Add Dropbox

Fixes #1679

CMakeLists.txt

@@ -295,12 +295,6 @@ if(UNIX AND NOT APPLE)
   )
 endif()
 
-if(MSVC)
-  optional_component(WINDOWS_MEDIA_CONTROLS ON "Windows Media Transport Controls"
-    DEPENDS "MSVC compiler" MSVC
-  )
-endif()
-
 optional_component(SONGFINGERPRINTING ON "Song fingerprinting and tracking"
   DEPENDS "chromaprint" CHROMAPRINT_FOUND
 )
@@ -385,6 +379,13 @@ optional_component(STREAMTAGREADER ON "Stream tagreader"
 
 optional_component(DISCORD_RPC ON "Discord Rich Presence"
   DEPENDS "RapidJSON" RapidJSON_FOUND
+
+optional_component(DROPBOX ON "Streaming: Dropbox"
+  DEPENDS "Stream tagreader" HAVE_STREAMTAGREADER
+)
+
+optional_component(ONEDRIVE ON "Streaming: OneDrive"
+  DEPENDS "Stream tagreader" HAVE_STREAMTAGREADER
 )
 
 if(HAVE_SONGFINGERPRINTING OR HAVE_MUSICBRAINZ)
@@ -782,6 +783,7 @@ set(SOURCES
   src/streaming/streamingcollectionviewcontainer.cpp
   src/streaming/streamingsearchview.cpp
   src/streaming/streamsongmimedata.cpp
+  src/streaming/cloudstoragestreamingservice.cpp
 
   src/radios/radioservices.cpp
   src/radios/radiobackend.cpp
@@ -1078,6 +1080,7 @@ set(HEADERS
   src/streaming/streamingtabsview.h
   src/streaming/streamingcollectionview.h
   src/streaming/streamingcollectionviewcontainer.h
+  src/streaming/cloudstoragestreamingservice.h
 
   src/radios/radioservices.h
   src/radios/radiobackend.h
@@ -1300,7 +1303,6 @@ endif()
 optional_source(HAVE_ALSA SOURCES src/engine/alsadevicefinder.cpp src/engine/alsapcmdevicefinder.cpp)
 optional_source(HAVE_PULSE SOURCES src/engine/pulsedevicefinder.cpp)
 optional_source(MSVC SOURCES src/engine/uwpdevicefinder.cpp src/engine/asiodevicefinder.cpp)
-optional_source(HAVE_WINDOWS_MEDIA_CONTROLS SOURCES src/core/windowsmediacontroller.cpp HEADERS src/core/windowsmediacontroller.h)
 optional_source(HAVE_CHROMAPRINT SOURCES src/engine/chromaprinter.cpp)
 
 optional_source(HAVE_MUSICBRAINZ
@@ -1487,6 +1489,25 @@ optional_source(HAVE_QOBUZ
     src/settings/qobuzsettingspage.ui
 )
 
+optional_source(HAVE_DROPBOX
+  SOURCES
+    src/dropbox/dropboxservice.cpp
+    src/dropbox/dropboxurlhandler.cpp
+    src/dropbox/dropboxbaserequest.cpp
+    src/dropbox/dropboxsongsrequest.cpp
+    src/dropbox/dropboxstreamurlrequest.cpp
+    src/settings/dropboxsettingspage.cpp
+  HEADERS
+    src/dropbox/dropboxservice.h
+    src/dropbox/dropboxurlhandler.h
+    src/dropbox/dropboxbaserequest.h
+    src/dropbox/dropboxsongsrequest.h
+    src/dropbox/dropboxstreamurlrequest.h
+    src/settings/dropboxsettingspage.h
+  UI
+    src/settings/dropboxsettingspage.ui
+)
+
 qt_wrap_cpp(SOURCES ${HEADERS})
 qt_wrap_ui(SOURCES ${UI})
 qt_add_resources(SOURCES data/data.qrc data/icons.qrc)

data/icons.qrc

@@ -98,6 +98,7 @@
         <file>icons/128x128/somafm.png</file>
         <file>icons/128x128/radioparadise.png</file>
         <file>icons/128x128/musicbrainz.png</file>
+        <file>icons/128x128/dropbox.png</file>
         <file>icons/64x64/albums.png</file>
         <file>icons/64x64/alsa.png</file>
         <file>icons/64x64/application-exit.png</file>
@@ -197,6 +198,7 @@
         <file>icons/64x64/somafm.png</file>
         <file>icons/64x64/radioparadise.png</file>
         <file>icons/64x64/musicbrainz.png</file>
+        <file>icons/64x64/dropbox.png</file>
         <file>icons/48x48/albums.png</file>
         <file>icons/48x48/alsa.png</file>
         <file>icons/48x48/application-exit.png</file>
@@ -300,6 +302,7 @@
         <file>icons/48x48/somafm.png</file>
         <file>icons/48x48/radioparadise.png</file>
         <file>icons/48x48/musicbrainz.png</file>
+        <file>icons/48x48/dropbox.png</file>
         <file>icons/32x32/albums.png</file>
         <file>icons/32x32/alsa.png</file>
         <file>icons/32x32/application-exit.png</file>
@@ -403,6 +406,7 @@
         <file>icons/32x32/somafm.png</file>
         <file>icons/32x32/radioparadise.png</file>
         <file>icons/32x32/musicbrainz.png</file>
+        <file>icons/32x32/dropbox.png</file>
         <file>icons/22x22/albums.png</file>
         <file>icons/22x22/alsa.png</file>
         <file>icons/22x22/application-exit.png</file>
@@ -506,5 +510,6 @@
         <file>icons/22x22/somafm.png</file>
         <file>icons/22x22/radioparadise.png</file>
         <file>icons/22x22/musicbrainz.png</file>
+        <file>icons/22x22/dropbox.png</file>
     </qresource>
 </RCC>

data/schema/schema-22.sql

@@ -0,0 +1,82 @@
+CREATE TABLE IF NOT EXISTS dropbox_songs (
+
+  title TEXT,
+  album TEXT,
+  artist TEXT,
+  albumartist TEXT,
+  track INTEGER NOT NULL DEFAULT -1,
+  disc INTEGER NOT NULL DEFAULT -1,
+  year INTEGER NOT NULL DEFAULT -1,
+  originalyear INTEGER NOT NULL DEFAULT -1,
+  genre TEXT,
+  compilation INTEGER NOT NULL DEFAULT 0,
+  composer TEXT,
+  performer TEXT,
+  grouping TEXT,
+  comment TEXT,
+  lyrics TEXT,
+
+  artist_id TEXT,
+  album_id TEXT,
+  song_id TEXT,
+
+  beginning INTEGER NOT NULL DEFAULT 0,
+  length INTEGER NOT NULL DEFAULT 0,
+
+  bitrate INTEGER NOT NULL DEFAULT -1,
+  samplerate INTEGER NOT NULL DEFAULT -1,
+  bitdepth INTEGER NOT NULL DEFAULT -1,
+
+  source INTEGER NOT NULL DEFAULT 0,
+  directory_id INTEGER NOT NULL DEFAULT -1,
+  url TEXT NOT NULL,
+  filetype INTEGER NOT NULL DEFAULT 0,
+  filesize INTEGER NOT NULL DEFAULT -1,
+  mtime INTEGER NOT NULL DEFAULT -1,
+  ctime INTEGER NOT NULL DEFAULT -1,
+  unavailable INTEGER DEFAULT 0,
+
+  fingerprint TEXT,
+
+  playcount INTEGER NOT NULL DEFAULT 0,
+  skipcount INTEGER NOT NULL DEFAULT 0,
+  lastplayed INTEGER NOT NULL DEFAULT -1,
+  lastseen INTEGER NOT NULL DEFAULT -1,
+
+  compilation_detected INTEGER DEFAULT 0,
+  compilation_on INTEGER NOT NULL DEFAULT 0,
+  compilation_off INTEGER NOT NULL DEFAULT 0,
+  compilation_effective INTEGER NOT NULL DEFAULT 0,
+
+  art_embedded INTEGER DEFAULT 0,
+  art_automatic TEXT,
+  art_manual TEXT,
+  art_unset INTEGER DEFAULT 0,
+
+  effective_albumartist TEXT,
+  effective_originalyear INTEGER NOT NULL DEFAULT 0,
+
+  cue_path TEXT,
+
+  rating INTEGER DEFAULT -1,
+
+  acoustid_id TEXT,
+  acoustid_fingerprint TEXT,
+
+  musicbrainz_album_artist_id TEXT,
+  musicbrainz_artist_id TEXT,
+  musicbrainz_original_artist_id TEXT,
+  musicbrainz_album_id TEXT,
+  musicbrainz_original_album_id TEXT,
+  musicbrainz_recording_id TEXT,
+  musicbrainz_track_id TEXT,
+  musicbrainz_disc_id TEXT,
+  musicbrainz_release_group_id TEXT,
+  musicbrainz_work_id TEXT,
+
+  ebur128_integrated_loudness_lufs REAL,
+  ebur128_loudness_range_lu REAL
+
+);
+
+UPDATE schema_version SET version=22;

data/schema/schema.sql

@@ -1018,6 +1018,87 @@ CREATE TABLE IF NOT EXISTS qobuz_songs (
 
 );
 
+CREATE TABLE IF NOT EXISTS dropbox_songs (
+
+  title TEXT,
+  album TEXT,
+  artist TEXT,
+  albumartist TEXT,
+  track INTEGER NOT NULL DEFAULT -1,
+  disc INTEGER NOT NULL DEFAULT -1,
+  year INTEGER NOT NULL DEFAULT -1,
+  originalyear INTEGER NOT NULL DEFAULT -1,
+  genre TEXT,
+  compilation INTEGER NOT NULL DEFAULT 0,
+  composer TEXT,
+  performer TEXT,
+  grouping TEXT,
+  comment TEXT,
+  lyrics TEXT,
+
+  artist_id TEXT,
+  album_id TEXT,
+  song_id TEXT,
+
+  beginning INTEGER NOT NULL DEFAULT 0,
+  length INTEGER NOT NULL DEFAULT 0,
+
+  bitrate INTEGER NOT NULL DEFAULT -1,
+  samplerate INTEGER NOT NULL DEFAULT -1,
+  bitdepth INTEGER NOT NULL DEFAULT -1,
+
+  source INTEGER NOT NULL DEFAULT 0,
+  directory_id INTEGER NOT NULL DEFAULT -1,
+  url TEXT NOT NULL,
+  filetype INTEGER NOT NULL DEFAULT 0,
+  filesize INTEGER NOT NULL DEFAULT -1,
+  mtime INTEGER NOT NULL DEFAULT -1,
+  ctime INTEGER NOT NULL DEFAULT -1,
+  unavailable INTEGER DEFAULT 0,
+
+  fingerprint TEXT,
+
+  playcount INTEGER NOT NULL DEFAULT 0,
+  skipcount INTEGER NOT NULL DEFAULT 0,
+  lastplayed INTEGER NOT NULL DEFAULT -1,
+  lastseen INTEGER NOT NULL DEFAULT -1,
+
+  compilation_detected INTEGER DEFAULT 0,
+  compilation_on INTEGER NOT NULL DEFAULT 0,
+  compilation_off INTEGER NOT NULL DEFAULT 0,
+  compilation_effective INTEGER NOT NULL DEFAULT 0,
+
+  art_embedded INTEGER DEFAULT 0,
+  art_automatic TEXT,
+  art_manual TEXT,
+  art_unset INTEGER DEFAULT 0,
+
+  effective_albumartist TEXT,
+  effective_originalyear INTEGER NOT NULL DEFAULT 0,
+
+  cue_path TEXT,
+
+  rating INTEGER DEFAULT -1,
+
+  acoustid_id TEXT,
+  acoustid_fingerprint TEXT,
+
+  musicbrainz_album_artist_id TEXT,
+  musicbrainz_artist_id TEXT,
+  musicbrainz_original_artist_id TEXT,
+  musicbrainz_album_id TEXT,
+  musicbrainz_original_album_id TEXT,
+  musicbrainz_recording_id TEXT,
+  musicbrainz_track_id TEXT,
+  musicbrainz_disc_id TEXT,
+  musicbrainz_release_group_id TEXT,
+  musicbrainz_work_id TEXT,
+
+  ebur128_integrated_loudness_lufs REAL,
+  ebur128_loudness_range_lu REAL
+
+);
+
 CREATE TABLE IF NOT EXISTS playlists (
 
   name TEXT NOT NULL,

src/collection/collectionplaylistitem.cpp

@@ -41,9 +41,12 @@ bool CollectionPlaylistItem::InitFromQuery(const SqlRow &query) {
     case Song::Source::Collection:
       col = 0;
       break;
-    default:
+    case Song::Source::Dropbox:
       col = static_cast<int>(Song::kRowIdColumns.count());
       break;
+    default:
+      col = static_cast<int>(Song::kRowIdColumns.count() * 2);
+      break;
   }
 
   song_.InitFromQuery(query, true, col);

src/config.h.in

@@ -14,7 +14,6 @@
 #cmakedefine HAVE_GIO_UNIX
 #cmakedefine HAVE_DBUS
 #cmakedefine HAVE_MPRIS2
-#cmakedefine HAVE_WINDOWS_MEDIA_CONTROLS
 #cmakedefine HAVE_UDISKS2
 #cmakedefine HAVE_AUDIOCD
 #cmakedefine HAVE_MTP
@@ -34,6 +33,8 @@
 #cmakedefine HAVE_SPOTIFY
 #cmakedefine HAVE_QOBUZ
 #cmakedefine HAVE_DISCORD_RPC
+#cmakedefine HAVE_DROPBOX
+#cmakedefine HAVE_ONEDRIVE
 
