refactor(compression): Unify compression APIs with enhanced infrastructure

Complete refactor of QGC compression system using libarchive as the single
backend for all archive operations (ZIP, TAR, GZIP, etc.).

Key changes:
- Unified QGCCompression API with decompression-only support
- QGCCompressionJob for async operations with progress tracking
- QGClibarchive backend replacing multiple format-specific handlers
- QGCArchiveModel for QML-friendly archive browsing
- QGCArchiveWatcher for monitoring archive directories

Enhanced file download infrastructure:
- QGCFileDownload with progress, retry logic, and range requests
- QGCCachedFileDownload with ETag/Last-Modified validation
- Concurrent download management
- Removed http_parser dependency (inline HTTP status handling)

Includes comprehensive test coverage for compression and downloads.

Author: HTRamsey

.github/build-config.json

@@ -13,7 +13,7 @@
   "ndk_full_version": "27.2.12479018",
   "ndk_version": "r27c",
   "qt_minimum_version": "6.10.0",
-  "qt_modules": "qtcharts qtlocation qtpositioning qtspeech qt5compat qtmultimedia qtserialport qtimageformats qtshadertools qtconnectivity qtquick3d qtsensors qtscxml",
+  "qt_modules": "qtcharts qtlocation qtpositioning qtspeech qt5compat qtmultimedia qtserialport qtimageformats qtshadertools qtconnectivity qtquick3d qtsensors qtscxml qthttpserver",
   "qt_version": "6.10.1",
   "xcode_ios_version": "latest-stable",
   "xcode_version": "16.x"

CMakeLists.txt

@@ -161,6 +161,7 @@ find_package(Qt6
         Core
         Core5Compat
         Gui
+        HttpServer
         LinguistTools
         Location
         LocationPrivate

src/Camera/VehicleCameraControl.cc

@@ -6,8 +6,9 @@
 #include "VideoManager.h"
 #include "QGCCameraManager.h"
 #include "FTPManager.h"
-#include "QGCLZMA.h"
+#include "QGCCompression.h"
 #include "QGCCorePlugin.h"
+#include "QGCFileHelper.h"
 #include "Vehicle.h"
 #include "LinkInterface.h"
 #include "MAVLinkProtocol.h"
@@ -20,9 +21,10 @@
 #include <QtXml/QDomDocument>
 #include <QtXml/QDomNodeList>
 #include <QtQml/QQmlEngine>
-#include <QtNetwork/QNetworkProxy>
 #include <QtNetwork/QNetworkReply>
 
+#include "QGCNetworkHelper.h"
+
 //-----------------------------------------------------------------------------
 QGCCameraOptionExclusion::QGCCameraOptionExclusion(QObject* parent, QString param_, QString value_, QStringList exclusions_)
     : QObject(parent)
@@ -1574,9 +1576,9 @@ VehicleCameraControl::handleCaptureStatus(const mavlink_camera_capture_status_t&
     //-- Time Lapse
     if(photoCaptureStatus() == PHOTO_CAPTURE_INTERVAL_IDLE || photoCaptureStatus() == PHOTO_CAPTURE_INTERVAL_IN_PROGRESS) {
         //-- Capture local image as well
-        QString photoPath = SettingsManager::instance()->appSettings()->savePath()->rawValue().toString() + QStringLiteral("/Photo");
-        QDir().mkpath(photoPath);
-        photoPath += "/" + QDateTime::currentDateTime().toString("yyyy-MM-dd_hh.mm.ss.zzz") + ".jpg";
+        const QString photoDir = SettingsManager::instance()->appSettings()->savePath()->rawValue().toString() + QStringLiteral("/Photo");
+        QGCFileHelper::ensureDirectoryExists(photoDir);
+        const QString photoPath = photoDir + "/" + QDateTime::currentDateTime().toString("yyyy-MM-dd_hh.mm.ss.zzz") + ".jpg";
         VideoManager::instance()->grabImage(photoPath);
     }
 }
@@ -2129,18 +2131,14 @@ VehicleCameraControl::_httpRequest(const QString &url)
     if(!_netManager) {
         _netManager = new QNetworkAccessManager(this);
     }
-    QNetworkProxy savedProxy = _netManager->proxy();
-    QNetworkProxy tempProxy;
-    tempProxy.setType(QNetworkProxy::DefaultProxy);
-    _netManager->setProxy(tempProxy);
+    QGCNetworkHelper::configureProxy(_netManager);
     QNetworkRequest request(QUrl::fromUserInput(url));
     request.setAttribute(QNetworkRequest::RedirectPolicyAttribute, true);
     QSslConfiguration conf = request.sslConfiguration();
     conf.setPeerVerifyMode(QSslSocket::VerifyNone);
     request.setSslConfiguration(conf);
     QNetworkReply* reply = _netManager->get(request);
     connect(reply, &QNetworkReply::finished,  this, &VehicleCameraControl::_downloadFinished);
-    _netManager->setProxy(savedProxy);
 }
 
