104 lines
3.5 KiB
C++
104 lines
3.5 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2021
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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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#pragma once
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#include "td/telegram/files/FileEncryptionKey.h"
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#include "td/telegram/files/FileLoader.h"
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#include "td/telegram/files/FileLocation.h"
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#include "td/telegram/net/DcId.h"
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#include "td/telegram/net/NetQuery.h"
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#include "td/telegram/telegram_api.h"
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#include "td/utils/common.h"
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#include "td/utils/port/FileFd.h"
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#include "td/utils/Status.h"
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#include <map>
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#include <set>
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#include <utility>
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namespace td {
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class FileDownloader final : public FileLoader {
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public:
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class Callback : public FileLoader::Callback {
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public:
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virtual void on_start_download() = 0;
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virtual void on_partial_download(PartialLocalFileLocation partial_local, int64 ready_size, int64 size) = 0;
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virtual void on_ok(FullLocalFileLocation full_local, int64 size, bool is_new) = 0;
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virtual void on_error(Status status) = 0;
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};
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FileDownloader(const FullRemoteFileLocation &remote, const LocalFileLocation &local, int64 size, string name,
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const FileEncryptionKey &encryption_key, bool is_small, bool search_file, int64 offset, int64 limit,
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unique_ptr<Callback> callback);
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// Should just implement all parent pure virtual methods.
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// Must not call any of them...
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private:
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enum class QueryType : uint8 { Default = 1, CDN, ReuploadCDN };
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ResourceState resource_state_;
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FullRemoteFileLocation remote_;
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LocalFileLocation local_;
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int64 size_;
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string name_;
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FileEncryptionKey encryption_key_;
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unique_ptr<Callback> callback_;
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bool only_check_{false};
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string path_;
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FileFd fd_;
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int32 next_part_ = 0;
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bool next_part_stop_ = false;
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bool is_small_;
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bool search_file_{false};
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int64 offset_;
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int64 limit_;
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bool use_cdn_ = false;
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DcId cdn_dc_id_;
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string cdn_encryption_key_;
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string cdn_encryption_iv_;
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string cdn_file_token_;
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int32 cdn_file_token_generation_{0};
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std::map<int32, string> cdn_part_reupload_token_;
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std::map<int32, int32> cdn_part_file_token_generation_;
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bool need_check_{false};
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struct HashInfo {
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int64 offset;
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size_t size;
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string hash;
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bool operator<(const HashInfo &other) const {
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return offset < other.offset;
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}
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};
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std::set<HashInfo> hash_info_;
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bool has_hash_query_ = false;
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Result<FileInfo> init() final TD_WARN_UNUSED_RESULT;
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Status on_ok(int64 size) final TD_WARN_UNUSED_RESULT;
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void on_error(Status status) final;
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Result<bool> should_restart_part(Part part, NetQueryPtr &net_query) final TD_WARN_UNUSED_RESULT;
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Result<std::pair<NetQueryPtr, bool>> start_part(Part part, int32 part_count,
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int64 streaming_offset) final TD_WARN_UNUSED_RESULT;
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Result<size_t> process_part(Part part, NetQueryPtr net_query) final TD_WARN_UNUSED_RESULT;
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void on_progress(Progress progress) final;
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FileLoader::Callback *get_callback() final;
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Status process_check_query(NetQueryPtr net_query) final;
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Result<CheckInfo> check_loop(int64 checked_prefix_size, int64 ready_prefix_size, bool is_ready) final;
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void add_hash_info(const std::vector<telegram_api::object_ptr<telegram_api::fileHash>> &hashes);
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bool keep_fd_ = false;
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void keep_fd_flag(bool keep_fd) final;
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void try_release_fd();
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Status acquire_fd() TD_WARN_UNUSED_RESULT;
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Status check_net_query(NetQueryPtr &net_query);
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};
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} // namespace td
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