tdesktop/Telegram/SourceFiles/storage/file_download.cpp

1640 lines
42 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "storage/file_download.h"
#include "data/data_document.h"
#include "data/data_session.h"
#include "data/data_file_origin.h"
#include "mainwidget.h"
#include "mainwindow.h"
#include "core/application.h"
#include "storage/localstorage.h"
#include "platform/platform_file_utilities.h"
#include "mtproto/connection.h" // for MTP::kAckSendWaiting
#include "auth_session.h"
#include "apiwrap.h"
#include "core/crash_reports.h"
#include "base/bytes.h"
#include "base/openssl_help.h"
namespace Storage {
namespace {
// How much time without download causes additional session kill.
constexpr auto kKillSessionTimeout = crl::time(5000);
} // namespace
Downloader::Downloader()
: _killDownloadSessionsTimer([=] { killDownloadSessions(); }) {
}
void Downloader::clearPriorities() {
++_priority;
}
void Downloader::requestedAmountIncrement(MTP::DcId dcId, int index, int amount) {
Expects(index >= 0 && index < MTP::kDownloadSessionsCount);
auto it = _requestedBytesAmount.find(dcId);
if (it == _requestedBytesAmount.cend()) {
it = _requestedBytesAmount.emplace(dcId, RequestedInDc { { 0 } }).first;
}
it->second[index] += amount;
if (it->second[index]) {
killDownloadSessionsStop(dcId);
} else {
killDownloadSessionsStart(dcId);
}
}
void Downloader::killDownloadSessionsStart(MTP::DcId dcId) {
if (!_killDownloadSessionTimes.contains(dcId)) {
_killDownloadSessionTimes.emplace(
dcId,
crl::now() + MTP::kAckSendWaiting + kKillSessionTimeout);
}
if (!_killDownloadSessionsTimer.isActive()) {
_killDownloadSessionsTimer.callOnce(
MTP::kAckSendWaiting + kKillSessionTimeout + 5);
}
}
void Downloader::killDownloadSessionsStop(MTP::DcId dcId) {
_killDownloadSessionTimes.erase(dcId);
if (_killDownloadSessionTimes.empty()
&& _killDownloadSessionsTimer.isActive()) {
_killDownloadSessionsTimer.cancel();
}
}
void Downloader::killDownloadSessions() {
auto ms = crl::now(), left = MTP::kAckSendWaiting + kKillSessionTimeout;
for (auto i = _killDownloadSessionTimes.begin(); i != _killDownloadSessionTimes.end(); ) {
if (i->second <= ms) {
for (int j = 0; j < MTP::kDownloadSessionsCount; ++j) {
MTP::stopSession(MTP::downloadDcId(i->first, j));
}
i = _killDownloadSessionTimes.erase(i);
} else {
if (i->second - ms < left) {
left = i->second - ms;
}
++i;
}
}
if (!_killDownloadSessionTimes.empty()) {
_killDownloadSessionsTimer.callOnce(left);
}
}
int Downloader::chooseDcIndexForRequest(MTP::DcId dcId) const {
auto result = 0;
auto it = _requestedBytesAmount.find(dcId);
if (it != _requestedBytesAmount.cend()) {
for (auto i = 1; i != MTP::kDownloadSessionsCount; ++i) {
if (it->second[i] < it->second[result]) {
result = i;
}
}
}
return result;
}
Downloader::~Downloader() {
killDownloadSessions();
}
} // namespace Storage
namespace {
constexpr auto kDownloadPhotoPartSize = 64 * 1024; // 64kb for photo
constexpr auto kDownloadDocumentPartSize = 128 * 1024; // 128kb for document
constexpr auto kMaxFileQueries = 16; // max 16 file parts downloaded at the same time
constexpr auto kMaxWebFileQueries = 8; // max 8 http[s] files downloaded at the same time
constexpr auto kDownloadCdnPartSize = 128 * 1024; // 128kb for cdn requests
} // namespace
struct FileLoaderQueue {
FileLoaderQueue(int queriesLimit) : queriesLimit(queriesLimit) {
}
int queriesCount = 0;
int queriesLimit = 0;
FileLoader *start = nullptr;
FileLoader *end = nullptr;
};
namespace {
using LoaderQueues = QMap<int32, FileLoaderQueue>;
LoaderQueues queues;
FileLoaderQueue _webQueue(kMaxWebFileQueries);
QThread *_webLoadThread = nullptr;
WebLoadManager *_webLoadManager = nullptr;
WebLoadManager *webLoadManager() {
return (_webLoadManager && _webLoadManager != FinishedWebLoadManager) ? _webLoadManager : nullptr;
}
WebLoadMainManager *_webLoadMainManager = nullptr;
} // namespace
FileLoader::FileLoader(
const QString &toFile,
int32 size,
LocationType locationType,
LoadToCacheSetting toCache,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag)
: _downloader(&Auth().downloader())
, _autoLoading(autoLoading)
, _cacheTag(cacheTag)
, _filename(toFile)
, _file(_filename)
, _toCache(toCache)
, _fromCloud(fromCloud)
, _size(size)
, _locationType(locationType) {
Expects(!_filename.isEmpty() || (_size <= Storage::kMaxFileInMemory));
}
void FileLoader::finishWithBytes(const QByteArray &data) {
_data = data;
_localStatus = LocalStatus::Loaded;
if (!_filename.isEmpty() && _toCache == LoadToCacheAsWell) {
if (!_fileIsOpen) _fileIsOpen = _file.open(QIODevice::WriteOnly);
if (!_fileIsOpen) {
cancel(true);
return;
}
if (_file.write(_data) != qint64(_data.size())) {
cancel(true);
return;
}
}
_finished = true;
if (_fileIsOpen) {
_file.close();
_fileIsOpen = false;
Platform::File::PostprocessDownloaded(
QFileInfo(_file).absoluteFilePath());
}
_downloader->taskFinished().notify();
}
QByteArray FileLoader::imageFormat(const QSize &shrinkBox) const {
if (_imageFormat.isEmpty() && _locationType == UnknownFileLocation) {
