bool FLocalTitleFile::ReadFile(const FString& DLName)
{
const TArray< uint8 >* ExistingFileContents = DLNameToFileContents.Find(DLName);
if (ExistingFileContents != nullptr)
{
TriggerOnReadFileCompleteDelegates(true, DLName);
return true;
}
const FString FileName = GetFileNameFromDLName(DLName);
TArray<uint8> FileContents;
if (!FFileHelper::LoadFileToArray(FileContents, *(RootDirectory + FileName)))
{
TriggerOnReadFileCompleteDelegates(false, DLName);
return false;
}
DLNameToFileContents.Add(DLName, FileContents);
TriggerOnReadFileCompleteDelegates(true, DLName);
return true;
}
void FSurveyTitleCdnStorage::ReadFile_HttpRequestComplete(FHttpRequestPtr HttpRequest, FHttpResponsePtr HttpResponse, bool bSucceeded)
{
bool bResult = false;
FString ResponseStr, ErrorStr;
// should have a pending Http request
FPendingFileRequest PendingRequest = FileRequests.FindChecked(HttpRequest.Get());
FileRequests.Remove(HttpRequest.Get());
// Cloud file being operated on
FCloudFile* CloudFile = GetCloudFile(PendingRequest.FileName, true);
CloudFile->AsyncState = EOnlineAsyncTaskState::Failed;
CloudFile->Data.Empty();
if (bSucceeded &&
HttpResponse.IsValid())
{
if (EHttpResponseCodes::IsOk(HttpResponse->GetResponseCode()))
{
UE_LOG(LogEpicSurvey, Verbose, TEXT("ReadFile request complete. url=%s code=%d"),
*HttpRequest->GetURL(), HttpResponse->GetResponseCode());
// update the memory copy of the file with data that was just downloaded
CloudFile = GetCloudFile(PendingRequest.FileName, true);
CloudFile->AsyncState = EOnlineAsyncTaskState::Done;
CloudFile->Data = HttpResponse->GetContent();
// cache to disk on successful download
SaveCloudFileToDisk(CloudFile->FileName,CloudFile->Data);
bResult = true;
}
else
{
ErrorStr = FString::Printf(TEXT("Invalid response. code=%d error=%s"),
HttpResponse->GetResponseCode(), *HttpResponse->GetContentAsString());
}
}
else
{
ErrorStr = TEXT("No response");
}
if (!ErrorStr.IsEmpty())
{
UE_LOG(LogEpicSurvey, Verbose, TEXT("ReadFile request failed. %s"), *ErrorStr);
}
TriggerOnReadFileCompleteDelegates(bResult, PendingRequest.FileName);
}
bool FCdnNewsFeedTitleFile::ReadFile(const FString& FileName)
{
FString ErrorStr;
// Make sure valid filename was specified
if (FileName.IsEmpty() || FileName.Contains(TEXT(" ")))
{
ErrorStr = FString::Printf(TEXT("Invalid filename filename=%s"), *FileName);
}
// Make sure a file request for this file is not currently pending
for (TMap<IHttpRequest*, FPendingFileRequest>::TConstIterator It(FileRequests); It; ++It)
{
if (It.Value() == FPendingFileRequest(FileName))
{
ErrorStr = FString::Printf(TEXT("File request already pending for filename=%s"), *FileName);
break;
}
}
if (!ErrorStr.IsEmpty())
{
UE_LOG(LogEpicStorage, Warning, TEXT("ReadFile request failed. %s"), *ErrorStr);
TriggerOnReadFileCompleteDelegates(false, FileName);
return false;
}
// Mark file entry as in progress
FCloudFile* CloudFile = GetCloudFile(FileName, true);
CloudFile->AsyncState = EOnlineAsyncTaskState::InProgress;
// load file from disk
FString LocalFilePath = GetLocalFilePath(FileName);
bool bLoadedFile = FFileHelper::LoadFileToArray(CloudFile->Data, *LocalFilePath, FILEREAD_Silent);
if (bLoadedFile)
{
UE_LOG(LogEpicStorage, Verbose, TEXT("ReadFile request. Local file read from cache =%s"),
*LocalFilePath);
//@todo samz - move reading/hashing of local file to async task
// verify hash of file if it exists
FCloudFileHeader* CloudFileHeader = GetCloudFileHeader( FileName);
if (CloudFileHeader != NULL &&
!CloudFileHeader->Hash.IsEmpty())
{
uint8 LocalHash[20];
FSHA1::HashBuffer(CloudFile->Data.GetData(), CloudFile->Data.Num(), LocalHash);
// concatenate 20 bye SHA1 hash to string
FString LocalHashStr;
for (int Idx=0; Idx < 20; Idx++)
{
LocalHashStr += FString::Printf(TEXT("%02x"),LocalHash[Idx]);
}
// if hash matches then just use the local file
if (CloudFileHeader->Hash == LocalHashStr)
{
UE_LOG(LogEpicStorage, Verbose, TEXT("Local file hash matches cloud header. No need to download for filename=%s"), *FileName);
CloudFile->AsyncState = EOnlineAsyncTaskState::Done;
TriggerOnReadFileCompleteDelegates(true, FileName);
return true;
}
}
}
else
{
UE_LOG(LogEpicStorage, Verbose, TEXT("ReadFile request. Local file failed to read from cache =%s"),
*LocalFilePath);
}
// Empty local that was loaded
CloudFile->Data.Empty();
// Create the Http request and add to pending request list
TSharedRef<class IHttpRequest> HttpRequest = FHttpModule::Get().CreateRequest();
FileRequests.Add(&HttpRequest.Get(), FPendingFileRequest(FileName));
HttpRequest->OnProcessRequestComplete().BindThreadSafeSP(this, &FCdnNewsFeedTitleFile::ReadFile_HttpRequestComplete);
HttpRequest->SetURL( FileName );
HttpRequest->SetVerb(TEXT("GET"));
return HttpRequest->ProcessRequest();
}