tdlight-team/tdlight
tdlight-team/tdlight
1
1
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
4acfae167f
tdlight/td/telegram/DownloadManager.cpp

632 lines
21 KiB
C++
Raw Blame History

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/telegram/DownloadManager.h"
#include "td/telegram/FileReferenceManager.h"
#include "td/telegram/files/FileId.hpp"
#include "td/telegram/files/FileSourceId.hpp"
#include "td/telegram/Global.h"
#include "td/telegram/logevent/LogEvent.h"
#include "td/telegram/TdDb.h"
#include "td/actor/MultiPromise.h"
#include "td/utils/algorithm.h"
#include "td/utils/FlatHashMap.h"
#include "td/utils/Hints.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/Slice.h"
#include "td/utils/SliceBuilder.h"
#include "td/utils/tl_helpers.h"
#include <algorithm>
#include <functional>
#include <limits>
namespace td {
struct FileDownloadInDb {
int64 download_id{};
FileId file_id;
FileSourceId file_source_id;
int32 priority{};
int32 created_at{};
int32 completed_at{};
bool is_paused{};
template <class StorerT>
void store(StorerT &storer) const {
BEGIN_STORE_FLAGS();
STORE_FLAG(is_paused);
END_STORE_FLAGS();
td::store(download_id, storer);
td::store(file_id, storer);
td::store(file_source_id, storer);
td::store(priority, storer);
td::store(created_at, storer);
td::store(completed_at, storer);
}
template <class ParserT>
void parse(ParserT &parser) {
BEGIN_PARSE_FLAGS();
PARSE_FLAG(is_paused);
END_PARSE_FLAGS();
td::parse(download_id, parser);
td::parse(file_id, parser);
td::parse(file_source_id, parser);
td::parse(priority, parser);
td::parse(created_at, parser);
td::parse(completed_at, parser);
}
};
class DownloadManagerImpl final : public DownloadManager {
public:
explicit DownloadManagerImpl(unique_ptr<Callback> callback) : callback_(std::move(callback)) {
}
void start_up() final {
try_start();
}
Status toggle_is_paused(FileId file_id, bool is_paused) final {
TRY_STATUS(check_is_active());
TRY_RESULT(file_info_ptr, get_file_info(file_id));
toggle_is_paused(*file_info_ptr, is_paused);
return Status::OK();
}
Status toggle_all_is_paused(bool is_paused) final {
TRY_STATUS(check_is_active());
for (auto &it : files_) {
toggle_is_paused(*it.second, is_paused);
}
return Status::OK();
}
Status remove_file(FileId file_id, FileSourceId file_source_id, bool delete_from_cache) final {
TRY_STATUS(check_is_active());
TRY_RESULT(file_info_ptr, get_file_info(file_id, file_source_id));
auto &file_info = *file_info_ptr;
if (!file_info.is_paused) {
callback_->pause_file(file_info.internal_file_id);
}
unregister_file_info(file_info);
if (delete_from_cache) {
callback_->delete_file(file_info.internal_file_id);
}
by_internal_file_id_.erase(file_info.internal_file_id);
by_file_id_.erase(file_info.file_id);
hints_.remove(file_info.download_id);
remove_from_db(file_info);
files_.erase(file_info.download_id);
callback_->update_file_removed(file_id);
return Status::OK();
}
Status change_search_text(FileId file_id, FileSourceId file_source_id, string search_text) final {
TRY_STATUS(check_is_active());
TRY_RESULT(file_info_ptr, get_file_info(file_id, file_source_id));
auto &file_info = *file_info_ptr;
hints_.add(file_info.download_id, search_text.empty() ? string(" ") : search_text);
return Status::OK();
}
Status remove_all_files(bool only_active, bool only_completed, bool delete_from_cache) final {
TRY_STATUS(check_is_active());
vector<FileId> to_remove;
for (auto &it : files_) {
FileInfo &file_info = *it.second;
if (only_active && is_completed(file_info)) {
continue;
}
if (only_completed && !is_completed(file_info)) {
continue;
}
to_remove.push_back(file_info.file_id);
}
for (auto file_id : to_remove) {
remove_file(file_id, {}, delete_from_cache);
}