readImage(shrinkBox);
}
return _imageFormat;
}
QImage FileLoader::imageData(const QSize &shrinkBox) const {
if (_imageData.isNull() && _locationType == UnknownFileLocation) {
readImage(shrinkBox);
}
return _imageData;
}
void FileLoader::readImage(const QSize &shrinkBox) const {
auto format = QByteArray();
auto image = App::readImage(_data, &format, false);
if (!image.isNull()) {
if (!shrinkBox.isEmpty() && (image.width() > shrinkBox.width() || image.height() > shrinkBox.height())) {
_imageData = image.scaled(shrinkBox, Qt::KeepAspectRatio, Qt::SmoothTransformation);
} else {
_imageData = std::move(image);
}
_imageFormat = format;
}
}
Data::FileOrigin FileLoader::fileOrigin() const {
return Data::FileOrigin();
}
float64 FileLoader::currentProgress() const {
if (_finished) return 1.;
if (!fullSize()) return 0.;
return snap(float64(currentOffset()) / fullSize(), 0., 1.);
}
int32 FileLoader::fullSize() const {
return _size;
}
bool FileLoader::setFileName(const QString &fileName) {
if (_toCache != LoadToCacheAsWell || !_filename.isEmpty()) {
return fileName.isEmpty() || (fileName == _filename);
}
_filename = fileName;
_file.setFileName(_filename);
return true;
}
void FileLoader::permitLoadFromCloud() {
_fromCloud = LoadFromCloudOrLocal;
}
void FileLoader::notifyAboutProgress() {
const auto queue = _queue;
emit progress(this);
LoadNextFromQueue(queue);
}
void FileLoader::LoadNextFromQueue(not_null<FileLoaderQueue*> queue) {
if (queue->queriesCount >= queue->queriesLimit) {
return;
}
for (auto i = queue->start; i;) {
if (i->loadPart()) {
if (queue->queriesCount >= queue->queriesLimit) {
return;
}
} else {
i = i->_next;
}
}
}
void FileLoader::removeFromQueue() {
if (!_inQueue) return;
if (_next) {
_next->_prev = _prev;
}
if (_prev) {
_prev->_next = _next;
}
if (_queue->end == this) {
_queue->end = _prev;
}
if (_queue->start == this) {
_queue->start = _next;
}
_next = _prev = 0;
_inQueue = false;
}
void FileLoader::pause() {
removeFromQueue();
_paused = true;
}
FileLoader::~FileLoader() {
removeFromQueue();
}
void FileLoader::localLoaded(
const StorageImageSaved &result,
const QByteArray &imageFormat,
const QImage &imageData) {
_localLoading = nullptr;
if (result.data.isEmpty()) {
_localStatus = LocalStatus::NotFound;
start(true);
return;
}
if (!imageData.isNull()) {
_imageFormat = imageFormat;
_imageData = imageData;
}
finishWithBytes(result.data);
notifyAboutProgress();
}
void FileLoader::start(bool loadFirst, bool prior) {
if (_paused) {
_paused = false;
}
if (_finished || tryLoadLocal()) {
return;
} else if (_fromCloud == LoadFromLocalOnly) {
cancel();
return;
}
if (!_filename.isEmpty() && _toCache == LoadToFileOnly && !_fileIsOpen) {
_fileIsOpen = _file.open(QIODevice::WriteOnly);
if (!_fileIsOpen) {
return cancel(true);
}
}
auto currentPriority = _downloader->currentPriority();
FileLoader *before = 0, *after = 0;
if (prior) {
if (_inQueue && _priority == currentPriority) {
if (loadFirst) {
if (!_prev) return startLoading(loadFirst, prior);
before = _queue->start;
} else {
if (!_next || _next->_priority < currentPriority) return startLoading(loadFirst, prior);
after = _next;
while (after->_next && after->_next->_priority == currentPriority) {
after = after->_next;
}
}
} else {
_priority = currentPriority;
if (loadFirst) {
if (_inQueue && !_prev) return startLoading(loadFirst, prior);
before = _queue->start;
} else {
if (_inQueue) {
if (_next && _next->_priority == currentPriority) {
after = _next;
} else if (_prev && _prev->_priority < currentPriority) {
before = _prev;
while (before->_prev && before->_prev->_priority < currentPriority) {
before = before->_prev;
}
} else {
return startLoading(loadFirst, prior);
}
} else {
if (_queue->start && _queue->start->_priority == currentPriority) {
after = _queue->start;
} else {
before = _queue->start;
}
}
if (after) {
while (after->_next && after->_next->_priority == currentPriority) {
after = after->_next;
}
}
}
}
} else {
if (loadFirst) {
if (_inQueue && (!_prev || _prev->_priority == currentPriority)) return startLoading(loadFirst, prior);
before = _prev;
while (before->_prev && before->_prev->_priority != currentPriority) {
before = before->_prev;
}
} else {
if (_inQueue && !_next) return startLoading(loadFirst, prior);
after = _queue->end;
}
}
removeFromQueue();
_inQueue = true;
if (!_queue->start) {
_queue->start = _queue->end = this;
} else if (before) {
if (before != _next) {
_prev = before->_prev;
_next = before;
_next->_prev = this;
if (_prev) {
_prev->_next = this;
}
if (_queue->start->_prev) _queue->start = _queue->start->_prev;
}
} else if (after) {
if (after != _prev) {
_next = after->_next;
_prev = after;
after->_next = this;
if (_next) {
_next->_prev = this;
}
if (_queue->end->_next) _queue->end = _queue->end->_next;
}
} else {
LOG(("Queue Error: _start && !before && !after"));
}
return startLoading(loadFirst, prior);
}
void FileLoader::loadLocal(const Storage::Cache::Key &key) {
const auto readImage = (_locationType != AudioFileLocation);
