Merge pull request #5102 from owncloud/chunking-ng

Chunking ng

22 files changed, 1383 insertions, 474 deletions

diff --git a/src/libsync/CMakeLists.txt b/src/libsync/CMakeLists.txt
index abfb2cfd9..92b69c152 100644
--- a/src/libsync/CMakeLists.txt
+++ b/src/libsync/CMakeLists.txt
@@ -50,6 +50,8 @@ set(libsync_SRCS
     propagatorjobs.cpp
     propagatedownload.cpp
     propagateupload.cpp
+    propagateuploadv1.cpp
+    propagateuploadng.cpp
     propagateremotedelete.cpp
     propagateremotemove.cpp
     propagateremotemkdir.cpp
diff --git a/src/libsync/account.cpp b/src/libsync/account.cpp
index 5c6450673..3dfa7bcb8 100644
--- a/src/libsync/account.cpp
+++ b/src/libsync/account.cpp
@@ -75,11 +75,19 @@ AccountPtr Account::sharedFromThis()
     return _sharedThis.toStrongRef();
 }
 
+QString Account::user() const
+{
+    return _user.isEmpty() ? _credentials->user() : _user;
+}
+
+void Account::setUser(const QString &user)
+{
+    _user = user;
+}
 
 QString Account::displayName() const
 {
-    auto user = _credentials->user();
-    QString dn = QString("%1@%2").arg(user, _url.host());
+    QString dn = QString("%1@%2").arg(user(), _url.host());
     int port = url().port();
     if (port > 0 && port != 80 && port != 443) {
         dn.append(QLatin1Char(':'));
diff --git a/src/libsync/account.h b/src/libsync/account.h
index 4ff73748e..36e606ebf 100644
--- a/src/libsync/account.h
+++ b/src/libsync/account.h
@@ -68,6 +68,10 @@ public:
 
     AccountPtr sharedFromThis();
 
+    /// The user that can be used in dav url
+    QString user() const;
+    void setUser(const QString &user);
+
     /// The name of the account as shown in the toolbar
     QString displayName() const;
 
@@ -198,6 +202,7 @@ private:
 
     QWeakPointer<Account> _sharedThis;
     QString _id;
+    QString _user;
     QMap<QString, QVariant> _settingsMap;
     QUrl _url;
     QList<QSslCertificate> _approvedCerts;
diff --git a/src/libsync/capabilities.cpp b/src/libsync/capabilities.cpp
index ca72a70bb..6bf352f9a 100644
--- a/src/libsync/capabilities.cpp
+++ b/src/libsync/capabilities.cpp
@@ -107,4 +107,10 @@ QByteArray Capabilities::uploadChecksumType() const
     return QByteArray();
 }
 
+bool Capabilities::chunkingNg() const
+{
+    return _capabilities["dav"].toMap()["chunking"].toByteArray() >= "1.0";
+}
+
+
 }
diff --git a/src/libsync/capabilities.h b/src/libsync/capabilities.h
index 04eef6e39..5f1936aba 100644
--- a/src/libsync/capabilities.h
+++ b/src/libsync/capabilities.h
@@ -39,6 +39,7 @@ public:
     bool sharePublicLinkEnforceExpireDate() const;
     int  sharePublicLinkExpireDateDays() const;
     bool shareResharing() const;
+    bool chunkingNg() const;
 
     /// returns true if the capabilities report notifications
     bool notificationsAvailable() const;
diff --git a/src/libsync/connectionvalidator.cpp b/src/libsync/connectionvalidator.cpp
index a1eead282..d9f0c3e16 100644
--- a/src/libsync/connectionvalidator.cpp
+++ b/src/libsync/connectionvalidator.cpp
@@ -229,10 +229,26 @@ void ConnectionValidator::slotCapabilitiesRecieved(const QVariantMap &json)
     auto caps = json.value("ocs").toMap().value("data").toMap().value("capabilities");
     qDebug() << "Server capabilities" << caps;
     _account->setCapabilities(caps.toMap());
-    reportResult(Connected);
-    return;
+    fetchUser();
 }
 
+void ConnectionValidator::fetchUser()
+{
+
+    JsonApiJob *job = new JsonApiJob(_account, QLatin1String("ocs/v1.php/cloud/user"), this);
+    job->setTimeout(timeoutToUseMsec);
+    QObject::connect(job, SIGNAL(jsonReceived(QVariantMap, int)), this, SLOT(slotUserFetched(QVariantMap)));
+    job->start();
+}
+
+void ConnectionValidator::slotUserFetched(const QVariantMap &json)
+{
+    QString user = json.value("ocs").toMap().value("data").toMap().value("id").toString();
+    if (!user.isEmpty()) {
+        _account->setUser(user);
+    }
+    reportResult(Connected);
+}
 
 void ConnectionValidator::reportResult(Status status)
 {
diff --git a/src/libsync/connectionvalidator.h b/src/libsync/connectionvalidator.h
index e1264628a..b97d665ec 100644
--- a/src/libsync/connectionvalidator.h
+++ b/src/libsync/connectionvalidator.h
@@ -27,7 +27,7 @@ namespace OCC {
  * This is a job-like class to check that the server is up and that we are connected.
  * There are two entry points: checkServerAndAuth and checkAuthentication
  * checkAuthentication is the quick version that only does the propfind
- * while checkServerAndAuth is doing the 3 calls.
+ * while checkServerAndAuth is doing the 4 calls.
  *
  * We cannot use the capabilites call to test the login and the password because of
  * https://github.com/owncloud/core/issues/12930
@@ -60,7 +60,15 @@ namespace OCC {
   +-> checkServerCapabilities (cloud/capabilities)
         JsonApiJob
         |
-        +-> slotCapabilitiesRecieved --> X
+        +-> slotCapabilitiesRecieved -+
+                                      |
+  +-----------------------------------+
+  |
+  +-> fetchUser
+        PropfindJob
+        |
+        +-> slotUserFetched --> X
+
     \endcode
  */
 class OWNCLOUDSYNC_EXPORT ConnectionValidator : public QObject
@@ -109,10 +117,12 @@ protected slots:
     void slotAuthSuccess();
 
     void slotCapabilitiesRecieved(const QVariantMap&);
+    void slotUserFetched(const QVariantMap &);
 
 private:
     void reportResult(Status status);
     void checkServerCapabilities();
+    void fetchUser();
 
     QStringList _errors;
     AccountPtr   _account;
diff --git a/src/libsync/networkjobs.cpp b/src/libsync/networkjobs.cpp
index e6d5a0e06..10fd3d545 100644
--- a/src/libsync/networkjobs.cpp
+++ b/src/libsync/networkjobs.cpp
@@ -106,14 +106,24 @@ MkColJob::MkColJob(AccountPtr account, const QString &path, QObject *parent)
 {
 }
 
+MkColJob::MkColJob(AccountPtr account, const QUrl &url,
+                   const QMap<QByteArray, QByteArray> &extraHeaders, QObject *parent)
+    : AbstractNetworkJob(account, QString(), parent), _url(url), _extraHeaders(extraHeaders)
+{
+}
+
 void MkColJob::start()
 {
    // add 'Content-Length: 0' header (see https://github.com/owncloud/client/issues/3256)
    QNetworkRequest req;
    req.setRawHeader("Content-Length", "0");
+   for(auto it = _extraHeaders.constBegin(); it != _extraHeaders.constEnd(); ++it) {
+        req.setRawHeader(it.key(), it.value());
+   }
 
    // assumes ownership
-   QNetworkReply *reply = davRequest("MKCOL", path(), req);
+   QNetworkReply *reply = _url.isValid() ?  davRequest("MKCOL", _url, req)
+        : davRequest("MKCOL", path(), req);
    setReply(reply);
    setupConnections(reply);
    AbstractNetworkJob::start();
@@ -264,6 +274,11 @@ LsColJob::LsColJob(AccountPtr account, const QString &path, QObject *parent)
 {
 }
 
+LsColJob::LsColJob(AccountPtr account, const QUrl &url, QObject *parent)
+    : AbstractNetworkJob(account, QString(), parent), _url(url)
+{
+}
+
 void LsColJob::setProperties(QList<QByteArray> properties)
 {
     _properties = properties;
@@ -307,7 +322,8 @@ void LsColJob::start()
     QBuffer *buf = new QBuffer(this);
     buf->setData(xml);
     buf->open(QIODevice::ReadOnly);
-    QNetworkReply *reply = davRequest("PROPFIND", path(), req, buf);
+    QNetworkReply *reply = _url.isValid() ?  davRequest("PROPFIND", _url, req, buf)
+        : davRequest("PROPFIND", path(), req, buf);
     buf->setParent(reply);
     setReply(reply);
     setupConnections(reply);
diff --git a/src/libsync/networkjobs.h b/src/libsync/networkjobs.h
index c2cc978c4..f7a37d950 100644
--- a/src/libsync/networkjobs.h
+++ b/src/libsync/networkjobs.h
@@ -62,6 +62,7 @@ class OWNCLOUDSYNC_EXPORT LsColJob : public AbstractNetworkJob {
     Q_OBJECT
 public:
     explicit LsColJob(AccountPtr account, const QString &path, QObject *parent = 0);
+    explicit LsColJob(AccountPtr account, const QUrl &url, QObject *parent = 0);
     void start() Q_DECL_OVERRIDE;
     QHash<QString, qint64> _sizes;
 
@@ -87,6 +88,7 @@ private slots:
 
 private:
     QList<QByteArray> _properties;
+    QUrl _url; // Used instead of path() if the url is specified in the constructor
 };
 
 /**
@@ -170,8 +172,12 @@ private:
  */
 class OWNCLOUDSYNC_EXPORT MkColJob : public AbstractNetworkJob {
     Q_OBJECT
+    QUrl _url; // Only used if the constructor taking a url is taken.
+    QMap<QByteArray, QByteArray> _extraHeaders;
 public:
     explicit MkColJob(AccountPtr account, const QString &path, QObject *parent = 0);
+    explicit MkColJob(AccountPtr account, const QUrl &url,
+                      const QMap<QByteArray, QByteArray> &extraHeaders, QObject *parent = 0);
     void start() Q_DECL_OVERRIDE;
 
 signals:
diff --git a/src/libsync/owncloudpropagator.cpp b/src/libsync/owncloudpropagator.cpp
index 575d72abc..d8ad23ea9 100644
--- a/src/libsync/owncloudpropagator.cpp
+++ b/src/libsync/owncloudpropagator.cpp
@@ -270,7 +270,14 @@ PropagateItemJob* OwncloudPropagator::createJob(const SyncFileItemPtr &item) {
                 job->setDeleteExistingFolder(deleteExisting);
                 return job;
             } else {
-                auto job = new PropagateUploadFile(this, item);
+                PropagateUploadFileCommon *job = 0;
+                static const auto chunkng = qgetenv("OWNCLOUD_CHUNKING_NG");
+                if (item->_size > chunkSize()
+                        && (account()->capabilities().chunkingNg() || chunkng == "1") && chunkng != "0") {
+                    job = new PropagateUploadFileNG(this, item);
+                } else {
+                    job = new PropagateUploadFileV1(this, item);
+                }
                 job->setDeleteExisting(deleteExisting);
                 return job;
             }
diff --git a/src/libsync/owncloudpropagator.h b/src/libsync/owncloudpropagator.h
index b9862eaaf..3c6930662 100644
--- a/src/libsync/owncloudpropagator.h
+++ b/src/libsync/owncloudpropagator.h
@@ -380,10 +380,11 @@ private:
 #if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
     // access to signals which are protected in Qt4
     friend class PropagateDownloadFile;
-    friend class PropagateUploadFile;
     friend class PropagateLocalMkdir;
     friend class PropagateLocalRename;
     friend class PropagateRemoteMove;
+    friend class PropagateUploadFileV1;
+    friend class PropagateUploadFileNG;
 #endif
 };
 
diff --git a/src/libsync/propagateremotedelete.cpp b/src/libsync/propagateremotedelete.cpp
index 30b06fe41..9be19c309 100644
--- a/src/libsync/propagateremotedelete.cpp
+++ b/src/libsync/propagateremotedelete.cpp
@@ -22,11 +22,14 @@ DeleteJob::DeleteJob(AccountPtr account, const QString& path, QObject* parent)
     : AbstractNetworkJob(account, path, parent)
 { }
 