 #cmakedefine HAVE_TAGLIB_DSFFILE
 #cmakedefine HAVE_TAGLIB_DSDIFFFILE

src/constants/dropboxconstants.h

@@ -0,0 +1,30 @@
+/*
+* Strawberry Music Player
+* Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+*
+* Strawberry is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* Strawberry is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+*
+*/
+
+#ifndef DROPBOXCONSTANTS_H
+#define DROPBOXCONSTANTS_H
+
+namespace DropboxConstants {
+
+constexpr char kApiUrl[] = "https://api.dropboxapi.com";
+constexpr char kNotifyApiUrl[] = "https://notify.dropboxapi.com";
+
+}  // namespace
+
+#endif  // DROPBOXCONSTANTS_H

src/constants/dropboxsettings.h

@@ -0,0 +1,46 @@
+/*
+* Strawberry Music Player
+* Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+*
+* Strawberry is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* Strawberry is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+*
+*/
+
+#ifndef DROPBOXSETTINGS_H
+#define DROPBOXSETTINGS_H
+
+namespace DropboxSettings {
+
+constexpr char kSettingsGroup[] = "Dropbox";
+
+constexpr char kEnabled[] = "enabled";
+constexpr char kSearchDelay[] = "searchdelay";
+constexpr char kArtistsSearchLimit[] = "artistssearchlimit";
+constexpr char kAlbumsSearchLimit[] = "albumssearchlimit";
+constexpr char kSongsSearchLimit[] = "songssearchlimit";
+constexpr char kFetchAlbums[] = "fetchalbums";
+constexpr char kDownloadAlbumCovers[] = "downloadalbumcovers";
+
+constexpr char kTokenType[] = "token_type";
+constexpr char kAccessToken[] = "access_token";
+constexpr char kRefreshToken[] = "refresh_token";
+constexpr char kExpiresIn[] = "expires_in";
+constexpr char kLoginTime[] = "login_time";
+
+constexpr char kApiUrl[] = "https://api.dropboxapi.com";
+constexpr char kNotifyApiUrl[] = "https://notify.dropboxapi.com";
+
+}  // namespace
+
+#endif  // DROPBOXSETTINGS_H

src/core/application.cpp

@@ -105,6 +105,10 @@
 #  include "covermanager/qobuzcoverprovider.h"
 #endif
 
+#ifdef HAVE_DROPBOX
+#  include "dropbox/dropboxservice.h"
+#endif
+
 #ifdef HAVE_MOODBAR
 #  include "moodbar/moodbarcontroller.h"
 #  include "moodbar/moodbarloader.h"
@@ -200,6 +204,9 @@ class ApplicationImpl {
 #endif
 #ifdef HAVE_QOBUZ
           streaming_services->AddService(make_shared<QobuzService>(app->task_manager(), app->database(), app->network(), app->url_handlers(), app->albumcover_loader()));
+#endif
+#ifdef HAVE_DROPBOX
+          streaming_services->AddService(make_shared<DropboxService>(app->task_manager(), app->database(), app->network(), app->url_handlers(), app->tagreader_client(), app->albumcover_loader()));
 #endif
           return streaming_services;
         }),

src/core/filesystemmusicstorage.cpp

@@ -110,21 +110,32 @@ bool FilesystemMusicStorage::CopyToStorage(const CopyJob &job, QString &error_te
 
 bool FilesystemMusicStorage::DeleteFromStorage(const DeleteJob &job) {
 
-  QString path = job.metadata_.url().toLocalFile();
-  QFileInfo fileInfo(path);
+  const QString path = job.metadata_.url().toLocalFile();
+  const QFileInfo fileInfo(path);
 
 #if QT_VERSION >= QT_VERSION_CHECK(6, 9, 0)
   if (job.use_trash_ && QFile::supportsMoveToTrash()) {
 #else
   if (job.use_trash_) {
 #endif
-    return QFile::moveToTrash(path);
+    if (QFile::moveToTrash(path)) {
+      return true;
+    }
+    qLog(Warning) << "Moving file to trash failed for" << path << ", falling back to direct deletion";
   }
 
+  bool success = false;
   if (fileInfo.isDir()) {
-    return Utilities::RemoveRecursive(path);
+    success = Utilities::RemoveRecursive(path);
+  }
+  else {
+    success = QFile::remove(path);
   }
 
-  return QFile::remove(path);
+  if (!success) {
+    qLog(Error) << "Failed to delete file" << path;
+  }
+
+  return success;
 
 }

src/core/mainwindow.cpp

@@ -178,6 +178,9 @@
 #ifdef HAVE_QOBUZ
 #  include "constants/qobuzsettings.h"
 #endif
+#ifdef HAVE_DROPBOX
+#  include "constants/dropboxsettings.h"
+#endif
 
 #include "streaming/streamingservices.h"
 #include "streaming/streamingservice.h"
@@ -355,6 +358,9 @@ MainWindow::MainWindow(Application *app,
 #endif
 #ifdef HAVE_QOBUZ
       qobuz_view_(new StreamingTabsView(app->streaming_services()->ServiceBySource(Song::Source::Qobuz), app->albumcover_loader(), QLatin1String(QobuzSettings::kSettingsGroup), this)),
+#endif
+#ifdef HAVE_DROPBOX
+      dropbox_view_(new StreamingSongsView(app->streaming_services()->ServiceBySource(Song::Source::Dropbox), QLatin1String(DropboxSettings::kSettingsGroup), this)),
 #endif
       radio_view_(new RadioViewContainer(this)),
       lastfm_import_dialog_(new LastFMImportDialog(app_->lastfm_import(), this)),
@@ -441,6 +447,9 @@ MainWindow::MainWindow(Application *app,
 #ifdef HAVE_QOBUZ
   ui_->tabs->AddTab(qobuz_view_, u"qobuz"_s, IconLoader::Load(u"qobuz"_s, true, 0, 32), tr("Qobuz"));
 #endif
+#ifdef HAVE_DROPBOX
+  ui_->tabs->AddTab(dropbox_view_, u"dropbox"_s, IconLoader::Load(u"dropbox"_s, true, 0, 32), tr("Dropbox"));
+#endif
 
   // Add the playing widget to the fancy tab widget
   ui_->tabs->AddBottomWidget(ui_->widget_playing);
@@ -782,6 +791,12 @@ MainWindow::MainWindow(Application *app,
   }
 #endif
 
+#ifdef HAVE_DROPBOX
+  QObject::connect(dropbox_view_, &StreamingSongsView::ShowErrorDialog, this, &MainWindow::ShowErrorDialog);
+  QObject::connect(dropbox_view_, &StreamingSongsView::OpenSettingsDialog, this, &MainWindow::OpenServiceSettingsDialog);
+  QObject::connect(dropbox_view_->view(), &StreamingCollectionView::AddToPlaylistSignal, this, &MainWindow::AddToPlaylist);
+#endif
+
   QObject::connect(radio_view_, &RadioViewContainer::Refresh, &*app_->radio_services(), &RadioServices::RefreshChannels);
   QObject::connect(radio_view_->view(), &RadioView::GetChannels, &*app_->radio_services(), &RadioServices::GetChannels);
   QObject::connect(radio_view_->view(), &RadioView::AddToPlaylistSignal, this, &MainWindow::AddToPlaylist);
@@ -1280,6 +1295,18 @@ void MainWindow::ReloadSettings() {
   }
 #endif
 
+#ifdef HAVE_DROPBOX
+  s.beginGroup(DropboxSettings::kSettingsGroup);
+  const bool enable_dropbox = s.value(DropboxSettings::kEnabled, false).toBool();
+  s.endGroup();
+  if (enable_dropbox) {
+    ui_->tabs->EnableTab(dropbox_view_);
+  }
+  else {
+    ui_->tabs->DisableTab(dropbox_view_);
+  }
+#endif
+
   ui_->tabs->ReloadSettings();
 
 }
@@ -1326,10 +1353,12 @@ void MainWindow::ReloadAllSettings() {
   qobuz_view_->ReloadSettings();
   qobuz_view_->search_view()->ReloadSettings();
 #endif
+#ifdef HAVE_DROPBOX
+  dropbox_view_->ReloadSettings();
+#endif
 #ifdef HAVE_DISCORD_RPC
   discord_rich_presence_->ReloadSettings();
 #endif
-
 }
 
 void MainWindow::RefreshStyleSheet() {
@@ -2717,6 +2746,9 @@ void MainWindow::OpenServiceSettingsDialog(const Song::Source source) {
     case Song::Source::Spotify:
       settings_dialog_->OpenAtPage(SettingsDialog::Page::Spotify);
       break;
+    case Song::Source::Dropbox:
+      settings_dialog_->OpenAtPage(SettingsDialog::Page::Dropbox);
+      break;
     default:
       break;
   }
@@ -3398,6 +3430,11 @@ void MainWindow::FocusSearchField() {
   else if (ui_->tabs->currentIndex() == ui_->tabs->IndexOfTab(qobuz_view_) && !qobuz_view_->SearchFieldHasFocus()) {
     qobuz_view_->FocusSearchField();
   }
+#endif
+#ifdef HAVE_DROPBOX
+  else if (ui_->tabs->currentIndex() == ui_->tabs->IndexOfTab(dropbox_view_) && !dropbox_view_->SearchFieldHasFocus()) {
+    dropbox_view_->FocusSearchField();
+  }
 #endif
   else if (!ui_->playlist->SearchFieldHasFocus()) {
     ui_->playlist->FocusSearchField();

src/core/mainwindow.h

@@ -355,6 +355,9 @@ class MainWindow : public QMainWindow, public PlatformInterface {
 #ifdef HAVE_QOBUZ
   StreamingTabsView *qobuz_view_;
 #endif
+#ifdef HAVE_DROPBOX
+  StreamingSongsView *dropbox_view_;
+#endif
 
   RadioViewContainer *radio_view_;
 

src/core/song.cpp

@@ -1163,6 +1163,8 @@ QString Song::TextForSource(const Source source) {
     case Source::Qobuz:         return u"qobuz"_s;
     case Source::SomaFM:        return u"somafm"_s;
     case Source::RadioParadise: return u"radioparadise"_s;
+    case Source::Dropbox:       return u"dropbox"_s;
+    case Source::OneDrive:      return u"onedrive"_s;
     case Source::Unknown:       return u"unknown"_s;
   }
   return u"unknown"_s;
@@ -1183,6 +1185,8 @@ QString Song::DescriptionForSource(const Source source) {
     case Source::Qobuz:         return u"Qobuz"_s;
     case Source::SomaFM:        return u"SomaFM"_s;
     case Source::RadioParadise: return u"Radio Paradise"_s;
+    case Source::Dropbox:       return u"Dropbox"_s;
+    case Source::OneDrive:      return u"OneDrive"_s;
     case Source::Unknown:       return u"Unknown"_s;
   }
   return u"unknown"_s;
@@ -1202,6 +1206,8 @@ Song::Source Song::SourceFromText(const QString &source) {
   if (source.compare("qobuz"_L1, Qt::CaseInsensitive) == 0) return Source::Qobuz;
   if (source.compare("somafm"_L1, Qt::CaseInsensitive) == 0) return Source::SomaFM;
   if (source.compare("radioparadise"_L1, Qt::CaseInsensitive) == 0) return Source::RadioParadise;
+  if (source.compare("dropbox"_L1, Qt::CaseInsensitive) == 0) return Source::Dropbox;
+  if (source.compare("onedrive"_L1, Qt::CaseInsensitive) == 0) return Source::OneDrive;
 
   return Source::Unknown;
 
@@ -1221,6 +1227,8 @@ QIcon Song::IconForSource(const Source source) {
     case Source::Qobuz:         return IconLoader::Load(u"qobuz"_s);
     case Source::SomaFM:        return IconLoader::Load(u"somafm"_s);
     case Source::RadioParadise: return IconLoader::Load(u"radioparadise"_s);
+    case Source::Dropbox:       return IconLoader::Load(u"dropbox"_s);
+    case Source::OneDrive:      return IconLoader::Load(u"onedrive"_s);
     case Source::Unknown:       return IconLoader::Load(u"edit-delete"_s);
   }
   return IconLoader::Load(u"edit-delete"_s);
@@ -1470,7 +1478,7 @@ Song::FileType Song::FiletypeByExtension(const QString &ext) {
 
 bool Song::IsLinkedCollectionSource(const Source source) {
 
-  return source == Source::Collection;
+  return source == Source::Collection || source == Source::Dropbox;
 
