Federico Bonelli created IO-499:
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Summary: FilenameUtils.directoryContains(String, String) gives
false positive when two directories exist with equal prefixes
Key: IO-499
URL: https://issues.apache.org/jira/browse/IO-499
Project: Commons IO
Issue Type: Bug
Affects Versions: 2.4
Reporter: Federico Bonelli
Priority: Minor
In a folder layout as such:
{code}
/foo/a.txt
/foo2/b.txt
{code}
The result of invoking directoryContains is wrong:
{code}
FilenameUtils.directoryContains("/foo", "/foo2/b.txt"); // returns true
{code}
even if "/foo" and "/foo2/b.txt" are the canonical paths, they start with the
same characters, and the current implementation of the method fails.
As workaround we are currently appending a path separator '/' to the first
argument.
It is noteworthy that the current implementation of
FileUtils.directoryContains() reveals this issue because it uses the
File.getCanonicalPath() to obtain the String paths of "/foo" and "/foo2/b.txt".
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