tdlight/td/telegram/files/FileGenerateManager.cpp

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//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
//
// 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/files/FileGenerateManager.h"
#include "td/telegram/td_api.h"
#include "td/telegram/telegram_api.h"
#include "td/telegram/files/FileId.h"
#include "td/telegram/files/FileLoaderUtils.h"
#include "td/telegram/files/FileManager.h"
#include "td/telegram/files/FileType.h"
#include "td/telegram/Global.h"
#include "td/telegram/net/NetQuery.h"
#include "td/telegram/net/NetQueryDispatcher.h"
#include "td/telegram/Td.h"
#include "td/utils/common.h"
#include "td/utils/format.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/Parser.h"
#include "td/utils/port/FileFd.h"
#include "td/utils/port/path.h"
#include "td/utils/port/Stat.h"
#include "td/utils/Slice.h"
#include "td/utils/SliceBuilder.h"
#include <cmath>
#include <memory>
#include <utility>
namespace td {
class FileGenerateActor : public Actor {
public:
virtual void file_generate_write_part(int32 offset, string data, Promise<> promise) {
LOG(ERROR) << "Receive unexpected file_generate_write_part";
}
virtual void file_generate_progress(int32 expected_size, int32 local_prefix_size, Promise<> promise) = 0;
virtual void file_generate_finish(Status status, Promise<> promise) = 0;
};
class FileDownloadGenerateActor final : public FileGenerateActor {
public:
FileDownloadGenerateActor(FileType file_type, FileId file_id, unique_ptr<FileGenerateCallback> callback,
ActorShared<> parent)
: file_type_(file_type), file_id_(file_id), callback_(std::move(callback)), parent_(std::move(parent)) {
}
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void file_generate_progress(int32 expected_size, int32 local_prefix_size, Promise<> promise) final {
UNREACHABLE();
}
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void file_generate_finish(Status status, Promise<> promise) final {
UNREACHABLE();
}
private:
FileType file_type_;
FileId file_id_;
unique_ptr<FileGenerateCallback> callback_;
ActorShared<> parent_;
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void start_up() final {
LOG(INFO) << "Generate by downloading " << file_id_;
class Callback final : public FileManager::DownloadCallback {
public:
explicit Callback(ActorId<FileDownloadGenerateActor> parent) : parent_(std::move(parent)) {
}
// TODO: upload during download
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void on_download_ok(FileId file_id) final {
send_closure(parent_, &FileDownloadGenerateActor::on_download_ok);
}
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void on_download_error(FileId file_id, Status error) final {
send_closure(parent_, &FileDownloadGenerateActor::on_download_error, std::move(error));
}
private:
ActorId<FileDownloadGenerateActor> parent_;
};
send_closure(G()->file_manager(), &FileManager::download, file_id_, std::make_shared<Callback>(actor_id(this)), 1,
-1, -1);
}
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void hangup() final {
send_closure(G()->file_manager(), &FileManager::download, file_id_, nullptr, 0, -1, -1);
stop();
}
void on_download_ok() {
send_lambda(G()->file_manager(),
[file_type = file_type_, file_id = file_id_, callback = std::move(callback_)]() mutable {
auto file_view = G()->td().get_actor_unsafe()->file_manager_->get_file_view(file_id);
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CHECK(!file_view.empty());
if (file_view.has_local_location()) {
auto location = file_view.local_location();
location.file_type_ = file_type;
callback->on_ok(location);
} else {
LOG(ERROR) << "Expected to have local location";
callback->on_error(Status::Error(500, "Unknown"));
}
});
stop();
}
void on_download_error(Status error) {
callback_->on_error(std::move(error));
stop();
}
};
class MapDownloadGenerateActor final : public FileGenerateActor {
public:
MapDownloadGenerateActor(string conversion, unique_ptr<FileGenerateCallback> callback, ActorShared<> parent)
: conversion_(std::move(conversion)), callback_(std::move(callback)), parent_(std::move(parent)) {
}
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void file_generate_progress(int32 expected_size, int32 local_prefix_size, Promise<> promise) final {