auto done = [=, guard = _localLoading.make_guard()](
QByteArray &&value,
QImage &&image,
QByteArray &&format) mutable {
crl::on_main(std::move(guard), [
=,
value = std::move(value),
image = std::move(image),
format = std::move(format)
]() mutable {
localLoaded(
StorageImageSaved(std::move(value)),
format,
std::move(image));
});
};
Auth().data().cache().get(key, [=, callback = std::move(done)](
QByteArray &&value) mutable {
if (readImage) {
crl::async([
value = std::move(value),
done = std::move(callback)
]() mutable {
auto format = QByteArray();
auto image = App::readImage(value, &format, false);
if (!image.isNull()) {
done(
std::move(value),
std::move(image),
std::move(format));
} else {
done(std::move(value), {}, {});
}
});
} else {
callback(std::move(value), {}, {});
}
});
}
bool FileLoader::tryLoadLocal() {
if (_localStatus == LocalStatus::NotFound
|| _localStatus == LocalStatus::Loaded) {
return false;
} else if (_localStatus == LocalStatus::Loading) {
return true;
}
const auto weak = make_weak(this);
if (const auto key = cacheKey()) {
loadLocal(*key);
emit progress(this);
}
if (!weak) {
return false;
} else if (_localStatus != LocalStatus::NotTried) {
return _finished;
} else if (_localLoading) {
_localStatus = LocalStatus::Loading;
return true;
}
_localStatus = LocalStatus::NotFound;
return false;
}
void FileLoader::cancel() {
cancel(false);
}
void FileLoader::cancel(bool fail) {
bool started = currentOffset(true) > 0;
cancelRequests();
_cancelled = true;
_finished = true;
if (_fileIsOpen) {
_file.close();
_fileIsOpen = false;
_file.remove();
}
_data = QByteArray();
removeFromQueue();
const auto queue = _queue;
const auto weak = make_weak(this);
if (fail) {
emit failed(this, started);
} else {
emit progress(this);
}
if (weak) {
_filename = QString();
_file.setFileName(_filename);
}
LoadNextFromQueue(queue);
}
void FileLoader::startLoading(bool loadFirst, bool prior) {
if ((_queue->queriesCount >= _queue->queriesLimit && (!loadFirst || !prior)) || _finished) {
return;
}
loadPart();
}
mtpFileLoader::mtpFileLoader(
const StorageFileLocation &location,
Data::FileOrigin origin,
LocationType type,
const QString &to,
int32 size,
LoadToCacheSetting toCache,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag)
: FileLoader(
to,
size,
type,
toCache,
fromCloud,
autoLoading,
cacheTag)
, _location(location)
, _origin(origin) {
auto shiftedDcId = MTP::downloadDcId(dcId(), 0);
auto i = queues.find(shiftedDcId);
if (i == queues.cend()) {
i = queues.insert(shiftedDcId, FileLoaderQueue(kMaxFileQueries));
}
_queue = &i.value();
}
mtpFileLoader::mtpFileLoader(
const WebFileLocation &location,
int32 size,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag)
: FileLoader(
QString(),
size,
UnknownFileLocation,
LoadToCacheAsWell,
fromCloud,
autoLoading,
cacheTag)
, _location(location) {
auto shiftedDcId = MTP::downloadDcId(dcId(), 0);
auto i = queues.find(shiftedDcId);
if (i == queues.cend()) {
i = queues.insert(shiftedDcId, FileLoaderQueue(kMaxFileQueries));
}
_queue = &i.value();
}
mtpFileLoader::mtpFileLoader(
const GeoPointLocation &location,
int32 size,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag)
: FileLoader(
QString(),
size,
UnknownFileLocation,
LoadToCacheAsWell,
fromCloud,
autoLoading,
cacheTag)
, _location(location) {
auto shiftedDcId = MTP::downloadDcId(dcId(), 0);
auto i = queues.find(shiftedDcId);
if (i == queues.cend()) {
i = queues.insert(shiftedDcId, FileLoaderQueue(kMaxFileQueries));
}
_queue = &i.value();
}
int32 mtpFileLoader::currentOffset(bool includeSkipped) const {
return (_fileIsOpen ? _file.size() : _data.size())
- (includeSkipped ? 0 : _skippedBytes);
}
Data::FileOrigin mtpFileLoader::fileOrigin() const {
return _origin;
}
uint64 mtpFileLoader::objId() const {
if (const auto storage = base::get_if<StorageFileLocation>(&_location)) {
return storage->objectId();
}
return 0;
}
void mtpFileLoader::refreshFileReferenceFrom(
const Data::UpdatedFileReferences &updates,
int requestId,
const QByteArray &current) {
if (const auto storage = base::get_if<StorageFileLocation>(&_location)) {
storage->refreshFileReference(updates);
if (storage->fileReference() == current) {
cancel(true);
return;
}
} else {
cancel(true);
return;
}
const auto offset = finishSentRequestGetOffset(requestId);
makeRequest(offset);
}
bool mtpFileLoader::loadPart() {
if (_finished || _lastComplete || (!_sentRequests.empty() && !_size)) {
return false;
} else if (_size && _nextRequestOffset >= _size) {
return false;
}
makeRequest(_nextRequestOffset);
_nextRequestOffset += partSize();
return true;
}
MTP::DcId mtpFileLoader::dcId() const {
if (const auto storage = base::get_if<StorageFileLocation>(&_location)) {
return storage->dcId();
}
return Global::WebFileDcId();
}
int mtpFileLoader::partSize() const {
return kDownloadCdnPartSize;
// Different part sizes are not supported for now :(
// Because we start downloading with some part size
// and then we get a cdn-redirect where we support only
// fixed part size download for hash checking.
