[ViewVC] Contents of: cvs/cvsroot/EV-ADNS/README

NAME
    EV::ADNS -

SYNOPSIS
     use EV;
     use EV::ADNS;

     EV::ADNS::submit "example.com", EV::ADNS::r_a, 0, sub {
        my ($status, $expires, @a) = @_;
        warn $a[0]; # "127.13.166.3" etc.
     };

     EV::loop;

DESCRIPTION
    This is a simple interface to libadns (asynchronous dns) that integrates
    well and automatically into the EV event loop. The documentation for
    libadns is vital to understand this module, see
    <http://www.chiark.greenend.org.uk/~ian/adns/>.

    You can use it only with EV (directly or indirectly, e.g. via Glib::EV).
    Apart from loading and using the "submit" function you need not do
    anything (except run an EV event loop).

OVERVIEW
    All the constants/enums from adns.h are available in the EV::ADNS
    namespace, without the "adns_" prefix, e.g. "adns_r_a" becomes
    "EV::ADNS::r_a", "adns__qtf_deref" becomes "EV::ADNS::_qtf_deref" and so
    on.

FUNCTIONS
    $query = EV::ADNS::submit "domain", $rrtype, $flags, $cb
        Submits a new request to be handled. See the "adns_submit" C
        function description for more details. The function optionally
        returns a query object which can be used to cancel an in-progress
        request. You do not need to store the query object, even if you
        ignore it the query will proceed.

        The callback will be invoked with a result status, the time the
        resource record validity expires and zero or more resource records,
        one scalar per result record. Example:

           sub adns_cb {
              my ($status, $expires, @rr) = @_;
              if ($status == EV::ADNS::s_ok) {
                 use JSON::XS;
                 warn to_json \@rr;
              }
           }

        The format of result records varies considerably, here is some
        cursory documentation of how each record will look like, depending
        on the query type:

        EV::ADNS::rr_a
            An IPv4 address in dotted quad (string) form.

        adns_r_ns_raw, adns_r_cname, adns_r_ptr, adns_r_ptr_raw
            The resource record as a simple string.

        adns_r_txt
            An arrayref of strings.

        adns_r_ns
            A "host address", a hostname with any number of addresses (hint
            records).

            Currently only the hostname will be stored, so this is alway an
            arrayref with a single element of the hostname. Future versions
            might add additional address entries.

        adns_r_hinfo
            An arrayref consisting of the two strings.

        adns_r_rp, adns_r_rp_raw
            An arrayref with two strings.

        adns_r_mx
            An arrayref consisting of the priority and a "host address" (see
            "adns_r_ns"). Example:

               [10,"mail10.example.com"]

        adns_r_mx_raw:
            An arrayref consisting of the priority and the hostname, e.g.
            "[10, "mail.example.com"]".

        adns_r_soa, adns_r_soa_raw
            An arrayref consisting of the primary nameserver, admin name,
            serial, refresh, retry expire and minimum times, e.g.:

              ["ns.example.net","hostmaster@example.net",2000001102,86400,21600,2592000,172800]

            The "raw" form doesn't mangle the e-mail address.

        adns_r_srv_raw
            An arrayref consisting of the priority, weight, port and
            hostname, e.g.:

               [10,10,5060,"sip1.example.net"]

        adns_r_srv
            The same as "adns_r_srv_raw", but the hostname is replaced by a
            "host address" (see "adns_r_ns").

        adns_r_unknown
            A single octet string with the raw contents.

        anything else
            Currently "undef".

    $query->cancel
        Cancels a request that is in progress.

SEE ALSO
    EV, Net::ADNS another interface to adns, maybe better, but without real
    support to integrate it into other event loops.