 }
 
@@ -1489,11 +1497,14 @@ QString Song::ImageCacheDir(const Source source) {
       return StandardPaths::WritableLocation(StandardPaths::StandardLocation::AppLocalDataLocation) + u"/qobuzalbumcovers"_s;
     case Source::Device:
       return StandardPaths::WritableLocation(StandardPaths::StandardLocation::AppLocalDataLocation) + u"/devicealbumcovers"_s;
+    case Source::Dropbox:
+      return StandardPaths::WritableLocation(StandardPaths::StandardLocation::AppLocalDataLocation) + u"/dropboxalbumcovers"_s;
     case Source::LocalFile:
     case Source::CDDA:
     case Source::Stream:
     case Source::SomaFM:
     case Source::RadioParadise:
+    case Source::OneDrive:
     case Source::Unknown:
       return StandardPaths::WritableLocation(StandardPaths::StandardLocation::AppLocalDataLocation) + u"/albumcovers"_s;
   }

src/core/song.h

@@ -76,7 +76,9 @@ class Song {
     Qobuz = 8,
     SomaFM = 9,
     RadioParadise = 10,
-    Spotify = 11
+    Spotify = 11,
+    Dropbox = 12,
+    OneDrive = 13,
   };
   static const int kSourceCount = 16;
 

src/core/songloader.cpp

@@ -98,6 +98,9 @@ SongLoader::SongLoader(const SharedPtr<UrlHandlers> url_handlers,
 
   QObject::connect(timeout_timer_, &QTimer::timeout, this, &SongLoader::Timeout);
 
+  QObject::connect(playlist_parser_, &PlaylistParser::Error, this, &SongLoader::ParserError);
+  QObject::connect(cue_parser_, &CueParser::Error, this, &SongLoader::ParserError);
+
 }
 
 SongLoader::~SongLoader() {
@@ -106,6 +109,10 @@ SongLoader::~SongLoader() {
 
 }
 
+void SongLoader::ParserError(const QString &error) {
+  errors_ << error;
+}
+
 SongLoader::Result SongLoader::Load(const QUrl &url) {
 
   if (url.isEmpty()) return Result::Error;
@@ -287,6 +294,7 @@ SongLoader::Result SongLoader::LoadLocalAsync(const QString &filename) {
   }
 
   if (parser) {  // It's a playlist!
+    QObject::connect(parser, &ParserBase::Error, this, &SongLoader::ParserError, static_cast<Qt::ConnectionType>(Qt::QueuedConnection | Qt::UniqueConnection));
     qLog(Debug) << "Parsing using" << parser->name();
     LoadPlaylist(parser, filename);
     return Result::Success;
@@ -706,6 +714,10 @@ void SongLoader::MagicReady() {
     StopTypefindAsync(true);
   }
 
+  if (parser_) {
+    QObject::connect(parser_, &ParserBase::Error, this, &SongLoader::ParserError, static_cast<Qt::ConnectionType>(Qt::QueuedConnection | Qt::UniqueConnection));
+  }
+
   state_ = State::WaitingForData;
 
   if (!IsPipelinePlaying()) {

src/core/songloader.h

@@ -99,6 +99,7 @@ class SongLoader : public QObject {
   void ScheduleTimeout();
   void Timeout();
   void StopTypefind();
+  void ParserError(const QString &error);
 
 #ifdef HAVE_AUDIOCD
   void AudioCDTracksLoadErrorSlot(const QString &error);

src/core/windowsmediacontroller.cpp

@@ -1,303 +0,0 @@
-/*
- * Strawberry Music Player
- * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
- *
- * Strawberry is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Strawberry is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#include "config.h"
-
-#include <windows.h>
-
-#include <QObject>
-#include <QString>
-#include <QUrl>
-
-// Undefine 'interface' macro from windows.h before including WinRT headers
-#pragma push_macro("interface")
-#undef interface
-
-#include <winrt/Windows.Foundation.h>
-#include <winrt/Windows.Media.h>
-#include <winrt/Windows.Storage.h>
-#include <winrt/Windows.Storage.Streams.h>
-
-#pragma pop_macro("interface")
-
-// Include the interop header for ISystemMediaTransportControlsInterop
-#include <systemmediatransportcontrolsinterop.h>
-
-#include "core/logging.h"
-#include "windowsmediacontroller.h"
-
-#include "core/song.h"
-#include "core/player.h"
-#include "engine/enginebase.h"
-#include "playlist/playlistmanager.h"
-#include "covermanager/currentalbumcoverloader.h"
-#include "covermanager/albumcoverloaderresult.h"
-
-using namespace winrt;
-using namespace Windows::Foundation;
-using namespace Windows::Media;
-using namespace Windows::Storage;
-using namespace Windows::Storage::Streams;
-
-// Helper struct to hold the WinRT object
-struct WindowsMediaControllerPrivate {
-  SystemMediaTransportControls smtc{nullptr};
-};
-
-WindowsMediaController::WindowsMediaController(HWND hwnd,
-                                               const SharedPtr<Player> player,
-                                               const SharedPtr<PlaylistManager> playlist_manager,
-                                               const SharedPtr<CurrentAlbumCoverLoader> current_albumcover_loader,
-                                               QObject *parent)
-    : QObject(parent),
-      player_(player),
-      playlist_manager_(playlist_manager),
-      current_albumcover_loader_(current_albumcover_loader),
-      smtc_(nullptr),
-      apartment_initialized_(false) {
-
-  try {
-    // Initialize WinRT apartment if not already initialized
-    // Qt or other components may have already initialized it
-    try {
-      winrt::init_apartment(winrt::apartment_type::single_threaded);
-      apartment_initialized_ = true;
-    }
-    catch (const hresult_error &e) {
-      // Apartment already initialized - this is fine, continue
-      if (e.code() != RPC_E_CHANGED_MODE) {
-        throw;
-      }
-    }
-
-    // Create private implementation
-    auto *priv = new WindowsMediaControllerPrivate();
-    smtc_ = priv;
-
-    // Get the SystemMediaTransportControls instance for this window
-    // Use the interop interface
-    auto interop = winrt::get_activation_factory<SystemMediaTransportControls, ISystemMediaTransportControlsInterop>();
-
-    if (!interop) {
-      qLog(Warning) << "Failed to get ISystemMediaTransportControlsInterop";
-      delete priv;
-      smtc_ = nullptr;
-      return;
-    }
-
-    // Get SMTC for the window
-    winrt::com_ptr<IInspectable> inspectable;
-    HRESULT hr = interop->GetForWindow(hwnd, winrt::guid_of<SystemMediaTransportControls>(), inspectable.put_void());
-    
-    if (FAILED(hr) || !inspectable) {
-      qLog(Warning) << "Failed to get SystemMediaTransportControls for window, HRESULT:" << Qt::hex << static_cast<unsigned int>(hr);
-      delete priv;
-      smtc_ = nullptr;
-      return;
-    }
-
-    // Convert to SystemMediaTransportControls
-    priv->smtc = inspectable.as<SystemMediaTransportControls>();
-    
-    if (!priv->smtc) {
-      qLog(Warning) << "Failed to cast to SystemMediaTransportControls";
-      delete priv;
-      smtc_ = nullptr;
-      return;
-    }
-    
-    // Enable the controls
-    priv->smtc.IsEnabled(true);
-    priv->smtc.IsPlayEnabled(true);
-    priv->smtc.IsPauseEnabled(true);
-    priv->smtc.IsStopEnabled(true);
-    priv->smtc.IsNextEnabled(true);
-    priv->smtc.IsPreviousEnabled(true);
-
-    // Setup button handlers
-    SetupButtonHandlers();
-
-    // Connect signals from Player
-    QObject::connect(&*player_->engine(), &EngineBase::StateChanged, this, &WindowsMediaController::EngineStateChanged);
-    QObject::connect(&*playlist_manager_, &PlaylistManager::CurrentSongChanged, this, &WindowsMediaController::CurrentSongChanged);
-    QObject::connect(&*current_albumcover_loader_, &CurrentAlbumCoverLoader::AlbumCoverLoaded, this, &WindowsMediaController::AlbumCoverLoaded);
-
-    qLog(Info) << "Windows Media Transport Controls initialized successfully";
-  }
-  catch (const hresult_error &e) {
-    qLog(Warning) << "Failed to initialize Windows Media Transport Controls:" << QString::fromWCharArray(e.message().c_str());
-    if (smtc_) {
-      delete static_cast<WindowsMediaControllerPrivate*>(smtc_);
-      smtc_ = nullptr;
-    }
-  }
-  catch (...) {
-    qLog(Warning) << "Failed to initialize Windows Media Transport Controls: unknown error";
-    if (smtc_) {
-      delete static_cast<WindowsMediaControllerPrivate*>(smtc_);
-      smtc_ = nullptr;
-    }
-  }
-}
-
-WindowsMediaController::~WindowsMediaController() {
-  if (smtc_) {
-    auto *priv = static_cast<WindowsMediaControllerPrivate*>(smtc_);
-    if (priv->smtc) {
-      priv->smtc.IsEnabled(false);
-    }
-    delete priv;
-    smtc_ = nullptr;
-  }
-  // Only uninit if we initialized the apartment
-  if (apartment_initialized_) {
-    winrt::uninit_apartment();
-  }
-}
-
-void WindowsMediaController::SetupButtonHandlers() {
-  if (!smtc_) return;
-
-  auto *priv = static_cast<WindowsMediaControllerPrivate*>(smtc_);
-  if (!priv->smtc) return;
-
-  // Handle button pressed events
-  priv->smtc.ButtonPressed([this](const SystemMediaTransportControls &, const SystemMediaTransportControlsButtonPressedEventArgs &args) {
-    switch (args.Button()) {
-      case SystemMediaTransportControlsButton::Play:
-        player_->Play();
-        break;
-      case SystemMediaTransportControlsButton::Pause:
-        player_->Pause();
-        break;
-      case SystemMediaTransportControlsButton::Stop:
-        player_->Stop();
-        break;
-      case SystemMediaTransportControlsButton::Next:
-        player_->Next();
-        break;
-      case SystemMediaTransportControlsButton::Previous:
-        player_->Previous();
-        break;
-      default:
-        break;
-    }
-  });
-}
-
-void WindowsMediaController::EngineStateChanged(EngineBase::State newState) {
-  UpdatePlaybackStatus(newState);
-}
-
-void WindowsMediaController::UpdatePlaybackStatus(EngineBase::State state) {
-  if (!smtc_) return;
-
-  auto *priv = static_cast<WindowsMediaControllerPrivate*>(smtc_);
-  if (!priv->smtc) return;
-
-  try {
-    switch (state) {
-      case EngineBase::State::Playing:
-        priv->smtc.PlaybackStatus(MediaPlaybackStatus::Playing);
-        break;
-      case EngineBase::State::Paused:
-        priv->smtc.PlaybackStatus(MediaPlaybackStatus::Paused);
-        break;
-      case EngineBase::State::Empty:
-      case EngineBase::State::Idle:
-        priv->smtc.PlaybackStatus(MediaPlaybackStatus::Stopped);
-        break;
-    }
-  }
-  catch (const hresult_error &e) {
-    qLog(Warning) << "Failed to update playback status:" << QString::fromWCharArray(e.message().c_str());
-  }
-}
-
-void WindowsMediaController::CurrentSongChanged(const Song &song) {
-  if (!song.is_valid()) {
-    return;
-  }
-  
-  // Update metadata immediately with what we have
-  UpdateMetadata(song, QUrl());
-  
-  // Album cover will be updated via AlbumCoverLoaded signal
-}
-
-void WindowsMediaController::AlbumCoverLoaded(const Song &song, const AlbumCoverLoaderResult &result) {
-  if (!song.is_valid()) {
-    return;
-  }
-
-  // Update metadata with album cover
-  UpdateMetadata(song, result.temp_cover_url.isEmpty() ? result.album_cover.cover_url : result.temp_cover_url);
-}
-
-void WindowsMediaController::UpdateMetadata(const Song &song, const QUrl &art_url) {
-  if (!smtc_) return;
-
-  auto *priv = static_cast<WindowsMediaControllerPrivate*>(smtc_);
-  if (!priv->smtc) return;
-
-  try {
-    // Get the updater
-    SystemMediaTransportControlsDisplayUpdater updater = priv->smtc.DisplayUpdater();
-    updater.Type(MediaPlaybackType::Music);
-
-    // Get the music properties
-    auto musicProperties = updater.MusicProperties();
-
-    // Set basic metadata
-    if (!song.title().isEmpty()) {
-      musicProperties.Title(winrt::hstring(song.title().toStdWString()));
-    }
-    if (!song.artist().isEmpty()) {
-      musicProperties.Artist(winrt::hstring(song.artist().toStdWString()));
-    }
-    if (!song.album().isEmpty()) {
-      musicProperties.AlbumTitle(winrt::hstring(song.album().toStdWString()));
-    }
-
-    // Set album art if available
-    if (art_url.isValid() && art_url.isLocalFile()) {
-      QString artPath = art_url.toLocalFile();
-      if (!artPath.isEmpty()) {
-        try {
-          // Use file:// URI to avoid async blocking in STA thread
-          QString fileUri = QUrl::fromLocalFile(artPath).toString();
-          auto thumbnailStream = RandomAccessStreamReference::CreateFromUri(
-            winrt::Windows::Foundation::Uri(winrt::hstring(fileUri.toStdWString()))
-          );
-          updater.Thumbnail(thumbnailStream);
-          current_song_art_url_ = artPath;
-        }
-        catch (const hresult_error &e) {
-          qLog(Debug) << "Failed to set album art:" << QString::fromWCharArray(e.message().c_str());
-        }
-      }
-    }
-
-    // Update the display
-    updater.Update();
-  }
-  catch (const hresult_error &e) {
-    qLog(Warning) << "Failed to update metadata:" << QString::fromWCharArray(e.message().c_str());
-  }
-}

