Maintained by: NLnet Labs

Double quotes being added to return answers

Brad Bendy
Wed Sep 7 18:21:31 CEST 2016


Hi Wouter,

Thanks for the fast response.

That was the issue, if the string has no spaces and you add the quotes
then you get the literally quotes and slash in the return, so adding
that only when it has spaces works perfect.

Thanks again!

On Wed, Sep 7, 2016 at 12:04 AM, W.C.A. Wijngaards via Unbound-users
<unbound-users at unbound.net> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA256
>
> Hi Brad,
>
> Unbound internally deals with TXT records in wireformat, double quotes
> are not added or removed.  I think the quotes you see are because of
> multiple string sections in the TXT wireformat (each gets printed with
> quotes around them).
>
> The python .append function takes a text string and converts it to
> wireformat.  I think the lack of quotes in there makes the parser use
> whitespace to separate strings?  Try the append with quotes around
> your content:  "%s %d IN TXT \"%s\""  (if that is valid python to
> escape with \").
>
> Best regards, Wouter
>
> On 06/09/16 19:33, Brad Bendy via Unbound-users wrote:
>> Hi,
>>
>> We have the Python module setup to do lookups and return answers,
>> looks like everything is working except on a TXT record, unbound
>> is double quoting each group of text and this not a valid SPF entry
>> for example.
>>
>> "v=spf1" "include:_spf.mydom.com" "include:_spf.otherdom.com"
>> "~all" instead of just one set of quotes around the entire string.
>>
>> That's what im getting returned, on the python/unbound side we have
>> a simple msg.answer.append setup:
>>
>> msg = DNSMessage(qstate.qinfo.qname_str, RR_TYPE_TXT, RR_CLASS_IN,
>> PKT_QR | PKT_AA)
>>
>>
>> msg.answer.append("%s %d IN TXT %s" %
>> (qstate.qinfo.qname_str,txt['ttl'],str(txt['content'])))
>>
>> The txt['content'] source has no double quotes. I have tried
>> enclosing it in double quotes as well, same behavior. Python does
>> not appear to be adding the quotes, it's something on the unbound
>> side from what i can tell.
>>
>> I did some searching and I can't find anyone else who has seen
>> this issue, so not sure what else to try.
>>
>> Any pointers would be great.
>>
>> Thanks!
>>
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v2
>
> iQIcBAEBCAAGBQJXz7vwAAoJEJ9vHC1+BF+NelQQAKT75Rjvscf4GV4ZH1fzJArV
> ASltb3isAI+9mxb3jmfff4RGgtgAYeHhYvttJnwR/H1V7r84XMW0RQQEBgOEB9qW
> 4kMeZihDnfCbF/rSbGMVKFn6FTqX8j1gkwetWWxmhq3rMM7kNpkanpSakj74M8LO
> PSERlfuTFlY3n5WqOseL0/FN2PjVjE7J5O2qXDjHz0Q9YLITiUJnuBXF4d93ibt2
> giLpQoRf2Vd02fT7/30dgjux0Ao6mUj+rcPkIfG1FgcTsinol4mLsEe/YLwwADCX
> /HAeIF6F7REvi1oOasq35vCSLJvdOBLlqUwDs/yt4ZrmoAhSKx3cUTfu82u4/CQE
> aG2IaoKqL2EKBC2FVL31IgPJc7+Bhucr74djmtNVmhkTlNBG+aRNIRrKjg9yW4GP
> 4ORpY+QlLl8Du5qlhAFkVlht9S8O41YLf9Bd1BKzDzqv5Y/zeminL1Gu/elp1Bg8
> UFuqjvav7IPysZNUbphxA6lqdIXSG404lDZSVd7Q9dXorf6lTzXZD3g7iL6PxC5g
> yB500sybMab0e1EsB22dVgikcJqw9C3tVtSVWabX7AcpVm2DJEfomxDkMb3ArpK3
> dMx/ssFlWGOEA0OMQzeAndHmn3z0pGiFK0QsgUrMzy287BV/faUrxzB6x7Dy5QXX
> NTNkTXEs532wVmpscieZ
> =ei+X
> -----END PGP SIGNATURE-----