On 11/05/2013 06:08 PM, John Dennis wrote:
On 11/05/2013 12:04 PM, Petr Viktorin wrote:
On 11/05/2013 05:53 PM, John Dennis wrote:
On 11/05/2013 11:13 AM, Martin Basti wrote:
Hi list,

I'm working on ticket: https://fedorahosted.org/freeipa/ticket/3169
UTF-8 DNS names will be converted to punycode ASCII string and stored

But there is a question, how to show DNS names to user (in UI or
dnsrecord-show/find):
* show them in punycode
* convert them to UTF-8 and show
* both ways
* add options to show them in UTF-8

I'll be thankful for your opinion.


We have a rule that all strings use UCS and that UCS be interchanged by
encoding UCS text in UTF-8. Therefore it seems to me the only time
punycode should ever exist is when it's necessary to encode/decode
punycode for dns operations. Since punycode is a standard Python codec
this should be trivial, you just need to determine where you do the
encode/decode (perhaps also validating user input can be successfully
encoded).

In LDAP the values need to be in punycode, so bind-dyndb-ldap can
process them.

This suggests the LDAP type conversion is the right location for
encode/decode.

IMO all layers above that -- API, CLI, WebUI -- should use Unicode,
except with the `--raw` flag.

The reason for this is that UTF-8 isn't as canonical a represenation of Punicode as, say, a DN object for DNs or a bool for boolean values. Admins might reasonably want to see the raw value.

Also, these values end up in DNs; I fear converting them at the LDAP wrapper level could open a can of worms. Do we have resources to give this the testing it needs?

I think converting them in the DNS plugin is the way to go.

--
PetrĀ³

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