return Status::OK();
}
Status add_file(FileId file_id, FileSourceId file_source_id, string search_text, int8 priority) final {
TRY_STATUS(check_is_active());
remove_file(file_id, {}, false);
auto download_id = next_download_id();
auto file_info = make_unique<FileInfo>();
file_info->download_id = download_id;
file_info->file_id = file_id;
file_info->file_source_id = file_source_id;
file_info->is_paused = false;
file_info->priority = priority;
file_info->created_at = G()->unix_time();
file_info->need_save_to_db = true;
add_file_info(std::move(file_info), search_text);
return Status::OK();
}
void hints_synchronized(Result<Unit>) {
if (G()->close_flag()) {
return;
}
LOG(INFO) << "DownloadManager: hints are synchronized";
is_search_inited_ = true;
}
void search(string query, bool only_active, bool only_completed, string offset, int32 limit,
Promise<td_api::object_ptr<td_api::foundFileDownloads>> promise) final {
clear_counters();
return do_search(std::move(query), only_active, only_completed, std::move(offset), limit, std::move(promise),
Unit{});
}
void do_search(string query, bool only_active, bool only_completed, string offset, int32 limit,
Promise<td_api::object_ptr<td_api::foundFileDownloads>> promise, Result<Unit>) {
TRY_STATUS_PROMISE(promise, G()->close_status());
TRY_STATUS_PROMISE(promise, check_is_active());
if (!is_search_inited_) {
Promise<Unit> lock;
if (load_search_text_multipromise_.promise_count() == 0) {
load_search_text_multipromise_.add_promise(
promise_send_closure(actor_id(this), &DownloadManagerImpl::hints_synchronized));
load_search_text_multipromise_.set_ignore_errors(true);
lock = load_search_text_multipromise_.get_promise();
prepare_hints();
}
load_search_text_multipromise_.add_promise(promise_send_closure(actor_id(this), &DownloadManagerImpl::do_search,
std::move(query), only_active, only_completed,
std::move(offset), limit, std::move(promise)));
lock.set_value(Unit());
return;
}
if (limit <= 0) {
return promise.set_error(Status::Error(400, "Limit must be positive"));
}
int64 offset_int64 = std::numeric_limits<int64>::max();
if (!offset.empty()) {
auto r_offset = to_integer_safe<int64>(offset);
if (r_offset.is_error()) {
return promise.set_error(Status::Error(400, "Invalid offset"));
}
offset_int64 = r_offset.move_as_ok();
}
auto ids = hints_.search(query, 10000, true).second;
int32 total_count = 0;
td::remove_if(ids, [&](auto download_id) {
auto r = get_file_info(download_id);
CHECK(r.is_ok());
auto &file_info = *r.ok();
if (only_active && is_completed(file_info)) {
return true;
}
if (only_completed && !is_completed(file_info)) {
return true;
}
total_count++;
if (download_id >= offset_int64) {
return true;
}
return false;
});
std::sort(ids.begin(), ids.end(), std::greater<>());
if (total_count > limit) {
ids.resize(limit);
}
auto file_downloads = transform(ids, [&](auto id) {
auto it = files_.find(id);
CHECK(it != files_.end());
const FileInfo &file_info = *it->second;
return callback_->get_file_download_object(file_info.file_id, file_info.file_source_id, file_info.created_at,
file_info.completed_at, file_info.is_paused);
});
td::remove_if(file_downloads, [](const auto &file_download) { return file_download->message_ == nullptr; });
string next_offset;
if (!ids.empty()) {
next_offset = to_string(ids.back());
}
promise.set_value(
td_api::make_object<td_api::foundFileDownloads>(total_count, std::move(file_downloads), next_offset));
}
void update_file_download_state(FileId internal_file_id, int64 download_size, int64 size, int64 expected_size,
bool is_paused) final {
LOG(INFO) << "Update file download state for file " << internal_file_id << " of size " << size << '/'
<< expected_size << " to download_size = " << download_size << " and is_paused = " << is_paused;
