[Pdns-users] returning a TXT record consisting only of digits from lua backend

[Peter van Dijk]

Hi Christof,

On Sun, 2021-08-01 at 21:49 +0200, Christof Meerwald via Pdns-users
wrote:
> Sorry, when saying lua backend I actually mean lua2backend:
> 
> pdns-backend-lua2 4.5.1-1pdns.focal
> 
> 
> > Better yet, can you show some config and code?
> 
> I was basically just testing my Let's Encrypt ACME-DNS verification:
> 
> https://svn.cmeerw.net/src/pdns-acme-backend/trunk/acmebackend.lua
> 
> which should just return the contents of a file as the TXT record.
> 
> Unfortunately, I was testing with a file containg "1234" - this didn't
> work, but when changing the file contents to something like "A1234"
> it suddenly started working.

I can confirm this is due to how lua_isnumber works. Perhaps you can
file a ticket so we can see if we can do something smarter there.

Changing line 11 (by my count) to 

	    data[#data + 1] = '"' .. l .. '"'

makes your code work for me.

Kind regards,
-- 
Peter van Dijk
PowerDNS.COM BV - https://www.powerdns.com/