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#include "map/cloud.hpp"
#include "coding/file_reader.hpp"
#include "coding/file_writer.hpp"
#include "coding/internal/file_data.hpp"
#include "coding/sha1.hpp"
#include "platform/network_policy.hpp"
#include "platform/http_client.hpp"
#include "platform/platform.hpp"
#include "platform/preferred_languages.hpp"
#include "platform/remote_file.hpp"
#include "platform/settings.hpp"
#include "platform/http_uploader.hpp"
#include "base/assert.hpp"
#include "base/file_name_utils.hpp"
#include "base/logging.hpp"
#include "base/stl_helpers.hpp"
#include <algorithm>
#include <chrono>
#include <sstream>
#include "3party/Alohalytics/src/alohalytics.h"
#include "private.h"
using namespace std::chrono;
namespace
{
uint32_t constexpr kTaskTimeoutInSeconds = 1;
uint64_t constexpr kUpdateTimeoutInHours = 24;
uint32_t constexpr kRetryMaxAttempts = 3;
uint32_t constexpr kRetryTimeoutInSeconds = 5;
uint32_t constexpr kRetryDegradationFactor = 2;
uint64_t constexpr kMaxWwanUploadingSizeInBytes = 10 * 1024; // 10Kb
uint64_t constexpr kMaxUploadingFileSizeInBytes = 100 * 1024 * 1024; // 100Mb
uint32_t constexpr kRequestTimeoutInSec = 5;
std::string const kServerUrl = CLOUD_URL;
std::string const kServerVersion = "v1";
std::string const kServerCreateSnapshotMethod = "snapshot/create";
std::string const kServerFinishSnapshotMethod = "snapshot/finish";
std::string const kServerBestSnapshotMethod = "snapshot/best";
std::string const kServerUploadMethod = "file/upload/start";
std::string const kServerNotifyMethod = "file/upload/finish";
std::string const kServerDownloadMethod = "file/download";
std::string const kApplicationJson = "application/json";
std::string const kSnapshotFile = "snapshot.json";
std::string GetIndexFilePath(std::string const & indexName)
{
return base::JoinPath(GetPlatform().SettingsDir(), indexName);
}
std::string GetRestoringFolder(std::string const & serverPathName)
{
return base::JoinPath(GetPlatform().TmpDir(), serverPathName + "_restore");
}
std::string BuildMethodUrl(std::string const & serverPathName, std::string const & methodName)
{
if (kServerUrl.empty())
return {};
std::ostringstream ss;
ss << kServerUrl << "/"
<< kServerVersion << "/"
<< serverPathName << "/"
<< methodName << "/";
return ss.str();
}
std::string BuildAuthenticationToken(std::string const & accessToken)
{
return "Bearer " + accessToken;
}
std::string ExtractFileNameWithoutExtension(std::string const & filePath)
{
std::string path = filePath;
base::GetNameFromFullPath(path);
base::GetNameWithoutExt(path);
return path;
}
template<typename DataType>
std::string SerializeToJson(DataType const & data)
{
std::string jsonStr;
using Sink = MemWriter<std::string>;
Sink sink(jsonStr);
coding::SerializerJson<Sink> serializer(sink);
serializer(data);
return jsonStr;
}
template<typename DataType>
void DeserializeFromJson(std::string const & jsonStr, DataType & result)
{
coding::DeserializerJson des(jsonStr);
des(result);
}
bool IsSuccessfulResultCode(int resultCode)
{
return resultCode >= 200 && resultCode < 300;
}
std::string GetDeviceName()
{
return GetPlatform().DeviceName() + " (" + GetPlatform().DeviceModel() + ")";
}
bool CanUpload(uint64_t totalUploadingSize)
{
auto const status = GetPlatform().ConnectionStatus();
switch (status)
{
case Platform::EConnectionType::CONNECTION_NONE: return false;
case Platform::EConnectionType::CONNECTION_WIFI: return true;
case Platform::EConnectionType::CONNECTION_WWAN:
return platform::GetCurrentNetworkPolicy().CanUse() &&
totalUploadingSize <= kMaxWwanUploadingSizeInBytes;
}
UNREACHABLE();
}
struct SnapshotCreateRequestData
{
std::string m_deviceId;
std::string m_deviceName;
std::vector<std::string> m_fileNames;
explicit SnapshotCreateRequestData(std::vector<std::string> const & files = {})
: m_deviceId(GetPlatform().UniqueClientId()), m_deviceName(GetDeviceName()), m_fileNames(files)
{}
DECLARE_VISITOR(visitor(m_deviceId, "device_id"), visitor(m_deviceName, "device_name"),
visitor(m_fileNames, "file_names"))
};
struct SnapshotRequestData
{
std::string m_deviceId;
SnapshotRequestData() : m_deviceId(GetPlatform().UniqueClientId()) {}
DECLARE_VISITOR(visitor(m_deviceId, "device_id"))
};
struct UploadingRequestData
{
std::string m_deviceId;
std::string m_fileName;
std::string m_locale;
explicit UploadingRequestData(std::string const & filePath = {})
: m_deviceId(GetPlatform().UniqueClientId())
, m_fileName(ExtractFileNameWithoutExtension(filePath))
, m_locale(languages::GetCurrentOrig())
{}
DECLARE_VISITOR(visitor(m_deviceId, "device_id"), visitor(m_fileName, "file_name"),
visitor(m_locale, "locale"))
};
struct NotifyRequestData
{
std::string m_deviceId;
std::string m_fileName;
uint64_t m_fileSize = 0;
NotifyRequestData(std::string const & filePath, uint64_t fileSize)
: m_deviceId(GetPlatform().UniqueClientId())
, m_fileName(ExtractFileNameWithoutExtension(filePath))
, m_fileSize(fileSize)
{}
DECLARE_VISITOR(visitor(m_deviceId, "device_id"), visitor(m_fileName, "file_name"),
visitor(m_fileSize, "file_size"))
};
struct DownloadingRequestData
{
std::string m_deviceId;
std::string m_fileName;
uint64_t m_datetime = 0;
DownloadingRequestData(std::string const & deviceId, std::string const & fileName,
uint64_t datetime)
: m_deviceId(deviceId), m_fileName(fileName), m_datetime(datetime)
{}
DECLARE_VISITOR(visitor(m_deviceId, "device_id"), visitor(m_fileName, "file_name"),
visitor(m_datetime, "datetime"))
};
struct DownloadingResponseData
{
std::string m_url;
std::string m_fallbackUrl;