src/core/windowsmediacontroller.h

@@ -1,69 +0,0 @@
-/*
- * Strawberry Music Player
- * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
- *
- * Strawberry is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Strawberry is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
- *
- */
-
-#ifndef WINDOWSMEDIACONTROLLER_H
-#define WINDOWSMEDIACONTROLLER_H
-
-#include "config.h"
-
-#include <windows.h>
-
-#include <QObject>
-#include <QString>
-
-#include "includes/shared_ptr.h"
-#include "engine/enginebase.h"
-#include "covermanager/albumcoverloaderresult.h"
-
-class Player;
-class PlaylistManager;
-class CurrentAlbumCoverLoader;
-class Song;
-
-class WindowsMediaController : public QObject {
-  Q_OBJECT
-
- public:
-  explicit WindowsMediaController(HWND hwnd,
-                                   const SharedPtr<Player> player,
-                                   const SharedPtr<PlaylistManager> playlist_manager,
-                                   const SharedPtr<CurrentAlbumCoverLoader> current_albumcover_loader,
-                                   QObject *parent = nullptr);
-  ~WindowsMediaController() override;
-
- private Q_SLOTS:
-  void AlbumCoverLoaded(const Song &song, const AlbumCoverLoaderResult &result = AlbumCoverLoaderResult());
-  void EngineStateChanged(EngineBase::State newState);
-  void CurrentSongChanged(const Song &song);
-
- private:
-  void UpdatePlaybackStatus(EngineBase::State state);
-  void UpdateMetadata(const Song &song, const QUrl &art_url);
-  void SetupButtonHandlers();
-
- private:
-  const SharedPtr<Player> player_;
-  const SharedPtr<PlaylistManager> playlist_manager_;
-  const SharedPtr<CurrentAlbumCoverLoader> current_albumcover_loader_;
-  void *smtc_;  // Pointer to SystemMediaTransportControls (opaque to avoid WinRT headers in public header)
-  QString current_song_art_url_;
-  bool apartment_initialized_;  // Track if we initialized the WinRT apartment
-};
-
-#endif  // WINDOWSMEDIACONTROLLER_H

src/covermanager/albumcoverchoicecontroller.cpp

@@ -589,6 +589,8 @@ void AlbumCoverChoiceController::SaveArtManualToSong(Song *song, const QUrl &art
     case Song::Source::Tidal:
     case Song::Source::Spotify:
     case Song::Source::Qobuz:
+    case Song::Source::Dropbox:
+    case Song::Source::OneDrive:
       StreamingServicePtr service = streaming_services_->ServiceBySource(song->source());
       if (!service) break;
       if (service->artists_collection_backend()) {

src/dropbox/dropboxbaserequest.cpp

@@ -0,0 +1,132 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QByteArray>
+#include <QString>
+#include <QUrl>
+#include <QNetworkReply>
+#include <QJsonObject>
+
+#include "constants/dropboxconstants.h"
+#include "core/networkaccessmanager.h"
+#include "dropboxservice.h"
+#include "dropboxbaserequest.h"
+
+using namespace Qt::Literals::StringLiterals;
+using namespace DropboxConstants;
+
+DropboxBaseRequest::DropboxBaseRequest(const SharedPtr<NetworkAccessManager> network, DropboxService *service, QObject *parent)
+    : JsonBaseRequest(network, parent),
+      service_(service) {}
+
+QString DropboxBaseRequest::service_name() const {
+
+  return service_->name();
+
+}
+
+bool DropboxBaseRequest::authentication_required() const {
+
+  return true;
+
+}
+
+bool DropboxBaseRequest::authenticated() const {
+
+  return service_->authenticated();
+
+}
+
+bool DropboxBaseRequest::use_authorization_header() const {
+
+  return true;
+
+}
+
+QByteArray DropboxBaseRequest::authorization_header() const {
+
+  return service_->authorization_header();
+
+}
+
+QNetworkReply *DropboxBaseRequest::GetTemporaryLink(const QUrl &url) {
+
+  QJsonObject json_object;
+  json_object.insert("path"_L1, url.path());
+  return CreatePostRequest(QUrl(QLatin1String(kApiUrl) + "/2/files/get_temporary_link"_L1), json_object);
+
+}
+
+JsonBaseRequest::JsonObjectResult DropboxBaseRequest::ParseJsonObject(QNetworkReply *reply) {
+
+  if (reply->error() != QNetworkReply::NoError && reply->error() < 200) {
+    return ReplyDataResult(ErrorCode::NetworkError, QStringLiteral("%1 (%2)").arg(reply->errorString()).arg(reply->error()));
+  }
+
+  JsonObjectResult result(ErrorCode::Success);
+  result.network_error = reply->error();
+  if (reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).isValid()) {
+    result.http_status_code = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+  }
+
+  const QByteArray data = reply->readAll();
+  if (!data.isEmpty()) {
+    QJsonParseError json_parse_error;
+    const QJsonDocument json_document = QJsonDocument::fromJson(data, &json_parse_error);
+    if (json_parse_error.error == QJsonParseError::NoError) {
+      const QJsonObject json_object = json_document.object();
+      if (json_object.contains("error"_L1) && json_object["error"_L1].isObject()) {
+        const QJsonObject object_error = json_object["error"_L1].toObject();
+        if (object_error.contains("status"_L1) && object_error.contains("message"_L1)) {
+          const int status = object_error["status"_L1].toInt();
+          const QString message = object_error["message"_L1].toString();
+          result.error_code = ErrorCode::APIError;
+          result.error_message = QStringLiteral("%1 (%2)").arg(message).arg(status);
+        }
+      }
+      else {
+        result.json_object = json_document.object();
+      }
+    }
+    else {
+      result.error_code = ErrorCode::ParseError;
+      result.error_message = json_parse_error.errorString();
+    }
+  }
+
+  if (result.error_code != ErrorCode::APIError) {
+    if (reply->error() != QNetworkReply::NoError) {
+      result.error_code = ErrorCode::NetworkError;
+      result.error_message = QStringLiteral("%1 (%2)").arg(reply->errorString()).arg(reply->error());
+    }
+    else if (result.http_status_code != 200) {
+      result.error_code = ErrorCode::HttpError;
+      result.error_message = QStringLiteral("Received HTTP code %1").arg(result.http_status_code);
+    }
+  }
+
+  if (reply->error() == QNetworkReply::AuthenticationRequiredError) {
+    service_->ClearSession();
+  }
+
+  return result;
+
+}

src/dropbox/dropboxbaserequest.h

@@ -0,0 +1,59 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef DROPBOXBASEREQUEST_H
+#define DROPBOXBASEREQUEST_H
+
+#include "config.h"
+
+#include <QByteArray>
+#include <QString>
+#include <QUrl>
+
+#include "includes/shared_ptr.h"
+#include "core/jsonbaserequest.h"
+
+class QNetworkReply;
+class NetworkAccessManager;
+class DropboxService;
+
+class DropboxBaseRequest : public JsonBaseRequest {
+  Q_OBJECT
+
+ public:
+  explicit DropboxBaseRequest(const SharedPtr<NetworkAccessManager> network, DropboxService *service, QObject *parent = nullptr);
+
+  QString service_name() const override;
+  bool authentication_required() const override;
+  bool authenticated() const override;
+  bool use_authorization_header() const override;
+  QByteArray authorization_header() const override;
+
+ protected:
+  QNetworkReply *GetTemporaryLink(const QUrl &url);
+  JsonObjectResult ParseJsonObject(QNetworkReply *reply);
+
+ Q_SIGNALS:
+  void ShowErrorDialog(const QString &error);
+
+ private:
+  DropboxService *service_;
+};
+
+#endif  // DROPBOXBASEREQUEST_H

src/dropbox/dropboxservice.cpp

@@ -0,0 +1,190 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QString>
+#include <QUrl>
+#include <QTimer>
+
+#include "constants/dropboxsettings.h"
+#include "core/logging.h"
+#include "core/settings.h"
+#include "core/database.h"
+#include "core/urlhandlers.h"
+#include "core/networkaccessmanager.h"
+#include "core/oauthenticator.h"
+#include "collection/collectionbackend.h"
+#include "collection/collectionmodel.h"
+#include "streaming/cloudstoragestreamingservice.h"
+#include "dropboxservice.h"
+#include "dropboxurlhandler.h"
+#include "dropboxsongsrequest.h"
+#include "dropboxstreamurlrequest.h"
+
+using namespace Qt::Literals::StringLiterals;
+using namespace DropboxSettings;
+
+const Song::Source DropboxService::kSource = Song::Source::Dropbox;
+
+namespace {
+constexpr char kClientIDB64[] = "Zmx0b2EyYzRwaGo2eHlw";
+constexpr char kClientSecretB64[] = "emo3em5jNnNpM3Ftd2s3";
+constexpr char kOAuthRedirectUrl[] = "http://localhost/";
+constexpr char kOAuthAuthorizeUrl[] = "https://www.dropbox.com/1/oauth2/authorize";
+constexpr char kOAuthAccessTokenUrl[] = "https://api.dropboxapi.com/1/oauth2/token";
+}  // namespace
+
+DropboxService::DropboxService(const SharedPtr<TaskManager> task_manager,
+                               const SharedPtr<Database> database,
+                               const SharedPtr<NetworkAccessManager> network,
+                               const SharedPtr<UrlHandlers> url_handlers,
+                               const SharedPtr<TagReaderClient> tagreader_client,
+                               const SharedPtr<AlbumCoverLoader> albumcover_loader,
+                               QObject *parent)
+    : CloudStorageStreamingService(task_manager, database, tagreader_client, albumcover_loader, Song::Source::Dropbox, u"Dropbox"_s, u"dropbox"_s, QLatin1String(kSettingsGroup), parent),
+      network_(network),
+      oauth_(new OAuthenticator(network, this)),
+      songs_request_(new DropboxSongsRequest(network, collection_backend_, this, this)),
+      enabled_(false),
+      next_stream_url_request_id_(0) {
+
+  url_handlers->Register(new DropboxUrlHandler(task_manager, this, this));
+
+  oauth_->set_settings_group(QLatin1String(kSettingsGroup));
+  oauth_->set_type(OAuthenticator::Type::Authorization_Code);
+  oauth_->set_authorize_url(QUrl(QLatin1String(kOAuthAuthorizeUrl)));
+  oauth_->set_redirect_url(QUrl(QLatin1String(kOAuthRedirectUrl)));
+  oauth_->set_access_token_url(QUrl(QLatin1String(kOAuthAccessTokenUrl)));
+  oauth_->set_client_id(QString::fromLatin1(QByteArray::fromBase64(kClientIDB64)));
+  oauth_->set_client_secret(QString::fromLatin1(QByteArray::fromBase64(kClientSecretB64)));
+  oauth_->set_use_local_redirect_server(true);
+  oauth_->set_random_port(true);
+
+  QObject::connect(oauth_, &OAuthenticator::AuthenticationFinished, this, &DropboxService::OAuthFinished);
+
+  DropboxService::ReloadSettings();
+  oauth_->LoadSession();
+
+}
+
+bool DropboxService::authenticated() const {
+
+  return oauth_->authenticated();
+
+}
+
+void DropboxService::Exit() {
+
+  wait_for_exit_ << &*collection_backend_;
+  QObject::connect(&*collection_backend_, &CollectionBackend::ExitFinished, this, &DropboxService::ExitReceived);
+  collection_backend_->ExitAsync();
+
+}
+
+void DropboxService::ExitReceived() {
+
+  QObject *obj = sender();
+  QObject::disconnect(obj, nullptr, this, nullptr);
+  qLog(Debug) << obj << "successfully exited.";
+  wait_for_exit_.removeAll(obj);
+  if (wait_for_exit_.isEmpty()) Q_EMIT ExitFinished();
+
+}
+
+void DropboxService::ReloadSettings() {
+
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+  enabled_ = s.value(kEnabled, false).toBool();
+  s.endGroup();
+
+}
+
+void DropboxService::Authenticate() {
+
+  oauth_->Authenticate();
+
+}
+
+void DropboxService::ClearSession() {
+
+  oauth_->ClearSession();
+}
+
+void DropboxService::OAuthFinished(const bool success, const QString &error) {
+
+  if (success) {
+    Q_EMIT LoginFinished(true);
+    Q_EMIT LoginSuccess();
+  }
+  else {
+    Q_EMIT LoginFailure(error);
+    Q_EMIT LoginFinished(false);
+  }
+
+}
+
+QByteArray DropboxService::authorization_header() const {
+  return oauth_->authorization_header();
+}
+
+void DropboxService::Start() {
+  songs_request_->GetFolderList();
+}
+
+void DropboxService::Reset() {
+
+  collection_backend_->DeleteAll();
+
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+  s.remove("cursor");
+  s.endGroup();
+
+  if (authenticated()) {
+    Start();
+  }
+
+}
+
+uint DropboxService::GetStreamURL(const QUrl &url, QString &error) {
+
+  if (!authenticated()) {
+    error = tr("Not authenticated with Dropbox.");
+    return 0;
+  }
+
+  uint id = 0;
+  while (id == 0) id = ++next_stream_url_request_id_;
+  DropboxStreamURLRequestPtr stream_url_request = DropboxStreamURLRequestPtr(new DropboxStreamURLRequest(network_, this, id, url));
+  stream_url_requests_.insert(id, stream_url_request);
+  QObject::connect(&*stream_url_request, &DropboxStreamURLRequest::StreamURLRequestFinished, this, &DropboxService::StreamURLRequestFinishedSlot);
+  stream_url_request->Process();
+
+  return id;
+
+}
+
+void DropboxService::StreamURLRequestFinishedSlot(const uint id, const QUrl &media_url, const bool success, const QUrl &stream_url, const QString &error) {
+
+  if (!stream_url_requests_.contains(id)) return;
+  DropboxStreamURLRequestPtr stream_url_request = stream_url_requests_.take(id);
+
+  Q_EMIT StreamURLRequestFinished(id, media_url, success, stream_url, error);
+
+}

