com.goldencode.util

Class PathHelper

java.lang.Object

com.goldencode.util.PathHelper

public class PathHelper
extends java.lang.Object

File system path helper methods.

Constructor Summary

Constructors

Constructor and Description
PathHelper()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	secureConcatenate(java.lang.String basePath, java.lang.String otherPath) Securely concatenates a base path with another path, ensuring that the resulting path does not leave the base path.

Methods inherited from class java.lang.Object

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

Constructor Detail

PathHelper

public PathHelper()

Method Detail

secureConcatenate

public static java.lang.String secureConcatenate(java.lang.String basePath,
                                                 java.lang.String otherPath)

Securely concatenates a base path with another path, ensuring that the resulting path does not leave the base path. If the other path is an absolute path, it is treated as a relative path. The method also removes any path redundancies (like "..").

This method works as follows:

• It normalizes otherPath to remove any path redundancies.
• If otherPath is absolute, it makes it relative by removing the root component.
• It then resolves otherPath against basePath.
• The resulting path is then normalized again to remove any new redundancies that might have been introduced by the resolve operation.
• Finally, it checks if the resulting path still starts with basePath. If it does not, it throws a SecurityException, because that would mean the path has left the base directory.

Parameters:

basePath - The base directory as a string.

otherPath - The other path to concatenate with the base path.

Returns:

The securely concatenated path as a string.

Throws:

java.lang.SecurityException - if the other path attempts to leave the base directory.