[SVN-2866] "svn log --xml" can output invalid XML

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.4.x
• Fix Version/s: 1.5.0
• Component/s: cmdline client
• Labels: bite-sized
• Assignee: Unassigned
• Reporter: Subversion Importer
• Created: 08/Aug/07 16:15
• Updated: 27/Oct/18 16:34
• Resolved: 10/Mar/09 15:22

Description

SVN can output some invalid XML with the log command. It
happens when e.g. a commit message contains control characters. Those
control characters are valid UTF-8 but are not allowed by the XML 1.0 spec
(XML 1.0 only allows control characters 0x9, 0xA and 0xD : see
http://www.w3.org/TR/REC-xml/#charsets ).

This is a concrete example from an existing repository:

svn log --xml -r 1722 svn://exaile.org/usr/local/svn/exaile/trunk | xmllint -

While keeping to XML 1.0, the only solution I can think of is to completely
strip those control characters when an XML output is desired.
Otherwise SVN could output XML 1.1, where apparently those control characters
are allowed as part of character data.

Original issue reported by pitrou