UNREACHABLE();
}
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void file_generate_finish(Status status, Promise<> promise) final {
UNREACHABLE();
}
private:
string conversion_;
unique_ptr<FileGenerateCallback> callback_;
ActorShared<> parent_;
string file_name_;
class Callback final : public NetQueryCallback {
ActorId<MapDownloadGenerateActor> parent_;
public:
explicit Callback(ActorId<MapDownloadGenerateActor> parent) : parent_(parent) {
}
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void on_result(NetQueryPtr query) final {
send_closure(parent_, &MapDownloadGenerateActor::on_result, std::move(query));
}
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void hangup_shared() final {
send_closure(parent_, &MapDownloadGenerateActor::hangup_shared);
}
};
ActorOwn<NetQueryCallback> net_callback_;
Result<tl_object_ptr<telegram_api::inputWebFileGeoPointLocation>> parse_conversion() {
auto parts = full_split(Slice(conversion_), '#');
if (parts.size() != 9 || !parts[0].empty() || parts[1] != "map" || !parts[8].empty()) {
return Status::Error("Wrong conversion");
}
TRY_RESULT(zoom, to_integer_safe<int32>(parts[2]));
TRY_RESULT(x, to_integer_safe<int32>(parts[3]));
TRY_RESULT(y, to_integer_safe<int32>(parts[4]));
TRY_RESULT(width, to_integer_safe<int32>(parts[5]));
TRY_RESULT(height, to_integer_safe<int32>(parts[6]));
TRY_RESULT(scale, to_integer_safe<int32>(parts[7]));
if (zoom < 13 || zoom > 20) {
return Status::Error("Wrong zoom");
}
auto size = 256 * (1 << zoom);
if (x < 0 || x >= size) {
return Status::Error("Wrong x");
}
if (y < 0 || y >= size) {
return Status::Error("Wrong y");
}
if (width < 16 || height < 16 || width > 1024 || height > 1024) {
return Status::Error("Wrong dimensions");
}
if (scale < 1 || scale > 3) {
return Status::Error("Wrong scale");
}
file_name_ = PSTRING() << "map_" << zoom << "_" << x << "_" << y << ".png";
const double PI = 3.14159265358979323846;
double longitude = (x + 0.1) * 360.0 / size - 180;
double latitude = 90 - 360 * std::atan(std::exp(((y + 0.1) / size - 0.5) * 2 * PI)) / PI;
int64 access_hash = G()->get_location_access_hash(latitude, longitude);
return make_tl_object<telegram_api::inputWebFileGeoPointLocation>(
make_tl_object<telegram_api::inputGeoPoint>(0, latitude, longitude, 0), access_hash, width, height, zoom,
scale);
}
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void start_up() final {
auto r_input_web_file = parse_conversion();
if (r_input_web_file.is_error()) {
LOG(ERROR) << "Can't parse " << conversion_ << ": " << r_input_web_file.error();
return on_error(r_input_web_file.move_as_error());
}
net_callback_ = create_actor<Callback>("MapDownloadGenerateCallback", actor_id(this));
LOG(INFO) << "Download " << conversion_;
auto query =
G()->net_query_creator().create(telegram_api::upload_getWebFile(r_input_web_file.move_as_ok(), 0, 1 << 20),
G()->get_webfile_dc_id(), NetQuery::Type::DownloadSmall);
G()->net_query_dispatcher().dispatch_with_callback(std::move(query), {net_callback_.get(), 0});
}
void on_result(NetQueryPtr query) {
auto r_result = process_result(std::move(query));
if (r_result.is_error()) {
return on_error(r_result.move_as_error());
}
callback_->on_ok(r_result.ok());
stop();
}
Result<FullLocalFileLocation> process_result(NetQueryPtr query) {
TRY_RESULT(web_file, fetch_result<telegram_api::upload_getWebFile>(std::move(query)));
if (static_cast<size_t>(web_file->size_) != web_file->bytes_.size()) {
LOG(ERROR) << "Failed to download map of size " << web_file->size_;
return Status::Error("File is too big");
}
return save_file_bytes(FileType::Thumbnail, std::move(web_file->bytes_), file_name_);
}
void on_error(Status error) {
callback_->on_error(std::move(error));
stop();
}
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void hangup_shared() final {
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on_error(Status::Error(1, "Canceled"));
}
};
class FileExternalGenerateActor final : public FileGenerateActor {
public:
FileExternalGenerateActor(uint64 query_id, const FullGenerateFileLocation &generate_location,
const LocalFileLocation &local_location, string name,
unique_ptr<FileGenerateCallback> callback, ActorShared<> parent)
: query_id_(query_id)
, generate_location_(generate_location)
, local_(local_location)
