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From "Emmanuel Lecharny (JIRA)" <directory-...@incubator.apache.org>
Subject [jira] Reopened: (DIR-184) DnParser does not correctly parse leading and trailing spaces and pound signs in values.
Date Mon, 21 Aug 2006 21:54:15 GMT
     [ http://issues.apache.org/jira/browse/DIR-184?page=all ]

Emmanuel Lecharny reopened DIR-184:
-----------------------------------

             
I reopen the issue because # should *not*รน be escaped in the middle of a DN.

legal values :
dn=\#sharp at the beginning
dn=sharp at the # middle
dn=sharp at the end #

illegal values
dn=#sharp at the beginning
dn=sharp at the \# middle
dn=sharp at the end \#



> DnParser does not correctly parse leading and trailing spaces and pound signs in values.
> ----------------------------------------------------------------------------------------
>
>                 Key: DIR-184
>                 URL: http://issues.apache.org/jira/browse/DIR-184
>             Project: Directory
>          Issue Type: Bug
>            Reporter: Jacob S. Barrett
>         Assigned To: Emmanuel Lecharny
>         Attachments: DIR-184.patch
>
>
> As defined in RFC 2253 section 2.4:
> (http://www.ietf.org/rfc/rfc2253.txt)
> ..
> If the UTF-8 string does not have any of the following characters
>    which need escaping, then that string can be used as the string
>    representation of the value.
>     -   a space or "#" character occurring at the beginning of the
>         string
>     -   a space character occurring at the end of the string
>     -   one of the characters ",", "+", """, "\", "<", ">" or ";"
> ...
> A string can lead with '\ ' and trail with '\ '.  Both cases are not supported by the
DnParser and cause a parsing error.  Furthermore, if a string starts with '\ ' only the spaces
leading up to the escape should be trimmed.  In addition only the spaces after '\ ' when at
the end of a value should be stripped.
> looking at the valuelexer.g file '\#' will work anywhere in the string, but should really
only be supported at the head of the string.
> If I understand the RFC correctly then these string should be supported:
> "\    four spaces leading and 3 trailing  \ " -> "\    four spaces leading and 3 trailing
 \ "
> "    \  two leading three trailing  \    " -> "\  two leading three trailing  \ "
> "\# a leading pound" -> "\# a pound"
> "a middle # pound" -> "a middle # pound" 
> "a trailing pound #" -> "a trailing pound #"
> These are not valid:
> "middle\ spaces"
> "# a leading pound" 
> "a middle \# pound" 
> "a trailing pound \#" 
> Unless the next line in the RFC is really true, "Implementations MAY escape other characters."
 This makes things a bit more hairy I think.

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