1. Epic GamesDeveloper
  3. FNetworkPlatformFile

FNetworkPlatformFile

Wrapper to redirect the low level file system to a server

API > API/Runtime > API/Runtime/NetworkFile

Inheritance Hierarchy

References

   
Module NetworkFile
Header /Engine/Source/Runtime/NetworkFile/Public/NetworkPlatformFile.h
Include #include "NetworkPlatformFile.h"

Syntax

class FNetworkPlatformFile :  
    public IPlatformFile,  
    public FSelfRegisteringExec

Remarks

Wrapper to redirect the low level file system to a server

Variables

  Type Name Description
Protected variable bool bHasLoadedDDCDirectories This is true after the DDC directories have been loaded from the DDC system
Protected variable bool bIsUsable  
Protected variable TSet< FString > CachedLocalFiles This keeps track of what files have been "EnsureFileIsLocal'd"
Protected variable EConnectionFlags ConnectionFlags The connection flags are passed to the server during GetFileList the server may cache them
Protected variable int32 FileServerPort  
Protected variable float HeartbeatFrequency Frequency to send heartbeats to server in seconds set to negative number to disable.
Protected variable IPlatformFile * InnerPlatformFile The file interface to read/write local files with
Protected variable TArray< FString > LocalDirectories Set of directories that should use the local filesystem
Protected variable FCriticalSection LocalDirectoriesCriticalSection  
Protected variable FString ServerEngineDir The server engine dir
Protected variable FString ServerEnginePlatformExtensionsDir The server engine platform extensions dir
Protected variable FServerTOC ServerFiles This is the "TOC" of the server
Protected variable FString ServerProjectDir The server game dir
Protected variable FString ServerProjectPlatformExtensionsDir The server project platform extensions dir
Protected variable FCriticalSection SynchronizationObject  
Protected variable int32 TotalFilesFoundLocally  
Protected variable int32 TotalFilesSynced  
Protected variable double TotalNetworkSyncTime  
Protected variable double TotalTimeSpentInUnsolicitedPackages  
Protected variable int32 TotalUnsolicitedPackages  
Protected variable double TotalWaitForAsyncUnsolicitedPackages  
Protected variable double TotalWriteTime Some stats for messuring network platform file performance
Protected variable int32 UnsolicitedPackagesHits  
Protected variable int32 UnsolicitedPackageWaits  

Constructors

  Type Name Description
Public function   Constructor

Destructors

  Type Name Description
Public function Virtual   Destructor

Functions

  Type Name Description
Protected function Virtual void Convert the given filename from the server to the client version of it NOTE: Potentially modifies the input FString!!!!
Public function Static void

ConvertServerFilenameToClientFilename ( FString& FilenameToConvert,
const FString& InServerEngineDir,
const FString& InServerProjectDir,
const FString& InServerEnginePlatformExtensionsDir,
const FString& InServerProjectPlatformExtensionsDir
)

  
Protected function Virtual void  
Protected function Virtual void

GetFileInfo ( const TCHAR* Filename,
FFileInfo& Info
)

  
Public function Static const TCHAR *  
Public function Virtual Const FString  
Protected function Virtual bool

InitializeInternal ( IPlatformFile* Inner,
const TCHAR* HostIP
)

 Initialize network platform file give the specified host IP
Public function Virtual bool  
Protected function void Does normal path standardization, and also any extra modifications to make string comparisons against the internal directory list work properly.
Protected function Virtual void

OnFileUpdated ( const FString& LocalFilename
)

  
Protected function Virtual void Send a heartbeat message to the file server.
Protected function Virtual void

ProcessServerCachedFilesResponse ( FArrayReader& InReponse,
const FPackageFileVersion& ServerPackageVersion,
const int32 ServerPackageLicenseeVersion
)

  
Protected function Virtual void

ProcessServerInitialResponse ( FArrayReader& InResponse,
FPackageFileVersion& OutServerPackageVersion,
int32& OutServerPackageLicenseeVersion
)

  
Public function Virtual bool

ReceiveResponse ( TArray< uint8 >& Out
)

  
Public function Virtual bool

SendPayloadAndReceiveResponse ( TArray< uint8 >& In,
TArray< uint8 >& Out
)

  
Public function bool

SendReadMessage ( uint8* Destination,
int64 BytesToRead
)

  
Public function bool

SendWriteMessage ( const uint8* Source,
int64 BytesToWrite
)

  

Overridden from IPlatformFile

  Type Name Description
Public function Virtual FString

ConvertToAbsolutePathForExternalAppForRead ( const TCHAR* Filename
)

 Converts passed in filename to use an absolute path (for reading).
Public function Virtual FString Converts passed in filename to use an absolute path (for writing)
Public function Virtual bool

CopyFile ( const TCHAR* To,
const TCHAR* From,
EPlatformFileRead ReadFlags,
EPlatformFileWrite WriteFlags
)