src/dropbox/dropboxservice.h

@@ -0,0 +1,93 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef DROPBOXSERVICE_H
+#define DROPBOXSERVICE_H
+
+#include <QList>
+#include <QString>
+#include <QUrl>
+#include <QSharedPointer>
+
+#include "core/song.h"
+#include "streaming/cloudstoragestreamingservice.h"
+
+class QNetworkReply;
+
+class TaskManager;
+class Database;
+class NetworkAccessManager;
+class UrlHandlers;
+class TagReaderClient;
+class AlbumCoverLoader;
+class OAuthenticator;
+class DropboxSongsRequest;
+class DropboxStreamURLRequest;
+
+class DropboxService : public CloudStorageStreamingService {
+  Q_OBJECT
+
+ public:
+  explicit DropboxService(const SharedPtr<TaskManager> task_manager,
+                          const SharedPtr<Database> database,
+                          const SharedPtr<NetworkAccessManager> network,
+                          const SharedPtr<UrlHandlers> url_handlers,
+                          const SharedPtr<TagReaderClient> tagreader_client,
+                          const SharedPtr<AlbumCoverLoader> albumcover_loader,
+                          QObject *parent = nullptr);
+
+  static const Song::Source kSource;
+
+  bool oauth() const override { return true; }
+  bool authenticated() const override;
+  bool show_progress() const override { return false; }
+  bool enable_refresh_button() const override { return false; }
+
+  void Exit() override;
+  void ReloadSettings() override;
+
+  void Authenticate();
+  void ClearSession();
+
+  void Start();
+  void Reset();
+  uint GetStreamURL(const QUrl &url, QString &error);
+
+  QByteArray authorization_header() const;
+
+ Q_SIGNALS:
+  void StreamURLRequestFinished(const uint id, const QUrl &media_url, const bool success, const QUrl &stream_url, const QString &error = QString());
+
+ private Q_SLOTS:
+  void ExitReceived();
+  void OAuthFinished(const bool success, const QString &error = QString());
+  void StreamURLRequestFinishedSlot(const uint id, const QUrl &media_url, const bool success, const QUrl &stream_url, const QString &error = QString());
+
+ private:
+  const SharedPtr<NetworkAccessManager> network_;
+  OAuthenticator *oauth_;
+  DropboxSongsRequest *songs_request_;
+  bool enabled_;
+  QList<QObject*> wait_for_exit_;
+  bool finished_;
+  uint next_stream_url_request_id_;
+  QMap<uint, QSharedPointer<DropboxStreamURLRequest>> stream_url_requests_;
+};
+
+#endif  // DROPBOXSERVICE_H

src/dropbox/dropboxsongsrequest.cpp

@@ -0,0 +1,244 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QByteArray>
+#include <QString>
+#include <QUrl>
+#include <QDateTime>
+#include <QTimer>
+#include <QNetworkReply>
+#include <QJsonObject>
+#include <QJsonArray>
+#include <QJsonValue>
+
+#include "constants/dropboxsettings.h"
+#include "core/logging.h"
+#include "core/settings.h"
+#include "core/networkaccessmanager.h"
+#include "collection/collectionbackend.h"
+#include "dropboxservice.h"
+#include "dropboxbaserequest.h"
+#include "dropboxsongsrequest.h"
+
+using namespace Qt::Literals::StringLiterals;
+using namespace DropboxSettings;
+
+DropboxSongsRequest::DropboxSongsRequest(const SharedPtr<NetworkAccessManager> network, const SharedPtr<CollectionBackend> collection_backend, DropboxService *service, QObject *parent)
+    : DropboxBaseRequest(network, service, parent),
+      network_(network),
+      collection_backend_(collection_backend),
+      service_(service) {}
+
+void DropboxSongsRequest::GetFolderList() {
+
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+  QString cursor = s.value("cursor").toString();
+  s.endGroup();
+
+  QUrl url(QLatin1String(kApiUrl) + "/2/files/list_folder"_L1);
+  QJsonObject json_object;
+
+  if (cursor.isEmpty()) {
+    json_object.insert("path"_L1, ""_L1);
+    json_object.insert("recursive"_L1, true);
+    json_object.insert("include_deleted"_L1, true);
+  }
+  else {
+    url.setUrl(QLatin1String(kApiUrl) + "/2/files/list_folder/continue"_L1);
+    json_object.insert("cursor"_L1, cursor);
+  }
+
+  QNetworkReply *reply = CreatePostRequest(url, json_object);
+  QObject::connect(reply, &QNetworkReply::finished, this, [this, reply] { GetFolderListFinished(reply); });
+
+}
+
+void DropboxSongsRequest::GetFolderListFinished(QNetworkReply *reply) {
+
+  reply->deleteLater();
+
+  const JsonObjectResult json_object_result = ParseJsonObject(reply);
+  if (json_object_result.success()) {
+    Error(json_object_result.error_message);
+    return;
+  }
+
+  const QJsonObject &json_object = json_object_result.json_object;
+  if (json_object.isEmpty()) {
+    return;
+  }
+
+  if (json_object.contains("reset"_L1) && json_object["reset"_L1].toBool()) {
+    qLog(Debug) << "Resetting Dropbox database";
+    collection_backend_->DeleteAll();
+  }
+
+  {
+    Settings s;
+    s.beginGroup(kSettingsGroup);
+    s.setValue("cursor", json_object["cursor"_L1].toString());
+    s.endGroup();
+  }
+
+  const QJsonArray entires = json_object["entries"_L1].toArray();
+  qLog(Debug) << "File list found:" << entires.size();
+
+  QList<QUrl> urls_deleted;
+  for (const QJsonValue &value_entry : entires) {
+    if (!value_entry.isObject()) {
+      continue;
+    }
+    const QJsonObject object_entry = value_entry.toObject();
+    const QString tag = object_entry[".tag"_L1].toString();
+    const QString path = object_entry["path_lower"_L1].toString();
+    const qint64 size = object_entry["size"_L1].toInt();
+    const QString server_modified = object_entry["server_modified"_L1].toString();
+
+    QUrl url;
+    url.setScheme(service_->url_scheme());
+    url.setPath(path);
+
+    if (tag == "deleted"_L1) {
+      qLog(Debug) << "Deleting song with URL" << url;
+      urls_deleted << url;
+      continue;
+    }
+
+    if (tag == "folder"_L1) {
+      continue;
+    }
+
+    if (DropboxService::IsSupportedFiletype(path)) {
+      GetStreamURL(url, path, size, QDateTime::fromString(server_modified, Qt::ISODate).toSecsSinceEpoch());
+    }
+
+  }
+
+  if (!urls_deleted.isEmpty()) {
+    collection_backend_->DeleteSongsByUrlsAsync(urls_deleted);
+  }
+
+  if (json_object.contains("has_more"_L1) && json_object["has_more"_L1].isBool() && json_object["has_more"_L1].toBool()) {
+    Settings s;
+    s.beginGroup(kSettingsGroup);
+    s.setValue("cursor", json_object["cursor"_L1].toVariant());
+    s.endGroup();
+    GetFolderList();
+  }
+  else {
+    // Long-poll wait for changes.
+    LongPollDelta();
+  }
+
+}
+
+void DropboxSongsRequest::LongPollDelta() {
+
+  if (!service_->authenticated()) {
+    return;
+  }
+
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+  const QString cursor = s.value("cursor").toString();
+  s.endGroup();
+
+  QJsonObject json_object;
+  json_object.insert("cursor"_L1, cursor);
+  json_object.insert("timeout"_L1, 30);
+
+  QNetworkReply *reply = CreatePostRequest(QUrl(QLatin1String(kNotifyApiUrl) + "/2/files/list_folder/longpoll"_L1), json_object);
+  QObject::connect(reply, &QNetworkReply::finished, this, [this, reply] { LongPollDeltaFinished(reply); });
+
+}
+
+void DropboxSongsRequest::LongPollDeltaFinished(QNetworkReply *reply) {
+
+  reply->deleteLater();
+
+  const JsonObjectResult json_object_result = ParseJsonObject(reply);
+  if (json_object_result.success()) {
+    Error(json_object_result.error_message);
+    return;
+  }
+
+  const QJsonObject &json_object = json_object_result.json_object;
+  if (json_object["changes"_L1].toBool()) {
+    qLog(Debug) << "Dropbox: Received changes...";
+    GetFolderList();
+  }
+  else {
+    bool ok = false;
+    int backoff = json_object["backoff"_L1].toString().toInt(&ok);
+    if (!ok) {
+      backoff = 10;
+    }
+    QTimer::singleShot(backoff * 1000, this, &DropboxSongsRequest::LongPollDelta);
+  }
+
+}
+
+void DropboxSongsRequest::GetStreamURL(const QUrl &url, const QString &path, const qint64 size, const qint64 mtime) {
+
+  QNetworkReply *reply = GetTemporaryLink(url);
+  QObject::connect(reply, &QNetworkReply::finished, this, [this, reply, path, size, mtime]() {
+    GetStreamUrlFinished(reply, path, size, mtime);
+  });
+
+}
+
+void DropboxSongsRequest::GetStreamUrlFinished(QNetworkReply *reply, const QString &filename, const qint64 size, const qint64 mtime) {
+
+  reply->deleteLater();
+
+  const JsonObjectResult json_object_result = ParseJsonObject(reply);
+  if (!json_object_result.success()) {
+    Error(json_object_result.error_message);
+    return;
+  }
+
+  const QJsonObject &json_object = json_object_result.json_object;
+  if (json_object.isEmpty()) {
+    return;
+  }
+
+  if (!json_object.contains("link"_L1)) {
+    Error(u"Missing link"_s);
+    return;
+  }
+
+  const QUrl url = QUrl::fromEncoded(json_object["link"_L1].toVariant().toByteArray());
+
+  service_->MaybeAddFileToDatabase(url, filename, size, mtime);
+
+}
+
+void DropboxSongsRequest::Error(const QString &error_message, const QVariant &debug_output) {
+
+  qLog(Error) << service_name() << error_message;
+  if (debug_output.isValid()) {
+    qLog(Debug) << debug_output;
+  }
+
+  Q_EMIT ShowErrorDialog(error_message);
+
+}

src/dropbox/dropboxsongsrequest.h

@@ -0,0 +1,67 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef DROPBOXSONGSREQUEST_H
+#define DROPBOXSONGSREQUEST_H
+
+#include "config.h"
+
+#include <QList>
+#include <QString>
+#include <QUrl>
+
+#include "dropboxbaserequest.h"
+
+class NetworkAccessManager;
+class CollectionBackend;
+class QNetworkReply;
+class DropboxService;
+
+class DropboxSongsRequest : public DropboxBaseRequest {
+  Q_OBJECT
+
+ public:
+  explicit DropboxSongsRequest(const SharedPtr<NetworkAccessManager> network, const SharedPtr<CollectionBackend> collection_backend, DropboxService *service, QObject *parent = nullptr);
+
+  void ReloadSettings();
+
+  void GetFolderList();
+
+ Q_SIGNALS:
+  void ShowErrorDialog(const QString &error);
+
+ private:
+  void LongPollDelta();
+  void GetStreamURL(const QUrl &url, const QString &path, const qint64 size, const qint64 mtime);
+
+ protected:
+  void Error(const QString &error_message, const QVariant &debug_output = QVariant()) override;
+
+ private Q_SLOTS:
+  void GetFolderListFinished(QNetworkReply *reply);
+  void LongPollDeltaFinished(QNetworkReply *reply);
+  void GetStreamUrlFinished(QNetworkReply *reply, const QString &filename, const qint64 size, const qint64 mtime);
+
+ private:
+  const SharedPtr<NetworkAccessManager> network_;
+  const SharedPtr<CollectionBackend> collection_backend_;
+  DropboxService *service_;
+};
+
+#endif  // DROPBOXSONGSREQUEST_H