DECLARE_VISITOR(visitor(m_url, "url"), visitor(m_fallbackUrl, "fallback_url"))
};
struct DownloadingResult
{
Cloud::RequestResult m_requestResult;
bool m_isMalformed = false;
DownloadingResponseData m_response;
};
using ResponseHandler = std::function<Cloud::RequestResult(
int code, std::string const & response)>;
template <typename RequestDataType, typename... RequestDataArgs>
Cloud::RequestResult CloudRequestWithResult(std::string const & url,
std::string const & accessToken,
ResponseHandler const & responseHandler,
RequestDataArgs const & ... args)
{
ASSERT(responseHandler != nullptr, ());
platform::HttpClient request(url);
request.SetTimeout(kRequestTimeoutInSec);
request.SetRawHeader("Accept", kApplicationJson);
request.SetRawHeader("Authorization", BuildAuthenticationToken(accessToken));
request.SetRawHeader("User-Agent", GetPlatform().GetAppUserAgent());
request.SetBodyData(SerializeToJson(RequestDataType(args...)), kApplicationJson);
if (request.RunHttpRequest() && !request.WasRedirected())
{
int const resultCode = request.ErrorCode();
if (resultCode == 403)
{
LOG(LWARNING, ("Access denied for", url));
return {Cloud::RequestStatus::Forbidden, request.ServerResponse()};
}
return responseHandler(resultCode, request.ServerResponse());
}
return {Cloud::RequestStatus::NetworkError, request.ServerResponse()};
}
template <typename RequestDataType, typename... RequestDataArgs>
Cloud::RequestResult CloudRequest(std::string const & url, std::string const & accessToken,
RequestDataArgs const &... args)
{
auto responseHandler = [](int code, std::string const & serverResponse) -> Cloud::RequestResult {
if (IsSuccessfulResultCode(code))
return {Cloud::RequestStatus::Ok, {}};
return {Cloud::RequestStatus::NetworkError, serverResponse};
};
return CloudRequestWithResult<RequestDataType>(url, accessToken, responseHandler, args...);
}
template <typename ResultType>
void ParseRequestJsonResult(std::string const & url, std::string const & serverResponse,
ResultType & result)
{
try
{
DeserializeFromJson(serverResponse, result.m_response);
}
catch (base::Json::Exception const & exception)
{
LOG(LWARNING, ("Malformed server response", "url:", url, "response:", serverResponse));
result.m_response = {};
result.m_isMalformed = true;
}
}
template <typename RequestDataType, typename ResultType, typename... RequestDataArgs>
ResultType CloudRequestWithJsonResult(std::string const & url, std::string const & accessToken,
RequestDataArgs const &... args)
{
ResultType result;
auto responseHandler = [&result, &url](int code,
std::string const & serverResponse) -> Cloud::RequestResult
{
if (IsSuccessfulResultCode(code))
{
ParseRequestJsonResult(url, serverResponse, result);
return {Cloud::RequestStatus::Ok, {}};
}
return {Cloud::RequestStatus::NetworkError, serverResponse};
};
result.m_requestResult =
CloudRequestWithResult<RequestDataType>(url, accessToken, responseHandler, args...);
return result;
}
Cloud::SnapshotResponseData ReadSnapshotFile(std::string const & filename)
{
if (!GetPlatform().IsFileExistsByFullPath(filename))
return {};
std::string jsonStr;
try
{
FileReader r(filename);
r.ReadAsString(jsonStr);
}
catch (FileReader::Exception const & exception)
{
LOG(LWARNING, ("Exception while reading file:", filename,
"reason:", exception.what()));
return {};
}
if (jsonStr.empty())
return {};
try
{
Cloud::SnapshotResponseData data;
DeserializeFromJson(jsonStr, data);
return data;
}
catch (base::Json::Exception const & exception)
{
LOG(LWARNING, ("Exception while parsing file:", filename,
"reason:", exception.what(), "json:", jsonStr));
}
return {};
}
bool CheckAndGetFileSize(std::string const & filePath, uint64_t & fileSize)
{
if (!base::GetFileSize(filePath, fileSize))
return false;
// We do not work with files which size is more than kMaxUploadingFileSizeInBytes.
return fileSize <= kMaxUploadingFileSizeInBytes;
}
} // namespace
Cloud::Cloud(CloudParams && params)
: m_params(std::move(params))
{
ASSERT(!m_params.m_indexName.empty(), ());
ASSERT(!m_params.m_serverPathName.empty(), ());
ASSERT(!m_params.m_settingsParamName.empty(), ());
ASSERT(!m_params.m_restoredFileExtension.empty(), ());
ASSERT(!m_params.m_restoringFolder.empty(), ());
m_state = GetCloudState(m_params.m_settingsParamName);
GetPlatform().RunTask(Platform::Thread::File, [this]() { ReadIndex(); });
}
Cloud::~Cloud()
{
std::lock_guard<std::mutex> lock(m_mutex);
SaveIndexImpl();
}
void Cloud::SetInvalidTokenHandler(InvalidTokenHandler && onInvalidToken)
{
std::lock_guard<std::mutex> lock(m_mutex);
m_onInvalidToken = std::move(onInvalidToken);
}
void Cloud::SetSynchronizationHandlers(SynchronizationStartedHandler && onSynchronizationStarted,
SynchronizationFinishedHandler && onSynchronizationFinished,
RestoreRequestedHandler && onRestoreRequested,
RestoredFilesPreparedHandler && onRestoredFilesPrepared)
{
std::lock_guard<std::mutex> lock(m_mutex);
m_onSynchronizationStarted = std::move(onSynchronizationStarted);
m_onSynchronizationFinished = std::move(onSynchronizationFinished);
m_onRestoreRequested = std::move(onRestoreRequested);
m_onRestoredFilesPrepared = std::move(onRestoredFilesPrepared);
}
void Cloud::SetState(State state)
{
std::lock_guard<std::mutex> lock(m_mutex);
if (m_state == state)
return;
m_state = state;
settings::Set(m_params.m_settingsParamName, static_cast<int>(m_state));
switch (m_state)
{
case State::Enabled:
GetPlatform().RunTask(Platform::Thread::File, [this]() { LoadIndex(); });
break;
case State::Disabled:
// Delete index file and clear memory.
