tdesktop/Telegram/SourceFiles/storage/file_download_mtproto.cpp

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/*
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_mtproto.h"
#include "data/data_document.h"
#include "data/data_file_origin.h"
#include "storage/cache/storage_cache_types.h"
#include "main/main_session.h"
#include "apiwrap.h"
#include "mtproto/mtp_instance.h"
#include "mtproto/mtproto_config.h"
#include "mtproto/mtproto_auth_key.h"
mtpFileLoader::mtpFileLoader(
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not_null<Main::Session*> session,
const StorageFileLocation &location,
Data::FileOrigin origin,
LocationType type,
const QString &to,
int loadSize,
int fullSize,
LoadToCacheSetting toCache,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag)
: FileLoader(
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session,
to,
loadSize,
fullSize,
type,
toCache,
fromCloud,
autoLoading,
cacheTag)
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, DownloadMtprotoTask(&session->downloader(), location, origin) {
}
mtpFileLoader::mtpFileLoader(
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not_null<Main::Session*> session,
const WebFileLocation &location,
int loadSize,
int fullSize,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag)
: FileLoader(
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session,
QString(),
loadSize,
fullSize,
UnknownFileLocation,
LoadToCacheAsWell,
fromCloud,
autoLoading,
cacheTag)
, DownloadMtprotoTask(
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&session->downloader(),
session->serverConfig().webFileDcId,
{ location }) {
}
mtpFileLoader::mtpFileLoader(
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not_null<Main::Session*> session,
const GeoPointLocation &location,
int loadSize,
int fullSize,
LoadFromCloudSetting fromCloud,
bool autoLoading,
uint8 cacheTag)
: FileLoader(
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session,
QString(),
loadSize,
fullSize,
UnknownFileLocation,
LoadToCacheAsWell,
fromCloud,
autoLoading,
cacheTag)
, DownloadMtprotoTask(
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&session->downloader(),
session->serverConfig().webFileDcId,
{ location }) {
}
mtpFileLoader::~mtpFileLoader() {
if (!_finished) {
cancel();
}
}
Data::FileOrigin mtpFileLoader::fileOrigin() const {
return DownloadMtprotoTask::fileOrigin();
}
uint64 mtpFileLoader::objId() const {
return DownloadMtprotoTask::objectId();
}
bool mtpFileLoader::readyToRequest() const {
return !_finished
&& !_lastComplete
&& (_fullSize != 0 || !haveSentRequests())
&& (!_fullSize || _nextRequestOffset < _loadSize);
}
int mtpFileLoader::takeNextRequestOffset() {
Expects(readyToRequest());
const auto result = _nextRequestOffset;
_nextRequestOffset += Storage::kDownloadPartSize;
return result;
}
bool mtpFileLoader::feedPart(int offset, const QByteArray &bytes) {
const auto buffer = bytes::make_span(bytes);
if (!writeResultPart(offset, buffer)) {
return false;
}
if (buffer.empty() || (buffer.size() % 1024)) { // bad next offset
_lastComplete = true;
}
const auto finished = !haveSentRequests()
&& (_lastComplete || (_fullSize && _nextRequestOffset >= _loadSize));
if (finished) {
removeFromQueue();
if (!finalizeResult()) {
return false;
}
} else {
notifyAboutProgress();
}
return true;
}
void mtpFileLoader::cancelOnFail() {
cancel(true);
}
bool mtpFileLoader::setWebFileSizeHook(int size) {
if (!_fullSize || _fullSize == size) {
_fullSize = _loadSize = size;
return true;
}
LOG(("MTP Error: "
"Bad size provided by bot for webDocument: %1, real: %2"
).arg(_fullSize
).arg(size));
cancel(true);
return false;
}
void mtpFileLoader::startLoading() {
addToQueue();
}
void mtpFileLoader::startLoadingWithPartial(const QByteArray &data) {
Expects(data.startsWith("partial:"));
constexpr auto kPrefix = 8;
const auto parts = (data.size() - kPrefix) / Storage::kDownloadPartSize;
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const auto use = parts * Storage::kDownloadPartSize;
if (use > 0) {
_nextRequestOffset = use;
feedPart(0, QByteArray::fromRawData(data.data() + kPrefix, use));
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}
startLoading();
}
void mtpFileLoader::cancelHook() {
cancelAllRequests();
}
Storage::Cache::Key mtpFileLoader::cacheKey() const {
return v::match(location().data, [&](const WebFileLocation &location) {
return Data::WebDocumentCacheKey(location);
}, [&](const GeoPointLocation &location) {
return Data::GeoPointCacheKey(location);
}, [&](const StorageFileLocation &location) {
return location.cacheKey();
});
}
std::optional<MediaKey> mtpFileLoader::fileLocationKey() const {
if (_locationType != UnknownFileLocation) {
return mediaKey(_locationType, dcId(), objId());
}
return std::nullopt;
}