+DeleteJob::DeleteJob(AccountPtr account, const QUrl& url, QObject* parent)
+    : AbstractNetworkJob(account, QString(), parent), _url(url)
+{ }
 
 void DeleteJob::start()
 {
     QNetworkRequest req;
-    setReply(davRequest("DELETE", path(), req));
+    setReply(_url.isValid() ? davRequest("DELETE", _url, req) : davRequest("DELETE", path(), req));
     setupConnections(reply());
 
     if( reply()->error() != QNetworkReply::NoError ) {
diff --git a/src/libsync/propagateremotedelete.h b/src/libsync/propagateremotedelete.h
index 0473042c8..44f4ebd3b 100644
--- a/src/libsync/propagateremotedelete.h
+++ b/src/libsync/propagateremotedelete.h
@@ -24,8 +24,10 @@ namespace OCC {
  */
 class DeleteJob : public AbstractNetworkJob {
     Q_OBJECT
+    QUrl _url; // Only used if the constructor taking a url is taken.
 public:
     explicit DeleteJob(AccountPtr account, const QString& path, QObject* parent = 0);
+    explicit DeleteJob(AccountPtr account, const QUrl& url, QObject* parent = 0);
 
     void start() Q_DECL_OVERRIDE;
     bool finished() Q_DECL_OVERRIDE;
diff --git a/src/libsync/propagateremotemove.cpp b/src/libsync/propagateremotemove.cpp
index bc0b4efa1..bcceec709 100644
--- a/src/libsync/propagateremotemove.cpp
+++ b/src/libsync/propagateremotemove.cpp
@@ -28,12 +28,20 @@ MoveJob::MoveJob(AccountPtr account, const QString& path,
     : AbstractNetworkJob(account, path, parent), _destination(destination)
 { }
 
+MoveJob::MoveJob(AccountPtr account, const QUrl& url, const QString &destination,
+                 QMap<QByteArray, QByteArray> extraHeaders, QObject* parent)
+    : AbstractNetworkJob(account, QString(), parent), _destination(destination), _url(url)
+    , _extraHeaders(extraHeaders)
+{ }
 
 void MoveJob::start()
 {
     QNetworkRequest req;
     req.setRawHeader("Destination", QUrl::toPercentEncoding(_destination, "/"));
-    setReply(davRequest("MOVE", path(), req));
+    for(auto it = _extraHeaders.constBegin(); it != _extraHeaders.constEnd(); ++it) {
+        req.setRawHeader(it.key(), it.value());
+    }
+    setReply(_url.isValid() ? davRequest("MOVE", _url, req) : davRequest("MOVE", path(), req));
     setupConnections(reply());
 
     if( reply()->error() != QNetworkReply::NoError ) {
diff --git a/src/libsync/propagateremotemove.h b/src/libsync/propagateremotemove.h
index 829e7a1fb..8d213e430 100644
--- a/src/libsync/propagateremotemove.h
+++ b/src/libsync/propagateremotemove.h
@@ -25,8 +25,12 @@ namespace OCC {
 class MoveJob : public AbstractNetworkJob {
     Q_OBJECT
     const QString _destination;
+    const QUrl _url; // Only used (instead of path) when the constructor taking an URL is used
+    QMap<QByteArray, QByteArray> _extraHeaders;
 public:
     explicit MoveJob(AccountPtr account, const QString& path, const QString &destination, QObject* parent = 0);
+    explicit MoveJob(AccountPtr account, const QUrl& url, const QString &destination,
+                     QMap<QByteArray, QByteArray> _extraHeaders, QObject* parent = 0);
 
     void start() Q_DECL_OVERRIDE;
     bool finished() Q_DECL_OVERRIDE;
diff --git a/src/libsync/propagateupload.cpp b/src/libsync/propagateupload.cpp
index 2783ac9a5..388752ad9 100644
--- a/src/libsync/propagateupload.cpp
+++ b/src/libsync/propagateupload.cpp
@@ -72,7 +72,8 @@ void PUTFileJob::start() {
         req.setRawHeader(it.key(), it.value());
     }
 
-    setReply(davRequest("PUT", path(), req, _device.data()));
+    setReply(_url.isValid() ?  davRequest("PUT", _url, req, _device.data())
+        : davRequest("PUT", path(), req, _device.data()));
     setupConnections(reply());
 
     if( reply()->error() != QNetworkReply::NoError ) {
@@ -184,7 +185,13 @@ bool PollJob::finished()
     return true;
 }
 
-void PropagateUploadFile::start()
+void PropagateUploadFileCommon::setDeleteExisting(bool enabled)
+{
+    _deleteExisting = enabled;
+}
+
+
+void PropagateUploadFileCommon::start()
 {
     if (_propagator->_abortRequested.fetchAndAddRelaxed(0)) {
         return;
@@ -205,7 +212,7 @@ void PropagateUploadFile::start()
     job->start();
 }
 
-void PropagateUploadFile::slotComputeContentChecksum()
+void PropagateUploadFileCommon::slotComputeContentChecksum()
 {
     if (_propagator->_abortRequested.fetchAndAddRelaxed(0)) {
         return;
@@ -239,12 +246,7 @@ void PropagateUploadFile::slotComputeContentChecksum()
     computeChecksum->start(filePath);
 }
 
-void PropagateUploadFile::setDeleteExisting(bool enabled)
-{
-    _deleteExisting = enabled;
-}
-
-void PropagateUploadFile::slotComputeTransmissionChecksum(const QByteArray& contentChecksumType, const QByteArray& contentChecksum)
+void PropagateUploadFileCommon::slotComputeTransmissionChecksum(const QByteArray& contentChecksumType, const QByteArray& contentChecksum)
 {
     _item->_contentChecksum = contentChecksum;
     _item->_contentChecksumType = contentChecksumType;
@@ -276,7 +278,7 @@ void PropagateUploadFile::slotComputeTransmissionChecksum(const QByteArray& cont
     computeChecksum->start(filePath);
 }
 
-void PropagateUploadFile::slotStartUpload(const QByteArray& transmissionChecksumType, const QByteArray& transmissionChecksum)
+void PropagateUploadFileCommon::slotStartUpload(const QByteArray& transmissionChecksumType, const QByteArray& transmissionChecksum)
 {
     // Remove ourselfs from the list of active job, before any posible call to done()
     // When we start chunks, we will add it again, once for every chunks.
@@ -322,23 +324,7 @@ void PropagateUploadFile::slotStartUpload(const QByteArray& transmissionChecksum
         return;
     }
 
-    _chunkCount = std::ceil(fileSize/double(chunkSize()));
-    _startChunk = 0;
-    _transferId = qrand() ^ _item->_modtime ^ (_item->_size << 16);
-
-    const SyncJournalDb::UploadInfo progressInfo = _propagator->_journal->getUploadInfo(_item->_file);
-
-    if (progressInfo._valid && Utility::qDateTimeToTime_t(progressInfo._modtime) == _item->_modtime ) {
-        _startChunk = progressInfo._chunk;
-        _transferId = progressInfo._transferid;
-        qDebug() << Q_FUNC_INFO << _item->_file << ": Resuming from chunk " << _startChunk;
-    }
-
-    _currentChunk = 0;
-    _duration.start();
-
-    emit progress(*_item, 0);
-    this->startNextChunk();
+    doStartUpload();
 }
 
 UploadDevice::UploadDevice(BandwidthManager *bwm)
@@ -476,371 +462,7 @@ void UploadDevice::setChoked(bool b) {
     }
 }
 