AUTHOR
     Marc Lehmann <schmorp@schmorp.de>
     http://home.schmorp.de/

Revision:	1.2
Committed:	Sat Dec 1 22:36:10 2007 UTC (16 years, 7 months ago) by root
Branch:	MAIN
Changes since 1.1:	+108 -42 lines
Log Message:	* empty log message *
#	Content
1	NAME
2	EV::ADNS -
3
4	SYNOPSIS
5	use EV;
6	use EV::ADNS;
7
8	EV::ADNS::submit "example.com", EV::ADNS::r_a, 0, sub {
9	my ($status, $expires, @a) = @_;
10	warn $a[0]; # "127.13.166.3" etc.
11	};
12
13	EV::loop;
14
15	DESCRIPTION
16	This is a simple interface to libadns (asynchronous dns) that integrates
17	well and automatically into the EV event loop. The documentation for
18	libadns is vital to understand this module, see
19	<http://www.chiark.greenend.org.uk/~ian/adns/>.
20
21	You can use it only with EV (directly or indirectly, e.g. via Glib::EV).
22	Apart from loading and using the "submit" function you need not do
23	anything (except run an EV event loop).
24
25	OVERVIEW
26	All the constants/enums from adns.h are available in the EV::ADNS
27	namespace, without the "adns_" prefix, e.g. "adns_r_a" becomes
28	"EV::ADNS::r_a", "adns__qtf_deref" becomes "EV::ADNS::_qtf_deref" and so
29	on.
30
31	FUNCTIONS
32	$query = EV::ADNS::submit "domain", $rrtype, $flags, $cb
33	Submits a new request to be handled. See the "adns_submit" C
34	function description for more details. The function optionally
35	returns a query object which can be used to cancel an in-progress
36	request. You do not need to store the query object, even if you
37	ignore it the query will proceed.
38
39	The callback will be invoked with a result status, the time the
40	resource record validity expires and zero or more resource records,
41	one scalar per result record. Example:
42
43	sub adns_cb {
44	my ($status, $expires, @rr) = @_;
45	if ($status == EV::ADNS::s_ok) {
46	use JSON::XS;
47	warn to_json \@rr;
48	}
49	}
50
51	The format of result records varies considerably, here is some
52	cursory documentation of how each record will look like, depending
53	on the query type:
54
55	EV::ADNS::rr_a
56	An IPv4 address in dotted quad (string) form.
57
58	adns_r_ns_raw, adns_r_cname, adns_r_ptr, adns_r_ptr_raw
59	The resource record as a simple string.
60
61	adns_r_txt
62	An arrayref of strings.
63
64	adns_r_ns
65	A "host address", a hostname with any number of addresses (hint
66	records).
67
68	Currently only the hostname will be stored, so this is alway an
69	arrayref with a single element of the hostname. Future versions
70	might add additional address entries.
71
72	adns_r_hinfo
73	An arrayref consisting of the two strings.
74
75	adns_r_rp, adns_r_rp_raw
76	An arrayref with two strings.
77
78	adns_r_mx
79	An arrayref consisting of the priority and a "host address" (see
80	"adns_r_ns"). Example:
81
82	[10,"mail10.example.com"]
83
84	adns_r_mx_raw:
85	An arrayref consisting of the priority and the hostname, e.g.
86	"[10, "mail.example.com"]".
87
88	adns_r_soa, adns_r_soa_raw
89	An arrayref consisting of the primary nameserver, admin name,
90	serial, refresh, retry expire and minimum times, e.g.:
91
92	["ns.example.net","hostmaster@example.net",2000001102,86400,21600,2592000,172800]
93
94	The "raw" form doesn't mangle the e-mail address.
95
96	adns_r_srv_raw
97	An arrayref consisting of the priority, weight, port and
98	hostname, e.g.:
99
100	[10,10,5060,"sip1.example.net"]
101
102	adns_r_srv
103	The same as "adns_r_srv_raw", but the hostname is replaced by a
104	"host address" (see "adns_r_ns").
105
106	adns_r_unknown
107	A single octet string with the raw contents.
108
109	anything else
110	Currently "undef".
111
112	$query->cancel
113	Cancels a request that is in progress.
114
115	SEE ALSO
116	EV, Net::ADNS another interface to adns, maybe better, but without real
117	support to integrate it into other event loops.
118
119	AUTHOR
120	Marc Lehmann <schmorp@schmorp.de>
121	http://home.schmorp.de/
122