 Copy a file. This will fail if the destination file already exists.
Public function Virtual bool

CreateDirectory ( const TCHAR* Directory
)

 Create a directory and return true if the directory was created or already existed.
Public function Virtual bool

CreateDirectoryTree ( const TCHAR* Directory
)

 Create a directory, including any parent directories and return true if the directory was created or already existed.
Public function Virtual bool

DeleteDirectory ( const TCHAR* Directory
)

 Delete a directory and return true if the directory was deleted or otherwise does not exist.
Public function Virtual bool

DeleteDirectoryRecursively ( const TCHAR* Directory
)

 Delete all files and subdirectories in a directory, then delete the directory itself
Public function Virtual bool

DeleteFile ( const TCHAR* Filename
)

 Delete a file and return true if the file exists. Will not delete read only files.
Public function Virtual bool
DirectoryExists

( const TCHAR* Directory
)

 Return true if the directory exists.
Public function Virtual bool

FileExists ( const TCHAR* Filename
)

 Return true if the file exists.
Public function Virtual int64

FileSize ( const TCHAR* Filename
)

 Return the size of the file, or -1 if it doesn't exist.
Public function Virtual FDateTime

GetAccessTimeStamp ( const TCHAR* Filename
)

 Return the last access time of a file.
Public function Virtual FString

GetFilenameOnDisk ( const TCHAR* Filename
)

 For case insensitive filesystems, returns the full path of the file with the same case as in the filesystem
Public function Virtual IPlatformFile * Gets the platform file wrapped by this file.
Public function Virtual Const const TCHAR *

GetName ()

 Gets this platform file type name.
Public function Virtual FFileStatData

GetStatData ( const TCHAR* FilenameOrDirectory
)

 Return the stat data for the given file or directory.
Public function Virtual FDateTime

GetTimeStamp ( const TCHAR* Filename
)

 Return the modification time of a file.
Public function Virtual void

GetTimeStampPair ( const TCHAR* PathA,
const TCHAR* PathB,
FDateTime& OutTimeStampA,
FDateTime& OutTimeStampB
)

  
Public function Virtual bool

Initialize ( IPlatformFile* Inner,
const TCHAR* CmdLine
)

 Initializes platform file.
Public function Virtual void Performs initialization of the platform file after it has become the active (FPlatformFileManager.GetPlatformFile() will return this
Public function Virtual bool

IsReadOnly ( const TCHAR* Filename
)

 Return true if the file is read only.
Public function Virtual bool

IterateDirectory ( const TCHAR* Directory,
IPlatformFile::FDirectoryVisitor& Visitor
)

 Call the Visit function of the visitor once for each file or directory in a single directory.
Public function Virtual bool

IterateDirectoryRecursively ( const TCHAR* Directory,
IPlatformFile::FDirectoryVisitor& Visitor
)

 Call the Visit function of the visitor once for each file or directory in a directory tree.
Public function Virtual bool

IterateDirectoryStat ( const TCHAR* Directory,
IPlatformFile::FDirectoryStatVisitor& Visitor
)

 Call the Visit function of the visitor once for each file or directory in a single directory.
Public function Virtual bool Call the Visit function of the visitor once for each file or directory in a directory tree.
Public function Virtual bool

MoveFile ( const TCHAR* To,
const TCHAR* From
)

 Attempt to move a file. Return true if successful. Will not overwrite existing files.
Public function Virtual IFileHandle *

OpenRead ( const TCHAR* Filename,
bool bAllowWrite
)

 Attempt to open a file for reading.
Public function Virtual IFileHandle *

OpenWrite ( const TCHAR* Filename,
bool bAppend,
bool bAllowRead
)

 Attempt to open a file for writing.
Public function Virtual bool Sends a message to the file server, and will block until it's complete.
Public function Virtual void

SetLowerLevel ( IPlatformFile* NewLowerLevel
)

 Sets the platform file wrapped by this file.
Public function Virtual bool

SetReadOnly ( const TCHAR* Filename,
bool bNewReadOnlyValue
)

 Attempt to change the read only status of a file. Return true if successful.
Public function Virtual void

SetTimeStamp ( const TCHAR* Filename,
FDateTime DateTime
)

 Sets the modification time of a file
Public function Virtual Const bool

ShouldBeUsed ( IPlatformFile* Inner,
const TCHAR* CmdLine
)

 Checks if this platform file should be used even though it was not asked to be.
Public function Virtual void

Tick ()

 Platform file can override this to get a regular tick from the engine

Overridden from FExec

  Type Name Description
Protected function Virtual bool

Exec_Runtime ( UWorld* InWorld,
const TCHAR* Cmd,
FOutputDevice& Ar
)

 Implementation of Exec that is called on all targets where UE_ALLOW_EXEC_COMMANDS is true

Constants

Name Description
BulkFileExtension  
ExpFileExtension  
FontFileExtension  
MP4Extension  

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