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From "Joerg Schaible (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CONFIGURATION-415) ConfigurationUtils.fileFromURL mangles files with '+' (plus sign) in the name
Date Thu, 20 May 2010 06:11:54 GMT

    [ https://issues.apache.org/jira/browse/CONFIGURATION-415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12869493#action_12869493
] 

Joerg Schaible commented on CONFIGURATION-415:
----------------------------------------------

Useful: http://maven.apache.org/plugin-developers/common-bugs.html#Converting_between_URLs_and_Filesystem_Paths

> ConfigurationUtils.fileFromURL mangles files with '+' (plus sign) in the name
> -----------------------------------------------------------------------------
>
>                 Key: CONFIGURATION-415
>                 URL: https://issues.apache.org/jira/browse/CONFIGURATION-415
>             Project: Commons Configuration
>          Issue Type: Bug
>    Affects Versions: 1.6
>            Reporter: Brian Stiles
>         Attachments: FileFromUrlTest.java
>
>
> Attached is a sample program that demonstrates the problem.  The following is the method
in ConfigurationUtils in question:
> public static File fileFromURL(URL url)
> {
> ...
>         return new File(URLDecoder.decode(url.getPath()));
> ...
> }
> URLDecoder (poorly named) decodes data encoded in the application/x-www-form-urlencoded
MIME format.  This format is commonly used to encode HTML form data.  It is not intended for
encoding URLs, though the formats are similar.
> The operative difference is that the MIME format allows the use of the plus sign ('+')
to represent spaces, whereas URLs must have spaces hex encoded ('%20').  Files may have plus
signs in the name, and therefore, decoding the plus sign as a space produces a different path.
> See attached code demonstrating the problem.
> Reference:  http://www.w3.org/MarkUp/html-spec/html-spec_8.html#SEC8.2.1
> and http://www.ietf.org/rfc/rfc1738.txt

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