 //-----------------------------------------------------------------------------
@@ -2174,16 +2172,9 @@ void VehicleCameraControl::_ftpDownloadComplete(const QString& fileName, const Q
 
     disconnect(_vehicle->ftpManager(), &FTPManager::downloadComplete, this, &VehicleCameraControl::_ftpDownloadComplete);
 
-    QString outputFileName = fileName;
-
-    if (fileName.endsWith(".lzma", Qt::CaseInsensitive) || fileName.endsWith(".xz", Qt::CaseInsensitive)) {
-        outputFileName = fileName.left(fileName.lastIndexOf("."));
-        if (QGCLZMA::inflateLZMAFile(fileName, outputFileName)) {
-            QFile(fileName).remove();
-        } else {
-            qCWarning(CameraControlLog) << "Inflate of compressed xml failed" << fileName;
-            outputFileName.clear();
-        }
+    QString outputFileName = QGCCompression::decompressIfNeeded(fileName);
+    if (outputFileName.isEmpty()) {
+        qCWarning(CameraControlLog) << "Inflate of compressed xml failed" << fileName;
     }
 
     QFile xmlFile(outputFileName);

src/Comms/BluetoothLink.cc

@@ -1,7 +1,7 @@
 #include "BluetoothLink.h"
 
-#include "DeviceInfo.h"
 #include "QGCLoggingCategory.h"
+#include "QGCNetworkHelper.h"
 
 #include <QtCore/QCoreApplication>
 #include <QtCore/QPermissions>
@@ -93,7 +93,7 @@ void BluetoothConfiguration::saveSettings(QSettings &settings, const QString &ro
 
 QString BluetoothConfiguration::settingsTitle() const
 {
-    if (QGCDeviceInfo::isBluetoothAvailable()) {
+    if (QGCNetworkHelper::isBluetoothAvailable()) {
         return tr("Bluetooth Link Settings");
     }
 

src/Comms/LinkManager.cc

@@ -1,6 +1,6 @@
 #include "LinkManager.h"
-#include "DeviceInfo.h"
 #include "LogReplayLink.h"
+#include "QGCNetworkHelper.h"
 #include "MAVLinkProtocol.h"
 #include "MultiVehicleManager.h"
 #include "QGCApplication.h"
@@ -697,7 +697,7 @@ void LinkManager::_removeConfiguration(const LinkConfiguration *config)
 
 bool LinkManager::isBluetoothAvailable()
 {
-    return QGCDeviceInfo::isBluetoothAvailable();
+    return QGCNetworkHelper::isBluetoothAvailable();
 }
 
 bool LinkManager::containsLink(const LinkInterface *link)

src/Comms/MAVLinkProtocol.cc

@@ -1,16 +1,17 @@
 #include "MAVLinkProtocol.h"
+#include "AppSettings.h"
 #include "LinkManager.h"
+#include "MavlinkSettings.h"
 #include "MultiVehicleManager.h"
 #include "QGCApplication.h"
+#include "QGCFileHelper.h"
 #include "QGCLoggingCategory.h"
-#include "QGCTemporaryFile.h"
-#include "SettingsManager.h"
-#include "MavlinkSettings.h"
-#include "AppSettings.h"
 #include "QmlObjectListModel.h"
+#include "SettingsManager.h"
 
 #include <QtCore/QApplicationStatic>
 #include <QtCore/QDir>
+#include <QtCore/QFile>
 #include <QtCore/QFileInfo>
 #include <QtCore/QMetaType>
 #include <QtCore/QSettings>
@@ -23,7 +24,7 @@ Q_APPLICATION_STATIC(MAVLinkProtocol, _mavlinkProtocolInstance);
 
 MAVLinkProtocol::MAVLinkProtocol(QObject *parent)
     : QObject(parent)
-    , _tempLogFile(new QGCTemporaryFile(QStringLiteral("%2.%3").arg(_tempLogFileTemplate, _logFileExtension), this))
+    , _tempLogFile(new QFile(this))
 {
     qCDebug(MAVLinkProtocolLog) << this;
 }
@@ -300,8 +301,20 @@ void MAVLinkProtocol::_startLogging()
         return;
     }
 