src/dropbox/dropboxstreamurlrequest.cpp

@@ -0,0 +1,129 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "config.h"
+
+#include <QByteArray>
+#include <QString>
+#include <QUrl>
+#include <QNetworkReply>
+#include <QJsonObject>
+
+#include "includes/shared_ptr.h"
+#include "core/logging.h"
+#include "core/networkaccessmanager.h"
+#include "dropboxservice.h"
+#include "dropboxbaserequest.h"
+#include "dropboxstreamurlrequest.h"
+
+using namespace Qt::Literals::StringLiterals;
+
+DropboxStreamURLRequest::DropboxStreamURLRequest(const SharedPtr<NetworkAccessManager> network, DropboxService *service, const uint id, const QUrl &media_url, QObject *parent)
+    : DropboxBaseRequest(network, service, parent),
+      network_(network),
+      service_(service),
+      id_(id),
+      media_url_(media_url),
+      reply_(nullptr) {}
+
+DropboxStreamURLRequest::~DropboxStreamURLRequest() {
+
+  if (reply_) {
+    QObject::disconnect(reply_, nullptr, this, nullptr);
+    if (reply_->isRunning()) reply_->abort();
+    reply_->deleteLater();
+    reply_ = nullptr;
+  }
+
+}
+
+void DropboxStreamURLRequest::Cancel() {
+
+  if (reply_ && reply_->isRunning()) {
+    reply_->abort();
+  }
+
+}
+
+void DropboxStreamURLRequest::Process() {
+
+  GetStreamURL();
+
+}
+
+void DropboxStreamURLRequest::GetStreamURL() {
+
+  if (reply_) {
+    QObject::disconnect(reply_, nullptr, this, nullptr);
+    if (reply_->isRunning()) reply_->abort();
+    reply_->deleteLater();
+  }
+
+  reply_ = GetTemporaryLink(media_url_);
+  QObject::connect(reply_, &QNetworkReply::finished, this, &DropboxStreamURLRequest::StreamURLReceived);
+
+}
+
+void DropboxStreamURLRequest::StreamURLReceived() {
+
+  const QScopeGuard finish = qScopeGuard([this]() { Finish(); });
+
+  if (!reply_) return;
+
+  Q_ASSERT(replies_.contains(reply_));
+  replies_.removeAll(reply_);
+
+  const JsonObjectResult json_object_result = ParseJsonObject(reply_).json_object;
+
+  QObject::disconnect(reply_, nullptr, this, nullptr);
+  reply_->deleteLater();
+  reply_ = nullptr;
+
+  if (!json_object_result.success()) {
+    Error(json_object_result.error_message);
+    return;
+  }
+
+  const QJsonObject &json_object = json_object_result.json_object;
+  if (json_object.isEmpty() || !json_object.contains("link"_L1)) {
+    Error(u"Could not parse stream URL"_s);
+    return;
+  }
+
+  stream_url_ = QUrl::fromEncoded(json_object["link"_L1].toVariant().toByteArray());
+  success_ = stream_url_.isValid();
+
+}
+
+void DropboxStreamURLRequest::Error(const QString &error_message, const QVariant &debug_output) {
+
+  qLog(Error) << service_name() << error_message;
+  if (debug_output.isValid()) {
+    qLog(Debug) << debug_output;
+  }
+
+  error_ = error_message;
+
+}
+
+void DropboxStreamURLRequest::Finish() {
+
+  Q_EMIT StreamURLRequestFinished(id_, media_url_, success_, stream_url_, error_);
+
+}

src/dropbox/dropboxstreamurlrequest.h

@@ -0,0 +1,71 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef DROPBOXSTREAMURLREQUEST_H
+#define DROPBOXSTREAMURLREQUEST_H
+
+#include "config.h"
+
+#include <QVariant>
+#include <QString>
+#include <QUrl>
+#include <QSharedPointer>
+
+#include "includes/shared_ptr.h"
+#include "dropboxservice.h"
+#include "dropboxbaserequest.h"
+
+class QNetworkReply;
+class NetworkAccessManager;
+
+class DropboxStreamURLRequest : public DropboxBaseRequest {
+  Q_OBJECT
+
+ public:
+  explicit DropboxStreamURLRequest(const SharedPtr<NetworkAccessManager> network, DropboxService *service, const uint id, const QUrl &media_url, QObject *parent = nullptr);
+  ~DropboxStreamURLRequest() override;
+
+  void Process();
+  void Cancel();
+
+ Q_SIGNALS:
+  void StreamURLRequestFinished(const uint id, const QUrl &media_url, const bool success, const QUrl &stream_url, const QString &error = QString());
+
+ private Q_SLOTS:
+  void StreamURLReceived();
+
+ private:
+  void GetStreamURL();
+  void Error(const QString &error_message, const QVariant &debug_output = QVariant()) override;
+  void Finish();
+
+ private:
+  const SharedPtr<NetworkAccessManager> network_;
+  DropboxService *service_;
+  uint id_;
+  QUrl media_url_;
+  QUrl stream_url_;
+  QNetworkReply *reply_;
+  bool success_;
+  QString error_;
+};
+
+using DropboxStreamURLRequestPtr = QSharedPointer<DropboxStreamURLRequest>;
+
+#endif  // DROPBOXSTREAMURLREQUEST_H

src/dropbox/dropboxurlhandler.cpp

@@ -0,0 +1,76 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QString>
+#include <QUrl>
+
+#include "includes/shared_ptr.h"
+#include "core/taskmanager.h"
+#include "dropboxurlhandler.h"
+#include "dropboxservice.h"
+
+DropboxUrlHandler::DropboxUrlHandler(const SharedPtr<TaskManager> task_manager, DropboxService *service, QObject *parent)
+    : UrlHandler(parent),
+      task_manager_(task_manager),
+      service_(service) {
+
+  QObject::connect(service, &DropboxService::StreamURLRequestFinished, this, &DropboxUrlHandler::StreamURLRequestFinished);
+
+}
+
+QString DropboxUrlHandler::scheme() const { return service_->url_scheme(); }
+
+UrlHandler::LoadResult DropboxUrlHandler::StartLoading(const QUrl &url) {
+
+  Request request;
+  request.task_id = task_manager_->StartTask(QStringLiteral("Loading %1 stream...").arg(url.scheme()));
+  QString error;
+  request.id = service_->GetStreamURL(url, error);
+  if (request.id == 0) {
+    CancelTask(request.task_id);
+    return LoadResult(url, LoadResult::Type::Error, error);
+  }
+
+  requests_.insert(request.id, request);
+
+  LoadResult load_result(url);
+  load_result.type_ = LoadResult::Type::WillLoadAsynchronously;
+
+  return load_result;
+
+}
+
+void DropboxUrlHandler::StreamURLRequestFinished(const uint id, const QUrl &media_url, const bool success, const QUrl &stream_url, const QString &error) {
+
+  if (!requests_.contains(id)) return;
+  const Request request = requests_.take(id);
+  CancelTask(request.task_id);
+
+  if (success) {
+    Q_EMIT AsyncLoadComplete(LoadResult(media_url, LoadResult::Type::TrackAvailable, stream_url));
+  }
+  else {
+    Q_EMIT AsyncLoadComplete(LoadResult(media_url, LoadResult::Type::Error, error));
+  }
+
+}
+
+void DropboxUrlHandler::CancelTask(const int task_id) {
+  task_manager_->SetTaskFinished(task_id);
+}

src/dropbox/dropboxurlhandler.h

@@ -0,0 +1,56 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef DROPBOXURLHANDLER_H
+#define DROPBOXURLHANDLER_H
+
+#include "includes/shared_ptr.h"
+#include "core/urlhandler.h"
+
+class TaskManager;
+class DropboxService;
+
+class DropboxUrlHandler : public UrlHandler {
+  Q_OBJECT
+
+ public:
+  explicit DropboxUrlHandler(const SharedPtr<TaskManager> task_manager, DropboxService *service, QObject *parent = nullptr);
+
+  QString scheme() const override;
+  LoadResult StartLoading(const QUrl &url) override;
+
+ private:
+  void CancelTask(const int task_id);
+
+ private Q_SLOTS:
+  void StreamURLRequestFinished(const uint id, const QUrl &media_url, const bool success, const QUrl &stream_url, const QString &error = QString());
+
+ private:
+  class Request {
+   public:
+    explicit Request() : id(0), task_id(-1) {}
+    uint id;
+    int task_id;
+  };
+  const SharedPtr<TaskManager> task_manager_;
+  DropboxService *service_;
+  QMap<uint, Request> requests_;
+};
+
+#endif  // DROPBOXURLHANDLER_H

src/engine/gstenginepipeline.cpp

@@ -178,7 +178,6 @@ GstEnginePipeline::GstEnginePipeline(QObject *parent)
       audiobin_(nullptr),
       audiosink_(nullptr),
       audioqueue_(nullptr),
-      audioqueueconverter_(nullptr),
       volume_(nullptr),
       volume_sw_(nullptr),
       volume_fading_(nullptr),
@@ -187,6 +186,7 @@ GstEnginePipeline::GstEnginePipeline(QObject *parent)
       equalizer_(nullptr),
       equalizer_preamp_(nullptr),
       eventprobe_(nullptr),
+      bufferprobe_(nullptr),
       logged_unsupported_analyzer_format_(false),
       about_to_finish_(false),
       finish_requested_(false),
@@ -436,7 +436,7 @@ void GstEnginePipeline::Disconnect() {
     }
 
     if (buffer_probe_cb_id_.has_value()) {
-      GstPad *pad = gst_element_get_static_pad(audioqueueconverter_, "src");
+      GstPad *pad = gst_element_get_static_pad(bufferprobe_, "src");
       if (pad) {
         gst_pad_remove_probe(pad, buffer_probe_cb_id_.value());
         gst_object_unref(pad);
@@ -674,8 +674,13 @@ bool GstEnginePipeline::InitAudioBin(QString &error) {
     return false;
   }
 
-  audioqueueconverter_ = CreateElement(u"audioconvert"_s, u"audioqueueconverter"_s, audiobin_, error);
-  if (!audioqueueconverter_) {
+  GstElement *audioqueueconverter = CreateElement(u"audioconvert"_s, u"audioqueueconverter"_s, audiobin_, error);
+  if (!audioqueueconverter) {
+    return false;
+  }
+
+  GstElement *audioqueueresampler = CreateElement(u"audioresample"_s, u"audioqueueresampler"_s, audiobin_, error);
+  if (!audioqueueresampler) {
     return false;
   }
 
@@ -684,6 +689,11 @@ bool GstEnginePipeline::InitAudioBin(QString &error) {
     return false;
   }
 
+  GstElement *audiosinkresampler = CreateElement(u"audioresample"_s, u"audiosinkresampler"_s, audiobin_, error);
+  if (!audiosinkresampler) {
+    return false;
+  }
+
   // Create the volume element if it's enabled.
   if (volume_enabled_ && !volume_) {
     volume_sw_ = CreateElement(u"volume"_s, u"volume_sw"_s, audiobin_, error);
@@ -761,7 +771,8 @@ bool GstEnginePipeline::InitAudioBin(QString &error) {
 
   }
 
-  eventprobe_ = audioqueueconverter_;
+  eventprobe_ = audioqueueconverter;
+  bufferprobe_ = audioqueueconverter;
 
   // Create the replaygain elements if it's enabled.
   GstElement *rgvolume = nullptr;
@@ -847,12 +858,17 @@ bool GstEnginePipeline::InitAudioBin(QString &error) {
 
   // Link all elements
 
-  if (!gst_element_link(audioqueue_, audioqueueconverter_)) {
+  if (!gst_element_link(audioqueue_, audioqueueconverter)) {
     error = u"Failed to link audio queue to audio queue converter."_s;
     return false;
   }
 
-  GstElement *element_link = audioqueueconverter_;  // The next element to link from.
+  if (!gst_element_link(audioqueueconverter, audioqueueresampler)) {
+    error = u"Failed to link audio queue converter to audio queue resampler."_s;
+    return false;
+  }
+
+  GstElement *element_link = audioqueueresampler;  // The next element to link from.
 
