Hi Paul,
The single/double quotes mixup seems like a funny coincidence.
result.data.data includes the rdata which in this case (TXT) is the
character string(s). So also the length of the character string at the
start which in this case happens to be presented as '.
For this specific example (single character string) you can skip the
first byte but I believe the correct approach is to provide something
like 'as_txt_list()' method similar to the other methods to cleanly
handle the possible multiple length occurrences there.
For now something like the following would help you with parsing TXT
rdata (more or less similar to what is there now for domain names):
-------------------------------------------------------------------
def parse_txt_from_data(d):
if not d:
return []
res = []
dlen = len(d)
idx = 0
while (idx < dlen):
complen = ord(d[idx])
res.append(d[idx+1:idx+1+complen])
idx += complen + 1
return res
your_txt_records = map(lambda x:b''.join(parse_txt_from_data(x)),
result.data.data)
-------------------------------------------------------------------
Disclaimer, I haven't tested the above code but I'll try to properly
commit it soon-ish.
Best regards,
-- Yorgos
On 29/05/2023 20:42, Paul Wouters via Unbound-users wrote:
See:
$ dig _aiven-challenge.nohats.ca txt +short
"token=someveryrandomstring,expiry=never"
doing the same with unbound python:
import os
from unbound import ub_ctx,ub_strerror,RR_TYPE_TXT,RR_TYPE_A,RR_CLASS_IN
ctx = ub_ctx()
ctx.resolvconf("/etc/resolv.conf")
if os.path.isfile("/etc/unbound/dnssec-root.key"):
ctx.add_ta_file("/etc/unbound/dnssec-root.key") #read public keys
for DNSSEC verification
status, result = ctx.resolve(f"_aiven-challenge.nohats.ca.",
RR_TYPE_TXT, RR_CLASS_IN)
if status == 0 and result.havedata:
print(result.data.data)
$ python test.py [b"'token=someveryrandomstring,expiry=never"]
Note there is a single quote at the beginning of the string (and not at
the end)
This is with python3-unbound-1.17.1-1.fc37.x86_64
Paul