, name_(std::move(name))
, callback_(std::move(callback))
, parent_(std::move(parent)) {
}
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void file_generate_write_part(int32 offset, string data, Promise<> promise) final {
check_status(do_file_generate_write_part(offset, data), std::move(promise));
}
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void file_generate_progress(int32 expected_size, int32 local_prefix_size, Promise<> promise) final {
check_status(do_file_generate_progress(expected_size, local_prefix_size), std::move(promise));
}
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void file_generate_finish(Status status, Promise<> promise) final {
if (status.is_error()) {
check_status(std::move(status));
return promise.set_value(Unit());
}
check_status(do_file_generate_finish(), std::move(promise));
}
private:
uint64 query_id_;
FullGenerateFileLocation generate_location_;
LocalFileLocation local_;
string name_;
string path_;
unique_ptr<FileGenerateCallback> callback_;
ActorShared<> parent_;
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void start_up() final {
if (local_.type() == LocalFileLocation::Type::Full) {
callback_->on_ok(local_.full());
callback_.reset();
return stop();
}
if (local_.type() == LocalFileLocation::Type::Partial) {
const auto &partial = local_.partial();
path_ = partial.path_;
LOG(INFO) << "Unlink partially generated file at " << path_;
unlink(path_).ignore();
} else {
auto r_file_path = open_temp_file(generate_location_.file_type_);
if (r_file_path.is_error()) {
return check_status(r_file_path.move_as_error());
}
auto file_path = r_file_path.move_as_ok();
file_path.first.close();
path_ = file_path.second;
}
send_closure(
G()->td(), &Td::send_update,
make_tl_object<td_api::updateFileGenerationStart>(
static_cast<int64>(query_id_), generate_location_.original_path_, path_, generate_location_.conversion_));
}
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void hangup() final {
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check_status(Status::Error(1, "Canceled"));
}
Status do_file_generate_write_part(int32 offset, const string &data) {
if (offset < 0) {
return Status::Error("Wrong offset specified");
}
auto size = data.size();
TRY_RESULT(fd, FileFd::open(path_, FileFd::Create | FileFd::Write));
TRY_RESULT(written, fd.pwrite(data, offset));
if (written != size) {
return Status::Error(PSLICE() << "Failed to write file: written " << written << " bytes instead of " << size);
}
return Status::OK();
}
Status do_file_generate_progress(int32 expected_size, int32 local_prefix_size) {
if (local_prefix_size < 0) {
return Status::Error(1, "Invalid local prefix size");
}
callback_->on_partial_generate(PartialLocalFileLocation{generate_location_.file_type_, local_prefix_size, path_, "",
Bitmask(Bitmask::Ones{}, 1).encode()},
expected_size);
return Status::OK();
}
Status do_file_generate_finish() {
auto dir = get_files_dir(generate_location_.file_type_);
TRY_RESULT(perm_path, create_from_temp(path_, dir, name_));
callback_->on_ok(FullLocalFileLocation(generate_location_.file_type_, std::move(perm_path), 0));
callback_.reset();
stop();
return Status::OK();
}
void check_status(Status status, Promise<> promise = Promise<>()) {
if (promise) {
if (status.is_ok() || status.code() == 1) {
promise.set_value(Unit());
} else {
promise.set_error(Status::Error(400, status.message()));
}
}
if (status.is_error()) {
LOG(INFO) << "Unlink partially generated file at " << path_ << " because of " << status;
unlink(path_).ignore();
callback_->on_error(std::move(status));
callback_.reset();
stop();
}
}
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void tear_down() final {
send_closure(G()->td(), &Td::send_update,
make_tl_object<td_api::updateFileGenerationStop>(static_cast<int64>(query_id_)));
}
};
FileGenerateManager::Query::~Query() = default;
FileGenerateManager::Query::Query(Query &&other) noexcept = default;
FileGenerateManager::Query &FileGenerateManager::Query::operator=(Query &&other) noexcept = default;
static Status check_mtime(std::string &conversion, CSlice original_path) {
if (original_path.empty()) {
return Status::OK();
}
ConstParser parser(conversion);
if (!parser.try_skip("#mtime#")) {
return Status::OK();
}