-void PropagateUploadFile::startNextChunk()
-{
-    if (_propagator->_abortRequested.fetchAndAddRelaxed(0))
-        return;
-
-    if (! _jobs.isEmpty() &&  _currentChunk + _startChunk >= _chunkCount - 1) {
-        // Don't do parallel upload of chunk if this might be the last chunk because the server cannot handle that
-        // https://github.com/owncloud/core/issues/11106
-        // We return now and when the _jobs are finished we will proceed with the last chunk
-        // NOTE: Some other parts of the code such as slotUploadProgress also assume that the last chunk
-        // is sent last.
-        return;
-    }
-    quint64 fileSize = _item->_size;
-    QMap<QByteArray, QByteArray> headers;
-    headers["OC-Total-Length"] = QByteArray::number(fileSize);
-    headers["OC-Async"] = "1";
-    headers["OC-Chunk-Size"]= QByteArray::number(quint64(chunkSize()));
-    headers["Content-Type"] = "application/octet-stream";
-    headers["X-OC-Mtime"] = QByteArray::number(qint64(_item->_modtime));
-
-    if(_item->_file.contains(".sys.admin#recall#")) {
-        // This is a file recall triggered by the admin.  Note: the
-        // recall list file created by the admin and downloaded by the
-        // client (.sys.admin#recall#) also falls into this category
-        // (albeit users are not supposed to mess up with it)
-
-        // We use a special tag header so that the server may decide to store this file away in some admin stage area
-        // And not directly in the user's area (which would trigger redownloads etc).
-        headers["OC-Tag"] = ".sys.admin#recall#";
-    }
-
-    if (!_item->_etag.isEmpty() && _item->_etag != "empty_etag"
-            && _item->_instruction != CSYNC_INSTRUCTION_NEW  // On new files never send a If-Match
-            && _item->_instruction != CSYNC_INSTRUCTION_TYPE_CHANGE
-            && !_deleteExisting
-            ) {
-        // We add quotes because the owncloud server always adds quotes around the etag, and
-        //  csync_owncloud.c's owncloud_file_id always strips the quotes.
-        headers["If-Match"] = '"' + _item->_etag + '"';
-    }
-
-    QString path = _item->_file;
-
-    UploadDevice *device = new UploadDevice(&_propagator->_bandwidthManager);
-    qint64 chunkStart = 0;
-    qint64 currentChunkSize = fileSize;
-    bool isFinalChunk = false;
-    if (_chunkCount > 1) {
-        int sendingChunk = (_currentChunk + _startChunk) % _chunkCount;
-        // XOR with chunk size to make sure everything goes well if chunk size changes between runs
-        uint transid = _transferId ^ chunkSize();
-        qDebug() << "Upload chunk" << sendingChunk << "of" << _chunkCount << "transferid(remote)=" << transid;
-        path +=  QString("-chunking-%1-%2-%3").arg(transid).arg(_chunkCount).arg(sendingChunk);
-
-        headers["OC-Chunked"] = "1";
-
-        chunkStart = chunkSize() * quint64(sendingChunk);
-        currentChunkSize = chunkSize();
-        if (sendingChunk == _chunkCount - 1) { // last chunk
-            currentChunkSize = (fileSize % chunkSize());
-            if( currentChunkSize == 0 ) { // if the last chunk pretends to be 0, its actually the full chunk size.
-                currentChunkSize = chunkSize();
-            }
-            isFinalChunk = true;
-        }
-    } else {
-        // if there's only one chunk, it's the final one
-        isFinalChunk = true;
-    }
-
-    if (isFinalChunk && !_transmissionChecksumType.isEmpty()) {
-        headers[checkSumHeaderC] = makeChecksumHeader(
-                _transmissionChecksumType, _transmissionChecksum);
-    }
-
-    const QString fileName = _propagator->getFilePath(_item->_file);
-    if (! device->prepareAndOpen(fileName, chunkStart, currentChunkSize)) {
-        qDebug() << "ERR: Could not prepare upload device: " << device->errorString();
-
-        // If the file is currently locked, we want to retry the sync
-        // when it becomes available again.
-        if (FileSystem::isFileLocked(fileName)) {
-            emit _propagator->seenLockedFile(fileName);
-        }
-
-        // Soft error because this is likely caused by the user modifying his files while syncing
-        abortWithError( SyncFileItem::SoftError, device->errorString() );
-        delete device;
-        return;
-    }
-
-    // job takes ownership of device via a QScopedPointer. Job deletes itself when finishing
-    PUTFileJob* job = new PUTFileJob(_propagator->account(), _propagator->_remoteFolder + path, device, headers, _currentChunk);
-    _jobs.append(job);
-    connect(job, SIGNAL(finishedSignal()), this, SLOT(slotPutFinished()));
-    connect(job, SIGNAL(uploadProgress(qint64,qint64)), this, SLOT(slotUploadProgress(qint64,qint64)));
-    connect(job, SIGNAL(uploadProgress(qint64,qint64)), device, SLOT(slotJobUploadProgress(qint64,qint64)));
-    connect(job, SIGNAL(destroyed(QObject*)), this, SLOT(slotJobDestroyed(QObject*)));
-    job->start();
-    _propagator->_activeJobList.append(this);
-    _currentChunk++;
-
-    bool parallelChunkUpload = true;
-    QByteArray env = qgetenv("OWNCLOUD_PARALLEL_CHUNK");
-    if (!env.isEmpty()) {
-        parallelChunkUpload = env != "false" && env != "0";
-    } else {
-        int versionNum = _propagator->account()->serverVersionInt();
-        if (versionNum < 0x080003) {
-            // Disable parallel chunk upload severs older than 8.0.3 to avoid too many
-            // internal sever errors (#2743, #2938)
-            parallelChunkUpload = false;
-        }
-    }
-
-    if (_currentChunk + _startChunk >= _chunkCount - 1) {
-        // Don't do parallel upload of chunk if this might be the last chunk because the server cannot handle that
-        // https://github.com/owncloud/core/issues/11106
-        parallelChunkUpload = false;
-    }
-
-    if (parallelChunkUpload && (_propagator->_activeJobList.count() < _propagator->maximumActiveJob())
-            && _currentChunk < _chunkCount ) {
-        startNextChunk();
-    }
-    if (!parallelChunkUpload || _chunkCount - _currentChunk <= 0) {
-        emit ready();
-    }
-}
-
-void PropagateUploadFile::slotPutFinished()
-{
-    PUTFileJob *job = qobject_cast<PUTFileJob *>(sender());
-    Q_ASSERT(job);
-    slotJobDestroyed(job); // remove it from the _jobs list
-
-    qDebug() << Q_FUNC_INFO << job->reply()->request().url() << "FINISHED WITH STATUS"
-             << job->reply()->error()
-             << (job->reply()->error() == QNetworkReply::NoError ? QLatin1String("") : job->reply()->errorString())
-             << job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute)
-             << job->reply()->attribute(QNetworkRequest::HttpReasonPhraseAttribute);
-
-    _propagator->_activeJobList.removeOne(this);
-
-    if (_finished) {
-        // We have sent the finished signal already. We don't need to handle any remaining jobs
-        return;
-    }
-
-    QNetworkReply::NetworkError err = job->reply()->error();
-
-#if QT_VERSION < QT_VERSION_CHECK(5, 4, 2)
-    if (err == QNetworkReply::OperationCanceledError && job->reply()->property(owncloudShouldSoftCancelPropertyName).isValid()) {
-        // Abort the job and try again later.
-        // This works around a bug in QNAM wich might reuse a non-empty buffer for the next request.
-        qDebug() << "Forcing job abort on HTTP connection reset with Qt < 5.4.2.";
-        _propagator->_anotherSyncNeeded = true;
-        abortWithError(SyncFileItem::SoftError, tr("Forcing job abort on HTTP connection reset with Qt < 5.4.2."));
-        return;
-    }
-#endif
-
-    if (err != QNetworkReply::NoError) {
-        _item->_httpErrorCode = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
-        if(checkForProblemsWithShared(_item->_httpErrorCode,
-            tr("The file was edited locally but is part of a read only share. "
-               "It is restored and your edit is in the conflict file."))) {
-            return;
-        }
-        QByteArray replyContent = job->reply()->readAll();
-        qDebug() << replyContent; // display the XML error in the debug
-        QString errorString = errorMessage(job->errorString(), replyContent);
-
-        if (job->reply()->hasRawHeader("OC-ErrorString")) {
-            errorString = job->reply()->rawHeader("OC-ErrorString");
-        }
-
-        if (_item->_httpErrorCode == 412) {
-            // Precondition Failed:   Maybe the bad etag is in the database, we need to clear the
-            // parent folder etag so we won't read from DB next sync.
-            _propagator->_journal->avoidReadFromDbOnNextSync(_item->_file);
-            _propagator->_anotherSyncNeeded = true;
-        }
-
-        SyncFileItem::Status status = classifyError(err, _item->_httpErrorCode,
-                                                    &_propagator->_anotherSyncNeeded);
-        abortWithError(status, errorString);
-        return;
-    }
-
-    _item->_httpErrorCode = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
-    // The server needs some time to process the request and provide us with a poll URL
-    if (_item->_httpErrorCode == 202) {
-        _finished = true;
-        QString path =  QString::fromUtf8(job->reply()->rawHeader("OC-Finish-Poll"));
-        if (path.isEmpty()) {
-            done(SyncFileItem::NormalError, tr("Poll URL missing"));
-            return;
-        }
-        startPollJob(path);
-        return;
-    }
-
-    // Check the file again post upload.
-    // Two cases must be considered separately: If the upload is finished,
-    // the file is on the server and has a changed ETag. In that case,
-    // the etag has to be properly updated in the client journal, and because
-    // of that we can bail out here with an error. But we can reschedule a
-    // sync ASAP.
-    // But if the upload is ongoing, because not all chunks were uploaded
-    // yet, the upload can be stopped and an error can be displayed, because
-    // the server hasn't registered the new file yet.
-    QByteArray etag = getEtagFromReply(job->reply());
-    bool finished = etag.length() > 0;
-
-    // Check if the file still exists
-    const QString fullFilePath(_propagator->getFilePath(_item->_file));
-    if( !FileSystem::fileExists(fullFilePath) ) {
-        if (!finished) {
-            abortWithError(SyncFileItem::SoftError, tr("The local file was removed during sync."));
-            return;
-        } else {
-            _propagator->_anotherSyncNeeded = true;
-        }
-    }
-
-    // Check whether the file changed since discovery.
-    if (! FileSystem::verifyFileUnchanged(fullFilePath, _item->_size, _item->_modtime)) {
-        _propagator->_anotherSyncNeeded = true;
-        if( !finished ) {
-            abortWithError(SyncFileItem::SoftError, tr("Local file changed during sync."));
-            // FIXME:  the legacy code was retrying for a few seconds.
-            //         and also checking that after the last chunk, and removed the file in case of INSTRUCTION_NEW
-            return;
-        }
-    }
-
-    if (!finished) {
-        // Proceed to next chunk.
-        if (_currentChunk >= _chunkCount) {
-            if (!_jobs.empty()) {
-                // just wait for the other job to finish.
-                return;
-            }
-            _finished = true;
-            done(SyncFileItem::NormalError, tr("The server did not acknowledge the last chunk. (No e-tag was present)"));
-            return;
-        }
-
-        // Deletes an existing blacklist entry on successful chunk upload
-        if (_item->_hasBlacklistEntry) {
-            _propagator->_journal->wipeErrorBlacklistEntry(_item->_file);
-            _item->_hasBlacklistEntry = false;
-        }
-
-        SyncJournalDb::UploadInfo pi;
-        pi._valid = true;
-        auto currentChunk = job->_chunk;
-        foreach (auto *job, _jobs) {
-            // Take the minimum finished one
-            if (auto putJob = qobject_cast<PUTFileJob*>(job)) {
-                currentChunk = qMin(currentChunk, putJob->_chunk - 1);
-            }
-        }
-        pi._chunk = (currentChunk + _startChunk + 1) % _chunkCount ; // next chunk to start with
-        pi._transferid = _transferId;
-        pi._modtime =  Utility::qDateTimeFromTime_t(_item->_modtime);
-        _propagator->_journal->setUploadInfo(_item->_file, pi);
-        _propagator->_journal->commit("Upload info");
-        startNextChunk();
-        return;
-    }
-
-    // the following code only happens after all chunks were uploaded.
-    _finished = true;
-    // the file id should only be empty for new files up- or downloaded
-    QByteArray fid = job->reply()->rawHeader("OC-FileID");
-    if( !fid.isEmpty() ) {
-        if( !_item->_fileId.isEmpty() && _item->_fileId != fid ) {
-            qDebug() << "WARN: File ID changed!" << _item->_fileId << fid;
-        }
-        _item->_fileId = fid;
-    }
-
-    _item->_etag = etag;
-
-    _item->_responseTimeStamp = job->responseTimestamp();
-
-    if (job->reply()->rawHeader("X-OC-MTime") != "accepted") {
-        // X-OC-MTime is supported since owncloud 5.0.   But not when chunking.
-        // Normally Owncloud 6 always puts X-OC-MTime
-        qWarning() << "Server does not support X-OC-MTime" << job->reply()->rawHeader("X-OC-MTime");
-        // Well, the mtime was not set
-        done(SyncFileItem::SoftError, "Server does not support X-OC-MTime");
-    }
-
-    // performance logging
-    _item->_requestDuration = _stopWatch.stop();
-    qDebug() << "*==* duration UPLOAD" << _item->_size
-             << _stopWatch.durationOfLap(QLatin1String("ContentChecksum"))
-             << _stopWatch.durationOfLap(QLatin1String("TransmissionChecksum"))
-             << _item->_requestDuration;
-    // The job might stay alive for the whole sync, release this tiny bit of memory.
-    _stopWatch.reset();
-
-    finalize(*_item);
-}
-
-void PropagateUploadFile::finalize(const SyncFileItem &copy)
-{
-    // Normally, copy == _item,   but when it comes from the UpdateMTimeAndETagJob, we need to do
-    // some updates
-    _item->_etag = copy._etag;
-    _item->_fileId = copy._fileId;
-
-    _item->_requestDuration = _duration.elapsed();
-
-    _finished = true;
-
-    if (!_propagator->_journal->setFileRecord(SyncJournalFileRecord(*_item, _propagator->getFilePath(_item->_file)))) {
-        done(SyncFileItem::FatalError, tr("Error writing metadata to the database"));
-        return;
-    }
-    // Remove from the progress database:
-    _propagator->_journal->setUploadInfo(_item->_file, SyncJournalDb::UploadInfo());
-    _propagator->_journal->commit("upload file start");
-
-    done(SyncFileItem::Success);
-}
-
-void PropagateUploadFile::slotUploadProgress(qint64 sent, qint64 total)
-{
-    // Completion is signaled with sent=0, total=0; avoid accidentally
-    // resetting progress due to the sent being zero by ignoring it.
-    // finishedSignal() is bound to be emitted soon anyway.
-    // See https://bugreports.qt.io/browse/QTBUG-44782.
-    if (sent == 0 && total == 0) {
-        return;
-    }
-
-    int progressChunk = _currentChunk + _startChunk - 1;
-    if (progressChunk >= _chunkCount)
-        progressChunk = _currentChunk - 1;
-
-    // amount is the number of bytes already sent by all the other chunks that were sent
-    // not including this one.
-    // FIXME: this assumes all chunks have the same size, which is true only if the last chunk
-    // has not been finished (which should not happen because the last chunk is sent sequentially)
-    quint64 amount = progressChunk * chunkSize();
-
-    sender()->setProperty("byteWritten", sent);
-    if (_jobs.count() > 1) {
-        amount -= (_jobs.count() -1) * chunkSize();
-        foreach (QObject *j, _jobs) {
-            amount += j->property("byteWritten").toULongLong();
-        }
-    } else {
-        // sender() is the only current job, no need to look at the byteWritten properties
-        amount += sent;
-    }
-    emit progress(*_item, amount);
-}
-
-void PropagateUploadFile::startPollJob(const QString& path)
+void PropagateUploadFileCommon::startPollJob(const QString& path)
 {
     PollJob* job = new PollJob(_propagator->account(), path, _item,
                                _propagator->_journal, _propagator->_localDir, this);
@@ -855,7 +477,7 @@ void PropagateUploadFile::startPollJob(const QString& path)
     job->start();
 }
 
-void PropagateUploadFile::slotPollFinished()
+void PropagateUploadFileCommon::slotPollFinished()
 {
     PollJob *job = qobject_cast<PollJob *>(sender());
     Q_ASSERT(job);
@@ -868,15 +490,15 @@ void PropagateUploadFile::slotPollFinished()
         return;
     }
 
-    finalize(*job->_item);
+    finalize();
 }
 
-void PropagateUploadFile::slotJobDestroyed(QObject* job)
+void PropagateUploadFileCommon::slotJobDestroyed(QObject* job)
 {
     _jobs.erase(std::remove(_jobs.begin(), _jobs.end(), job) , _jobs.end());
 }
 
-void PropagateUploadFile::abort()
+void PropagateUploadFileCommon::abort()
 {
     foreach(auto *job, _jobs) {
         if (job->reply()) {
@@ -887,12 +509,58 @@ void PropagateUploadFile::abort()
 }
 
 // This function is used whenever there is an error occuring and jobs might be in progress
-void PropagateUploadFile::abortWithError(SyncFileItem::Status status, const QString &error)
+void PropagateUploadFileCommon::abortWithError(SyncFileItem::Status status, const QString &error)
 {
     _finished = true;
     abort();
     done(status, error);
 }
 
