| Emmanuel Lecharny (JIRA) 2006-04-20, 6:56 pm |
| [ http://issues.apache.org/jira/brows...action_12375216 ]
Emmanuel Lecharny commented on DIR-184:
---------------------------------------
What we can do is to allow those leading and trailing '\ ', accordingly to the text : "Implementations MAY escape other characters."
A good solution could be to implement this document : http://www.ietf.org/proceedings/01a...apbis-dn-06.txt
It's section 2.4 states :
"... Alternatively, if and only if the character to be escaped
is one of
",", "+", """, "\", "<", ">", ";", "#", "=", or " " <----- (has been added to RFC2253)
(ASCII 44, 43, 34, 92, 60, 62, 59, 35, or 32, respectively)
it can be prefixed by a backslash ('' ASCII 92). ..."
So the " " can be escaped.
Could you modify the JIRA report to be an improvment instead of a Major Bug?
> 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
> Type: Bug
> Reporter: Jacob S. Barrett
> Assignee: Alex Karasulu
>
> 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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