//
//if (_cdnDcId) {
// return kDownloadCdnPartSize;
//} else if (_locationType == UnknownFileLocation) {
// return kDownloadPhotoPartSize;
//}
//return kDownloadDocumentPartSize;
}
mtpFileLoader::RequestData mtpFileLoader::prepareRequest(int offset) const {
auto result = RequestData();
result.dcId = _cdnDcId ? _cdnDcId : dcId();
result.dcIndex = _size
? _downloader->chooseDcIndexForRequest(result.dcId)
: 0;
result.offset = offset;
return result;
}
mtpRequestId mtpFileLoader::sendRequest(const RequestData &requestData) {
const auto offset = requestData.offset;
const auto limit = partSize();
const auto shiftedDcId = MTP::downloadDcId(
requestData.dcId,
requestData.dcIndex);
if (_cdnDcId) {
Assert(requestData.dcId == _cdnDcId);
return MTP::send(
MTPupload_GetCdnFile(
MTP_bytes(_cdnToken),
MTP_int(offset),
MTP_int(limit)),
rpcDone(&mtpFileLoader::cdnPartLoaded),
rpcFail(&mtpFileLoader::cdnPartFailed),
shiftedDcId,
50);
}
return _location.match([&](const WebFileLocation &location) {
return MTP::send(
MTPupload_GetWebFile(
MTP_inputWebFileLocation(
MTP_bytes(location.url()),
MTP_long(location.accessHash())),
MTP_int(offset),
MTP_int(limit)),
rpcDone(&mtpFileLoader::webPartLoaded),
rpcFail(&mtpFileLoader::partFailed),
shiftedDcId,
50);
}, [&](const GeoPointLocation &location) {
return MTP::send(
MTPupload_GetWebFile(
MTP_inputWebFileGeoPointLocation(
MTP_inputGeoPoint(
MTP_double(location.lat),
MTP_double(location.lon)),
MTP_long(location.access),
MTP_int(location.width),
MTP_int(location.height),
MTP_int(location.zoom),
MTP_int(location.scale)),
MTP_int(offset),
MTP_int(limit)),
rpcDone(&mtpFileLoader::webPartLoaded),
rpcFail(&mtpFileLoader::partFailed),
shiftedDcId,
50);
}, [&](const StorageFileLocation &location) {
return MTP::send(
MTPupload_GetFile(
location.tl(Auth().userId()),
MTP_int(offset),
MTP_int(limit)),
rpcDone(&mtpFileLoader::normalPartLoaded),
rpcFail(
&mtpFileLoader::normalPartFailed,
location.fileReference()),
shiftedDcId,
50);
});
}
void mtpFileLoader::makeRequest(int offset) {
Expects(!_finished);
auto requestData = prepareRequest(offset);
placeSentRequest(sendRequest(requestData), requestData);
}
void mtpFileLoader::requestMoreCdnFileHashes() {
Expects(!_finished);
if (_cdnHashesRequestId || _cdnUncheckedParts.empty()) {
return;
}
auto offset = _cdnUncheckedParts.cbegin()->first;
auto requestData = RequestData();
requestData.dcId = dcId();
requestData.dcIndex = 0;
requestData.offset = offset;
auto shiftedDcId = MTP::downloadDcId(
requestData.dcId,
requestData.dcIndex);
auto requestId = _cdnHashesRequestId = MTP::send(
MTPupload_GetCdnFileHashes(
MTP_bytes(_cdnToken),
MTP_int(offset)),
rpcDone(&mtpFileLoader::getCdnFileHashesDone),
rpcFail(&mtpFileLoader::cdnPartFailed),
shiftedDcId);
placeSentRequest(requestId, requestData);
}
void mtpFileLoader::normalPartLoaded(
const MTPupload_File &result,
mtpRequestId requestId) {
Expects(!_finished);
Expects(result.type() == mtpc_upload_fileCdnRedirect || result.type() == mtpc_upload_file);
auto offset = finishSentRequestGetOffset(requestId);
if (result.type() == mtpc_upload_fileCdnRedirect) {
return switchToCDN(offset, result.c_upload_fileCdnRedirect());
}
auto buffer = bytes::make_span(result.c_upload_file().vbytes.v);
return partLoaded(offset, buffer);
}
void mtpFileLoader::webPartLoaded(
const MTPupload_WebFile &result,
mtpRequestId requestId) {
Expects(result.type() == mtpc_upload_webFile);
auto offset = finishSentRequestGetOffset(requestId);
auto &webFile = result.c_upload_webFile();
if (!_size) {
_size = webFile.vsize.v;
} else if (webFile.vsize.v != _size) {
LOG(("MTP Error: Bad size provided by bot for webDocument: %1, real: %2").arg(_size).arg(webFile.vsize.v));
return cancel(true);
}
auto buffer = bytes::make_span(webFile.vbytes.v);
return partLoaded(offset, buffer);
}
void mtpFileLoader::cdnPartLoaded(const MTPupload_CdnFile &result, mtpRequestId requestId) {
Expects(!_finished);
auto offset = finishSentRequestGetOffset(requestId);
if (result.type() == mtpc_upload_cdnFileReuploadNeeded) {
auto requestData = RequestData();
requestData.dcId = dcId();
requestData.dcIndex = 0;
requestData.offset = offset;
auto shiftedDcId = MTP::downloadDcId(requestData.dcId, requestData.dcIndex);
auto requestId = MTP::send(MTPupload_ReuploadCdnFile(MTP_bytes(_cdnToken), result.c_upload_cdnFileReuploadNeeded().vrequest_token), rpcDone(&mtpFileLoader::reuploadDone), rpcFail(&mtpFileLoader::cdnPartFailed), shiftedDcId);
placeSentRequest(requestId, requestData);
return;
}
Expects(result.type() == mtpc_upload_cdnFile);
auto key = bytes::make_span(_cdnEncryptionKey);
auto iv = bytes::make_span(_cdnEncryptionIV);
Expects(key.size() == MTP::CTRState::KeySize);
Expects(iv.size() == MTP::CTRState::IvecSize);
auto state = MTP::CTRState();
auto ivec = bytes::make_span(state.ivec);
std::copy(iv.begin(), iv.end(), ivec.begin());
auto counterOffset = static_cast<uint32>(offset) >> 4;
state.ivec[15] = static_cast<uchar>(counterOffset & 0xFF);
state.ivec[14] = static_cast<uchar>((counterOffset >> 8) & 0xFF);
state.ivec[13] = static_cast<uchar>((counterOffset >> 16) & 0xFF);
state.ivec[12] = static_cast<uchar>((counterOffset >> 24) & 0xFF);
