freenet.support.io

Class FilenameGenerator

java.lang.Object

freenet.support.io.FilenameGenerator

public class FilenameGenerator
extends java.lang.Object

Tracks the current temporary files settings (dir and prefix), and translates between ID's and filenames. Also provides functions for creating tempfiles (which should be safe against symlink attacks and race conditions). FIXME Consider using File.createTempFile(). Note that using our own code could actually be more secure if we use a better PRNG than they do (they use "new Random()" IIRC, but maybe that's fixed now?). If we do change to using File.createTempFile(), we will need to change TempFileBucket accordingly.

Constructor Summary

Constructors

Constructor and Description
FilenameGenerator(java.util.Random random, boolean wipeFiles, java.io.File dir, java.lang.String prefix)

Method Summary

Modifier and Type	Method and Description
java.io.File	getDir()
java.io.File	getFilename(long id)
java.io.File	makeRandomFile()
long	makeRandomFilename()
protected boolean	matches(java.io.File file)
java.io.File	maybeMove(java.io.File file, long id)

Methods inherited from class java.lang.Object

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

Constructor Detail

FilenameGenerator

public FilenameGenerator(java.util.Random random,
                         boolean wipeFiles,
                         java.io.File dir,
                         java.lang.String prefix)
                  throws java.io.IOException

Parameters:

random -

wipeFiles -

dir - if null then use the default temporary directory

prefix -

Throws:

java.io.IOException

Method Detail

makeRandomFilename

public long makeRandomFilename()
                        throws java.io.IOException

Throws:

java.io.IOException

getFilename

public java.io.File getFilename(long id)

makeRandomFile

public java.io.File makeRandomFile()
                            throws java.io.IOException

Throws:

java.io.IOException

getDir

public java.io.File getDir()

matches

protected boolean matches(java.io.File file)

maybeMove

public java.io.File maybeMove(java.io.File file,
                              long id)