## page was renamed from DNS/実装/python/dnslib/usage
== DNS/実装/python/dnslib/usage ==

=== RR (list) ===
いわゆるゾーン形式のテキストを読み込んで、dnslib.RRタイプのリストに変換できる。

It is also possible to create RRs from a string in zone file format
{{{
>>> RR.fromZone("abc.com IN A 1.2.3.4")
[<DNS RR: 'abc.com.' rtype=A rclass=IN ttl=0 rdata='1.2.3.4'>]
}}}
(Note: this produces a list of RRs which should be unpacked if being
passed to add_answer/add_auth/add_ar etc)
{{{
>>> q = DNSRecord.question("abc.com")
>>> a = q.reply()
>>> a.add_answer(*RR.fromZone("abc.com 60 A 1.2.3.4"))
>>> print(a)
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: ...
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;abc.com. IN A
;; ANSWER SECTION:
abc.com. 60 IN A 1.2.3.4
}}}

=== RR from zone file ===
The zone file can contain multiple entries and supports most of the normal
format defined in RFC1035 (specifically not $INCLUDE)
{{{
>>> z = '''
... $TTL 300
... $ORIGIN abc.com
...
... @ IN MX 10 mail.abc.com.
... www IN A 1.2.3.4
...     IN TXT "Some Text"
... mail IN CNAME www.abc.com.
... '''
>>> for rr in RR.fromZone(textwrap.dedent(z)):
... print(rr)
abc.com. 300 IN MX 10 mail.abc.com.
www.abc.com. 300 IN A 1.2.3.4
www.abc.com. 300 IN TXT "Some Text"
mail.abc.com. 300 IN CNAME www.abc.com.
}}}

=== reply from zone file (string) ===
It is also possible to create a reply from a string in zone file format:
{{{
>>> q = DNSRecord(q=DNSQuestion("abc.com",QTYPE.ANY))
>>> a = q.replyZone("abc.com 60 IN CNAME xxx.abc.com")
>>> print(a)
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: ...
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;abc.com. IN ANY
;; ANSWER SECTION:
abc.com. 60 IN CNAME xxx.abc.com.
}}}