+QMap<QByteArray, QByteArray> PropagateUploadFileCommon::headers()
+{
+    QMap<QByteArray, QByteArray> headers;
+    headers["OC-Async"] = "1";
+    headers["Content-Type"] = "application/octet-stream";
+    headers["X-OC-Mtime"] = QByteArray::number(qint64(_item->_modtime));
+
+    if(_item->_file.contains(".sys.admin#recall#")) {
+        // This is a file recall triggered by the admin.  Note: the
+        // recall list file created by the admin and downloaded by the
+        // client (.sys.admin#recall#) also falls into this category
+        // (albeit users are not supposed to mess up with it)
+
+        // We use a special tag header so that the server may decide to store this file away in some admin stage area
+        // And not directly in the user's area (which would trigger redownloads etc).
+        headers["OC-Tag"] = ".sys.admin#recall#";
+    }
+
+    if (!_item->_etag.isEmpty() && _item->_etag != "empty_etag"
+        && _item->_instruction != CSYNC_INSTRUCTION_NEW  // On new files never send a If-Match
+        && _item->_instruction != CSYNC_INSTRUCTION_TYPE_CHANGE
+        && !_deleteExisting
+    ) {
+        // We add quotes because the owncloud server always adds quotes around the etag, and
+        //  csync_owncloud.c's owncloud_file_id always strips the quotes.
+        headers["If-Match"] = '"' + _item->_etag + '"';
+    }
+    return headers;
+}
+
+void PropagateUploadFileCommon::finalize()
+{
+    _item->_requestDuration = _duration.elapsed();
+    _finished = true;
+
+    if (!_propagator->_journal->setFileRecord(SyncJournalFileRecord(*_item, _propagator->getFilePath(_item->_file)))) {
+        done(SyncFileItem::FatalError, tr("Error writing metadata to the database"));
+        return;
+    }
+    // Remove from the progress database:
+    _propagator->_journal->setUploadInfo(_item->_file, SyncJournalDb::UploadInfo());
+    _propagator->_journal->commit("upload file start");
+
+    done(SyncFileItem::Success);
+}
+
 
 }
diff --git a/src/libsync/propagateupload.h b/src/libsync/propagateupload.h
index f3375a11c..bac3e112b 100644
--- a/src/libsync/propagateupload.h
+++ b/src/libsync/propagateupload.h
@@ -89,12 +89,17 @@ private:
     QScopedPointer<QIODevice> _device;
     QMap<QByteArray, QByteArray> _headers;
     QString _errorString;
+    QUrl _url;
 
 public:
     // Takes ownership of the device
     explicit PUTFileJob(AccountPtr account, const QString& path, QIODevice *device,
                         const QMap<QByteArray, QByteArray> &headers, int chunk, QObject* parent = 0)
         : AbstractNetworkJob(account, path, parent), _device(device), _headers(headers), _chunk(chunk) {}
+    explicit PUTFileJob(AccountPtr account, const QUrl& url, QIODevice *device,
+                        const QMap<QByteArray, QByteArray> &headers, int chunk, QObject* parent = 0)
+        : AbstractNetworkJob(account, QString(), parent), _device(device), _headers(headers)
+        , _url(url), _chunk(chunk) {}
     ~PUTFileJob();
 
     int _chunk;
@@ -155,10 +160,90 @@ signals:
 };
 
 /**
- * @brief The PropagateUploadFile class
+ * @brief The PropagateUploadFileCommon class is the code common between all chunking algorithms
  * @ingroup libsync
+ *
+ * State Machine:
+ *
+ *   +---> start()  --> (delete job) -------+
+ *   |                                      |
+ *   +--> slotComputeContentChecksum()  <---+
+ *                   |
+ *                   v
+ *    slotComputeTransmissionChecksum()
+ *         |
+ *         v
+ *    slotStartUpload()  -> doStartUpload()
+ *                                  .
+ *                                  .
+ *                                  v
+ *        finalize() or abortWithError()  or startPollJob()
  */
-class PropagateUploadFile : public PropagateItemJob {
+class PropagateUploadFileCommon : public PropagateItemJob {
+    Q_OBJECT
+
+protected:
+    QElapsedTimer _duration;
+    QVector<AbstractNetworkJob*> _jobs; /// network jobs that are currently in transit
+    bool _finished; /// Tells that all the jobs have been finished
+    bool _deleteExisting;
+
+    // measure the performance of checksum calc and upload
+    Utility::StopWatch _stopWatch;
+
+    QByteArray _transmissionChecksum;
+    QByteArray _transmissionChecksumType;
+
+
+public:
+    PropagateUploadFileCommon(OwncloudPropagator* propagator,const SyncFileItemPtr& item)
+        : PropagateItemJob(propagator, item), _finished(false), _deleteExisting(false) {}
+
+    /**
+     * Whether an existing entity with the same name may be deleted before
+     * the upload.
+     *
+     * Default: false.
+     */
+    void setDeleteExisting(bool enabled);
+
+    void start() Q_DECL_OVERRIDE;
+
+    bool isLikelyFinishedQuickly() Q_DECL_OVERRIDE { return _item->_size < 100*1024; }
+
+private slots:
+    void slotComputeContentChecksum();
+    // Content checksum computed, compute the transmission checksum
+    void slotComputeTransmissionChecksum(const QByteArray& contentChecksumType, const QByteArray& contentChecksum);
+    // transmission checksum computed, prepare the upload
+    void slotStartUpload(const QByteArray& transmissionChecksumType, const QByteArray& transmissionChecksum);
+public:
+    virtual void doStartUpload() = 0;
+
+    void startPollJob(const QString& path);
+    void finalize();
+    void abortWithError(SyncFileItem::Status status, const QString &error);
+
+public slots:
+    void abort() Q_DECL_OVERRIDE;
+    void slotJobDestroyed(QObject *job);
+
+private slots:
+    void slotPollFinished();
+
+protected:
+    // Bases headers that need to be sent with every chunk
+    QMap<QByteArray, QByteArray> headers();
+
+};
+
+/**
+ * @ingroup libsync
+ *
+ * Propagation job, impementing the old chunking agorithm
+ *
+ */
+class PropagateUploadFileV1 : public PropagateUploadFileCommon {
     Q_OBJECT
 
 private:
@@ -176,51 +261,66 @@ private:
     int _currentChunk;
     int _chunkCount; /// Total number of chunks for this file
     int _transferId; /// transfer id (part of the url)
-    QElapsedTimer _duration;
-    QVector<AbstractNetworkJob*> _jobs; /// network jobs that are currently in transit
-    bool _finished; // Tells that all the jobs have been finished
 
-    // measure the performance of checksum calc and upload
-    Utility::StopWatch _stopWatch;
+    quint64 chunkSize() const { return _propagator->chunkSize(); }
 
-    QByteArray _transmissionChecksum;
-    QByteArray _transmissionChecksumType;
 
-    bool _deleteExisting;
+public:
+    PropagateUploadFileV1(OwncloudPropagator* propagator,const SyncFileItemPtr& item) :
+        PropagateUploadFileCommon(propagator,item) {}
 
-    quint64 chunkSize() const { return _propagator->chunkSize(); }
+    void doStartUpload() Q_DECL_OVERRIDE;
 
-public:
-    PropagateUploadFile(OwncloudPropagator* propagator,const SyncFileItemPtr& item)
-        : PropagateItemJob(propagator, item), _startChunk(0), _currentChunk(0), _chunkCount(0), _transferId(0), _finished(false), _deleteExisting(false) {}
-    void start() Q_DECL_OVERRIDE;
+private slots:
+    void startNextChunk();
+    void slotPutFinished();
+    void slotUploadProgress(qint64,qint64);
+};
 
-    bool isLikelyFinishedQuickly() Q_DECL_OVERRIDE { return _item->_size < 100*1024; }
+/**
+ * @ingroup libsync
+ *
+ * Propagation job, impementing the new chunking agorithm
+ *
+ */
+class PropagateUploadFileNG : public PropagateUploadFileCommon {
+    Q_OBJECT
+private:
+    quint64 _sent; /// amount of data (bytes) that was already sent
+    uint _transferId; /// transfer id (part of the url)
+    int _currentChunk; /// Id of the next chunk that will be sent
+    bool _removeJobError; /// If not null, there was an error removing the job
 
+    // Map chunk number with its size  from the PROPFIND on resume.
+    // (Only used from slotPropfindIterate/slotPropfindFinished because the LsColJob use signals to report data.)
+    QMap<int, quint64> _serverChunks;
+
+    quint64 chunkSize() const { return _propagator->chunkSize(); }
     /**
-     * Whether an existing entity with the same name may be deleted before
-     * the upload.
-     *
-     * Default: false.
+     * Return the URL of a chunk.
+     * If chunk == -1, returns the URL of the parent folder containing the chunks
      */
-    void setDeleteExisting(bool enabled);
+    QUrl chunkUrl(int chunk = -1);
+
+public:
+    PropagateUploadFileNG(OwncloudPropagator* propagator,const SyncFileItemPtr& item) :
+        PropagateUploadFileCommon(propagator,item) {}
 
+    void doStartUpload() Q_DECL_OVERRIDE;
+private:
+    void startNewUpload();
+    void startNextChunk();
 private slots:
+    void slotPropfindFinished();
+    void slotPropfindFinishedWithError();
+    void slotPropfindIterate(const QString &name, const QMap<QString,QString> &properties);
+    void slotDeleteJobFinished();
+    void slotMkColFinished(QNetworkReply::NetworkError);
     void slotPutFinished();
-    void slotPollFinished();
+    void slotMoveJobFinished();
     void slotUploadProgress(qint64,qint64);
-    void abort() Q_DECL_OVERRIDE;
-    void startNextChunk();
-    void finalize(const SyncFileItem&);
-    void slotJobDestroyed(QObject *job);
-    void slotStartUpload(const QByteArray& transmissionChecksumType, const QByteArray& transmissionChecksum);
-    void slotComputeTransmissionChecksum(const QByteArray& contentChecksumType, const QByteArray& contentChecksum);
-    void slotComputeContentChecksum();
-
-private:
-    void startPollJob(const QString& path);
-    void abortWithError(SyncFileItem::Status status, const QString &error);
 };
 
