Package ghidra.formats.gfilesystem

Class AbstractFileExtractorTask

java.lang.Object

ghidra.util.task.Task

ghidra.formats.gfilesystem.AbstractFileExtractorTask

All Implemented Interfaces:

MonitoredRunnable

Direct Known Subclasses:

GFileSystemExtractAllTask

public abstract class AbstractFileExtractorTask
extends Task

Common base class for tasks that need to extract files from a GFileSystem location.

Field Summary

Fields

Modifier and Type	Field	Description
protected GFileSystem	fs
protected File	rootOutputDirectory

Fields inherited from class ghidra.util.task.Task

taskMonitor, waitForTaskCompleted

Constructor Summary

Constructors

Constructor	Description
AbstractFileExtractorTask(String title, boolean canCancel, boolean hasProgress, boolean isModal, File rootOutputDir)	See Task(String, boolean, boolean, boolean).

Method Summary

Modifier and Type	Method	Description
protected void	extractFile(GFile srcFile, File outputFile, TaskMonitor monitor)
protected InputStream	getSourceFileInputStream(GFile file, TaskMonitor monitor)
long	getTotalBytesExportedCount()	Return the number of bytes that were exported.
int	getTotalDirsExportedCount()	Return the number of directories that were exported.
int	getTotalFilesExportedCount()	Return the number of files that were exported.
protected boolean	handleUnexpectedException(GFile file, Exception e)	Allows custom handling of exceptions that occur during file extraction.
protected String	mapSourceFilenameToDest(GFile srcFile)	Maps the untrusted, potentially hostile, filename of the source file to a name that is suitable to be used to create a file on the user's local file system.
protected void	processDirectory(GFile srcGFileDirectory, File destDirectory, TaskMonitor monitor)	Extract the contents of a directory in a GFileSystem into a local file system directory.
protected void	processFile(GFile srcFile, File destFSFile, TaskMonitor monitor)
protected void	startExtract(GFileSystem fs, GFile srcDir, TaskMonitor monitor)	Starts the file extraction process.

Methods inherited from class ghidra.util.task.Task

addTaskListener, canCancel, cancel, getStatusTextAlignment, getTaskTitle, getWaitForTaskCompleted, hasProgress, isCancelled, isModal, monitoredRun, notifyTaskListeners, run, setHasProgress

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

fs

protected GFileSystem fs

rootOutputDirectory

protected File rootOutputDirectory

Constructor Details

AbstractFileExtractorTask

public AbstractFileExtractorTask(String title,
 boolean canCancel,
 boolean hasProgress,
 boolean isModal,
 File rootOutputDir)

See Task(String, boolean, boolean, boolean).

Parameters:

title - See Task(String, boolean, boolean, boolean)

canCancel - See Task(String, boolean, boolean, boolean)

hasProgress - See Task(String, boolean, boolean, boolean)

isModal - See Task(String, boolean, boolean, boolean)

rootOutputDir - base directory where files will be extracted to

Method Details

startExtract

protected void startExtract(GFileSystem fs,
 GFile srcDir,
 TaskMonitor monitor)
                     throws CancelledException,
IOException

Starts the file extraction process.

Parameters:

fs - the GFileSystem that holds the files

srcDir - the starting directory to extract, if null, start at root of file system

monitor - TaskMonitor that will be updated with progress and checked for cancel

Throws:

CancelledException - if the extraction is cancelled.

IOException - if an exception occurs extracting the files.

processDirectory

protected void processDirectory(GFile srcGFileDirectory,
 File destDirectory,
 TaskMonitor monitor)
                         throws IOException,
CancelledException

Extract the contents of a directory in a GFileSystem into a local file system directory.

The destination directory is created if not present.

Parameters:

srcGFileDirectory - if null, directory is filesystem root

destDirectory - destination / output directory

monitor - TaskMonitor to watch and update with progress

Throws:

IOException - if IO problem.

CancelledException

processFile

protected void processFile(GFile srcFile,
 File destFSFile,
 TaskMonitor monitor)
                    throws IOException,
CancelledException

Throws:

IOException

CancelledException

mapSourceFilenameToDest

protected String mapSourceFilenameToDest(GFile srcFile)
                                  throws IOException

Maps the untrusted, potentially hostile, filename of the source file to a name that is suitable to be used to create a file on the user's local file system.

NOTE: This base implementation converts relative directory names to spelled-out versions of that directory, eg. "." becomes "dot".

If you wish to modify this behavior, override this method and return different mappings.

Parameters:

srcFile - source file

Returns:

String name of the source file, possibly modified to be safer

Throws:

IOException - thrown if name is not mappable and the extract process should stop

handleUnexpectedException

protected boolean handleUnexpectedException(GFile file,
 Exception e)

Allows custom handling of exceptions that occur during file extraction.

Return true if the exception should be ignored by the file extraction process, otherwise return false if it should be propagated up the call stack.

Parameters:

file - file that was being extracted when the exception happened

e - the exception

Returns:

true if the exception should be suppressed, false if the exception should be thrown

extractFile

protected void extractFile(GFile srcFile,
 File outputFile,
 TaskMonitor monitor)
                    throws CancelledException

Throws:

CancelledException

getSourceFileInputStream

protected InputStream getSourceFileInputStream(GFile file,
 TaskMonitor monitor)
                                        throws CancelledException,
IOException

Throws:

CancelledException

IOException

getTotalFilesExportedCount

public int getTotalFilesExportedCount()

Return the number of files that were exported.

Returns:

the number of files that were exported

getTotalDirsExportedCount

public int getTotalDirsExportedCount()

Return the number of directories that were exported.

Returns:

the number of directories that were exported

getTotalBytesExportedCount

public long getTotalBytesExportedCount()

Return the number of bytes that were exported.

Returns:

the number of bytes that were exported