if (!callback_) {
return;
}
auto r_file_info_ptr = get_file_info_by_internal(internal_file_id);
if (r_file_info_ptr.is_error()) {
return;
}
auto &file_info = *r_file_info_ptr.ok();
if (file_info.link_token != get_link_token()) {
LOG(INFO) << "Ignore update_file_download_state because of outdated link_token";
return;
}
with_file_info(file_info, [&](FileInfo &file_info) {
file_info.size = size;
file_info.expected_size = expected_size;
file_info.downloaded_size = download_size;
if (is_paused && file_info.is_paused != is_paused) {
file_info.is_paused = is_paused;
file_info.need_save_to_db = true;
}
});
}
void update_file_deleted(FileId internal_file_id) final {
if (!callback_) {
return;
}
auto r_file_info_ptr = get_file_info_by_internal(internal_file_id);
if (r_file_info_ptr.is_error()) {
return;
}
auto &file_info = *r_file_info_ptr.ok();
remove_file(file_info.file_id, {}, false);
}
private:
unique_ptr<Callback> callback_;
struct FileInfo {
int64 download_id{};
FileId file_id;
FileId internal_file_id;
FileSourceId file_source_id;
int8 priority;
bool is_paused{};
bool is_counted{};
mutable bool need_save_to_db{};
int64 size{};
int64 expected_size{};
int64 downloaded_size{};
int32 created_at{};
int32 completed_at{};
uint64 link_token{};
};
FlatHashMap<FileId, int64, FileIdHash> by_file_id_;
FlatHashMap<FileId, int64, FileIdHash> by_internal_file_id_;
FlatHashMap<int64, unique_ptr<FileInfo>> files_;
Hints hints_;
Counters counters_;
Counters sent_counters_;
bool is_started_{false};
bool is_search_inited_{false};
int64 max_download_id_{0};
uint64 last_link_token_{0};
MultiPromiseActor load_search_text_multipromise_{"LoadFileSearchTextMultiPromiseActor"};
int64 next_download_id() {
return ++max_download_id_;
}
static bool is_completed(const FileInfo &file_info) {
return file_info.completed_at != 0;
}
static bool get_file_size(const FileInfo &file_info) {
return file_info.size == 0 ? max(file_info.downloaded_size + 1, file_info.expected_size) : file_info.size;
}
static string pmc_key(const FileInfo &file_info) {
return PSTRING() << "dlds#" << file_info.download_id;
}
void sync_with_db(const FileInfo &file_info) {
if (!file_info.need_save_to_db) {
return;
}
file_info.need_save_to_db = false;
LOG(INFO) << "Saving to download database file " << file_info.file_id << '/' << file_info.internal_file_id
<< " with is_paused = " << file_info.is_paused;
FileDownloadInDb to_save;
to_save.download_id = file_info.download_id;
to_save.file_source_id = file_info.file_source_id;
to_save.is_paused = file_info.is_paused;
to_save.priority = file_info.priority;
to_save.created_at = file_info.created_at;
to_save.completed_at = file_info.completed_at;
to_save.file_id = file_info.file_id;
G()->td_db()->get_binlog_pmc()->set(pmc_key(file_info), log_event_store(to_save).as_slice().str());
}
static void remove_from_db(const FileInfo &file_info) {
G()->td_db()->get_binlog_pmc()->erase(pmc_key(file_info));
}
void try_start() {
if (is_started_) {
return;
}
auto serialized_counter = G()->td_db()->get_binlog_pmc()->get("dlds_counter");
if (!serialized_counter.empty()) {
log_event_parse(sent_counters_, serialized_counter).ensure();
if (sent_counters_.downloaded_size == sent_counters_.total_size || sent_counters_.total_size == 0) {
G()->td_db()->get_binlog_pmc()->erase("dlds_counter");
sent_counters_ = Counters();
} else {
callback_->update_counters(sent_counters_);
}
}
auto downloads_in_kv = G()->td_db()->get_binlog_pmc()->prefix_get("dlds#");
for (auto &it : downloads_in_kv) {
Slice key = it.first;
Slice value = it.second;
FileDownloadInDb in_db;
log_event_parse(in_db, value).ensure();
CHECK(in_db.download_id == to_integer_safe<int64>(key).ok());