auto decryptInPlace = result.c_upload_cdnFile().vbytes.v;
auto buffer = bytes::make_detached_span(decryptInPlace);
MTP::aesCtrEncrypt(buffer, key.data(), &state);
switch (checkCdnFileHash(offset, buffer)) {
case CheckCdnHashResult::NoHash: {
_cdnUncheckedParts.emplace(offset, decryptInPlace);
requestMoreCdnFileHashes();
} return;
case CheckCdnHashResult::Invalid: {
LOG(("API Error: Wrong cdnFileHash for offset %1.").arg(offset));
cancel(true);
} return;
case CheckCdnHashResult::Good: return partLoaded(offset, buffer);
}
Unexpected("Result of checkCdnFileHash()");
}
mtpFileLoader::CheckCdnHashResult mtpFileLoader::checkCdnFileHash(int offset, bytes::const_span buffer) {
auto cdnFileHashIt = _cdnFileHashes.find(offset);
if (cdnFileHashIt == _cdnFileHashes.cend()) {
return CheckCdnHashResult::NoHash;
}
auto realHash = openssl::Sha256(buffer);
if (bytes::compare(realHash, bytes::make_span(cdnFileHashIt->second.hash))) {
return CheckCdnHashResult::Invalid;
}
return CheckCdnHashResult::Good;
}
void mtpFileLoader::reuploadDone(const MTPVector<MTPFileHash> &result, mtpRequestId requestId) {
auto offset = finishSentRequestGetOffset(requestId);
addCdnHashes(result.v);
makeRequest(offset);
}
void mtpFileLoader::getCdnFileHashesDone(const MTPVector<MTPFileHash> &result, mtpRequestId requestId) {
Expects(!_finished);
Expects(_cdnHashesRequestId == requestId);
_cdnHashesRequestId = 0;
const auto offset = finishSentRequestGetOffset(requestId);
addCdnHashes(result.v);
auto someMoreChecked = false;
for (auto i = _cdnUncheckedParts.begin(); i != _cdnUncheckedParts.cend();) {
const auto uncheckedOffset = i->first;
const auto uncheckedBytes = bytes::make_span(i->second);
switch (checkCdnFileHash(uncheckedOffset, uncheckedBytes)) {
case CheckCdnHashResult::NoHash: {
++i;
} break;
case CheckCdnHashResult::Invalid: {
LOG(("API Error: Wrong cdnFileHash for offset %1.").arg(offset));
cancel(true);
return;
} break;
case CheckCdnHashResult::Good: {
someMoreChecked = true;
const auto goodOffset = uncheckedOffset;
const auto goodBytes = std::move(i->second);
const auto weak = QPointer<mtpFileLoader>(this);
i = _cdnUncheckedParts.erase(i);
if (!feedPart(goodOffset, bytes::make_span(goodBytes))
|| !weak) {
return;
} else if (_finished) {
notifyAboutProgress();
return;
}
} break;
default: Unexpected("Result of checkCdnFileHash()");
}
}
if (someMoreChecked) {
const auto weak = make_weak(this);
notifyAboutProgress();
if (weak) {
requestMoreCdnFileHashes();
}
return;
}
LOG(("API Error: Could not find cdnFileHash for offset %1 after getCdnFileHashes request.").arg(offset));
cancel(true);
}
void mtpFileLoader::placeSentRequest(mtpRequestId requestId, const RequestData &requestData) {
Expects(!_finished);
_downloader->requestedAmountIncrement(requestData.dcId, requestData.dcIndex, partSize());
++_queue->queriesCount;
_sentRequests.emplace(requestId, requestData);
}
int mtpFileLoader::finishSentRequestGetOffset(mtpRequestId requestId) {
auto it = _sentRequests.find(requestId);
Assert(it != _sentRequests.cend());
auto requestData = it->second;
_downloader->requestedAmountIncrement(requestData.dcId, requestData.dcIndex, -partSize());
--_queue->queriesCount;
_sentRequests.erase(it);
return requestData.offset;
}
bool mtpFileLoader::feedPart(int offset, bytes::const_span buffer) {
Expects(!_finished);
if (!buffer.empty()) {
if (_fileIsOpen) {
auto fsize = _file.size();
if (offset < fsize) {
_skippedBytes -= buffer.size();
} else if (offset > fsize) {
_skippedBytes += offset - fsize;
}
_file.seek(offset);
if (_file.write(reinterpret_cast<const char*>(buffer.data()), buffer.size()) != qint64(buffer.size())) {
cancel(true);
return false;
}
} else {
_data.reserve(offset + buffer.size());
if (offset > _data.size()) {
_skippedBytes += offset - _data.size();
_data.resize(offset);
}
if (offset == _data.size()) {
_data.append(reinterpret_cast<const char*>(buffer.data()), buffer.size());
} else {
_skippedBytes -= buffer.size();
if (int64(offset + buffer.size()) > _data.size()) {
_data.resize(offset + buffer.size());
}
const auto dst = bytes::make_detached_span(_data).subspan(
offset,
buffer.size());
bytes::copy(dst, buffer);
}
}
}
if (buffer.empty() || (buffer.size() % 1024)) { // bad next offset
_lastComplete = true;
}
if (_sentRequests.empty()
&& _cdnUncheckedParts.empty()
&& (_lastComplete || (_size && _nextRequestOffset >= _size))) {
if (!_filename.isEmpty() && (_toCache == LoadToCacheAsWell)) {
if (!_fileIsOpen) {
_fileIsOpen = _file.open(QIODevice::WriteOnly);
}
if (!_fileIsOpen || _file.write(_data) != qint64(_data.size())) {
cancel(true);
return false;
}
}
_finished = true;
if (_fileIsOpen) {
_file.close();
_fileIsOpen = false;
Platform::File::PostprocessDownloaded(QFileInfo(_file).absoluteFilePath());
}
removeFromQueue();
if (_localStatus == LocalStatus::NotFound) {
if (_locationType != UnknownFileLocation
&& !_filename.isEmpty()) {
Local::writeFileLocation(
mediaKey(_locationType, dcId(), objId()),
FileLocation(_filename));
}
if (_location.is<WebFileLocation>()
|| _locationType == UnknownFileLocation
|| _toCache == LoadToCacheAsWell) {