+
 }
 
diff --git a/src/libsync/propagateuploadng.cpp b/src/libsync/propagateuploadng.cpp
new file mode 100644
index 000000000..c96164c4b
--- /dev/null
+++ b/src/libsync/propagateuploadng.cpp
@@ -0,0 +1,488 @@
+/*
+ * Copyright (C) by Olivier Goffart <ogoffart@owncloud.com>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.
+ */
+
+#include "config.h"
+#include "propagateupload.h"
+#include "owncloudpropagator_p.h"
+#include "networkjobs.h"
+#include "account.h"
+#include "syncjournaldb.h"
+#include "syncjournalfilerecord.h"
+#include "utility.h"
+#include "filesystem.h"
+#include "propagatorjobs.h"
+#include "syncengine.h"
+#include "propagateremotemove.h"
+#include "propagateremotedelete.h"
+
+
+#include <QNetworkAccessManager>
+#include <QFileInfo>
+#include <QDir>
+#include <cmath>
+#include <cstring>
+
+namespace OCC {
+
+QUrl PropagateUploadFileNG::chunkUrl(int chunk)
+{
+    QString path = QLatin1String("remote.php/dav/uploads/")
+        + _propagator->account()->user()
+        + QLatin1Char('/') + QString::number(_transferId);
+    if (chunk >= 0) {
+        path += QLatin1Char('/') + QString::number(chunk);
+    }
+    return Utility::concatUrlPath(_propagator->account()->url(), path);
+}
+
+/*
+  State machine:
+
+     *----> doStartUpload()
+            Check the db: is there an entry?
+              /               \
+             no                yes
+            /                   \
+           /                  PROPFIND
+       startNewUpload() <-+        +----------------------------\
+          |               |        |                             \
+         MKCOL            + slotPropfindFinishedWithError()     slotPropfindFinished()
+          |                                                       Is there stale files to remove?
+      slotMkColFinished()                                         |                      |
+          |                                                       no                    yes
+          |                                                       |                      |
+          |                                                       |                  DeleteJob
+          |                                                       |                      |
+    +-----+<------------------------------------------------------+<---  slotDeleteJobFinished()
+    |
+    +---->  startNextChunk()  ---finished?  --+
+                  ^               |          |
+                  +---------------+          |
+                                             |
+    +----------------------------------------+
+    |
+    +-> MOVE ------> moveJobFinished() ---> finalize()
+
+
+ */
+
+void PropagateUploadFileNG::doStartUpload()
+{
+    _duration.start();
+    _propagator->_activeJobList.append(this);
+
+    const SyncJournalDb::UploadInfo progressInfo = _propagator->_journal->getUploadInfo(_item->_file);
+    if (progressInfo._valid && Utility::qDateTimeToTime_t(progressInfo._modtime) == _item->_modtime ) {
+        _transferId = progressInfo._transferid;
+        auto url = chunkUrl();
+        auto job = new LsColJob(_propagator->account(), url, this);
+        _jobs.append(job);
+        job->setProperties(QList<QByteArray>() << "resourcetype" << "getcontentlength");
+        connect(job, SIGNAL(finishedWithoutError()), this, SLOT(slotPropfindFinished()));
+        connect(job, SIGNAL(finishedWithError(QNetworkReply*)),
+                this, SLOT(slotPropfindFinishedWithError()));
+        connect(job, SIGNAL(destroyed(QObject*)), this, SLOT(slotJobDestroyed(QObject*)));
+        connect(job, SIGNAL(directoryListingIterated(QString,QMap<QString,QString>)),
+                this, SLOT(slotPropfindIterate(QString,QMap<QString,QString>)));
+        job->start();
+        return;
+    }
+
+    startNewUpload();
+}
+
+void PropagateUploadFileNG::slotPropfindIterate(const QString &name, const QMap<QString,QString> &properties)
+{
+    if (name == chunkUrl().path()) {
+        return; // skip the info about the path itself
+    }
+    bool ok = false;
+    auto chunkId = name.mid(name.lastIndexOf('/')+1).toUInt(&ok);
+    if (ok) {
+        _serverChunks[chunkId] = properties["getcontentlength"].toULongLong();
+    }
+}
+
+void PropagateUploadFileNG::slotPropfindFinished()
+{
+    auto job = qobject_cast<LsColJob *>(sender());
+    slotJobDestroyed(job); // remove it from the _jobs list
+    _propagator->_activeJobList.removeOne(this);
+
+    _currentChunk = 0;
+    _sent = 0;
+    while (_serverChunks.contains(_currentChunk)) {
+        _sent += _serverChunks[_currentChunk];
+        _serverChunks.remove(_currentChunk);
+        ++_currentChunk;
+    }
+
+    if (_sent > _item->_size) {
+        // Normally this can't happen because the size is xor'ed with the transfer id, and it is
+        // therefore impossible that there is more data on the server than on the file.
+        qWarning() << "Inconsistency while resuming " << _item->_file
+            << ": the size on the server (" << _sent << ") is bigger than the size of the file ("
+            << _item->_size << ")";
+        startNewUpload();
+        return;
+    }
+
+    qDebug() << "Resuming "<< _item->_file << " from chunk " << _currentChunk << "; sent ="<< _sent;
+
+    if (!_serverChunks.isEmpty()) {
+        qDebug() << "To Delete" << _serverChunks;
+        _propagator->_activeJobList.append(this);
+        _removeJobError = false;
+
+        // Make sure that if there is a "hole" and then a few more chunks, on the server
+        // we should remove the later chunks. Otherwise when we do dynamic chunk sizing, we may end up
+        // with corruptions if there are too many chunks, or if we abort and there are still stale chunks.
+        for (auto it = _serverChunks.begin(); it != _serverChunks.end(); ++it) {
+            auto job = new DeleteJob(_propagator->account(), Utility::concatUrlPath(chunkUrl(), QString::number(it.key())), this);
+            QObject::connect(job, SIGNAL(finishedSignal()), this, SLOT(slotDeleteJobFinished()));
+            _jobs.append(job);
+            job->start();
+        }
+        return;
+    }
+
+    startNextChunk();
+}
+
+void PropagateUploadFileNG::slotPropfindFinishedWithError()
+{
+    auto job = qobject_cast<LsColJob *>(sender());
+    slotJobDestroyed(job); // remove it from the _jobs list
+    QNetworkReply::NetworkError err = job->reply()->error();
+    auto httpErrorCode = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+    auto status = classifyError(err, httpErrorCode, &_propagator->_anotherSyncNeeded);
+    if (status == SyncFileItem::FatalError) {
+        _propagator->_activeJobList.removeOne(this);
+        QString errorString = errorMessage(job->reply()->errorString(), job->reply()->readAll());
+        abortWithError(status, errorString);
+        return;
+    }
+    startNewUpload();
+}
+
+void PropagateUploadFileNG::slotDeleteJobFinished()
+{
+    auto job = qobject_cast<DeleteJob *>(sender());
+    Q_ASSERT(job);
+    _jobs.remove(_jobs.indexOf(job));
+
+    QNetworkReply::NetworkError err = job->reply()->error();
+    if (err != QNetworkReply::NoError && err != QNetworkReply::ContentNotFoundError) {
+        const int httpStatus = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+        SyncFileItem::Status status = classifyError(err, httpStatus);
+        if (status == SyncFileItem::FatalError) {
+            abortWithError(status, job->errorString());
+            return;
+        } else {
+            qWarning() << "DeleteJob errored out" << job->errorString() << job->reply()->url();
+            _removeJobError = true;
+            // Let the other jobs finish
+        }
+    }
+
+    if (_jobs.isEmpty()) {
+        _propagator->_activeJobList.removeOne(this);
+        if (_removeJobError) {
+            // There was an error removing some files, just start over
+            startNewUpload();
+        } else {
+            startNextChunk();
+        }
+    }
+}
+
+
+
+void PropagateUploadFileNG::startNewUpload()
+{
+    Q_ASSERT(_propagator->_activeJobList.count(this) == 1);
+    _transferId = qrand() ^ _item->_modtime ^ (_item->_size << 16) ^ qHash(_item->_file);
+    _sent = 0;
+    _currentChunk = 0;
+
+    emit progress(*_item, 0);
+
+    SyncJournalDb::UploadInfo pi;
+    pi._valid = true;
+    pi._transferid = _transferId;
+    pi._modtime =  Utility::qDateTimeFromTime_t(_item->_modtime);
+    _propagator->_journal->setUploadInfo(_item->_file, pi);
+    _propagator->_journal->commit("Upload info");
+    QMap<QByteArray, QByteArray> headers;
+    headers["OC-Total-Length"] = QByteArray::number(_item->_size);
+    auto job = new MkColJob(_propagator->account(), chunkUrl(), headers, this);
+
+    connect(job, SIGNAL(finished(QNetworkReply::NetworkError)),
+            this, SLOT(slotMkColFinished(QNetworkReply::NetworkError)));
+    connect(job, SIGNAL(destroyed(QObject*)), this, SLOT(slotJobDestroyed(QObject*)));
+    job->start();
+}
+
+void PropagateUploadFileNG::slotMkColFinished(QNetworkReply::NetworkError)
+{
+    _propagator->_activeJobList.removeOne(this);
+    auto job = qobject_cast<MkColJob *>(sender());
+    slotJobDestroyed(job); // remove it from the _jobs list
+    QNetworkReply::NetworkError err = job->reply()->error();
+    _item->_httpErrorCode = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+
+    if (err != QNetworkReply::NoError || _item->_httpErrorCode != 201) {
+        SyncFileItem::Status status = classifyError(err, _item->_httpErrorCode,
+                                                    &_propagator->_anotherSyncNeeded);
+        QString errorString = errorMessage(job->reply()->errorString(), job->reply()->readAll());
+        if (job->reply()->hasRawHeader("OC-ErrorString")) {
+            errorString = job->reply()->rawHeader("OC-ErrorString");
+        }
+        abortWithError(status, errorString);
+        return;
+    }
+    startNextChunk();
+}
+
+void PropagateUploadFileNG::startNextChunk()
+{
+    if (_propagator->_abortRequested.fetchAndAddRelaxed(0))
+        return;
+
+    quint64 fileSize = _item->_size;
+    Q_ASSERT(fileSize >= _sent);
+    quint64 currentChunkSize = qMin(chunkSize(), fileSize - _sent);
+
+    if (currentChunkSize == 0) {
+        Q_ASSERT(_jobs.isEmpty()); // There should be no running job anymore
+        _finished = true;
+        // Finish with a MOVE
+        QString destination = _propagator->account()->url().path()
+            + QLatin1String("/remote.php/dav/files/") + _propagator->account()->user()
+            + _propagator->_remoteFolder + _item->_file;
+        auto headers = PropagateUploadFileCommon::headers();
+
+        // "If-Match applies to the source, but we are interested in comparing the etag of the destination
+        auto ifMatch = headers.take("If-Match");
+        if (!ifMatch.isEmpty()) {
+            headers["If"] =  "<" + destination.toUtf8() + "> ([" + ifMatch + "])";
+        }
+        if (!_transmissionChecksumType.isEmpty()) {
+            headers[checkSumHeaderC] = makeChecksumHeader(
+                _transmissionChecksumType, _transmissionChecksum);
+        }
+
+        auto job = new MoveJob(_propagator->account(), Utility::concatUrlPath(chunkUrl(), "/.file"),
+                               destination, headers, this);
+        _jobs.append(job);
+        connect(job, SIGNAL(finishedSignal()), this, SLOT(slotMoveJobFinished()));
+        connect(job, SIGNAL(destroyed(QObject*)), this, SLOT(slotJobDestroyed(QObject*)));
+        _propagator->_activeJobList.append(this);
+        job->start();
+        return;
+    }
+
+    auto device = new UploadDevice(&_propagator->_bandwidthManager);
+    const QString fileName = _propagator->getFilePath(_item->_file);
+
+    if (! device->prepareAndOpen(fileName, _sent, currentChunkSize)) {
+        qDebug() << "ERR: Could not prepare upload device: " << device->errorString();
+
+        // If the file is currently locked, we want to retry the sync
+        // when it becomes available again.
+        if (FileSystem::isFileLocked(fileName)) {
+            emit _propagator->seenLockedFile(fileName);
+        }
+        // Soft error because this is likely caused by the user modifying his files while syncing
+        abortWithError( SyncFileItem::SoftError, device->errorString() );
+        return;
+    }
+
+    QMap<QByteArray, QByteArray> headers;
+    headers["OC-Chunk-Offset"] = QByteArray::number(_sent);
+
+    _sent += currentChunkSize;
+    QUrl url = chunkUrl(_currentChunk);
+
+    // job takes ownership of device via a QScopedPointer. Job deletes itself when finishing
+    PUTFileJob* job = new PUTFileJob(_propagator->account(), url, device, headers, _currentChunk);
+    _jobs.append(job);
+    connect(job, SIGNAL(finishedSignal()), this, SLOT(slotPutFinished()));
+    connect(job, SIGNAL(uploadProgress(qint64,qint64)),
+            this, SLOT(slotUploadProgress(qint64,qint64)));
+    connect(job, SIGNAL(uploadProgress(qint64,qint64)),
+            device, SLOT(slotJobUploadProgress(qint64,qint64)));
+    connect(job, SIGNAL(destroyed(QObject*)), this, SLOT(slotJobDestroyed(QObject*)));
+    job->start();
+    _propagator->_activeJobList.append(this);
+    _currentChunk++;
+
+    // FIXME! parallel chunk?
+
+}
+
+void PropagateUploadFileNG::slotPutFinished()
+{
+    PUTFileJob *job = qobject_cast<PUTFileJob *>(sender());
+    Q_ASSERT(job);
+    slotJobDestroyed(job); // remove it from the _jobs list
+
+    qDebug() << job->reply()->request().url() << "FINISHED WITH STATUS"
+             << job->reply()->error()
+             << (job->reply()->error() == QNetworkReply::NoError ? QLatin1String("") : job->reply()->errorString())
+             << job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute)
+             << job->reply()->attribute(QNetworkRequest::HttpReasonPhraseAttribute);
+
+    _propagator->_activeJobList.removeOne(this);
+
+    if (_finished) {
+        // We have sent the finished signal already. We don't need to handle any remaining jobs
+        return;
+    }
+
+    QNetworkReply::NetworkError err = job->reply()->error();
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 4, 2)
+    if (err == QNetworkReply::OperationCanceledError && job->reply()->property("owncloud-should-soft-cancel").isValid()) {
+        // Abort the job and try again later.
+        // This works around a bug in QNAM wich might reuse a non-empty buffer for the next request.
+        qDebug() << "Forcing job abort on HTTP connection reset with Qt < 5.4.2.";
+        _propagator->_anotherSyncNeeded = true;
+        abortWithError(SyncFileItem::SoftError, tr("Forcing job abort on HTTP connection reset with Qt < 5.4.2."));
+        return;
+    }
+#endif
+
+    if (err != QNetworkReply::NoError) {
+        _item->_httpErrorCode = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+        QByteArray replyContent = job->reply()->readAll();
+        qDebug() << replyContent; // display the XML error in the debug
+        QString errorString = errorMessage(job->errorString(), replyContent);
+
+        if (job->reply()->hasRawHeader("OC-ErrorString")) {
+            errorString = job->reply()->rawHeader("OC-ErrorString");
+        }
+
+        // FIXME!  can this happen for the chunks?
+        if (_item->_httpErrorCode == 412) {
+            // Precondition Failed:   Maybe the bad etag is in the database, we need to clear the
+            // parent folder etag so we won't read from DB next sync.
+            _propagator->_journal->avoidReadFromDbOnNextSync(_item->_file);
+            _propagator->_anotherSyncNeeded = true;
+        }
+
+        SyncFileItem::Status status = classifyError(err, _item->_httpErrorCode,
+                                                    &_propagator->_anotherSyncNeeded);
+        abortWithError(status, errorString);
+        return;
+    }
+
+    Q_ASSERT(_sent <= _item->_size);
+    bool finished = _sent == _item->_size;
+
+    // Check if the file still exists
+    const QString fullFilePath(_propagator->getFilePath(_item->_file));
+    if( !FileSystem::fileExists(fullFilePath) ) {
+        if (!finished) {
+            abortWithError(SyncFileItem::SoftError, tr("The local file was removed during sync."));
+            return;
+        } else {
+            _propagator->_anotherSyncNeeded = true;
+        }
+    }
+
+    // Check whether the file changed since discovery.
+    if (! FileSystem::verifyFileUnchanged(fullFilePath, _item->_size, _item->_modtime)) {
+        _propagator->_anotherSyncNeeded = true;
+        if( !finished ) {
+            abortWithError(SyncFileItem::SoftError, tr("Local file changed during sync."));
+            return;
+        }
+    }
+
+    if (!finished) {
+        // Deletes an existing blacklist entry on successful chunk upload
+        if (_item->_hasBlacklistEntry) {
+            _propagator->_journal->wipeErrorBlacklistEntry(_item->_file);
+            _item->_hasBlacklistEntry = false;
+        }
+    }
+    startNextChunk();
+}
+
+void PropagateUploadFileNG::slotMoveJobFinished()
+{
+    _propagator->_activeJobList.removeOne(this);
+    auto job = qobject_cast<MoveJob *>(sender());
+    slotJobDestroyed(job); // remove it from the _jobs list
+    QNetworkReply::NetworkError err = job->reply()->error();
+    _item->_httpErrorCode = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+
+    if (err != QNetworkReply::NoError) {
+        SyncFileItem::Status status = classifyError(err, _item->_httpErrorCode,
+                                                    &_propagator->_anotherSyncNeeded);
+        QString errorString = errorMessage(job->errorString(), job->reply()->readAll());
+        abortWithError(status, errorString);
+        return;
+    }
+    if (_item->_httpErrorCode != 201 && _item->_httpErrorCode != 204) {
+        abortWithError(SyncFileItem::NormalError, tr("Unexpected return code from server (%1)").arg(_item->_httpErrorCode));