auto mtime_str = parser.read_till('#');
parser.skip('#');
while (mtime_str.size() >= 2 && mtime_str[0] == '0') {
mtime_str.remove_prefix(1);
}
auto r_mtime = to_integer_safe<uint64>(mtime_str);
if (parser.status().is_error() || r_mtime.is_error()) {
return Status::OK();
}
auto expected_mtime = r_mtime.move_as_ok();
conversion = parser.read_all().str();
auto r_stat = stat(original_path);
uint64 actual_mtime = r_stat.is_ok() ? r_stat.ok().mtime_nsec_ : 0;
if (FileManager::are_modification_times_equal(expected_mtime, actual_mtime)) {
LOG(DEBUG) << "File \"" << original_path << "\" modification time " << actual_mtime << " matches";
return Status::OK();
}
return Status::Error(PSLICE() << "FILE_GENERATE_LOCATION_INVALID: File \"" << original_path
<< "\" was modified: " << tag("expected modification time", expected_mtime)
<< tag("actual modification time", actual_mtime));
}
void FileGenerateManager::generate_file(uint64 query_id, FullGenerateFileLocation generate_location,
const LocalFileLocation &local_location, string name,
unique_ptr<FileGenerateCallback> callback) {
LOG(INFO) << "Begin to generate file with " << generate_location;
auto mtime_status = check_mtime(generate_location.conversion_, generate_location.original_path_);
if (mtime_status.is_error()) {
return callback->on_error(std::move(mtime_status));
}
CHECK(query_id != 0);
auto it_flag = query_id_to_query_.emplace(query_id, Query{});
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LOG_CHECK(it_flag.second) << "Query identifier must be unique";
auto parent = actor_shared(this, query_id);
Slice file_id_query = "#file_id#";
Slice conversion = generate_location.conversion_;
auto &query = it_flag.first->second;
if (begins_with(conversion, file_id_query)) {
auto file_id = FileId(to_integer<int32>(conversion.substr(file_id_query.size())), 0);
query.worker_ = create_actor<FileDownloadGenerateActor>("FileDownloadGenerateActor", generate_location.file_type_,
file_id, std::move(callback), std::move(parent));
} else if (begins_with(conversion, "#map#") && generate_location.original_path_.empty()) {
query.worker_ = create_actor<MapDownloadGenerateActor>(
"MapDownloadGenerateActor", std::move(generate_location.conversion_), std::move(callback), std::move(parent));
} else {
query.worker_ = create_actor<FileExternalGenerateActor>("FileExternalGenerationActor", query_id, generate_location,
local_location, std::move(name), std::move(callback),
std::move(parent));
}
}
void FileGenerateManager::cancel(uint64 query_id) {
auto it = query_id_to_query_.find(query_id);
if (it == query_id_to_query_.end()) {
return;
}
it->second.worker_.reset();
}
void FileGenerateManager::external_file_generate_write_part(uint64 query_id, int32 offset, string data,
Promise<> promise) {
auto it = query_id_to_query_.find(query_id);
if (it == query_id_to_query_.end()) {
return promise.set_error(Status::Error(400, "Unknown generation_id"));
}
send_closure(it->second.worker_, &FileGenerateActor::file_generate_write_part, offset, std::move(data),
std::move(promise));
}
void FileGenerateManager::external_file_generate_progress(uint64 query_id, int32 expected_size, int32 local_prefix_size,
Promise<> promise) {
auto it = query_id_to_query_.find(query_id);
if (it == query_id_to_query_.end()) {
return promise.set_error(Status::Error(400, "Unknown generation_id"));
}
send_closure(it->second.worker_, &FileGenerateActor::file_generate_progress, expected_size, local_prefix_size,
std::move(promise));
}
void FileGenerateManager::external_file_generate_finish(uint64 query_id, Status status, Promise<> promise) {
auto it = query_id_to_query_.find(query_id);
if (it == query_id_to_query_.end()) {
return promise.set_error(Status::Error(400, "Unknown generation_id"));
}
send_closure(it->second.worker_, &FileGenerateActor::file_generate_finish, std::move(status), std::move(promise));
}
void FileGenerateManager::do_cancel(uint64 query_id) {
query_id_to_query_.erase(query_id);
}
void FileGenerateManager::hangup_shared() {
do_cancel(get_link_token());
loop();
}
void FileGenerateManager::hangup() {
close_flag_ = true;
for (auto &it : query_id_to_query_) {
it.second.worker_.reset();
}
loop();
}
void FileGenerateManager::loop() {
if (close_flag_ && query_id_to_query_.empty()) {
stop();
}
}
} // namespace td