if (const auto key = cacheKey()) {
if (_data.size() <= Storage::kMaxFileInMemory) {
Auth().data().cache().put(
*key,
Storage::Cache::Database::TaggedValue(
base::duplicate(_data),
_cacheTag));
}
}
}
}
}
if (_finished) {
_downloader->taskFinished().notify();
}
return true;
}
void mtpFileLoader::partLoaded(int offset, bytes::const_span buffer) {
if (feedPart(offset, buffer)) {
notifyAboutProgress();
}
}
bool mtpFileLoader::normalPartFailed(
QByteArray fileReference,
const RPCError &error,
mtpRequestId requestId) {
if (MTP::isDefaultHandledError(error)) {
return false;
}
if (error.code() == 400
&& error.type().startsWith(qstr("FILE_REFERENCE_"))) {
Auth().api().refreshFileReference(
_origin,
this,
requestId,
fileReference);
return true;
}
return partFailed(error, requestId);
}
bool mtpFileLoader::partFailed(
const RPCError &error,
mtpRequestId requestId) {
if (MTP::isDefaultHandledError(error)) {
return false;
}
cancel(true);
return true;
}
bool mtpFileLoader::cdnPartFailed(
const RPCError &error,
mtpRequestId requestId) {
if (MTP::isDefaultHandledError(error)) {
return false;
}
if (requestId == _cdnHashesRequestId) {
_cdnHashesRequestId = 0;
}
if (error.type() == qstr("FILE_TOKEN_INVALID")
|| error.type() == qstr("REQUEST_TOKEN_INVALID")) {
auto offset = finishSentRequestGetOffset(requestId);
changeCDNParams(
offset,
0,
QByteArray(),
QByteArray(),
QByteArray(),
QVector<MTPFileHash>());
return true;
}
return partFailed(error, requestId);
}
void mtpFileLoader::cancelRequests() {
while (!_sentRequests.empty()) {
auto requestId = _sentRequests.begin()->first;
MTP::cancel(requestId);
finishSentRequestGetOffset(requestId);
}
}
void mtpFileLoader::switchToCDN(
int offset,
const MTPDupload_fileCdnRedirect &redirect) {
changeCDNParams(
offset,
redirect.vdc_id.v,
redirect.vfile_token.v,
redirect.vencryption_key.v,
redirect.vencryption_iv.v,
redirect.vfile_hashes.v);
}
void mtpFileLoader::addCdnHashes(const QVector<MTPFileHash> &hashes) {
for_const (auto &hash, hashes) {
Assert(hash.type() == mtpc_fileHash);
auto &data = hash.c_fileHash();
_cdnFileHashes.emplace(
data.voffset.v,
CdnFileHash { data.vlimit.v, data.vhash.v });
}
}
void mtpFileLoader::changeCDNParams(
int offset,
MTP::DcId dcId,
const QByteArray &token,
const QByteArray &encryptionKey,
const QByteArray &encryptionIV,
const QVector<MTPFileHash> &hashes) {
if (dcId != 0
&& (encryptionKey.size() != MTP::CTRState::KeySize
|| encryptionIV.size() != MTP::CTRState::IvecSize)) {
LOG(("Message Error: Wrong key (%1) / iv (%2) size in CDN params").arg(encryptionKey.size()).arg(encryptionIV.size()));
cancel(true);
return;
}
auto resendAllRequests = (_cdnDcId != dcId
|| _cdnToken != token
|| _cdnEncryptionKey != encryptionKey
|| _cdnEncryptionIV != encryptionIV);
_cdnDcId = dcId;
_cdnToken = token;
_cdnEncryptionKey = encryptionKey;
_cdnEncryptionIV = encryptionIV;
addCdnHashes(hashes);
if (resendAllRequests && !_sentRequests.empty()) {
auto resendOffsets = std::vector<int>();
resendOffsets.reserve(_sentRequests.size());
while (!_sentRequests.empty()) {
auto requestId = _sentRequests.begin()->first;
MTP::cancel(requestId);
auto resendOffset = finishSentRequestGetOffset(requestId);
resendOffsets.push_back(resendOffset);
}
for (auto resendOffset : resendOffsets) {
makeRequest(resendOffset);
}
}
makeRequest(offset);
}
std::optional<Storage::Cache::Key> mtpFileLoader::cacheKey() const {
return _location.match([&](const WebFileLocation &location) {
return std::make_optional(Data::WebDocumentCacheKey(location));
}, [&](const GeoPointLocation &location) {
return std::make_optional(Data::GeoPointCacheKey(location));
}, [&](const StorageFileLocation &location) {
return (_toCache == LoadToCacheAsWell)
? std::make_optional(location.cacheKey())
: std::nullopt;
});
}
mtpFileLoader::~mtpFileLoader() {
cancelRequests();
}
webFileLoader::webFileLoader(
const QString &url,
const QString &to,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag)
: FileLoader(
QString(),
0,
UnknownFileLocation,
LoadToCacheAsWell,
fromCloud,
autoLoading,
cacheTag)
, _url(url)
, _requestSent(false)
, _already(0) {
_queue = &_webQueue;
}
bool webFileLoader::loadPart() {
if (_finished || _requestSent || _webLoadManager == FinishedWebLoadManager) return false;
if (!_webLoadManager) {
_webLoadMainManager = new WebLoadMainManager();
_webLoadThread = new QThread();
_webLoadManager = new WebLoadManager(_webLoadThread);
_webLoadThread->start();
}
_requestSent = true;
_webLoadManager->append(this, _url);
return false;
}
int32 webFileLoader::currentOffset(bool includeSkipped) const {
return _already;
}
void webFileLoader::onProgress(qint64 already, qint64 size) {
_size = size;
_already = already;
emit progress(this);
}
void webFileLoader::onFinished(const QByteArray &data) {
if (_fileIsOpen) {
if (_file.write(data.constData(), data.size()) != qint64(data.size())) {
return cancel(true);
}
} else {
_data = data;
}
if (!_filename.isEmpty() && (_toCache == LoadToCacheAsWell)) {
if (!_fileIsOpen) _fileIsOpen = _file.open(QIODevice::WriteOnly);
if (!_fileIsOpen) {
return cancel(true);
}
if (_file.write(_data) != qint64(_data.size())) {
return cancel(true);
}
}
