お前、誰よ
って思ったら WHOIS 引きますよね? 例えば apache のログ見てて「何このアドレス?」って思ったら当然のごとく whois でもって接続元がどこの誰だか調べてやるわけです。誰だ!
$ whois 59.106.108.77 % [whois.apnic.net node-3] % Whois data copyright terms http://www.apnic.net/db/dbcopyright.html inetnum: 59.106.0.0 - 59.106.255.255 netname: SAKURA descr: SAKURA Internet Inc. descr: 1-8-14, Minami Honmachi, Chuo-ku, Osaka 541-0054, Japan country: JP admin-c: JNIC1-AP tech-c: JNIC1-AP status: ALLOCATED PORTABLE remarks: Email address for spam or abuse complaints : support@sakura.ad.jp mnt-by: MAINT-JPNIC mnt-lower: MAINT-JPNIC changed: hm-changed@apnic.net 20041013 changed: ip-apnic@nic.ad.jp 20070523 source: APNIC role: Japan Network Information Center address: Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda address: Chiyoda-ku, Tokyo 101-0047, Japan country: JP phone: +81-3-5297-2311 fax-no: +81-3-5297-2312 e-mail: hostmaster@nic.ad.jp admin-c: JI13-AP tech-c: JE53-AP nic-hdl: JNIC1-AP mnt-by: MAINT-JPNIC changed: hm-changed@apnic.net 20041222 changed: hm-changed@apnic.net 20050324 changed: ip-apnic@nic.ad.jp 20051027 source: APNIC inetnum: 59.106.108.64 - 59.106.108.127 netname: HATENA descr: Hatena Co.,Ltd. country: JP admin-c: ND406JP tech-c: ND406JP remarks: This information has been partially mirrored by APNIC from remarks: JPNIC. To obtain more specific information, please use the remarks: JPNIC WHOIS Gateway at remarks: http://www.nic.ad.jp/en/db/whois/en-gateway.html or remarks: whois.nic.ad.jp for WHOIS client. (The WHOIS client remarks: defaults to Japanese output, use the /e switch for English remarks: output) changed: apnic-ftp@nic.ad.jp 20061220 source: JPNIC
「はてなかー」って思ったりするわけです（フィクションです）
IP address で引いてみましたけどドメイン名でも引けちゃいます
$ whois hatena.ne.jp | nkf -w8 [ JPRS database provides information on network administration. Its use is ] [ restricted to network administration purposes. For further information, ] [ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ] [ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ] Domain Information: [ドメイン情報] a. [ドメイン名] HATENA.NE.JP b. [ねっとわーくさーびすめい] はてな c. [ネットワークサービス名] はてな d. [Network Service Name] hatena k. [組織種別] ネットワークサービス l. [Organization Type] Network Service m. [登録担当者] JK960JP n. [技術連絡担当者] JK961JP n. [技術連絡担当者] DT033JP p. [ネームサーバ] ns0.future-s.com p. [ネームサーバ] ns1.future-s.com s. [署名鍵] [状態] Connected (2011/02/28) [登録年月日] 2001/02/22 [接続年月日] 2001/05/21 [最終更新] 2010/03/01 01:24:24 (JST) $ whois -h whois.jprs.jp JK960JP | nkf -w8 [ JPRS database provides information on network administration. Its use is ] [ restricted to network administration purposes. For further information, ] [ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ] [ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ] Contact Information: [担当者情報] a. [JPNICハンドル] JK960JP b. [氏名] 近藤 淳也 c. [Last, First] Kondo, Junya d. [電子メイル] admin@hatena.ne.jp f. [組織名] 株式会社 はてな g. [Organization] Hatena Co., Ltd. k. [部署] l. [Division] m. [肩書] n. [Title] o. [電話番号] p. [FAX番号] y. [通知アドレス] jpnic-apply@future-s.com [最終更新] 2010/12/13 10:28:43 (JST) form@dom.jprs.jp
で、思うわけです。「何だこの何でもありプロトコルは、[担当者情報] って属性JPバリバリやんけ」と。
WHOIS - Wikipedia によると RFC の 812, 954 を obsolete にして http://www.rfc-editor.org/rfc/rfc3912.txt が最新の RFC みたいなので眺めてみたところ
For historic reasons, WHOIS lacks many of the protocol design
attributes, for example internationalisation and strong security,
that would be expected from any recently-designed IETF protocol.
This document does not attempt to rectify any of those shortcomings.
Instead, this memo documents the WHOIS protocol as it is.
レガシーを気持ち良いくらいに引きずってる感じが臭ってきました。
リクエストの投げ方にしても
The WHOIS client makes a text request to the WHOIS server,
then the WHOIS server replies with text content. All requests are
terminated with ASCII CR and then ASCII LF.
すげーシンプル。コレくらいなら
>>> import socket >>> sock = socket.socket() >>> sock.connect(('whois.jprs.jp', 43)) >>> sock.send('hatena.ne.jp\n\r') 14 >>> print(sock.recv(10240).decode('iso-2022-jp')) [ JPRS database provides information on network administration. Its use is ] [ restricted to network administration purposes. For further information, ] [ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ] [ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ] Domain Information: [ドメイン情報] a. [ドメイン名] HATENA.NE.JP b. [ねっとわーくさーびすめい] はてな c. [ネットワークサービス名] はてな d. [Network Service Name] hatena k. [組織種別] ネットワークサービス l. [Organization Type] Network Service m. [登録担当者] JK960JP n. [技術連絡担当者] JK961JP n. [技術連絡担当者] DT033JP p. [ネームサーバ] ns0.future-s.com p. [ネームサーバ] ns1.future-s.com s. [署名鍵] [状態] Connected (2011/02/28) [登録年月日] 2001/02/22 [接続年月日] 2001/05/21 [最終更新] 2010/03/01 01:24:24 (JST) >>>
簡単。
でもこれ、パースしなさいって言われると途端に頭抱えますね。.JP はまだいいんだろうけど、世界中の WHOIS サーバ相手にすると思うと．．．