143 lines
4.1 KiB
C++
143 lines
4.1 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#include "td/telegram/files/FileHashUploader.h"
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#include "td/telegram/telegram_api.h"
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#include "td/telegram/Global.h"
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#include "td/telegram/net/NetQueryDispatcher.h"
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#include "td/utils/buffer.h"
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#include "td/utils/crypto.h"
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#include "td/utils/logging.h"
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#include "td/utils/MimeType.h"
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#include "td/utils/misc.h"
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#include "td/utils/PathView.h"
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#include "td/utils/port/Fd.h"
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#include "td/utils/port/FileFd.h"
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#include "td/utils/Status.h"
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namespace td {
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void FileHashUploader::start_up() {
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auto status = init();
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if (status.is_error()) {
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callback_->on_error(std::move(status));
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stop_flag_ = true;
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return;
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}
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}
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Status FileHashUploader::init() {
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TRY_RESULT(fd, FileFd::open(local_.path_, FileFd::Read));
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if (fd.get_size() != size_) {
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return Status::Error("size mismatch");
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}
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fd_ = BufferedFd<FileFd>(std::move(fd));
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sha256_init(&sha256_state_);
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resource_state_.set_unit_size(1024);
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resource_state_.update_estimated_limit(size_);
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return Status::OK();
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}
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void FileHashUploader::loop() {
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if (stop_flag_) {
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return;
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}
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auto status = loop_impl();
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if (status.is_error()) {
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callback_->on_error(std::move(status));
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stop_flag_ = true;
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return;
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}
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}
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Status FileHashUploader::loop_impl() {
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if (state_ == CalcSha) {
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TRY_STATUS(loop_sha());
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}
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if (state_ == NetRequest) {
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// messages.getDocumentByHash#338e2464 sha256:bytes size:int mime_type:string = Document;
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auto hash = BufferSlice(32);
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sha256_final(&sha256_state_, hash.as_slice());
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auto mime_type = MimeType::from_extension(PathView(local_.path_).extension(), "image/gif");
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auto query =
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telegram_api::messages_getDocumentByHash(std::move(hash), static_cast<int32>(size_), std::move(mime_type));
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LOG(INFO) << "Send getDocumentByHash request: " << to_string(query);
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auto ptr = G()->net_query_creator().create(create_storer(query));
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G()->net_query_dispatcher().dispatch_with_callback(std::move(ptr), actor_shared(this));
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state_ = WaitNetResult;
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}
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return Status::OK();
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}
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Status FileHashUploader::loop_sha() {
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auto limit = resource_state_.unused();
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if (limit == 0) {
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return Status::OK();
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}
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if (limit > size_left_) {
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limit = size_left_;
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}
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resource_state_.start_use(limit);
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fd_.update_flags(Fd::Flag::Read);
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TRY_RESULT(read_size, fd_.flush_read(static_cast<size_t>(limit)));
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if (read_size != static_cast<size_t>(limit)) {
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return Status::Error("unexpected end of file");
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}
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while (true) {
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auto ready = fd_.input_buffer().prepare_read();
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if (ready.empty()) {
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break;
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}
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sha256_update(ready, &sha256_state_);
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fd_.input_buffer().confirm_read(ready.size());
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}
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resource_state_.stop_use(limit);
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size_left_ -= narrow_cast<int64>(read_size);
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CHECK(size_left_ >= 0);
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if (size_left_ == 0) {
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state_ = NetRequest;
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return Status::OK();
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}
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return Status::OK();
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}
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void FileHashUploader::on_result(NetQueryPtr net_query) {
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auto status = on_result_impl(std::move(net_query));
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if (status.is_error()) {
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callback_->on_error(std::move(status));
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stop_flag_ = true;
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return;
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}
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}
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Status FileHashUploader::on_result_impl(NetQueryPtr net_query) {
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if (net_query->is_error()) {
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return net_query->move_as_error();
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}
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TRY_RESULT(res, fetch_result<telegram_api::messages_getDocumentByHash>(net_query->ok()));
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switch (res->get_id()) {
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case telegram_api::documentEmpty::ID:
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return Status::Error("Document is not found by hash");
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case telegram_api::document::ID: {
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auto document = move_tl_object_as<telegram_api::document>(res);
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callback_->on_ok(FullRemoteFileLocation(FileType::Document, document->id_, document->access_hash_,
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DcId::internal(document->dc_id_)));
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stop_flag_ = true;
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return Status::OK();
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}
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default:
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UNREACHABLE();
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return Status::Error("UNREACHABLE");
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}
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}
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} // namespace td
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