base::DeleteFileX(GetIndexFilePath(m_params.m_indexName));
m_index = Index();
break;
case State::Unknown: ASSERT(false, ("Unknown state can't be set up")); break;
}
}
Cloud::State Cloud::GetState() const
{
std::lock_guard<std::mutex> lock(m_mutex);
return m_state;
}
void Cloud::Init(std::vector<std::string> const & filePaths)
{
std::lock_guard<std::mutex> lock(m_mutex);
for (auto const & filePath : filePaths)
m_files[ExtractFileNameWithoutExtension(filePath)] = filePath;
if (m_state != State::Enabled)
return;
GetPlatform().RunTask(Platform::Thread::File, [this]() { LoadIndex(); });
}
uint64_t Cloud::GetLastSynchronizationTimestampInMs() const
{
std::lock_guard<std::mutex> lock(m_mutex);
if (m_state != State::Enabled)
return 0;
return m_index.m_lastSyncTimestamp * 1000; // in milliseconds.
}
std::unique_ptr<User::Subscriber> Cloud::GetUserSubscriber()
{
auto s = std::make_unique<User::Subscriber>();
s->m_onChangeToken = [this](std::string const & token)
{
SetAccessToken(token);
ScheduleUploading();
};
return s;
}
void Cloud::LoadIndex()
{
UpdateIndex(ReadIndex());
ScheduleUploading();
}
bool Cloud::ReadIndex()
{
auto const indexFilePath = GetIndexFilePath(m_params.m_indexName);
if (!GetPlatform().IsFileExistsByFullPath(indexFilePath))
return false;
// Read index file.
std::string jsonStr;
try
{
FileReader r(indexFilePath);
r.ReadAsString(jsonStr);
}
catch (FileReader::Exception const & exception)
{
LOG(LWARNING, ("Exception while reading file:", indexFilePath,
"reason:", exception.what()));
return false;
}
// Parse index file.
if (jsonStr.empty())
return false;
try
{
Index index;
DeserializeFromJson(jsonStr, index);
std::lock_guard<std::mutex> lock(m_mutex);
std::swap(m_index, index);
}
catch (base::Json::Exception const & exception)
{
LOG(LWARNING, ("Exception while parsing file:", indexFilePath,
"reason:", exception.what(), "json:", jsonStr));
return false;
}
return true;
}
void Cloud::UpdateIndex(bool indexExists)
{
std::lock_guard<std::mutex> lock(m_mutex);
// Now we process files ONLY if update time is out.
auto const h = static_cast<uint64_t>(
duration_cast<hours>(system_clock::now().time_since_epoch()).count());
if (!indexExists || h >= m_index.m_lastUpdateInHours + kUpdateTimeoutInHours)
{
for (auto const & path : m_files)
MarkModifiedImpl(path.second, true /* isOutdated */);
// Erase disappeared files from index.
base::EraseIf(m_index.m_entries, [this](EntryPtr const & entity) {
return m_files.find(entity->m_name) == m_files.end();
});
// Index is outdated only if there is an entry.
m_index.m_isOutdated = !m_index.m_entries.empty();
if (m_index.m_isOutdated)
m_index.m_lastUpdateInHours = h;
SaveIndexImpl();
}
m_indexUpdated = true;
}
uint64_t Cloud::CalculateUploadingSizeImpl() const
{
uint64_t sz = 0;
for (auto const & entry : m_index.m_entries)
sz += entry->m_sizeInBytes;
return sz;
}
bool Cloud::CanUploadImpl() const
{
return m_state == State::Enabled && m_index.CanBeUploaded() && !m_accessToken.empty() &&
!m_uploadingStarted && m_indexUpdated && m_restoringState == RestoringState::None &&
CanUpload(CalculateUploadingSizeImpl());
}
void Cloud::SortEntriesBeforeUploadingImpl()
{
std::sort(m_index.m_entries.begin(), m_index.m_entries.end(),
[](EntryPtr const & lhs, EntryPtr const & rhs)
{
return lhs->m_sizeInBytes < rhs->m_sizeInBytes;
});
}
void Cloud::MarkModifiedImpl(std::string const & filePath, bool isOutdated)
{
uint64_t fileSize = 0;
if (!CheckAndGetFileSize(filePath, fileSize))
return;
auto const fileName = ExtractFileNameWithoutExtension(filePath);
auto entryPtr = GetEntryImpl(fileName);
if (entryPtr)
{
entryPtr->m_isOutdated = isOutdated;
entryPtr->m_sizeInBytes = fileSize;
}
else
{
m_index.m_entries.emplace_back(
std::make_shared<Entry>(fileName, fileSize, isOutdated));
}
}
void Cloud::UpdateIndexByRestoredFilesImpl(RestoredFilesCollection const & files,
uint64_t lastSyncTimestampInSec)
{
m_index.m_isOutdated = false;
m_index.m_lastUpdateInHours =
static_cast<uint64_t>(duration_cast<hours>(system_clock::now().time_since_epoch()).count());
m_index.m_lastSyncTimestamp = lastSyncTimestampInSec;
m_index.m_entries.clear();
for (auto const & f : files)
{
uint64_t fileSize = 0;
if (!CheckAndGetFileSize(f.m_filename, fileSize))
continue;
m_index.m_entries.emplace_back(
std::make_shared<Entry>(ExtractFileNameWithoutExtension(f.m_filename), fileSize,
false /* isOutdated */, f.m_hash));
}
SaveIndexImpl();
}
Cloud::EntryPtr Cloud::GetEntryImpl(std::string const & fileName) const
{
auto it = std::find_if(m_index.m_entries.begin(), m_index.m_entries.end(),
[&fileName](EntryPtr ptr) { return ptr->m_name == fileName; });
if (it != m_index.m_entries.end())
return *it;
return nullptr;
}
void Cloud::SaveIndexImpl() const
{
if (m_state != State::Enabled || m_index.m_entries.empty())
return;
auto const indexFilePath = GetIndexFilePath(m_params.m_indexName);
try
{
auto jsonData = SerializeToJson(m_index);
FileWriter w(indexFilePath);