_finished = true;
if (_fileIsOpen) {
_file.close();
_fileIsOpen = false;
Platform::File::PostprocessDownloaded(QFileInfo(_file).absoluteFilePath());
}
removeFromQueue();
if (_localStatus == LocalStatus::NotFound) {
if (const auto key = cacheKey()) {
if (_data.size() <= Storage::kMaxFileInMemory) {
Auth().data().cache().put(
*key,
Storage::Cache::Database::TaggedValue(
base::duplicate(_data),
_cacheTag));
}
}
}
_downloader->taskFinished().notify();
notifyAboutProgress();
}
void webFileLoader::onError() {
cancel(true);
}
std::optional<Storage::Cache::Key> webFileLoader::cacheKey() const {
return Data::UrlCacheKey(_url);
}
void webFileLoader::cancelRequests() {
if (!webLoadManager()) return;
webLoadManager()->stop(this);
}
webFileLoader::~webFileLoader() {
}
class webFileLoaderPrivate {
public:
webFileLoaderPrivate(webFileLoader *loader, const QString &url)
: _interface(loader)
, _url(url)
, _redirectsLeft(kMaxHttpRedirects) {
}
QNetworkReply *reply() {
return _reply;
}
QNetworkReply *request(QNetworkAccessManager &manager, const QString &redirect) {
if (!redirect.isEmpty()) _url = redirect;
QNetworkRequest req(_url);
QByteArray rangeHeaderValue = "bytes=" + QByteArray::number(_already) + "-";
req.setRawHeader("Range", rangeHeaderValue);
_reply = manager.get(req);
return _reply;
}
bool oneMoreRedirect() {
if (_redirectsLeft) {
--_redirectsLeft;
return true;
}
return false;
}
void setData(const QByteArray &data) {
_data = data;
}
void addData(const QByteArray &data) {
_data.append(data);
}
const QByteArray &data() {
return _data;
}
void setProgress(qint64 already, qint64 size) {
_already = already;
_size = qMax(size, 0LL);
}
qint64 size() const {
return _size;
}
qint64 already() const {
return _already;
}
private:
static constexpr auto kMaxHttpRedirects = 5;
webFileLoader *_interface = nullptr;
QUrl _url;
qint64 _already = 0;
qint64 _size = 0;
QNetworkReply *_reply = nullptr;
int32 _redirectsLeft = kMaxHttpRedirects;
QByteArray _data;
friend class WebLoadManager;
};
void stopWebLoadManager() {
if (webLoadManager()) {
_webLoadThread->quit();
DEBUG_LOG(("Waiting for webloadThread to finish"));
_webLoadThread->wait();
delete _webLoadManager;
delete _webLoadMainManager;
delete _webLoadThread;
_webLoadThread = 0;
_webLoadMainManager = 0;
_webLoadManager = FinishedWebLoadManager;
}
}
WebLoadManager::WebLoadManager(QThread *thread) {
moveToThread(thread);
_manager.moveToThread(thread);
connect(thread, SIGNAL(started()), this, SLOT(process()));
connect(thread, SIGNAL(finished()), this, SLOT(finish()));
connect(this, SIGNAL(processDelayed()), this, SLOT(process()), Qt::QueuedConnection);
connect(this, SIGNAL(progress(webFileLoader*,qint64,qint64)), _webLoadMainManager, SLOT(progress(webFileLoader*,qint64,qint64)));
connect(this, SIGNAL(finished(webFileLoader*,QByteArray)), _webLoadMainManager, SLOT(finished(webFileLoader*,QByteArray)));
connect(this, SIGNAL(error(webFileLoader*)), _webLoadMainManager, SLOT(error(webFileLoader*)));
connect(&_manager, SIGNAL(authenticationRequired(QNetworkReply*,QAuthenticator*)), this, SLOT(onFailed(QNetworkReply*)));
#ifndef OS_MAC_OLD
connect(&_manager, SIGNAL(sslErrors(QNetworkReply*,const QList<QSslError>&)), this, SLOT(onFailed(QNetworkReply*)));
#endif // OS_MAC_OLD
}
void WebLoadManager::append(webFileLoader *loader, const QString &url) {
loader->_private = new webFileLoaderPrivate(loader, url);
QMutexLocker lock(&_loaderPointersMutex);
_loaderPointers.insert(loader, loader->_private);
emit processDelayed();
}
void WebLoadManager::stop(webFileLoader *loader) {
QMutexLocker lock(&_loaderPointersMutex);
_loaderPointers.remove(loader);
emit processDelayed();
}
bool WebLoadManager::carries(webFileLoader *loader) const {
QMutexLocker lock(&_loaderPointersMutex);
return _loaderPointers.contains(loader);
}
bool WebLoadManager::handleReplyResult(webFileLoaderPrivate *loader, WebReplyProcessResult result) {
QMutexLocker lock(&_loaderPointersMutex);
LoaderPointers::iterator it = _loaderPointers.find(loader->_interface);
if (it != _loaderPointers.cend() && it.key()->_private != loader) {
it = _loaderPointers.end(); // it is a new loader which was realloced in the same address
}
if (it == _loaderPointers.cend()) {
return false;
}
if (result == WebReplyProcessProgress) {
if (loader->size() > Storage::kMaxFileInMemory) {
LOG(("API Error: too large file is loaded to cache: %1").arg(loader->size()));
result = WebReplyProcessError;
}
}
if (result == WebReplyProcessError) {
if (it != _loaderPointers.cend()) {
emit error(it.key());
}
return false;
}
if (loader->already() < loader->size() || !loader->size()) {
emit progress(it.key(), loader->already(), loader->size());
return true;
}
emit finished(it.key(), loader->data());
return false;
}
void WebLoadManager::onFailed(QNetworkReply::NetworkError error) {
onFailed(qobject_cast<QNetworkReply*>(QObject::sender()));
}
void WebLoadManager::onFailed(QNetworkReply *reply) {
if (!reply) return;
reply->deleteLater();
Replies::iterator j = _replies.find(reply);
if (j == _replies.cend()) { // handled already
return;
}
webFileLoaderPrivate *loader = j.value();
_replies.erase(j);