   // Link replaygain elements if enabled.
   if (rg_enabled_ && rgvolume && rglimiter && rgconverter) {
@@ -928,6 +944,11 @@ bool GstEnginePipeline::InitAudioBin(QString &error) {
     return false;
   }
 
+  if (!gst_element_link(audiosinkconverter, audiosinkresampler)) {
+    error = "Failed to link audio sink converter to audio sink resampler."_L1;
+    return false;
+  }
+
   {
     GstCaps *caps = gst_caps_new_empty_simple("audio/x-raw");
     if (!caps) {
@@ -938,16 +959,16 @@ bool GstEnginePipeline::InitAudioBin(QString &error) {
       qLog(Debug) << "Setting channels to" << channels_;
       gst_caps_set_simple(caps, "channels", G_TYPE_INT, channels_, nullptr);
     }
-    const bool link_filtered_result = gst_element_link_filtered(audiosinkconverter, audiosink_, caps);
+    const bool link_filtered_result = gst_element_link_filtered(audiosinkresampler, audiosink_, caps);
     gst_caps_unref(caps);
     if (!link_filtered_result) {
-      error = "Failed to link audio sink converter to audio sink with filter for "_L1 + output_;
+      error = "Failed to link audio sink resampler to audio sink with filter for "_L1 + output_;
       return false;
     }
   }
 
   {  // Add probes and handlers.
-    GstPad *pad = gst_element_get_static_pad(audioqueueconverter_, "src");
+    GstPad *pad = gst_element_get_static_pad(bufferprobe_, "src");
     if (pad) {
       buffer_probe_cb_id_ = gst_pad_add_probe(pad, GST_PAD_PROBE_TYPE_BUFFER, BufferProbeCallback, this, nullptr);
       gst_object_unref(pad);

src/engine/gstenginepipeline.h

@@ -355,7 +355,6 @@ class GstEnginePipeline : public QObject {
   GstElement *audiobin_;
   GstElement *audiosink_;
   GstElement *audioqueue_;
-  GstElement *audioqueueconverter_;
   GstElement *volume_;
   GstElement *volume_sw_;
   GstElement *volume_fading_;
@@ -364,6 +363,7 @@ class GstEnginePipeline : public QObject {
   GstElement *equalizer_;
   GstElement *equalizer_preamp_;
   GstElement *eventprobe_;
+  GstElement *bufferprobe_;
 
   std::optional<gulong> upstream_events_probe_cb_id_;
   std::optional<gulong> buffer_probe_cb_id_;

src/main.cpp

@@ -93,10 +93,6 @@
 #  include "discord/richpresence.h"
 #endif
 
-#ifdef HAVE_WINDOWS_MEDIA_CONTROLS
-#  include "core/windowsmediacontroller.h"
-#endif
-
 #include "core/iconloader.h"
 #include "core/commandlineoptions.h"
 #include "core/networkproxyfactory.h"
@@ -369,11 +365,6 @@ int main(int argc, char *argv[]) {
 #endif
                options);
 
-#ifdef HAVE_WINDOWS_MEDIA_CONTROLS
-  // Initialize Windows Media Transport Controls
-  WindowsMediaController windows_media_controller(reinterpret_cast<HWND>(w.winId()), app.player(), app.playlist_manager(), app.current_albumcover_loader());
-#endif
-
 #ifdef Q_OS_MACOS
   mac::EnableFullScreen(w);
 #endif  // Q_OS_MACOS

src/playlist/playlistbackend.cpp

@@ -56,7 +56,7 @@ using namespace Qt::Literals::StringLiterals;
 using std::make_shared;
 
 namespace {
-constexpr int kSongTableJoins = 2;
+constexpr int kSongTableJoins = 3;
 }
 
 PlaylistBackend::PlaylistBackend(const SharedPtr<Database> database,
@@ -186,10 +186,12 @@ PlaylistBackend::Playlist PlaylistBackend::GetPlaylist(const int id) {
 
 QString PlaylistBackend::PlaylistItemsQuery() {
 
-  return QStringLiteral("SELECT %1, %2, p.type FROM playlist_items AS p "
+  return QStringLiteral("SELECT %1, %2, %3, p.type FROM playlist_items AS p "
                         "LEFT JOIN songs ON p.type = songs.source AND p.collection_id = songs.ROWID "
+                        "LEFT JOIN dropbox_songs ON p.type = dropbox_songs.source AND p.collection_id = dropbox_songs.ROWID "
                         "WHERE p.playlist = :playlist"
                         ).arg(Song::JoinSpec(u"songs"_s),
+                              Song::JoinSpec(u"dropbox_songs"_s),
                               Song::JoinSpec(u"p"_s));
 
 }

src/playlist/playlistitem.cpp

@@ -47,6 +47,8 @@ PlaylistItemPtr PlaylistItem::NewFromSource(const Song::Source source) {
 
   switch (source) {
     case Song::Source::Collection:
+    case Song::Source::Dropbox:
+    case Song::Source::OneDrive:
       return make_shared<CollectionPlaylistItem>(source);
     case Song::Source::Subsonic:
     case Song::Source::Tidal:
@@ -72,6 +74,8 @@ PlaylistItemPtr PlaylistItem::NewFromSong(const Song &song) {
 
   switch (song.source()) {
     case Song::Source::Collection:
+    case Song::Source::Dropbox:
+    case Song::Source::OneDrive:
       return make_shared<CollectionPlaylistItem>(song);
     case Song::Source::Subsonic:
     case Song::Source::Tidal:

src/playlist/songloaderinserter.cpp

@@ -80,12 +80,13 @@ void SongLoaderInserter::Load(Playlist *destination, const int row, const bool p
       songs_ << loader->songs();
       playlist_name_ = loader->playlist_name();
     }
-    else {
-      const QStringList errors = loader->errors();
-      for (const QString &error : errors) {
-        Q_EMIT Error(error);
-      }
+    
+    // Always check for errors, even on success (e.g., playlist parsed but some songs failed to load)
+    const QStringList errors = loader->errors();
+    for (const QString &error : errors) {
+      Q_EMIT Error(error);
     }
+    
     delete loader;
   }
 
@@ -192,11 +193,13 @@ void SongLoaderInserter::AsyncLoad() {
     const SongLoader::Result result = loader->LoadFilenamesBlocking();
     task_manager_->SetTaskProgress(async_load_id, static_cast<quint64>(++async_progress));
 
+    // Always check for errors, even on success (e.g., playlist parsed but some songs failed to load)
+    const QStringList errors = loader->errors();
+    for (const QString &error : errors) {
+      Q_EMIT Error(error);
+    }
+
     if (result == SongLoader::Result::Error) {
-      const QStringList errors = loader->errors();
-      for (const QString &error : errors) {
-        Q_EMIT Error(error);
-      }
       continue;
     }
 

src/playlist/songplaylistitem.cpp

@@ -34,7 +34,7 @@ SongPlaylistItem::SongPlaylistItem(const Song::Source source) : PlaylistItem(sou
 SongPlaylistItem::SongPlaylistItem(const Song &song) : PlaylistItem(song.source()), song_(song) {}
 
 bool SongPlaylistItem::InitFromQuery(const SqlRow &query) {
-  song_.InitFromQuery(query, false, static_cast<int>(Song::kRowIdColumns.count()));
+  song_.InitFromQuery(query, false, static_cast<int>(Song::kRowIdColumns.count() * 2));
   return true;
 }
 

src/playlist/streamplaylistitem.cpp

@@ -47,7 +47,7 @@ void StreamPlaylistItem::InitMetadata() {
 
 bool StreamPlaylistItem::InitFromQuery(const SqlRow &query) {
 
-  song_.InitFromQuery(query, false, static_cast<int>(Song::kRowIdColumns.count()));
+  song_.InitFromQuery(query, false, static_cast<int>(Song::kRowIdColumns.count() * 2));
   InitMetadata();
   return true;
 

src/playlistparsers/parserbase.cpp

@@ -112,10 +112,18 @@ void ParserBase::LoadSong(const QString &filename_or_url, const qint64 beginning
     }
   }
 
+  // Check if the file exists before trying to read it
+  if (!QFile::exists(filename)) {
+    qLog(Error) << "File does not exist:" << filename;
+    Q_EMIT Error(tr("File %1 does not exist").arg(filename));
+    return;
+  }
+
   if (tagreader_client_) {
     const TagReaderResult result = tagreader_client_->ReadFileBlocking(filename, song);
     if (!result.success()) {
       qLog(Error) << "Could not read file" << filename << result.error_string();
+      Q_EMIT Error(tr("Could not read file %1: %2").arg(filename, result.error_string()));
     }
   }
 

src/settings/dropboxsettingspage.cpp

@@ -0,0 +1,144 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <QObject>
+#include <QVariant>
+#include <QByteArray>
+#include <QString>
+#include <QSettings>
+#include <QCheckBox>
+#include <QComboBox>
+#include <QLineEdit>
+#include <QPushButton>
+#include <QSpinBox>
+#include <QMessageBox>
+#include <QEvent>
+
+#include "constants/dropboxsettings.h"
+#include "core/settings.h"
+#include "core/iconloader.h"
+#include "widgets/loginstatewidget.h"
+#include "dropbox/dropboxservice.h"
+#include "settingsdialog.h"
+#include "dropboxsettingspage.h"
+#include "ui_dropboxsettingspage.h"
+
+using namespace Qt::Literals::StringLiterals;
+using namespace DropboxSettings;
+
+DropboxSettingsPage::DropboxSettingsPage(SettingsDialog *dialog, const SharedPtr<DropboxService> service, QWidget *parent)
+    : SettingsPage(dialog, parent),
+      ui_(new Ui_DropboxSettingsPage),
+      service_(service) {
+
+  Q_ASSERT(service);
+
+  ui_->setupUi(this);
+
+  setWindowIcon(IconLoader::Load(u"dropbox"_s));
+
+  ui_->login_state->AddCredentialGroup(ui_->widget_authorization);
+
+  QObject::connect(ui_->button_login, &QPushButton::clicked, this, &DropboxSettingsPage::LoginClicked);
+  QObject::connect(ui_->button_reset, &QPushButton::clicked, this, &DropboxSettingsPage::ResetClicked);
+  QObject::connect(ui_->login_state, &LoginStateWidget::LogoutClicked, this, &DropboxSettingsPage::LogoutClicked);
+
+  QObject::connect(this, &DropboxSettingsPage::Authorize, &*service_, &DropboxService::Authenticate);
+  QObject::connect(&*service_, &StreamingService::LoginFailure, this, &DropboxSettingsPage::LoginFailure);
+  QObject::connect(&*service_, &StreamingService::LoginSuccess, this, &DropboxSettingsPage::LoginSuccess);
+
+  dialog->installEventFilter(this);
+
+}
+
+DropboxSettingsPage::~DropboxSettingsPage() {
+  delete ui_;
+}
+
+void DropboxSettingsPage::Load() {
+
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+  ui_->enable->setChecked(s.value(kEnabled, false).toBool());
+  s.endGroup();
+
+  if (service_->authenticated()) ui_->login_state->SetLoggedIn(LoginStateWidget::State::LoggedIn);
+
+  Init(ui_->layout_dropboxsettingspage->parentWidget());
+
+  if (!Settings().childGroups().contains(QLatin1String(kSettingsGroup))) set_changed();
+
+}
+
+void DropboxSettingsPage::Save() {
+
+  Settings s;
+  s.beginGroup(kSettingsGroup);
+  s.setValue(kEnabled, ui_->enable->isChecked());
+  s.endGroup();
+
+}
+
+void DropboxSettingsPage::LoginClicked() {
+
+  Q_EMIT Authorize();
+
+  ui_->button_login->setEnabled(false);
+
+}
+
+bool DropboxSettingsPage::eventFilter(QObject *object, QEvent *event) {
+
+  if (object == dialog() && event->type() == QEvent::Enter) {
+    ui_->button_login->setEnabled(true);
+  }
+
+  return SettingsPage::eventFilter(object, event);
+
+}
+
+void DropboxSettingsPage::LogoutClicked() {
+
+  service_->ClearSession();
+  ui_->button_login->setEnabled(true);
+  ui_->login_state->SetLoggedIn(LoginStateWidget::State::LoggedOut);
+
+}
+
+void DropboxSettingsPage::LoginSuccess() {
+
+  if (!isVisible()) return;
+  ui_->login_state->SetLoggedIn(LoginStateWidget::State::LoggedIn);
+  ui_->button_login->setEnabled(true);
+
+}
+
+void DropboxSettingsPage::LoginFailure(const QString &failure_reason) {
+
+  if (!isVisible()) return;
+  QMessageBox::warning(this, tr("Authentication failed"), failure_reason);
+  ui_->button_login->setEnabled(true);
+
+}
+
+void DropboxSettingsPage::ResetClicked() {
+
+  service_->Reset();
+
+}

src/settings/dropboxsettingspage.h

@@ -0,0 +1,58 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef DROPBOXSETTINGSPAGE_H
+#define DROPBOXSETTINGSPAGE_H
+
+#include <QObject>
+
+#include "includes/shared_ptr.h"
+#include "settingspage.h"
+
+class DropboxService;
+class Ui_DropboxSettingsPage;
+
+class DropboxSettingsPage : public SettingsPage {
+  Q_OBJECT
+
+ public:
+  explicit DropboxSettingsPage(SettingsDialog *dialog, const SharedPtr<DropboxService> service, QWidget *parent);
+  ~DropboxSettingsPage();
+
+  void Load() override;
+  void Save() override;
+
+  bool eventFilter(QObject *object, QEvent *event) override;
+
+ Q_SIGNALS:
+  void Authorize();
+
+ private Q_SLOTS:
+  void LoginClicked();
+  void LogoutClicked();
+  void LoginSuccess();
+  void LoginFailure(const QString &failure_reason);
+  void ResetClicked();
+
+ private:
+  Ui_DropboxSettingsPage *ui_;
+  const SharedPtr<DropboxService> service_;
+};
+
+#endif  // DROPBOXSETTINGSPAGE_H

src/settings/dropboxsettingspage.ui

@@ -0,0 +1,125 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>DropboxSettingsPage</class>
+ <widget class="QWidget" name="DropboxSettingsPage">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>569</width>
+    <height>491</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Dropbox</string>
+  </property>
+  <layout class="QVBoxLayout" name="layout_dropboxsettingspage">
+   <item>
+    <widget class="QLabel" name="label_info">
+     <property name="text">
+      <string>Strawberry can play music that you have uploaded to Dropbox</string>
+     </property>
+     <property name="wordWrap">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QCheckBox" name="enable">
+     <property name="text">
+      <string>Enable</string>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="LoginStateWidget" name="login_state" native="true"/>
+   </item>
+   <item>
+    <widget class="QWidget" name="widget_authorization" native="true">
+     <layout class="QVBoxLayout" name="verticalLayout">
+      <property name="leftMargin">
+       <number>28</number>
+      </property>
+      <property name="topMargin">
+       <number>0</number>
+      </property>
+      <property name="bottomMargin">
+       <number>0</number>
+      </property>
+      <item>
+       <layout class="QHBoxLayout" name="horizontalLayout">
+        <item>
+         <widget class="QPushButton" name="button_login">
+          <property name="text">
+           <string>Login</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <spacer name="spacer_login">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="layout_buttons">
+     <item>
+      <widget class="QPushButton" name="button_reset">
+       <property name="text">
+        <string>Reset cursor and songs</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="spacer_buttons">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <spacer name="spacer_bottom">
+     <property name="orientation">
+      <enum>Qt::Vertical</enum>
+     </property>
+     <property name="sizeHint" stdset="0">
+      <size>
+       <width>20</width>
+       <height>357</height>
+      </size>
+     </property>
+    </spacer>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>LoginStateWidget</class>
+   <extends>QWidget</extends>
+   <header>widgets/loginstatewidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>

src/settings/settingsdialog.cpp

@@ -90,6 +90,10 @@
 #  include "qobuz/qobuzservice.h"
 #  include "qobuzsettingspage.h"
 #endif
+#ifdef HAVE_DROPBOX
+#  include "dropbox/dropboxservice.h"
+#  include "dropboxsettingspage.h"
+#endif
 