max_download_id_ = max(in_db.download_id, max_download_id_);
add_file_from_db(in_db);
}
is_started_ = true;
update_counters();
}
void add_file_from_db(FileDownloadInDb in_db) {
if (by_file_id_.count(in_db.file_id) != 0) {
// file has already been added
return;
}
if (in_db.completed_at > 0) {
// TODO file must not be added if it isn't fully downloaded
}
auto file_info = make_unique<FileInfo>();
file_info->download_id = in_db.download_id;
file_info->file_id = in_db.file_id;
file_info->file_source_id = in_db.file_source_id;
file_info->is_paused = in_db.is_paused;
file_info->priority = narrow_cast<int8>(in_db.priority);
file_info->completed_at = in_db.completed_at;
file_info->created_at = in_db.created_at;
add_file_info(std::move(file_info), "");
}
void prepare_hints() {
for (auto &it : files_) {
const auto &file_info = *it.second;
send_closure(G()->file_reference_manager(), &FileReferenceManager::get_file_search_text, file_info.file_source_id,
callback_->get_file_view(file_info.file_id).get_unique_file_id(),
[self = actor_id(this), promise = load_search_text_multipromise_.get_promise(),
download_id = it.first](Result<string> r_search_text) mutable {
send_closure(self, &DownloadManagerImpl::add_download_to_hints, download_id,
std::move(r_search_text), std::move(promise));
});
}
}
void add_download_to_hints(int64 download_id, Result<string> r_search_text, Promise<Unit> promise) {
auto it = files_.find(download_id);
if (it == files_.end()) {
return promise.set_value(Unit());
}
if (r_search_text.is_error()) {
if (!G()->close_flag()) {
remove_file(it->second->file_id, {}, false);
}
} else {
auto search_text = r_search_text.move_as_ok();
// TODO: This is a race. Synchronous call to MessagesManager would be better.
hints_.add(download_id, search_text.empty() ? string(" ") : search_text);
}
promise.set_value(Unit());
}
void add_file_info(unique_ptr<FileInfo> &&file_info, const string &search_text) {
CHECK(file_info != nullptr);
auto download_id = file_info->download_id;
file_info->internal_file_id = callback_->dup_file_id(file_info->file_id);
auto file_view = callback_->get_file_view(file_info->file_id);
CHECK(!file_view.empty());
file_info->size = file_view.size();
file_info->expected_size = file_view.expected_size();
file_info->downloaded_size = file_view.local_total_size();
file_info->is_counted = !is_completed(*file_info);
by_internal_file_id_[file_info->internal_file_id] = download_id;
by_file_id_[file_info->file_id] = download_id;
hints_.add(download_id, search_text.empty() ? string(" ") : search_text);
file_info->link_token = ++last_link_token_;
LOG(INFO) << "Adding to downloads file " << file_info->file_id << '/' << file_info->internal_file_id
<< " with is_paused = " << file_info->is_paused;
auto it = files_.emplace(download_id, std::move(file_info)).first;
register_file_info(*it->second);
if (!is_completed(*it->second) && !it->second->is_paused) {
callback_->start_file(it->second->internal_file_id, it->second->priority,
actor_shared(this, it->second->link_token));
}
}
void loop() final {
if (!callback_) {
return;
}
try_start();
}
void timeout_expired() final {
clear_counters();
}
void clear_counters() {
CHECK(counters_ == sent_counters_);
if (counters_.downloaded_size != counters_.total_size || counters_.total_size == 0) {
return;
}
for (auto &it : files_) {
with_file_info(*it.second, [&](auto &file_info) {
if (!file_info.is_paused) {
file_info.is_counted = false;
}
});
}
counters_ = Counters();
update_counters();
}
void tear_down() final {
callback_.reset();
}
void toggle_is_paused(const FileInfo &file_info, bool is_paused) {
if (is_completed(file_info) || is_paused == file_info.is_paused) {
return;
}
LOG(INFO) << "Change is_paused state of file " << file_info.file_id << " to " << is_paused;