LOG(("Network Error: Failed to request '%1', error %2 (%3)").arg(QString::fromLatin1(loader->_url.toEncoded())).arg(int(reply->error())).arg(reply->errorString()));
if (!handleReplyResult(loader, WebReplyProcessError)) {
_loaders.remove(loader);
delete loader;
}
}
void WebLoadManager::onProgress(qint64 already, qint64 size) {
const auto reply = qobject_cast<QNetworkReply*>(QObject::sender());
if (!reply) return;
const auto j = _replies.find(reply);
if (j == _replies.cend()) { // handled already
return;
}
const auto loader = j.value();
auto result = WebReplyProcessProgress;
const auto statusCode = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);
const auto status = statusCode.isValid() ? statusCode.toInt() : 200;
if (status != 200 && status != 206 && status != 416) {
if (status == 301 || status == 302) {
QString loc = reply->header(QNetworkRequest::LocationHeader).toString();
if (!loc.isEmpty()) {
if (loader->oneMoreRedirect()) {
sendRequest(loader, loc);
return;
} else {
LOG(("Network Error: Too many HTTP redirects in onFinished() for web file loader: %1").arg(loc));
result = WebReplyProcessError;
}
}
} else {
LOG(("Network Error: Bad HTTP status received in WebLoadManager::onProgress(): %1").arg(statusCode.toInt()));
result = WebReplyProcessError;
}
} else {
loader->setProgress(already, size);
QByteArray r = reply->readAll();
if (!r.isEmpty()) {
loader->addData(r);
}
if (size == 0) {
LOG(("Network Error: Zero size received for HTTP download progress in WebLoadManager::onProgress(): %1 / %2").arg(already).arg(size));
result = WebReplyProcessError;
}
}
if (!handleReplyResult(loader, result)) {
_replies.erase(j);
_loaders.remove(loader);
delete loader;
reply->abort();
reply->deleteLater();
}
}
void WebLoadManager::onMeta() {
const auto reply = qobject_cast<QNetworkReply*>(QObject::sender());
if (!reply) return;
const auto j = _replies.find(reply);
if (j == _replies.cend()) { // handled already
return;
}
const auto loader = j.value();
const auto pairs = reply->rawHeaderPairs();
for (auto i = pairs.begin(), e = pairs.end(); i != e; ++i) {
if (QString::fromUtf8(i->first).toLower() == "content-range") {
const auto m = QRegularExpression(qsl("/(\\d+)([^\\d]|$)")).match(QString::fromUtf8(i->second));
if (m.hasMatch()) {
loader->setProgress(qMax(qint64(loader->data().size()), loader->already()), m.captured(1).toLongLong());
if (!handleReplyResult(loader, WebReplyProcessProgress)) {
_replies.erase(j);
_loaders.remove(loader);
delete loader;
reply->abort();
reply->deleteLater();
}
}
}
}
}
void WebLoadManager::process() {
Loaders newLoaders;
{
QMutexLocker lock(&_loaderPointersMutex);
for (LoaderPointers::iterator i = _loaderPointers.begin(), e = _loaderPointers.end(); i != e; ++i) {
Loaders::iterator it = _loaders.find(i.value());
if (i.value()) {
if (it == _loaders.cend()) {
_loaders.insert(i.value());
newLoaders.insert(i.value());
}
i.value() = 0;
}
}
for (auto i = _loaders.begin(), e = _loaders.end(); i != e;) {
LoaderPointers::iterator it = _loaderPointers.find((*i)->_interface);
if (it != _loaderPointers.cend() && it.key()->_private != (*i)) {
it = _loaderPointers.end();
}
if (it == _loaderPointers.cend()) {
if (QNetworkReply *reply = (*i)->reply()) {
_replies.remove(reply);
reply->abort();
reply->deleteLater();
}
delete (*i);
i = _loaders.erase(i);
} else {
++i;
}
}
}
for_const (webFileLoaderPrivate *loader, newLoaders) {
if (_loaders.contains(loader)) {
sendRequest(loader);
}
}
}
void WebLoadManager::sendRequest(webFileLoaderPrivate *loader, const QString &redirect) {
Replies::iterator j = _replies.find(loader->reply());
if (j != _replies.cend()) {
QNetworkReply *r = j.key();
_replies.erase(j);
r->abort();
r->deleteLater();
}
QNetworkReply *r = loader->request(_manager, redirect);
// Those use QObject::sender, so don't just remove the receiver pointer!
connect(r, SIGNAL(downloadProgress(qint64, qint64)), this, SLOT(onProgress(qint64, qint64)));
connect(r, SIGNAL(error(QNetworkReply::NetworkError)), this, SLOT(onFailed(QNetworkReply::NetworkError)));
connect(r, SIGNAL(metaDataChanged()), this, SLOT(onMeta()));
_replies.insert(r, loader);
}
void WebLoadManager::finish() {
clear();
}
void WebLoadManager::clear() {
QMutexLocker lock(&_loaderPointersMutex);
for (LoaderPointers::iterator i = _loaderPointers.begin(), e = _loaderPointers.end(); i != e; ++i) {
if (i.value()) {
i.key()->_private = 0;
}
}
_loaderPointers.clear();
for_const (webFileLoaderPrivate *loader, _loaders) {
delete loader;
}
_loaders.clear();
for (Replies::iterator i = _replies.begin(), e = _replies.end(); i != e; ++i) {
delete i.key();
}
_replies.clear();
}
WebLoadManager::~WebLoadManager() {
clear();
}
void WebLoadMainManager::progress(webFileLoader *loader, qint64 already, qint64 size) {
if (webLoadManager() && webLoadManager()->carries(loader)) {
loader->onProgress(already, size);
}
}
void WebLoadMainManager::finished(webFileLoader *loader, QByteArray data) {
if (webLoadManager() && webLoadManager()->carries(loader)) {
loader->onFinished(data);
}
}
void WebLoadMainManager::error(webFileLoader *loader) {
if (webLoadManager() && webLoadManager()->carries(loader)) {
loader->onError();
}
}