 #include "ui_settingsdialog.h"
 
@@ -144,7 +148,7 @@ SettingsDialog::SettingsDialog(const SharedPtr<Player> player,
   AddPage(Page::Moodbar, new MoodbarSettingsPage(this, this), iface);
 #endif
 
-#if defined(HAVE_SUBSONIC) || defined(HAVE_TIDAL) || defined(HAVE_SPOTIFY) || defined(HAVE_QOBUZ)
+#if defined(HAVE_SUBSONIC) || defined(HAVE_TIDAL) || defined(HAVE_SPOTIFY) || defined(HAVE_QOBUZ) || defined(HAVE_DROPBOX)
   QTreeWidgetItem *streaming = AddCategory(tr("Streaming"));
 #endif
 
@@ -160,6 +164,9 @@ SettingsDialog::SettingsDialog(const SharedPtr<Player> player,
 #ifdef HAVE_QOBUZ
   AddPage(Page::Qobuz, new QobuzSettingsPage(this, streaming_services->Service<QobuzService>(), this), streaming);
 #endif
+#ifdef HAVE_DROPBOX
+  AddPage(Page::Dropbox, new DropboxSettingsPage(this, streaming_services->Service<DropboxService>(), this), streaming);
+#endif
 
   // List box
   QObject::connect(ui_->list, &QTreeWidget::currentItemChanged, this, &SettingsDialog::CurrentItemChanged);

src/settings/settingsdialog.h

@@ -93,6 +93,8 @@ class SettingsDialog : public QDialog {
     Tidal,
     Qobuz,
     Spotify,
+    Dropbox,
+    OneDrive,
   };
 
   enum Role {

src/streaming/cloudstoragestreamingservice.cpp

@@ -0,0 +1,134 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <memory>
+
+#include <QString>
+#include <QUrl>
+#include <QFileInfo>
+
+#include "core/logging.h"
+#include "core/database.h"
+#include "core/taskmanager.h"
+#include "core/song.h"
+#include "collection/collectionbackend.h"
+#include "collection/collectionmodel.h"
+#include "playlist/playlist.h"
+#include "cloudstoragestreamingservice.h"
+
+using namespace Qt::Literals::StringLiterals;
+using std::make_shared;
+
+CloudStorageStreamingService::CloudStorageStreamingService(const SharedPtr<TaskManager> task_manager,
+                                                           const SharedPtr<Database> database,
+                                                           const SharedPtr<TagReaderClient> tagreader_client,
+                                                           const SharedPtr<AlbumCoverLoader> albumcover_loader,
+                                                           const Song::Source source,
+                                                           const QString &name,
+                                                           const QString &url_scheme,
+                                                           const QString &settings_group,
+                                                           QObject *parent)
+    : StreamingService(source, name, url_scheme, settings_group, parent),
+      task_manager_(task_manager),
+      tagreader_client_(tagreader_client),
+      source_(source),
+      indexing_task_id_(-1),
+      indexing_task_progress_(0),
+      indexing_task_max_(0) {
+
+  collection_backend_ = make_shared<CollectionBackend>();
+  collection_backend_->moveToThread(database->thread());
+  collection_backend_->Init(database, task_manager, source, name + "_songs"_L1);
+  collection_model_ = new CollectionModel(collection_backend_, albumcover_loader, this);
+
+}
+
+void CloudStorageStreamingService::MaybeAddFileToDatabase(const QUrl &url, const QString &filename, const size_t size, const quint64 mtime, const QString &token_type, const QString &access_token) {
+
+  if (!IsSupportedFiletype(filename)) {
+    return;
+  }
+
+  if (indexing_task_id_ == -1) {
+    indexing_task_id_ = task_manager_->StartTask(tr("Indexing %1").arg(name()));
+    indexing_task_progress_ = 0;
+    indexing_task_max_ = 0;
+  }
+  indexing_task_max_++;
+  task_manager_->SetTaskProgress(indexing_task_id_, indexing_task_progress_, indexing_task_max_);
+
+  TagReaderReadStreamReplyPtr reply = tagreader_client_->ReadStreamAsync(url, filename, size, mtime, token_type, access_token);
+  pending_tagreader_replies_.append(reply);
+
+  SharedPtr<QMetaObject::Connection> connection = make_shared<QMetaObject::Connection>();
+  *connection = QObject::connect(&*reply, &TagReaderReadStreamReply::Finished, this, [this, reply, url, filename, connection]() {
+    ReadStreamFinished(reply, url, filename);
+    QObject::disconnect(*connection);
+  }, Qt::QueuedConnection);
+
+}
+
+void CloudStorageStreamingService::ReadStreamFinished(TagReaderReadStreamReplyPtr reply, const QUrl url, const QString filename) {
+
+  ++indexing_task_progress_;
+  if (indexing_task_progress_ >= indexing_task_max_) {
+    task_manager_->SetTaskFinished(indexing_task_id_);
+    indexing_task_id_ = -1;
+    Q_EMIT AllIndexingTasksFinished();
+  }
+  else {
+    task_manager_->SetTaskProgress(indexing_task_id_, indexing_task_progress_, indexing_task_max_);
+  }
+
+  if (!reply->result().success()) {
+    qLog(Error) << "Failed to read tags from stream, URL" << url << reply->result().error_string();
+    return;
+  }
+
+  Song song = reply->song();
+  song.set_source(source_);
+  song.set_directory_id(0);
+  QUrl song_url;
+  song_url.setScheme(url_scheme());
+  song_url.setPath(filename);
+  song.set_url(song_url);
+
+  collection_backend_->AddOrUpdateSongs(SongList() << song);
+
+}
+
+bool CloudStorageStreamingService::IsSupportedFiletype(const QString &filename) {
+
+  const QFileInfo fileinfo(filename);
+  return Song::kAcceptedExtensions.contains(fileinfo.suffix(), Qt::CaseInsensitive) && !Song::kRejectedExtensions.contains(fileinfo.suffix(), Qt::CaseInsensitive);
+
+}
+
+void CloudStorageStreamingService::AbortReadTagsReplies() {
+
+  qLog(Debug) << "Aborting the read tags replies";
+
+  pending_tagreader_replies_.clear();
+
+  task_manager_->SetTaskFinished(indexing_task_id_);
+  indexing_task_id_ = -1;
+
+  Q_EMIT AllIndexingTasksFinished();
+
+}

src/streaming/cloudstoragestreamingservice.h

@@ -0,0 +1,89 @@
+/*
+ * Strawberry Music Player
+ * Copyright 2025, Jonas Kvinge <jonas@jkvinge.net>
+ *
+ * Strawberry is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Strawberry is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef CLOUDSTORAGESTREAMINGSERVICE_H
+#define CLOUDSTORAGESTREAMINGSERVICE_H
+
+#include <QList>
+
+#include "includes/shared_ptr.h"
+#include "tagreader/tagreaderclient.h"
+#include "streamingservice.h"
+#include "covermanager/albumcovermanager.h"
+#include "collection/collectionmodel.h"
+
+class TaskManager;
+class Database;
+class TagReaderClient;
+class AlbumCoverLoader;
+class CollectionBackend;
+class CollectionModel;
+class NetworkAccessManager;
+
+class CloudStorageStreamingService : public StreamingService {
+  Q_OBJECT
+
+ public:
+  explicit CloudStorageStreamingService(const SharedPtr<TaskManager> task_manager,
+                                        const SharedPtr<Database> database,
+                                        const SharedPtr<TagReaderClient> tagreader_client,
+                                        const SharedPtr<AlbumCoverLoader> albumcover_loader,
+                                        const Song::Source source,
+                                        const QString &name,
+                                        const QString &url_scheme,
+                                        const QString &settings_group,
+                                        QObject *parent = nullptr);
+
+  bool is_indexing() const { return indexing_task_id_ != -1; }
+
+  SharedPtr<CollectionBackend> collection_backend() const { return collection_backend_; }
+  CollectionModel *collection_model() const { return collection_model_; }
+  CollectionFilter *collection_filter_model() const { return collection_model_->filter(); }
+
+  SharedPtr<CollectionBackend> songs_collection_backend() override { return collection_backend_; }
+  CollectionModel *songs_collection_model() override { return collection_model_; }
+  CollectionFilter *songs_collection_filter_model() override { return collection_model_->filter(); }
+
+  virtual void MaybeAddFileToDatabase(const QUrl &url, const QString &filename, const size_t size, const quint64 mtime, const QString &token_type = QString(), const QString &access_token = QString());
+  static bool IsSupportedFiletype(const QString &filename);
+
+ Q_SIGNALS:
+  void AllIndexingTasksFinished();
+
+ protected:
+  void AbortReadTagsReplies();
+
+ protected Q_SLOTS:
+  void ReadStreamFinished(TagReaderReadStreamReplyPtr reply, const QUrl url, const QString filename);
+
+ protected:
+  const SharedPtr<TaskManager> task_manager_;
+  const SharedPtr<TagReaderClient> tagreader_client_;
+  SharedPtr<CollectionBackend> collection_backend_;
+  CollectionModel *collection_model_;
+  QList<TagReaderReplyPtr> pending_tagreader_replies_;
+
+ private:
+  Song::Source source_;
+  int indexing_task_id_;
+  int indexing_task_progress_;
+  int indexing_task_max_;
+};
+
+#endif  // CLOUDSTORAGESTREAMINGSERVICE_H

src/translations/strawberry_ru_RU.ts

@@ -5526,7 +5526,7 @@ Are you sure you want to continue?</source>
     <name>RadioParadiseService</name>
     <message>
       <source>Getting %1 channels</source>
-      <translation>Получение %1 каналов</translation>
+      <translation>Получение каналов %1</translation>
     </message>
   </context>
   <context>
@@ -6191,7 +6191,7 @@ Are you sure you want to continue?</source>
     <name>SomaFMService</name>
     <message>
       <source>Getting %1 channels</source>
-      <translation>Получение %1 каналов</translation>
+      <translation>Получение каналов %1</translation>
     </message>
   </context>
   <context>

src/translations/strawberry_tr_TR.ts

@@ -1187,7 +1187,7 @@ If there are no matches then it will use the largest image in the directory.</tr
     </message>
     <message>
       <source>Queue to play next</source>
-      <translation>Sıradaki Yap</translation>
+      <translation>Sıradaki yap</translation>
     </message>
     <message>
       <source>Search for this</source>
@@ -3496,7 +3496,7 @@ If there are no matches then it will use the largest image in the directory.</tr
     </message>
     <message>
       <source>Queue to play next</source>
-      <translation>Sıradaki Yap</translation>
+      <translation>Sıradaki yap</translation>
     </message>
     <message>
       <source>Unskip track</source>
@@ -4431,7 +4431,7 @@ If there are no matches then it will use the largest image in the directory.</tr
     </message>
     <message>
       <source>&amp;Hide %1</source>
-      <translation>&amp;%1&apos;i sakla</translation>
+      <translation>&amp;%1 ögesini sakla</translation>
     </message>
   </context>
   <context>
@@ -6407,7 +6407,7 @@ Devam etmek istediğinizden emin misiniz?</translation>
     </message>
     <message>
       <source>Queue to play next</source>
-      <translation>Sıradaki Yap</translation>
+      <translation>Sıradaki yap</translation>
     </message>
     <message>
       <source>Remove from favorites</source>

src/utilities/coverutils.cpp

@@ -142,6 +142,8 @@ QString CoverUtils::CoverFilenameFromSource(const Song::Source source, const QUr
     case Song::Source::Stream:
     case Song::Source::SomaFM:
     case Song::Source::RadioParadise:
+    case Song::Source::Dropbox:
+    case Song::Source::OneDrive:
     case Song::Source::Unknown:
       filename = QString::fromLatin1(Sha1CoverHash(artist, album).toHex());
       break;