with_file_info(file_info, [&](auto &file_info) {
file_info.is_paused = is_paused;
file_info.need_save_to_db = true;
file_info.link_token = ++last_link_token_;
});
if (is_paused) {
callback_->pause_file(file_info.internal_file_id);
} else {
callback_->start_file(file_info.internal_file_id, file_info.priority, actor_shared(this, file_info.link_token));
}
}
void update_counters() {
if (!is_started_) {
return;
}
if (counters_ == sent_counters_) {
return;
}
CHECK(counters_.total_size >= 0);
CHECK(counters_.total_count >= 0);
CHECK(counters_.downloaded_size >= 0);
if (counters_.downloaded_size == counters_.total_size && counters_.total_size != 0) {
set_timeout_in(60.0);
}
sent_counters_ = counters_;
callback_->update_counters(counters_);
}
Result<const FileInfo *> get_file_info(FileId file_id, FileSourceId file_source_id = {}) {
auto it = by_file_id_.find(file_id);
if (it == by_file_id_.end()) {
return Status::Error(400, "Can't find file");
}
return get_file_info(it->second, file_source_id);
}
Result<const FileInfo *> get_file_info_by_internal(FileId file_id) {
auto it = by_internal_file_id_.find(file_id);
if (it == by_internal_file_id_.end()) {
return Status::Error(400, "Can't find file");
}
return get_file_info(it->second);
}
Result<const FileInfo *> get_file_info(int64 download_id, FileSourceId file_source_id = {}) {
auto it = files_.find(download_id);
if (it == files_.end()) {
return Status::Error(400, "Can't find file");
}
if (file_source_id.is_valid() && file_source_id != it->second->file_source_id) {
return Status::Error(400, "Can't find file with such source");
}
return it->second.get();
}
void unregister_file_info(const FileInfo &file_info) {
if (file_info.is_counted && !file_info.is_paused) {
counters_.downloaded_size -= file_info.downloaded_size;
counters_.total_size -= get_file_size(file_info);
counters_.total_count--;
}
}
void register_file_info(FileInfo &file_info) {
if (file_info.is_counted && !file_info.is_paused) {
counters_.downloaded_size += file_info.downloaded_size;
counters_.total_size += get_file_size(file_info);
counters_.total_count++;
}
if (!is_completed(file_info) && file_info.size != 0 && file_info.downloaded_size == file_info.size) {
file_info.is_paused = false;
file_info.completed_at = G()->unix_time();
file_info.need_save_to_db = true;
}
sync_with_db(file_info);
update_counters();
}
template <class F>
void with_file_info(const FileInfo &const_file_info, F &&f) {
unregister_file_info(const_file_info);
auto &file_info = const_cast<FileInfo &>(const_file_info);
f(file_info);
register_file_info(file_info);
}
Status check_is_active() const {
if (!callback_) {
LOG(ERROR) << "DownloadManager wasn't initialized";
return Status::Error(500, "DownloadManager isn't initialized");
}
CHECK(is_started_);
return Status::OK();
}
};
unique_ptr<DownloadManager> DownloadManager::create(unique_ptr<Callback> callback) {
return make_unique<DownloadManagerImpl>(std::move(callback));
}
td_api::object_ptr<td_api::updateFileDownloads> DownloadManager::Counters::get_update_file_downloads_object() const {
return td_api::make_object<td_api::updateFileDownloads>(total_size, total_count, downloaded_size);
}
template <class StorerT>
void DownloadManager::Counters::store(StorerT &storer) const {
BEGIN_STORE_FLAGS();
END_STORE_FLAGS();
td::store(total_size, storer);
td::store(total_count, storer);
td::store(downloaded_size, storer);
}
template <class ParserT>
void DownloadManager::Counters::parse(ParserT &parser) {
BEGIN_PARSE_FLAGS();
END_PARSE_FLAGS();
td::parse(total_size, parser);
td::parse(total_count, parser);
td::parse(downloaded_size, parser);
}
} // namespace td
Reference in New Issue View Git Blame Copy Permalink