w.Write(jsonData.c_str(), jsonData.length());
}
catch (FileWriter::Exception const & exception)
{
LOG(LWARNING, ("Exception while writing file:", indexFilePath,
"reason:", exception.what()));
}
}
void Cloud::ScheduleUploading()
{
{
std::lock_guard<std::mutex> lock(m_mutex);
if (!CanUploadImpl())
return;
SortEntriesBeforeUploadingImpl();
m_snapshotFiles.clear();
m_snapshotFiles.reserve(m_index.m_entries.size());
for (auto const & entry : m_index.m_entries)
m_snapshotFiles.emplace_back(entry->m_name);
m_uploadingStarted = true;
m_isSnapshotCreated = false;
}
ThreadSafeCallback<SynchronizationStartedHandler>([this]() { return m_onSynchronizationStarted; },
SynchronizationType::Backup);
auto entry = FindOutdatedEntry();
if (entry != nullptr)
{
ScheduleUploadingTask(entry, kTaskTimeoutInSeconds);
}
else
{
ThreadSafeCallback<SynchronizationFinishedHandler>([this]() { return m_onSynchronizationFinished; },
SynchronizationType::Backup,
SynchronizationResult::Success, "");
}
}
void Cloud::ScheduleUploadingTask(EntryPtr const & entry, uint32_t timeout)
{
GetPlatform().RunDelayedTask(Platform::Thread::Network, seconds(timeout), [this, entry]()
{
std::string entryName;
std::string entryHash;
bool isInvalidToken;
{
std::lock_guard<std::mutex> lock(m_mutex);
// Uploading has finished.
if (!m_uploadingStarted)
return;
ASSERT(entry->m_isOutdated, ());
entryName = entry->m_name;
entryHash = entry->m_hash;
isInvalidToken = m_accessToken.empty();
}
if (!m_params.m_backupConverter)
{
FinishUploading(SynchronizationResult::InvalidCall, "Backup converter is not set");
return;
}
if (kServerUrl.empty())
{
FinishUploading(SynchronizationResult::NetworkError, "Empty server url");
return;
}
// Access token may become invalid between tasks.
if (isInvalidToken)
{
FinishUploading(SynchronizationResult::AuthError, "Access token is empty");
return;
}
// Prepare file to uploading.
std::string hash;
auto const uploadedName = PrepareFileToUploading(entryName, hash);
auto deleteAfterUploading = [uploadedName]() {
if (!uploadedName.empty())
base::DeleteFileX(uploadedName);
};
SCOPE_GUARD(deleteAfterUploadingGuard, deleteAfterUploading);
if (uploadedName.empty())
{
FinishUploading(SynchronizationResult::DiskError, "File preparation error");
return;
}
// Upload only if calculated hash is not equal to previous one.
if (entryHash != hash && !UploadFile(uploadedName))
return;
// Mark entry as not outdated.
bool isSnapshotCreated;
{
std::lock_guard<std::mutex> lock(m_mutex);
entry->m_isOutdated = false;
entry->m_hash = hash;
SaveIndexImpl();
isSnapshotCreated = m_isSnapshotCreated;
}
// Schedule next uploading task.
auto nextEntry = FindOutdatedEntry();
if (nextEntry != nullptr)
{
ScheduleUploadingTask(nextEntry, kTaskTimeoutInSeconds);
return;
}
// Finish snapshot.
if (isSnapshotCreated)
{
auto const result = FinishSnapshot();
if (!result)
{
FinishUploadingOnRequestError(result);
return;
}
}
FinishUploading(SynchronizationResult::Success, {});
});
}
bool Cloud::UploadFile(std::string const & uploadedName)
{
uint64_t uploadedFileSize = 0;
if (!base::GetFileSize(uploadedName, uploadedFileSize))
{
FinishUploading(SynchronizationResult::DiskError, "File size calculation error");
return false;
}
// Create snapshot if it was not created early.
bool snapshotCreated;
std::vector<std::string> snapshotFiles;
{
std::lock_guard<std::mutex> lock(m_mutex);
snapshotCreated = m_isSnapshotCreated;
std::swap(snapshotFiles, m_snapshotFiles);
}
if (!snapshotCreated)
{
auto const result = CreateSnapshot(snapshotFiles);
if (!result)
{
FinishUploadingOnRequestError(result);
return false;
}
std::lock_guard<std::mutex> lock(m_mutex);
m_isSnapshotCreated = true;
}
// Request uploading.
auto const result = RequestUploading(uploadedName);
if (result.m_isMalformed)
{
FinishUploading(SynchronizationResult::NetworkError, "Malformed uploading response");
return false;
}
if (!result.m_requestResult)
{
FinishUploadingOnRequestError(result.m_requestResult);
return false;
}
// Execute uploading.
auto const executeResult = ExecuteUploading(result.m_response, uploadedName);
if (!executeResult)
{
FinishUploadingOnRequestError(executeResult);
return false;
}
// Notify about successful uploading.
auto const notificationResult = NotifyAboutUploading(uploadedName, uploadedFileSize);
if (!notificationResult)
{
FinishUploadingOnRequestError(notificationResult);
return false;
}
return true;
}
void Cloud::FinishUploadingOnRequestError(Cloud::RequestResult const & result)
{
switch (result.m_status)
{
case RequestStatus::Ok:
ASSERT(false, ("Possibly incorrect call"));
return;
case RequestStatus::Forbidden:
FinishUploading(SynchronizationResult::AuthError, result.m_error);
return;
case RequestStatus::NetworkError:
FinishUploading(SynchronizationResult::NetworkError, result.m_error);
return;
}
}
std::string Cloud::PrepareFileToUploading(std::string const & fileName, std::string & hash)
{
// 1. Get path to the original uploading file.