+        return;
+    }
+
+    QByteArray fid = job->reply()->rawHeader("OC-FileID");
+    if(fid.isEmpty()) {
+        qWarning() << "Server did not return a OC-FileID" << _item->_file;
+        abortWithError(SyncFileItem::NormalError, tr("Missing File ID from server"));
+        return;
+    } else {
+        // the old file id should only be empty for new files uploaded
+        if( !_item->_fileId.isEmpty() && _item->_fileId != fid ) {
+            qDebug() << "WARN: File ID changed!" << _item->_fileId << fid;
+        }
+        _item->_fileId = fid;
+    }
+
+    _item->_etag = getEtagFromReply(job->reply());;
+    if (_item->_etag.isEmpty()) {
+        qWarning() << "Server did not return an ETAG" << _item->_file;
+        abortWithError(SyncFileItem::NormalError, tr("Missing ETag from server"));
+        return;
+    }
+    _item->_responseTimeStamp = job->responseTimestamp();
+
+    // performance logging
+    _item->_requestDuration = _stopWatch.stop();
+    qDebug() << "*==* duration UPLOAD" << _item->_size
+             << _stopWatch.durationOfLap(QLatin1String("ContentChecksum"))
+             << _stopWatch.durationOfLap(QLatin1String("TransmissionChecksum"))
+             << _item->_requestDuration;
+    // The job might stay alive for the whole sync, release this tiny bit of memory.
+    _stopWatch.reset();
+    finalize();
+}
+
+void PropagateUploadFileNG::slotUploadProgress(qint64 sent, qint64 total)
+{
+    // Completion is signaled with sent=0, total=0; avoid accidentally
+    // resetting progress due to the sent being zero by ignoring it.
+    // finishedSignal() is bound to be emitted soon anyway.
+    // See https://bugreports.qt.io/browse/QTBUG-44782.
+    if (sent == 0 && total == 0) {
+        return;
+    }
+    emit progress(*_item, _sent + sent - total);
+}
+
+}
diff --git a/src/libsync/propagateuploadv1.cpp b/src/libsync/propagateuploadv1.cpp
new file mode 100644
index 000000000..dd075fa77
--- /dev/null
+++ b/src/libsync/propagateuploadv1.cpp
@@ -0,0 +1,375 @@
+/*
+ * Copyright (C) by Olivier Goffart <ogoffart@owncloud.com>
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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.
+ */
+
+#include "config.h"
+#include "propagateupload.h"
+#include "owncloudpropagator_p.h"
+#include "networkjobs.h"
+#include "account.h"
+#include "syncjournaldb.h"
+#include "syncjournalfilerecord.h"
+#include "utility.h"
+#include "filesystem.h"
+#include "propagatorjobs.h"
+#include "checksums.h"
+#include "syncengine.h"
+#include "propagateremotedelete.h"
+
+#include <json.h>
+#include <QNetworkAccessManager>
+#include <QFileInfo>
+#include <QDir>
+#include <cmath>
+#include <cstring>
+
+namespace OCC {
+void PropagateUploadFileV1::doStartUpload()
+{
+    _chunkCount = std::ceil(_item->_size / double(chunkSize()));
+    _startChunk = 0;
+    _transferId = qrand() ^ _item->_modtime ^ (_item->_size << 16);
+
+    const SyncJournalDb::UploadInfo progressInfo = _propagator->_journal->getUploadInfo(_item->_file);
+
+    if (progressInfo._valid && Utility::qDateTimeToTime_t(progressInfo._modtime) == _item->_modtime ) {
+        _startChunk = progressInfo._chunk;
+        _transferId = progressInfo._transferid;
+        qDebug() << Q_FUNC_INFO << _item->_file << ": Resuming from chunk " << _startChunk;
+    }
+
+    _currentChunk = 0;
+    _duration.start();
+
+    emit progress(*_item, 0);
+    startNextChunk();
+}
+
+void PropagateUploadFileV1::startNextChunk()
+{
+    if (_propagator->_abortRequested.fetchAndAddRelaxed(0))
+        return;
+
+    if (! _jobs.isEmpty() &&  _currentChunk + _startChunk >= _chunkCount - 1) {
+        // Don't do parallel upload of chunk if this might be the last chunk because the server cannot handle that
+        // https://github.com/owncloud/core/issues/11106
+        // We return now and when the _jobs are finished we will proceed with the last chunk
+        // NOTE: Some other parts of the code such as slotUploadProgress also assume that the last chunk
+        // is sent last.
+        return;
+    }
+    quint64 fileSize = _item->_size;
+    auto headers = PropagateUploadFileCommon::headers();
+    headers["OC-Total-Length"] = QByteArray::number(fileSize);
+    headers["OC-Chunk-Size"]= QByteArray::number(quint64(chunkSize()));
+
+    QString path = _item->_file;
+
+    UploadDevice *device = new UploadDevice(&_propagator->_bandwidthManager);
+    qint64 chunkStart = 0;
+    qint64 currentChunkSize = fileSize;
+    bool isFinalChunk = false;
+    if (_chunkCount > 1) {
+        int sendingChunk = (_currentChunk + _startChunk) % _chunkCount;
+        // XOR with chunk size to make sure everything goes well if chunk size changes between runs
+        uint transid = _transferId ^ chunkSize();
+        qDebug() << "Upload chunk" << sendingChunk << "of" << _chunkCount << "transferid(remote)=" << transid;
+        path +=  QString("-chunking-%1-%2-%3").arg(transid).arg(_chunkCount).arg(sendingChunk);
+
+        headers["OC-Chunked"] = "1";
+
+        chunkStart = chunkSize() * quint64(sendingChunk);
+        currentChunkSize = chunkSize();
+        if (sendingChunk == _chunkCount - 1) { // last chunk
+            currentChunkSize = (fileSize % chunkSize());
+            if( currentChunkSize == 0 ) { // if the last chunk pretends to be 0, its actually the full chunk size.
+                currentChunkSize = chunkSize();
+            }
+            isFinalChunk = true;
+        }
+    } else {
+        // if there's only one chunk, it's the final one
+        isFinalChunk = true;
+    }
+
+    if (isFinalChunk && !_transmissionChecksumType.isEmpty()) {
+        headers[checkSumHeaderC] = makeChecksumHeader(
+                _transmissionChecksumType, _transmissionChecksum);
+    }
+
+    const QString fileName = _propagator->getFilePath(_item->_file);
+    if (! device->prepareAndOpen(fileName, chunkStart, currentChunkSize)) {
+        qDebug() << "ERR: Could not prepare upload device: " << device->errorString();
+
+        // If the file is currently locked, we want to retry the sync
+        // when it becomes available again.
+        if (FileSystem::isFileLocked(fileName)) {
+            emit _propagator->seenLockedFile(fileName);
+        }
+        // Soft error because this is likely caused by the user modifying his files while syncing
+        abortWithError( SyncFileItem::SoftError, device->errorString() );
+        delete device;
+        return;
+    }
+
+    // job takes ownership of device via a QScopedPointer. Job deletes itself when finishing
+    PUTFileJob* job = new PUTFileJob(_propagator->account(), _propagator->_remoteFolder + path, device, headers, _currentChunk);
+    _jobs.append(job);
+    connect(job, SIGNAL(finishedSignal()), this, SLOT(slotPutFinished()));
+    connect(job, SIGNAL(uploadProgress(qint64,qint64)), this, SLOT(slotUploadProgress(qint64,qint64)));
+    connect(job, SIGNAL(uploadProgress(qint64,qint64)), device, SLOT(slotJobUploadProgress(qint64,qint64)));
+    connect(job, SIGNAL(destroyed(QObject*)), this, SLOT(slotJobDestroyed(QObject*)));
+    job->start();
+    _propagator->_activeJobList.append(this);
+    _currentChunk++;
+
+    bool parallelChunkUpload = true;
+    QByteArray env = qgetenv("OWNCLOUD_PARALLEL_CHUNK");
+    if (!env.isEmpty()) {
+        parallelChunkUpload = env != "false" && env != "0";
+    } else {
+        int versionNum = _propagator->account()->serverVersionInt();
+        if (versionNum < 0x080003) {
+            // Disable parallel chunk upload severs older than 8.0.3 to avoid too many
+            // internal sever errors (#2743, #2938)
+            parallelChunkUpload = false;
+        }
+    }
+
+    if (_currentChunk + _startChunk >= _chunkCount - 1) {
+        // Don't do parallel upload of chunk if this might be the last chunk because the server cannot handle that
+        // https://github.com/owncloud/core/issues/11106
+        parallelChunkUpload = false;
+    }
+
+    if (parallelChunkUpload && (_propagator->_activeJobList.count() < _propagator->maximumActiveJob())
+            && _currentChunk < _chunkCount ) {
+        startNextChunk();
+    }
+    if (!parallelChunkUpload || _chunkCount - _currentChunk <= 0) {
+        emit ready();
+    }
+}
+
+void PropagateUploadFileV1::slotPutFinished()
+{
+    PUTFileJob *job = qobject_cast<PUTFileJob *>(sender());
+    Q_ASSERT(job);
+    slotJobDestroyed(job); // remove it from the _jobs list
+
+    qDebug() << Q_FUNC_INFO << job->reply()->request().url() << "FINISHED WITH STATUS"
+             << job->reply()->error()
+             << (job->reply()->error() == QNetworkReply::NoError ? QLatin1String("") : job->reply()->errorString())
+             << job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute)
+             << job->reply()->attribute(QNetworkRequest::HttpReasonPhraseAttribute);
+
+    _propagator->_activeJobList.removeOne(this);
+
+    if (_finished) {
+        // We have sent the finished signal already. We don't need to handle any remaining jobs
+        return;
+    }
+
+    QNetworkReply::NetworkError err = job->reply()->error();
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 4, 2)
+    if (err == QNetworkReply::OperationCanceledError && job->reply()->property("owncloud-should-soft-cancel").isValid()) {        // Abort the job and try again later.
+        // This works around a bug in QNAM wich might reuse a non-empty buffer for the next request.
+        qDebug() << "Forcing job abort on HTTP connection reset with Qt < 5.4.2.";
+        _propagator->_anotherSyncNeeded = true;
+        abortWithError(SyncFileItem::SoftError, tr("Forcing job abort on HTTP connection reset with Qt < 5.4.2."));
+        return;
+    }
+#endif
+
+    if (err != QNetworkReply::NoError) {
+        _item->_httpErrorCode = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+        if(checkForProblemsWithShared(_item->_httpErrorCode,
+            tr("The file was edited locally but is part of a read only share. "
+               "It is restored and your edit is in the conflict file."))) {
+            return;
+        }
+        QByteArray replyContent = job->reply()->readAll();
+        qDebug() << replyContent; // display the XML error in the debug
+        QString errorString = errorMessage(job->errorString(), replyContent);
+
+        if (job->reply()->hasRawHeader("OC-ErrorString")) {
+            errorString = job->reply()->rawHeader("OC-ErrorString");
+        }
+
+        if (_item->_httpErrorCode == 412) {
+            // Precondition Failed:   Maybe the bad etag is in the database, we need to clear the
+            // parent folder etag so we won't read from DB next sync.
+            _propagator->_journal->avoidReadFromDbOnNextSync(_item->_file);
+            _propagator->_anotherSyncNeeded = true;
+        }
+
+        SyncFileItem::Status status = classifyError(err, _item->_httpErrorCode,
+                                                    &_propagator->_anotherSyncNeeded);
+        abortWithError(status, errorString);
+        return;
+    }
+
+    _item->_httpErrorCode = job->reply()->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
+    // The server needs some time to process the request and provide us with a poll URL
+    if (_item->_httpErrorCode == 202) {
+        _finished = true;
+        QString path =  QString::fromUtf8(job->reply()->rawHeader("OC-Finish-Poll"));
+        if (path.isEmpty()) {
+            done(SyncFileItem::NormalError, tr("Poll URL missing"));
+            return;
+        }
+        startPollJob(path);
+        return;
+    }
+
+    // Check the file again post upload.
+    // Two cases must be considered separately: If the upload is finished,
+    // the file is on the server and has a changed ETag. In that case,
+    // the etag has to be properly updated in the client journal, and because
+    // of that we can bail out here with an error. But we can reschedule a
+    // sync ASAP.
+    // But if the upload is ongoing, because not all chunks were uploaded
+    // yet, the upload can be stopped and an error can be displayed, because
+    // the server hasn't registered the new file yet.
+    QByteArray etag = getEtagFromReply(job->reply());
+    bool finished = etag.length() > 0;
+
+    // Check if the file still exists
+    const QString fullFilePath(_propagator->getFilePath(_item->_file));
+    if( !FileSystem::fileExists(fullFilePath) ) {
+        if (!finished) {
+            abortWithError(SyncFileItem::SoftError, tr("The local file was removed during sync."));
+            return;
+        } else {
+            _propagator->_anotherSyncNeeded = true;
+        }
+    }
+
+    // Check whether the file changed since discovery.
+    if (! FileSystem::verifyFileUnchanged(fullFilePath, _item->_size, _item->_modtime)) {
+        _propagator->_anotherSyncNeeded = true;
+        if( !finished ) {
+            abortWithError(SyncFileItem::SoftError, tr("Local file changed during sync."));
+            // FIXME:  the legacy code was retrying for a few seconds.
+            //         and also checking that after the last chunk, and removed the file in case of INSTRUCTION_NEW
+            return;
+        }
+    }
+
+    if (!finished) {
+        // Proceed to next chunk.
+        if (_currentChunk >= _chunkCount) {
+            if (!_jobs.empty()) {
+                // just wait for the other job to finish.
+                return;
+            }
+            _finished = true;
+            done(SyncFileItem::NormalError, tr("The server did not acknowledge the last chunk. (No e-tag was present)"));
+            return;
+        }
+
+        // Deletes an existing blacklist entry on successful chunk upload
+        if (_item->_hasBlacklistEntry) {
+            _propagator->_journal->wipeErrorBlacklistEntry(_item->_file);
+            _item->_hasBlacklistEntry = false;
+        }
+
+        SyncJournalDb::UploadInfo pi;
+        pi._valid = true;
+        auto currentChunk = job->_chunk;
+        foreach (auto *job, _jobs) {
+            // Take the minimum finished one
+            if (auto putJob = qobject_cast<PUTFileJob*>(job)) {
+                currentChunk = qMin(currentChunk, putJob->_chunk - 1);
+            }
+        }
+        pi._chunk = (currentChunk + _startChunk + 1) % _chunkCount ; // next chunk to start with
+        pi._transferid = _transferId;
+        pi._modtime =  Utility::qDateTimeFromTime_t(_item->_modtime);
+        _propagator->_journal->setUploadInfo(_item->_file, pi);
+        _propagator->_journal->commit("Upload info");
+        startNextChunk();
+        return;
+    }
+
+    // the following code only happens after all chunks were uploaded.
+    _finished = true;
+    // the file id should only be empty for new files up- or downloaded
+    QByteArray fid = job->reply()->rawHeader("OC-FileID");
+    if( !fid.isEmpty() ) {
+        if( !_item->_fileId.isEmpty() && _item->_fileId != fid ) {
+            qDebug() << "WARN: File ID changed!" << _item->_fileId << fid;
+        }
+        _item->_fileId = fid;
+    }
+
+    _item->_etag = etag;
+
+    _item->_responseTimeStamp = job->responseTimestamp();
+
+    if (job->reply()->rawHeader("X-OC-MTime") != "accepted") {
+        // X-OC-MTime is supported since owncloud 5.0.   But not when chunking.
+        // Normally Owncloud 6 always puts X-OC-MTime
+        qWarning() << "Server does not support X-OC-MTime" << job->reply()->rawHeader("X-OC-MTime");
+        // Well, the mtime was not set
+        done(SyncFileItem::SoftError, "Server does not support X-OC-MTime");
+    }
+
+    // performance logging
+    _item->_requestDuration = _stopWatch.stop();
+    qDebug() << "*==* duration UPLOAD" << _item->_size
+             << _stopWatch.durationOfLap(QLatin1String("ContentChecksum"))
+             << _stopWatch.durationOfLap(QLatin1String("TransmissionChecksum"))
+             << _item->_requestDuration;
+    // The job might stay alive for the whole sync, release this tiny bit of memory.
+    _stopWatch.reset();
+
+    finalize();
+}
+
+
+void PropagateUploadFileV1::slotUploadProgress(qint64 sent, qint64 total)
+{
+    // Completion is signaled with sent=0, total=0; avoid accidentally
+    // resetting progress due to the sent being zero by ignoring it.
+    // finishedSignal() is bound to be emitted soon anyway.
+    // See https://bugreports.qt.io/browse/QTBUG-44782.
+    if (sent == 0 && total == 0) {
+        return;
+    }
+
+    int progressChunk = _currentChunk + _startChunk - 1;
+    if (progressChunk >= _chunkCount)
+        progressChunk = _currentChunk - 1;
+
+    // amount is the number of bytes already sent by all the other chunks that were sent
+    // not including this one.
+    // FIXME: this assumes all chunks have the same size, which is true only if the last chunk
+    // has not been finished (which should not happen because the last chunk is sent sequentially)
+    quint64 amount = progressChunk * chunkSize();
+
+    sender()->setProperty("byteWritten", sent);
+    if (_jobs.count() > 1) {
+        amount -= (_jobs.count() -1) * chunkSize();
+        foreach (QObject *j, _jobs) {
+            amount += j->property("byteWritten").toULongLong();
+        }
+    } else {
+        // sender() is the only current job, no need to look at the byteWritten properties
+        amount += sent;
+    }
+    emit progress(*_item, amount);
+}
+
+}
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 2b2e4591d..fd817c734 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -47,6 +47,7 @@ owncloud_add_test(ExcludedFiles "")
 if(HAVE_QT5 AND NOT BUILD_WITH_QT4)
     owncloud_add_test(SyncEngine "syncenginetestutils.h")
     owncloud_add_test(SyncFileStatusTracker "syncenginetestutils.h")
+    owncloud_add_test(ChunkingNg "syncenginetestutils.h")
 endif(HAVE_QT5 AND NOT BUILD_WITH_QT4)
 
