[Tickets #8286] Re: Moving folders containing umlauts may cause misencoded folder names

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Ticket URL: http://bugs.horde.org/ticket/8286
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  Ticket             | 8286
  Updated By         | rainer.groesslinger at gmail.com
  Summary            | Moving folders containing umlauts may cause misencoded
                     | folder names
  Queue              | DIMP
  Version            | 1.1.2
  Type               | Bug
  State              | Assigned
  Priority           | 1. Low
  Milestone          |
  Patch              |
  Owners             | Michael Slusarz
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rainer.groesslinger at gmail.com (2009-05-18 04:08) wrote:

The culprit seems to be dimp/imp.php:253 which calls  
String::convertCharset() from lib/Horde/String.php everytime a Folder  
is renamed:

$new = String::convertCharset($new, NLS::getCharset(), 'UTF7-IMAP');

RFC 2060 at 5.1.3 says:
'The character "&" (0x26) is represented by the two-octet sequence "&-".'

So the problem appears to be that an already encoded folder gets  
encoded again as the escape sequence contains a character ("&") which  
itself is encoded again the next time you run the encode function on  
it, which explains why it turns the starting character of an encoded  
folder sequence (like "test&APY-" into "test&-APY-") and after that  
happened, the folder is broken.