std::string filePath;
{
std::lock_guard<std::mutex> lock(m_mutex);
auto const it = m_files.find(fileName);
if (it == m_files.end())
return {};
filePath = it->second;
}
if (!GetPlatform().IsFileExistsByFullPath(filePath))
return {};
// 2. Calculate SHA1 of the original uploading file.
auto const originalSha1 = coding::SHA1::CalculateBase64(filePath);
if (originalSha1.empty())
return {};
// 3. Create a temporary file from the original uploading file.
auto name = ExtractFileNameWithoutExtension(filePath);
auto const tmpPath = base::JoinPath(GetPlatform().TmpDir(), name + ".tmp");
if (!base::CopyFileX(filePath, tmpPath))
return {};
SCOPE_GUARD(tmpFileGuard, std::bind(&base::DeleteFileX, std::cref(tmpPath)));
// 4. Calculate SHA1 of the temporary file and compare with original one.
// Original file can be modified during copying process, so we have to
// compare original file with the temporary file after copying.
auto const tmpSha1 = coding::SHA1::CalculateBase64(tmpPath);
if (originalSha1 != tmpSha1)
return {};
auto const outputPath = base::JoinPath(GetPlatform().TmpDir(), name + ".uploaded");
// 5. Convert temporary file and save to output path.
CHECK(m_params.m_backupConverter, ());
auto const convertionResult = m_params.m_backupConverter(tmpPath, outputPath);
hash = convertionResult.m_hash;
if (convertionResult.m_isSuccessful)
return outputPath;
return {};
}
Cloud::RequestResult Cloud::CreateSnapshot(std::vector<std::string> const & files) const
{
ASSERT(!files.empty(), ());
auto const url = BuildMethodUrl(m_params.m_serverPathName, kServerCreateSnapshotMethod);
return CloudRequest<SnapshotCreateRequestData>(url, GetAccessToken(), files);
}
Cloud::RequestResult Cloud::FinishSnapshot() const
{
auto const url = BuildMethodUrl(m_params.m_serverPathName, kServerFinishSnapshotMethod);
return CloudRequest<SnapshotRequestData>(url, GetAccessToken());
}
Cloud::SnapshotResult Cloud::GetBestSnapshot() const
{
auto const url = BuildMethodUrl(m_params.m_serverPathName, kServerBestSnapshotMethod);
SnapshotResult result;
auto responseHandler = [&result, &url](
int code, std::string const & serverResponse) -> Cloud::RequestResult
{
if (IsSuccessfulResultCode(code))
{
ParseRequestJsonResult(url, serverResponse, result);
return {Cloud::RequestStatus::Ok, {}};
}
// Server return 404 in case of snapshot absence.
if (code == 404)
return {Cloud::RequestStatus::Ok, {}};
return {Cloud::RequestStatus::NetworkError, serverResponse};
};
result.m_requestResult =
CloudRequestWithResult<SnapshotRequestData>(url, GetAccessToken(), responseHandler);
return result;
}
Cloud::UploadingResult Cloud::RequestUploading(std::string const & filePath) const
{
auto const url = BuildMethodUrl(m_params.m_serverPathName, kServerUploadMethod);
return CloudRequestWithJsonResult<UploadingRequestData, UploadingResult>(
url, GetAccessToken(), filePath);
}
Cloud::RequestResult Cloud::ExecuteUploading(UploadingResponseData const & responseData,
std::string const & filePath)
{
ASSERT(!responseData.m_url.empty(), ());
ASSERT(!responseData.m_method.empty(), ());
static std::string const kStatErrors[] = {"download_server", "fallback_server"};
std::vector<std::string> urls;
urls.push_back(responseData.m_url);
if (!responseData.m_fallbackUrl.empty())
urls.push_back(responseData.m_fallbackUrl);
std::string errorStr;
int code = 0;
for (size_t i = 0; i < urls.size(); ++i)
{
platform::HttpUploader request;
request.SetUrl(urls[i]);
request.SetMethod(responseData.m_method);
for (auto const & f : responseData.m_fields)
{
ASSERT_EQUAL(f.size(), 2, ());
request.SetParam(f[0], f[1]);
}
request.SetFilePath(filePath);
auto const result = request.Upload();
code = result.m_httpCode;
if (IsSuccessfulResultCode(code))
return {RequestStatus::Ok, {}};
errorStr = strings::to_string(code) + " " + result.m_description;
if (code >= 500 && code < 600)
{
ASSERT_LESS_OR_EQUAL(i, ARRAY_SIZE(kStatErrors), ());
alohalytics::TStringMap details{
{"service", m_params.m_serverPathName}, {"type", kStatErrors[i]}, {"error", errorStr}};
alohalytics::Stats::Instance().LogEvent("Cloud_Backup_error", details);
return {RequestStatus::NetworkError, errorStr};
}
}
return {code == 403 ? RequestStatus::Forbidden : RequestStatus::NetworkError, errorStr};
}
Cloud::RequestResult Cloud::NotifyAboutUploading(std::string const & filePath,
uint64_t fileSize) const
{
auto const url = BuildMethodUrl(m_params.m_serverPathName, kServerNotifyMethod);
return CloudRequest<NotifyRequestData>(url, GetAccessToken(), filePath, fileSize);
}
Cloud::EntryPtr Cloud::FindOutdatedEntry() const
{
std::lock_guard<std::mutex> lock(m_mutex);
for (auto const & entry : m_index.m_entries)
{
if (entry->m_isOutdated)
return entry;
}
return nullptr;
}
void Cloud::FinishUploading(SynchronizationResult result, std::string const & errorStr)
{
{
std::lock_guard<std::mutex> lock(m_mutex);
if (!m_uploadingStarted)
return;
if (result == SynchronizationResult::UserInterrupted)
{
// If the user interrupts uploading, we consider all files as up-to-dated.