 SET(FolderMan_SRC ../src/gui/folderman.cpp)
diff --git a/test/syncenginetestutils.h b/test/syncenginetestutils.h
index 471bfee5d..514a3fca4 100644
--- a/test/syncenginetestutils.h
+++ b/test/syncenginetestutils.h
@@ -18,6 +18,20 @@
 #include <QtTest>
 
 static const QUrl sRootUrl("owncloud://somehost/owncloud/remote.php/webdav/");
+static const QUrl sRootUrl2("owncloud://somehost/owncloud/remote.php/dav/files/admin/");
+static const QUrl sUploadUrl("owncloud://somehost/owncloud/remote.php/dav/uploads/admin/");
+
+inline QString getFilePathFromUrl(const QUrl &url) {
+    QString path = url.path();
+    if (path.startsWith(sRootUrl.path()))
+        return path.mid(sRootUrl.path().length());
+    if (path.startsWith(sRootUrl2.path()))
+        return path.mid(sRootUrl2.path().length());
+    if (path.startsWith(sUploadUrl.path()))
+        return path.mid(sUploadUrl.path().length());
+    return {};
+}
+
 
 inline QString generateEtag() {
     return QString::number(QDateTime::currentDateTime().toMSecsSinceEpoch(), 16);
@@ -68,10 +82,15 @@ public:
         QFile file{_rootDir.filePath(relativePath)};
         QVERIFY(!file.exists());
         file.open(QFile::WriteOnly);
-        file.write(QByteArray{}.fill(contentChar, size));
+        QByteArray buf(1024, contentChar);
+        for (int x = 0; x < size/buf.size(); ++x) {
+            file.write(buf);
+        }
+        file.write(buf.data(), size % buf.size());
         file.close();
         // Set the mtime 30 seconds in the past, for some tests that need to make sure that the mtime differs.
         OCC::FileSystem::setModTime(file.fileName(), OCC::Utility::qDateTimeToTime_t(QDateTime::currentDateTime().addSecs(-30)));
+        QCOMPARE(file.size(), size);
     }
     void setContents(const QString &relativePath, char contentChar) override {
         QFile file{_rootDir.filePath(relativePath)};
@@ -284,6 +303,12 @@ public:
         setOperation(op);
         open(QIODevice::ReadOnly);
 
+        QString fileName = getFilePathFromUrl(request.url());
+        Q_ASSERT(!fileName.isNull()); // for root, it should be empty
+        const FileInfo *fileInfo = remoteRootFileInfo.find(fileName);
+        Q_ASSERT(fileInfo);
+        QString prefix = request.url().path().left(request.url().path().size() - fileName.size());
+
         // Don't care about the request and just return a full propfind
         const QString davUri{QStringLiteral("DAV:")};
         const QString ocUri{QStringLiteral("http://owncloud.org/ns")};
@@ -297,7 +322,7 @@ public:
         auto writeFileResponse = [&](const FileInfo &fileInfo) {
             xml.writeStartElement(davUri, QStringLiteral("response"));
 
-            xml.writeTextElement(davUri, QStringLiteral("href"), "/owncloud/remote.php/webdav/" + fileInfo.path());
+            xml.writeTextElement(davUri, QStringLiteral("href"), prefix + fileInfo.path());
             xml.writeStartElement(davUri, QStringLiteral("propstat"));
             xml.writeStartElement(davUri, QStringLiteral("prop"));
 
@@ -322,11 +347,6 @@ public:
             xml.writeEndElement(); // response
         };
 
-        Q_ASSERT(request.url().path().startsWith(sRootUrl.path()));
-        QString fileName = request.url().path().mid(sRootUrl.path().length());
-        const FileInfo *fileInfo = remoteRootFileInfo.find(fileName);
-        Q_ASSERT(fileInfo);
-
         writeFileResponse(*fileInfo);
         foreach(const FileInfo &childFileInfo, fileInfo->children)
            writeFileResponse(childFileInfo);
@@ -370,8 +390,8 @@ public:
         setOperation(op);
         open(QIODevice::ReadOnly);
 
-        Q_ASSERT(request.url().path().startsWith(sRootUrl.path()));
-        QString fileName = request.url().path().mid(sRootUrl.path().length());
+        QString fileName = getFilePathFromUrl(request.url());
+        Q_ASSERT(!fileName.isEmpty());
         if ((fileInfo = remoteRootFileInfo.find(fileName))) {
             fileInfo->size = putPayload.size();
             fileInfo->contentChar = putPayload.at(0);
@@ -388,6 +408,7 @@ public:
     }
 
     Q_INVOKABLE void respond() {
+        emit uploadProgress(fileInfo->size, fileInfo->size);
         setRawHeader("OC-ETag", fileInfo->etag.toLatin1());
         setRawHeader("ETag", fileInfo->etag.toLatin1());
         setRawHeader("X-OC-MTime", "accepted"); // Prevents Q_ASSERT(!_runningNow) since we'll call PropagateItemJob::done twice in that case.
@@ -412,8 +433,8 @@ public:
         setOperation(op);
         open(QIODevice::ReadOnly);
 
