Identity")
             }
             TextField {
                 id: identityField
                 placeholderText: qsTr("<Identity>")
                 Layout.fillWidth: true
             }
         }

         FilePicker {
             id: localCertificatePicker
             dialogText: "Local Certificate"
             enabled: securityModeGroup.checkedButton === certificateMode
             Layout.columnSpan: 2
             Layout.fillWidth: true
         }

         FilePicker {
             id: caCertificatePicker
             dialogText: "CA Certificate"
             enabled: securityModeGroup.checkedButton === certificateMode
             Layout.columnSpan: 2
             Layout.fillWidth: true
         }

         FilePicker {
             id: privateKeyPicker
             dialogText: "Private Key"
             enabled: securityModeGroup.checkedButton === certificateMode
             Layout.columnSpan: 2
             Layout.fillWidth: true
         }

         Button {
             id: requestButton
             text: qsTr("Send Request")
             enabled: securityModeGroup.checkState !== Qt.Unchecked

             onClicked: {
                 outputView.text = "";
                 if (securityModeGroup.checkedButton === preSharedMode)
                     client.setSecurityConfiguration(pskField.text, identityField.text);
                 else
                     client.setSecurityConfiguration(localCertificatePicker.selectedFile,
                                                     caCertificatePicker.selectedFile,
                                                     privateKeyPicker.selectedFile);

                 client.sendGetRequest(hostComboBox.editText, resourceField.text,
                                       parseInt(portField.text));

                 statusLabel.text = qsTr("Sending request to %1%2...").arg(hostComboBox.editText)
                                                                      .arg(resourceField.text);
             }
         }

         Button {
             id: disconnectButton
             text: qsTr("Disconnect")
             enabled: false

             onClicked: {
                 client.disconnect();
                 statusLabel.text = qsTr("Disconnected.");
                 outputView.text = "";
                 disconnectButton.enabled = false;
             }
         }

         TextArea {
             id: outputView
             placeholderText: qsTr("<Client Output>")
             background: Rectangle {
                 border.color: "gray"
             }
             Layout.columnSpan: 2
             Layout.fillHeight: true
             Layout.fillWidth: true
         }
         Label {
             id: statusLabel
             Layout.columnSpan: 2
             Layout.fillWidth: true
         }
     }
 }