// The files will be checked and uploaded (if necessary) next time.
m_index.m_isOutdated = false;
for (auto & entry : m_index.m_entries)
entry->m_isOutdated = false;
}
else
{
if (result == SynchronizationResult::Success)
{
m_index.m_isOutdated = false;
m_index.m_lastSyncTimestamp = static_cast<uint64_t>(
duration_cast<seconds>(system_clock::now().time_since_epoch()).count());
}
else
{
m_index.m_isOutdated = true;
}
}
m_uploadingStarted = false;
SaveIndexImpl();
}
if (result == SynchronizationResult::AuthError)
ThreadSafeCallback<InvalidTokenHandler>([this]() { return m_onInvalidToken; });
ThreadSafeCallback<SynchronizationFinishedHandler>(
[this]() { return m_onSynchronizationFinished; }, SynchronizationType::Backup, result,
errorStr);
}
void Cloud::SetAccessToken(std::string const & token)
{
std::lock_guard<std::mutex> lock(m_mutex);
m_accessToken = token;
}
std::string Cloud::GetAccessToken() const
{
std::lock_guard<std::mutex> lock(m_mutex);
return m_accessToken;
}
bool Cloud::IsRestoringEnabledCommonImpl(std::string & reason) const
{
if (m_state != State::Enabled)
{
reason = "Cloud is not enabled";
return false;
}
if (!m_indexUpdated)
{
reason = "Cloud is not initialized";
return false;
}
if (m_accessToken.empty())
{
reason = "User is not authenticated";
return false;
}
return true;
}
bool Cloud::IsRequestRestoringEnabled(std::string & reason) const
{
std::lock_guard<std::mutex> lock(m_mutex);
if (!IsRestoringEnabledCommonImpl(reason))
return false;
if (m_restoringState != RestoringState::None)
{
reason = "Restoring process exists";
return false;
}
return true;
}
bool Cloud::IsApplyRestoringEnabled(std::string & reason) const
{
std::lock_guard<std::mutex> lock(m_mutex);
if (!IsRestoringEnabledCommonImpl(reason))
return false;
if (m_restoringState != RestoringState::Requested)
{
reason = "Restoring process does not exist";
return false;
}
if (m_bestSnapshotData.m_deviceId.empty())
{
reason = "Backup is absent";
return false;
}
return true;
}
void Cloud::RequestRestoring()
{
FinishUploading(SynchronizationResult::UserInterrupted, {});
ThreadSafeCallback<SynchronizationStartedHandler>(
[this]() { return m_onSynchronizationStarted; }, SynchronizationType::Restore);
auto const status = GetPlatform().ConnectionStatus();
if (status == Platform::EConnectionType::CONNECTION_NONE)
{
ThreadSafeCallback<SynchronizationFinishedHandler>(
[this]() { return m_onSynchronizationFinished; }, SynchronizationType::Restore,
SynchronizationResult::InvalidCall, "No internet connection");
return;
}
std::string reason;
if (!IsRequestRestoringEnabled(reason))
{
ThreadSafeCallback<SynchronizationFinishedHandler>(
[this]() { return m_onSynchronizationFinished; }, SynchronizationType::Restore,
SynchronizationResult::InvalidCall, reason);
return;
}
{
std::lock_guard<std::mutex> lock(m_mutex);
m_restoringState = RestoringState::Requested;
}
GetBestSnapshotTask(kTaskTimeoutInSeconds, 0 /* attemptIndex */);
}
void Cloud::ApplyRestoring()
{
auto const status = GetPlatform().ConnectionStatus();
if (status == Platform::EConnectionType::CONNECTION_NONE)
{
ThreadSafeCallback<SynchronizationFinishedHandler>(
[this]() { return m_onSynchronizationFinished; }, SynchronizationType::Restore,
SynchronizationResult::InvalidCall, "No internet connection");
return;
}
std::string reason;
if (!IsApplyRestoringEnabled(reason))
{
ThreadSafeCallback<SynchronizationFinishedHandler>(
[this]() { return m_onSynchronizationFinished; }, SynchronizationType::Restore,
SynchronizationResult::InvalidCall, reason);
return;
}
{
std::lock_guard<std::mutex> lock(m_mutex);
m_restoringState = RestoringState::Applying;
}
GetPlatform().RunTask(Platform::Thread::File, [this]()
{
// Create folder if it does not exist.
auto const dirPath = GetRestoringFolder(m_params.m_serverPathName);
if (!GetPlatform().IsFileExistsByFullPath(dirPath) && !Platform::MkDirChecked(dirPath))
{
FinishRestoring(SynchronizationResult::DiskError, "Unable create restoring directory");
return;
}
// Get list of files to download.
auto downloadingList = GetDownloadingList(dirPath);
if (downloadingList.empty())
{
std::lock_guard<std::mutex> lock(m_mutex);
if (m_restoringState != RestoringState::Applying)
return;
// Try to complete restoring process.
CompleteRestoring(dirPath);
}
else
{
// Start downloading.
DownloadingTask(dirPath, false /* useFallbackUrl */, std::move(downloadingList));
}
});
}
void Cloud::CancelRestoring()
{
FinishRestoring(SynchronizationResult::UserInterrupted, {});
}
void Cloud::GetBestSnapshotTask(uint32_t timeout, uint32_t attemptIndex)
{
GetPlatform().RunDelayedTask(Platform::Thread::Network, seconds(timeout),
[this, timeout, attemptIndex]()
{
bool isInvalidToken;
{
// Restoring state may be changed between tasks.
std::lock_guard<std::mutex> lock(m_mutex);
if (m_restoringState != RestoringState::Requested)
return;
isInvalidToken = m_accessToken.empty();
}
if (kServerUrl.empty())
{
FinishRestoring(SynchronizationResult::NetworkError, "Empty server url");
return;
}
// Access token may become invalid between tasks.
if (isInvalidToken)
{
FinishRestoring(SynchronizationResult::AuthError, "Access token is empty");
return;
}
auto const result = GetBestSnapshot();
if (result.m_isMalformed)
{
FinishRestoring(SynchronizationResult::NetworkError, "Malformed best snapshot response");
}
else if (result.m_requestResult.m_status == RequestStatus::Ok)
{
ProcessSuccessfulSnapshot(result);
}
else if (result.m_requestResult.m_status == RequestStatus::NetworkError)
{
// Retry request up to kRetryMaxAttempts times.