-    if (!_tempLogFile->open()) {
-        const QString message = QStringLiteral("Opening Flight Data file for writing failed. Unable to write to %1. Please choose a different file location.").arg(_tempLogFile->fileName());
+    // Generate unique temp file path for this logging session
+    const QString logPath = QGCFileHelper::uniqueTempPath(
+        QStringLiteral("%1.%2").arg(_tempLogFileTemplate, _logFileExtension));
+    if (logPath.isEmpty()) {
+        qCWarning(MAVLinkProtocolLog) << "Failed to generate temp log path";
+        _logSuspendError = true;
+        return;
+    }
+
+    _tempLogFile->setFileName(logPath);
+    if (!_tempLogFile->open(QIODevice::WriteOnly)) {
+        const QString message = QStringLiteral("Opening Flight Data file for writing failed. "
+            "Unable to write to %1. Please choose a different file location.")
+            .arg(_tempLogFile->fileName());
         qgcApp()->showAppMessage(message, getName());
         _closeLogFile();
         _logSuspendError = true;

src/Comms/MAVLinkProtocol.h

@@ -8,7 +8,7 @@
 #include "LinkInterface.h"
 #include "MAVLinkLib.h"
 
-class QGCTemporaryFile;
+class QFile;
 
 Q_DECLARE_LOGGING_CATEGORY(MAVLinkProtocolLog)
 
@@ -93,7 +93,7 @@ private slots:
     void _saveTelemetryLog(const QString &tempLogfile);
     bool _checkTelemetrySavePath();
 
-    QGCTemporaryFile * const _tempLogFile = nullptr;
+    QFile *_tempLogFile = nullptr;
 
     bool _logSuspendError = false;  ///< true: Logging suspended due to error
     bool _logSuspendReplay = false; ///< true: Logging suspended due to replay

src/Comms/MockLink/MockLinkFTP.cc

@@ -1,7 +1,9 @@
 #include "MockLinkFTP.h"
 #include "MockLink.h"
 #include "QGCLoggingCategory.h"
-#include "QGCTemporaryFile.h"
+
+#include <QtCore/QDir>
+#include <QtCore/QTemporaryFile>
 
 QGC_LOGGING_CATEGORY(MockLinkFTPLog, "Comms.MockLink.MockLinkFTP")
 
@@ -553,11 +555,12 @@ uint16_t MockLinkFTP::_nextSeqNumber(uint16_t seqNumber) const
 
 QString MockLinkFTP::_createTestTempFile(int size)
 {
-    QGCTemporaryFile tmpFile("MockLinkFTPTestCase");
+    QTemporaryFile tmpFile(QDir::tempPath() + QStringLiteral("/MockLinkFTPTestCaseXXXXXX"));
+    tmpFile.setAutoRemove(false);
 
-    if (tmpFile.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
+    if (tmpFile.open()) {
         for (int i = 0; i < size; i++) {
-            (void) tmpFile.write(QByteArray(1, i % 255));
+            (void) tmpFile.write(QByteArray(1, static_cast<char>(i % 255)));
         }
         tmpFile.close();
     }

src/Comms/TCPLink.cc

@@ -1,6 +1,6 @@
 #include "TCPLink.h"
-#include "DeviceInfo.h"
 #include "QGCLoggingCategory.h"
+#include "QGCNetworkHelper.h"
 
 #include <QtCore/QThread>
 #include <QtCore/QTimer>
@@ -337,5 +337,5 @@ void TCPLink::_writeBytes(const QByteArray& bytes)
 
 bool TCPLink::isSecureConnection() const
 {
-    return QGCDeviceInfo::isNetworkEthernet();
+    return QGCNetworkHelper::isNetworkEthernet();
 }

src/Comms/UDPLink.cc

@@ -1,7 +1,7 @@
 #include "UDPLink.h"
 #include "AutoConnectSettings.h"
-#include "DeviceInfo.h"
 #include "QGCLoggingCategory.h"
+#include "QGCNetworkHelper.h"
 #include "SettingsManager.h"
 
 #include <QtCore/QMutexLocker>
@@ -642,5 +642,5 @@ void UDPLink::_writeBytes(const QByteArray& bytes)
 
 bool UDPLink::isSecureConnection() const
 {
-    return QGCDeviceInfo::isNetworkEthernet();
+    return QGCNetworkHelper::isNetworkEthernet();
 }