-        Q_ASSERT(request.url().path().startsWith(sRootUrl.path()));
-        QString fileName = request.url().path().mid(sRootUrl.path().length());
+        QString fileName = getFilePathFromUrl(request.url());
+        Q_ASSERT(!fileName.isEmpty());
         fileInfo = remoteRootFileInfo.createDir(fileName);
 
         if (!fileInfo) {
@@ -445,8 +466,8 @@ public:
         setOperation(op);
         open(QIODevice::ReadOnly);
 
-        Q_ASSERT(request.url().path().startsWith(sRootUrl.path()));
-        QString fileName = request.url().path().mid(sRootUrl.path().length());
+        QString fileName = getFilePathFromUrl(request.url());
+        Q_ASSERT(!fileName.isEmpty());
         remoteRootFileInfo.remove(fileName);
         QMetaObject::invokeMethod(this, "respond", Qt::QueuedConnection);
     }
@@ -472,11 +493,10 @@ public:
         setOperation(op);
         open(QIODevice::ReadOnly);
 
-        Q_ASSERT(request.url().path().startsWith(sRootUrl.path()));
-        QString fileName = request.url().path().mid(sRootUrl.path().length());
-        QString destPath = request.rawHeader("Destination");
-        Q_ASSERT(destPath.startsWith(sRootUrl.path()));
-        QString dest = destPath.mid(sRootUrl.path().length());
+        QString fileName = getFilePathFromUrl(request.url());
+        Q_ASSERT(!fileName.isEmpty());
+        QString dest = getFilePathFromUrl(QUrl::fromEncoded(request.rawHeader("Destination")));
+        Q_ASSERT(!dest.isEmpty());
         remoteRootFileInfo.rename(fileName, dest);
         QMetaObject::invokeMethod(this, "respond", Qt::QueuedConnection);
     }
@@ -505,8 +525,8 @@ public:
         setOperation(op);
         open(QIODevice::ReadOnly);
 
-        Q_ASSERT(request.url().path().startsWith(sRootUrl.path()));
-        QString fileName = request.url().path().mid(sRootUrl.path().length());
+        QString fileName = getFilePathFromUrl(request.url());
+        Q_ASSERT(!fileName.isEmpty());
         fileInfo = remoteRootFileInfo.find(fileName);
         QMetaObject::invokeMethod(this, "respond", Qt::QueuedConnection);
     }
@@ -535,6 +555,79 @@ public:
     }
 };
 
+
+class FakeChunkMoveReply : public QNetworkReply
+{
+    Q_OBJECT
+    FileInfo *fileInfo;
+public:
+    FakeChunkMoveReply(FileInfo &uploadsFileInfo, FileInfo &remoteRootFileInfo,
+                       QNetworkAccessManager::Operation op, const QNetworkRequest &request,
+                       QObject *parent) : QNetworkReply{parent} {
+        setRequest(request);
+        setUrl(request.url());
+        setOperation(op);
+        open(QIODevice::ReadOnly);
+
+        QString source = getFilePathFromUrl(request.url());
+        Q_ASSERT(!source.isEmpty());
+        Q_ASSERT(source.endsWith("/.file"));
+        source = source.left(source.length() - qstrlen("/.file"));
+        auto sourceFolder = uploadsFileInfo.find(source);
+        Q_ASSERT(sourceFolder);
+        Q_ASSERT(sourceFolder->isDir);
+        int count = 0;
+        int size = 0;
+        char payload = '*';
+
+        do {
+            if (!sourceFolder->children.contains(QString::number(count)))
+                break;
+            auto &x = sourceFolder->children[QString::number(count)];
+            Q_ASSERT(!x.isDir);
+            Q_ASSERT(x.size > 0); // There should not be empty chunks
+            size += x.size;
+            payload = x.contentChar;
+            ++count;
+        } while(true);
+
+        Q_ASSERT(count > 1); // There should be at least two chunks, otherwise why would we use chunking?
+        QCOMPARE(sourceFolder->children.count(), count); // There should not be holes or extra files
+
+        QString fileName = getFilePathFromUrl(QUrl::fromEncoded(request.rawHeader("Destination")));
+        Q_ASSERT(!fileName.isEmpty());
+
+        if ((fileInfo = remoteRootFileInfo.find(fileName))) {
+            QCOMPARE(request.rawHeader("If"), QByteArray("<" + request.rawHeader("Destination") + "> ([\"" + fileInfo->etag.toLatin1() + "\"])"));
+            fileInfo->size = size;
+            fileInfo->contentChar = payload;
+        } else {
+            Q_ASSERT(!request.hasRawHeader("If"));
+            // Assume that the file is filled with the same character
+            fileInfo = remoteRootFileInfo.create(fileName, size, payload);
+        }
+
+        if (!fileInfo) {
+            abort();
+            return;
+        }
+        QMetaObject::invokeMethod(this, "respond", Qt::QueuedConnection);
+    }
+
+    Q_INVOKABLE void respond() {
+        setAttribute(QNetworkRequest::HttpStatusCodeAttribute, 201);
+        setRawHeader("OC-ETag", fileInfo->etag.toLatin1());
+        setRawHeader("ETag", fileInfo->etag.toLatin1());
+        setRawHeader("OC-FileId", fileInfo->fileId);
+        emit metaDataChanged();
+        emit finished();
+    }
+
+    void abort() override { }
+    qint64 readData(char *, qint64) override { return 0; }
+};
+
+
 class FakeErrorReply : public QNetworkReply
 {
     Q_OBJECT
@@ -561,33 +654,41 @@ public:
 class FakeQNAM : public QNetworkAccessManager
 {
     FileInfo _remoteRootFileInfo;
+    FileInfo _uploadFileInfo;
     QStringList _errorPaths;
 public:
     FakeQNAM(FileInfo initialRoot) : _remoteRootFileInfo{std::move(initialRoot)} { }
     FileInfo &currentRemoteState() { return _remoteRootFileInfo; }
+    FileInfo &uploadState() { return _uploadFileInfo; }
     QStringList &errorPaths() { return _errorPaths; }
 
 protected:
     QNetworkReply *createRequest(Operation op, const QNetworkRequest &request,
                                          QIODevice *outgoingData = 0) {
-        const QString fileName = request.url().path().mid(sRootUrl.path().length());
+        const QString fileName = getFilePathFromUrl(request.url());
+        Q_ASSERT(!fileName.isNull());
         if (_errorPaths.contains(fileName))
             return new FakeErrorReply{op, request, this};
 
+        bool isUpload = request.url().path().startsWith(sUploadUrl.path());
+        FileInfo &info = isUpload ? _uploadFileInfo : _remoteRootFileInfo;
+
         auto verb = request.attribute(QNetworkRequest::CustomVerbAttribute);
         if (verb == QLatin1String("PROPFIND"))
             // Ignore outgoingData always returning somethign good enough, works for now.
-            return new FakePropfindReply{_remoteRootFileInfo, op, request, this};
+            return new FakePropfindReply{info, op, request, this};
         else if (verb == QLatin1String("GET"))
-            return new FakeGetReply{_remoteRootFileInfo, op, request, this};
+            return new FakeGetReply{info, op, request, this};
         else if (verb == QLatin1String("PUT"))
-            return new FakePutReply{_remoteRootFileInfo, op, request, outgoingData->readAll(), this};
+            return new FakePutReply{info, op, request, outgoingData->readAll(), this};
         else if (verb == QLatin1String("MKCOL"))
-            return new FakeMkcolReply{_remoteRootFileInfo, op, request, this};
+            return new FakeMkcolReply{info, op, request, this};
         else if (verb == QLatin1String("DELETE"))
-            return new FakeDeleteReply{_remoteRootFileInfo, op, request, this};
-        else if (verb == QLatin1String("MOVE"))
-            return new FakeMoveReply{_remoteRootFileInfo, op, request, this};
+            return new FakeDeleteReply{info, op, request, this};
+        else if (verb == QLatin1String("MOVE") && !isUpload)
+            return new FakeMoveReply{info, op, request, this};
+        else if (verb == QLatin1String("MOVE") && isUpload)
+            return new FakeChunkMoveReply{info, _remoteRootFileInfo, op, request, this};
         else {
             qDebug() << verb << outgoingData;
             Q_UNREACHABLE();
@@ -659,6 +760,7 @@ public:
     }
 
     FileInfo currentRemoteState() { return _fakeQnam->currentRemoteState(); }
+    FileInfo &uploadState() { return _fakeQnam->uploadState(); }
 
     QStringList &serverErrorPaths() { return _fakeQnam->errorPaths(); }
 
@@ -695,14 +797,16 @@ public:
         QVERIFY(false);
     }
 
-    void execUntilFinished() {
+    bool execUntilFinished() {
         QSignalSpy spy(_syncEngine.get(), SIGNAL(finished(bool)));
-        QVERIFY(spy.wait());
+        bool ok = spy.wait(60000);
+        Q_ASSERT(ok && "Sync timed out");
+        return spy[0][0].toBool();
     }
 
-    void syncOnce() {
+    bool syncOnce() {
         scheduleSync();
-        execUntilFinished();
+        return execUntilFinished();
     }
 
 private:
diff --git a/test/testchunkingng.cpp b/test/testchunkingng.cpp
new file mode 100644
index 000000000..21225c210
--- /dev/null
+++ b/test/testchunkingng.cpp
@@ -0,0 +1,78 @@
+/*
+ *    This software is in the public domain, furnished "as is", without technical
+ *    support, and with no warranty, express or implied, as to its usefulness for
+ *    any purpose.
+ *
+ */
+
+#include <QtTest>
+#include "syncenginetestutils.h"
+#include <syncengine.h>
+
+using namespace OCC;
+
+class TestChunkingNG : public QObject
+{
+    Q_OBJECT
+
+private slots:
+
+    void testFileUpload() {
+        FakeFolder fakeFolder{FileInfo::A12_B12_C12_S12()};
+        fakeFolder.syncEngine().account()->setCapabilities({ { "dav", QVariantMap{ {"chunking", "1.0"} } } });
+        const int size = 300 * 1000 * 1000; // 300 MB
+        fakeFolder.localModifier().insert("A/a0", size);
+        QVERIFY(fakeFolder.syncOnce());
+        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
+        QCOMPARE(fakeFolder.uploadState().children.count(), 1); // the transfer was done with chunking
+        QCOMPARE(fakeFolder.currentRemoteState().find("A/a0")->size, size);
+
+        // Check that another upload of the same file also work.
+        fakeFolder.localModifier().appendByte("A/a0");
+        QVERIFY(fakeFolder.syncOnce());
+        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
+        QCOMPARE(fakeFolder.uploadState().children.count(), 2); // the transfer was done with chunking
+    }
+
+
+    void testResume () {
+
+        FakeFolder fakeFolder{FileInfo::A12_B12_C12_S12()};
+        fakeFolder.syncEngine().account()->setCapabilities({ { "dav", QVariantMap{ {"chunking", "1.0"} } } });
+        const int size = 300 * 1000 * 1000; // 300 MB
+        fakeFolder.localModifier().insert("A/a0", size);
+
+        // Abort when the upload is at 1/3
+        int sizeWhenAbort = -1;
+        auto con = QObject::connect(&fakeFolder.syncEngine(),  &SyncEngine::transmissionProgress,
+                                    [&](const ProgressInfo &progress) {
+                if (progress.completedSize() > (progress.totalSize() /3 )) {
+                    sizeWhenAbort = progress.completedSize();
+                    fakeFolder.syncEngine().abort();
+                }
+        });
+
+        QVERIFY(!fakeFolder.syncOnce()); // there should have been an error
+        QObject::disconnect(con);
+        QVERIFY(sizeWhenAbort > 0);
+        QVERIFY(sizeWhenAbort < size);
+        QCOMPARE(fakeFolder.uploadState().children.count(), 1); // the transfer was done with chunking
+        auto upStateChildren = fakeFolder.uploadState().children.first().children;
+        QCOMPARE(sizeWhenAbort, std::accumulate(upStateChildren.cbegin(), upStateChildren.cend(), 0,
+                                               [](int s, const FileInfo &i) { return s + i.size; }));
+
+
+        // Add a fake file to make sure it gets deleted
+        fakeFolder.uploadState().children.first().insert("10000", size);
+        QVERIFY(fakeFolder.syncOnce());
+
+
+
+        QCOMPARE(fakeFolder.currentLocalState(), fakeFolder.currentRemoteState());
+        QCOMPARE(fakeFolder.uploadState().children.count(), 1); // The same chunk id was re-used
+        QCOMPARE(fakeFolder.currentRemoteState().find("A/a0")->size, size);
+    }
+};
+
+QTEST_GUILESS_MAIN(TestChunkingNG)
+#include "testchunkingng.moc"