if (attemptIndex + 1 == kRetryMaxAttempts)
{
FinishRestoring(SynchronizationResult::NetworkError, result.m_requestResult.m_error);
return;
}
auto const retryTimeout = attemptIndex == 0 ? kRetryTimeoutInSeconds
: timeout * kRetryDegradationFactor;
GetBestSnapshotTask(retryTimeout, attemptIndex + 1);
}
else if (result.m_requestResult.m_status == RequestStatus::Forbidden)
{
FinishRestoring(SynchronizationResult::AuthError, result.m_requestResult.m_error);
}
});
}
void Cloud::ProcessSuccessfulSnapshot(SnapshotResult const & result)
{
// Check if the backup is empty.
if (result.m_response.m_files.empty())
{
ThreadSafeCallback<RestoreRequestedHandler>([this]() { return m_onRestoreRequested; },
RestoringRequestResult::NoBackup, "",
result.m_response.m_datetime);
FinishRestoring(SynchronizationResult::Success, {});
return;
}
// Check if there is enough space to download backup.
auto const totalSize = result.m_response.GetTotalSizeOfFiles();
auto constexpr kSizeScalar = 10;
if (totalSize * kSizeScalar >= GetPlatform().GetWritableStorageSpace())
{
ThreadSafeCallback<RestoreRequestedHandler>([this]() { return m_onRestoreRequested; },
RestoringRequestResult::NotEnoughDiskSpace, "",
result.m_response.m_datetime);
FinishRestoring(SynchronizationResult::DiskError, {});
return;
}
// Save snapshot data.
bool isInterrupted;
{
std::lock_guard<std::mutex> lock(m_mutex);
m_bestSnapshotData = result.m_response;
isInterrupted = (m_restoringState != RestoringState::Requested);
}
if (!isInterrupted)
{
ThreadSafeCallback<RestoreRequestedHandler>([this]() { return m_onRestoreRequested; },
RestoringRequestResult::BackupExists,
result.m_response.m_deviceName,
result.m_response.m_datetime);
}
}
void Cloud::FinishRestoring(Cloud::SynchronizationResult result, std::string const & errorStr)
{
{
std::lock_guard<std::mutex> lock(m_mutex);
if (m_restoringState == RestoringState::None)
return;
// We cannot interrupt restoring process on the finalizing step.
if (result == Cloud::SynchronizationResult::UserInterrupted &&
m_restoringState == RestoringState::Finalizing)
{
return;
}
m_bestSnapshotData = {};
m_restoringState = RestoringState::None;
}
if (result == SynchronizationResult::AuthError)
ThreadSafeCallback<InvalidTokenHandler>([this]() { return m_onInvalidToken; });
ThreadSafeCallback<SynchronizationFinishedHandler>(
[this]() { return m_onSynchronizationFinished; }, SynchronizationType::Restore, result,
errorStr);
}
std::list<Cloud::SnapshotFileData> Cloud::GetDownloadingList(std::string const & restoringDirPath)
{
auto const snapshotFile = base::JoinPath(restoringDirPath, kSnapshotFile);
auto const prevSnapshot = ReadSnapshotFile(snapshotFile);
SnapshotResponseData currentSnapshot;
{
std::lock_guard<std::mutex> lock(m_mutex);
currentSnapshot = m_bestSnapshotData;
}
// Save to use in the next sessions.
try
{
auto jsonData = SerializeToJson(currentSnapshot);
FileWriter w(snapshotFile);
w.Write(jsonData.data(), jsonData.length());
}
catch (FileWriter::Exception const & exception)
{
LOG(LWARNING, ("Exception while writing file:", snapshotFile,
"reason:", exception.what()));
FinishRestoring(SynchronizationResult::DiskError, "Could not save snapshot file");
return {};
}
// If the snapshot from previous sessions is not valid, return files from new one.
if (currentSnapshot.m_deviceId != prevSnapshot.m_deviceId ||
currentSnapshot.m_datetime != prevSnapshot.m_datetime ||
currentSnapshot.m_files.size() != prevSnapshot.m_files.size())
{
return std::list<Cloud::SnapshotFileData>(currentSnapshot.m_files.begin(),
currentSnapshot.m_files.end());
}
// Check if some files were completely downloaded last time.
std::list<Cloud::SnapshotFileData> result;
for (auto & f : currentSnapshot.m_files)
{
auto const restoringFile = base::JoinPath(restoringDirPath, f.m_fileName);
if (!GetPlatform().IsFileExistsByFullPath(restoringFile))
{
result.push_back(std::move(f));
continue;
}
uint64_t fileSize = 0;
if (!base::GetFileSize(restoringFile, fileSize) || fileSize != f.m_fileSize)
result.push_back(std::move(f));
}
return result;
}
void Cloud::DownloadingTask(std::string const & dirPath, bool useFallbackUrl,
std::list<Cloud::SnapshotFileData> && files)
{
GetPlatform().RunTask(Platform::Thread::Network,
[this, dirPath, useFallbackUrl, files = std::move(files)]() mutable
{
std::string snapshotDeviceId;
{
// Check if the process was interrupted.
std::lock_guard<std::mutex> lock(m_mutex);
if (m_restoringState != RestoringState::Applying)
return;
snapshotDeviceId = m_bestSnapshotData.m_deviceId;
}
if (files.empty())
{
CompleteRestoring(dirPath);
return;
}
auto const f = files.front();
files.erase(files.begin());
auto const filePath = base::JoinPath(dirPath, f.m_fileName);
auto const url = BuildMethodUrl(m_params.m_serverPathName, kServerDownloadMethod);
auto const result = CloudRequestWithJsonResult<DownloadingRequestData, DownloadingResult>(
url, GetAccessToken(), snapshotDeviceId, f.m_fileName, f.m_datetime);
if (result.m_isMalformed || result.m_response.m_url.empty())
{
FinishRestoring(SynchronizationResult::NetworkError, "Malformed downloading file response");
}
else if (result.m_requestResult.m_status == RequestStatus::Ok)
{
if (useFallbackUrl && result.m_response.m_fallbackUrl.empty())
{
FinishRestoring(SynchronizationResult::NetworkError, "Fallback url is absent");
return;
}
platform::RemoteFile remoteFile(useFallbackUrl ? result.m_response.m_fallbackUrl
: result.m_response.m_url,
{} /* accessToken */, false /* allowRedirection */);
auto const downloadResult = remoteFile.Download(filePath);
if (downloadResult.m_status == platform::RemoteFile::Status::Ok)
{
// Download next file.
DownloadingTask(dirPath, false /* useFallbackUrl */, std::move(files));
}
else if (downloadResult.m_status == platform::RemoteFile::Status::DiskError)
{
FinishRestoring(SynchronizationResult::DiskError, downloadResult.m_description);
}
else if (downloadResult.m_status == platform::RemoteFile::Status::Forbidden)
{
FinishRestoring(SynchronizationResult::AuthError, downloadResult.m_description);
}
else
{
alohalytics::TStringMap details{
{"service", m_params.m_serverPathName},
{"type", useFallbackUrl ? "fallback_server" : "download_server"},
{"error", downloadResult.m_description}};
alohalytics::Stats::Instance().LogEvent("Cloud_Restore_error", details);
if (!useFallbackUrl)
{
// Retry to download by means of fallback url.
files.push_front(std::move(f));
DownloadingTask(dirPath, true /* useFallbackUrl */, std::move(files));
}
else
{
FinishRestoring(SynchronizationResult::NetworkError, downloadResult.m_description);
}
}
}
else if (result.m_requestResult.m_status == RequestStatus::NetworkError)
{
FinishRestoring(SynchronizationResult::NetworkError, result.m_requestResult.m_error);
}
else if (result.m_requestResult.m_status == RequestStatus::Forbidden)
{
FinishRestoring(SynchronizationResult::AuthError, result.m_requestResult.m_error);
}
});
}
void Cloud::CompleteRestoring(std::string const & dirPath)
{
GetPlatform().RunTask(Platform::Thread::File, [this, dirPath]()
{
if (!m_params.m_restoreConverter)
{
FinishRestoring(SynchronizationResult::InvalidCall, "Restore converter is not set");
return;
}
// Check files and convert them to expected format.
SnapshotResponseData currentSnapshot;
{
std::lock_guard<std::mutex> lock(m_mutex);
currentSnapshot = m_bestSnapshotData;
}
RestoredFilesCollection convertedFiles;
convertedFiles.reserve(currentSnapshot.m_files.size());
for (auto & f : currentSnapshot.m_files)
{
auto const restoringFile = base::JoinPath(dirPath, f.m_fileName);
if (!GetPlatform().IsFileExistsByFullPath(restoringFile))
{
FinishRestoring(SynchronizationResult::DiskError, "Restored file is absent");
return;
}
uint64_t fileSize = 0;
if (!base::GetFileSize(restoringFile, fileSize) || fileSize != f.m_fileSize)
{
std::string const str = "Restored file has incorrect size. Expected size = " +
strings::to_string(f.m_fileSize) +
". Server size =" + strings::to_string(fileSize);
FinishRestoring(SynchronizationResult::DiskError, str);
return;
}
auto const fn = f.m_fileName + ".converted";
auto const convertedFile = base::JoinPath(dirPath, fn);
auto const convertionResult = m_params.m_restoreConverter(restoringFile, convertedFile);
if (!convertionResult.m_isSuccessful)
{
FinishRestoring(SynchronizationResult::DiskError, "Restored file conversion error");
return;
}
convertedFiles.emplace_back(fn, convertionResult.m_hash);
}
// Check if the process was interrupted and start finalizing.
{
std::lock_guard<std::mutex> lock(m_mutex);
if (m_restoringState != RestoringState::Applying)
return;
m_restoringState = RestoringState::Finalizing;
}
GetPlatform().RunTask(Platform::Thread::Gui,
[this, dirPath, convertedFiles = std::move(convertedFiles)]() mutable
{
ThreadSafeCallback<RestoredFilesPreparedHandler>([this]() { return m_onRestoredFilesPrepared; });
ApplyRestoredFiles(dirPath, std::move(convertedFiles));
});
});
}
void Cloud::ApplyRestoredFiles(std::string const & dirPath, RestoredFilesCollection && files)
{
GetPlatform().RunTask(Platform::Thread::File, [this, dirPath, files = std::move(files)]()
{
// Delete all files in the destination folder.
if (GetPlatform().IsFileExistsByFullPath(m_params.m_restoringFolder) &&
!GetPlatform().RmDirRecursively(m_params.m_restoringFolder))
{
FinishRestoring(SynchronizationResult::DiskError, "Could not delete restoring folder");
return;
}
// Move files.
if (!GetPlatform().MkDirChecked(m_params.m_restoringFolder))
{
FinishRestoring(SynchronizationResult::DiskError, "Could not create restoring folder");
return;
}
RestoredFilesCollection readyFiles;
readyFiles.reserve(files.size());
for (auto const & f : files)
{
auto const restoredFile = base::JoinPath(dirPath, f.m_filename);
auto const finalFilename =
base::FilenameWithoutExt(f.m_filename) + m_params.m_restoredFileExtension;
auto const readyFile = base::JoinPath(m_params.m_restoringFolder, finalFilename);
if (!base::RenameFileX(restoredFile, readyFile))
{
FinishRestoring(SynchronizationResult::DiskError, "Restored file moving error");
return;
}
readyFiles.emplace_back(readyFile, f.m_hash);
}
// Reset upload index to the restored state.
{
std::lock_guard<std::mutex> lock(m_mutex);
m_files.clear();
auto const lastSyncTimestampInSec = m_bestSnapshotData.m_datetime / 1000;
UpdateIndexByRestoredFilesImpl(readyFiles, lastSyncTimestampInSec);
}
// Delete temporary directory.
GetPlatform().RmDirRecursively(dirPath);
FinishRestoring(SynchronizationResult::Success, {});
});
}
//static
Cloud::State Cloud::GetCloudState(std::string const & paramName)
{
int stateValue;
if (!settings::Get(paramName, stateValue))
{
stateValue = static_cast<int>(State::Unknown);
settings::Set(paramName, stateValue);
}
return static_cast<State>(stateValue);
}
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