# README
net/textprotoのサンプル
net/textproto パッケージは、テキストプロトコルを扱う通信処理を処理しやすくするパッケージ。
Package textproto implements generic support for text-based request/response protocols in the style of HTTP, NNTP, and SMTP.
(textprotoパッケージは、HTTP、NNTP、SMTPスタイルのテキストベースのリクエスト/レスポンスプロトコルの汎用サポートを実装します。)
実行
先に「ターミナル２」を起動しておき、その後に「ターミナル１」を実行。
ターミナル１
$ task
task: [build] go build -o app .
task: [run] ./app -server &
task: [run] sleep 1
task: [run] ./app
200 ようこそ! コマンド：GET, SET, QUIT
< SET Hello World
200 VALUE SET SUCCESSFULLY
< GET Hello
200 World
< QUIT
200 BYE
ターミナル２
$ task watch
task: [watch] sudo tcpdump -i lo -n 'tcp port 8888' -S -X
tcpdump: verbose output suppressed, use -v[v]... for full protocol decode
listening on lo, link-type EN10MB (Ethernet), snapshot length 262144 bytes
09:16:24.913973 IP 127.0.0.1.53082 > 127.0.0.1.8888: Flags [S], seq 3624143825, win 43690, options [mss 65495,sackOK,TS val 316896963 ecr 0,nop,wscale 7], length 0
0x0000: 4500 003c f12b 4000 4006 4b8e 7f00 0001 E..<.+@[email protected].....
0x0010: 7f00 0001 cf5a 22b8 d804 0bd1 0000 0000 .....Z".........
0x0020: a002 aaaa fe30 0000 0204 ffd7 0402 080a .....0..........
0x0030: 12e3 76c3 0000 0000 0103 0307 ..v.........
09:16:24.913989 IP 127.0.0.1.8888 > 127.0.0.1.53082: Flags [S.], seq 3473127062, ack 3624143826, win 43690, options [mss 65495,sackOK,TS val 316896963 ecr 316896963,nop,wscale 7], length 0
0x0000: 4500 003c 0000 4000 4006 3cba 7f00 0001 E..<..@.@.<.....
0x0010: 7f00 0001 22b8 cf5a cf03 b696 d804 0bd2 ...."..Z........
0x0020: a012 aaaa fe30 0000 0204 ffd7 0402 080a .....0..........
0x0030: 12e3 76c3 12e3 76c3 0103 0307 ..v...v.....
09:16:24.913998 IP 127.0.0.1.53082 > 127.0.0.1.8888: Flags [.], ack 3473127063, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 0
0x0000: 4500 0034 f12c 4000 4006 4b95 7f00 0001 E..4.,@[email protected].....
0x0010: 7f00 0001 cf5a 22b8 d804 0bd2 cf03 b697 .....Z".........
0x0020: 8010 0156 fe28 0000 0101 080a 12e3 76c3 ...V.(........v.
0x0030: 12e3 76c3 ..v.
09:16:24.914117 IP 127.0.0.1.8888 > 127.0.0.1.53082: Flags [P.], seq 3473127063:3473127112, ack 3624143826, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 49
0x0000: 4500 0065 abdc 4000 4006 90b4 7f00 0001 E..e..@.@.......
0x0010: 7f00 0001 22b8 cf5a cf03 b697 d804 0bd2 ...."..Z........
0x0020: 8018 0156 fe59 0000 0101 080a 12e3 76c3 ...V.Y........v.
0x0030: 12e3 76c3 3230 3020 e382 88e3 8186 e381 ..v.200.........
0x0040: 93e3 819d 2120 e382 b3e3 839e e383 b3e3 ....!...........
0x0050: 8389 efbc 9a47 4554 2c20 5345 542c 2051 .....GET,.SET,.Q
0x0060: 5549 540d 0a UIT..
09:16:24.914128 IP 127.0.0.1.53082 > 127.0.0.1.8888: Flags [.], ack 3473127112, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 0
0x0000: 4500 0034 f12d 4000 4006 4b94 7f00 0001 E..4.-@[email protected].....
0x0010: 7f00 0001 cf5a 22b8 d804 0bd2 cf03 b6c8 .....Z".........
0x0020: 8010 0156 fe28 0000 0101 080a 12e3 76c3 ...V.(........v.
0x0030: 12e3 76c3 ..v.
09:16:24.914203 IP 127.0.0.1.53082 > 127.0.0.1.8888: Flags [P.], seq 3624143826:3624143843, ack 3473127112, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 17
0x0000: 4500 0045 f12e 4000 4006 4b82 7f00 0001 E..E..@[email protected].....
0x0010: 7f00 0001 cf5a 22b8 d804 0bd2 cf03 b6c8 .....Z".........
0x0020: 8018 0156 fe39 0000 0101 080a 12e3 76c3 ...V.9........v.
0x0030: 12e3 76c3 5345 5420 4865 6c6c 6f20 576f ..v.SET.Hello.Wo
0x0040: 726c 640d 0a rld..
09:16:24.914212 IP 127.0.0.1.8888 > 127.0.0.1.53082: Flags [.], ack 3624143843, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 0
0x0000: 4500 0034 abdd 4000 4006 90e4 7f00 0001 E..4..@.@.......
0x0010: 7f00 0001 22b8 cf5a cf03 b6c8 d804 0be3 ...."..Z........
0x0020: 8010 0156 fe28 0000 0101 080a 12e3 76c3 ...V.(........v.
0x0030: 12e3 76c3 ..v.
09:16:24.914248 IP 127.0.0.1.8888 > 127.0.0.1.53082: Flags [P.], seq 3473127112:3473127140, ack 3624143843, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 28
0x0000: 4500 0050 abde 4000 4006 90c7 7f00 0001 E..P..@.@.......
0x0010: 7f00 0001 22b8 cf5a cf03 b6c8 d804 0be3 ...."..Z........
0x0020: 8018 0156 fe44 0000 0101 080a 12e3 76c3 ...V.D........v.
0x0030: 12e3 76c3 3230 3020 5641 4c55 4520 5345 ..v.200.VALUE.SE
0x0040: 5420 5355 4343 4553 5346 554c 4c59 0d0a T.SUCCESSFULLY..
09:16:24.914285 IP 127.0.0.1.53082 > 127.0.0.1.8888: Flags [P.], seq 3624143843:3624143854, ack 3473127140, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 11
0x0000: 4500 003f f12f 4000 4006 4b87 7f00 0001 E..?./@[email protected].....
0x0010: 7f00 0001 cf5a 22b8 d804 0be3 cf03 b6e4 .....Z".........
0x0020: 8018 0156 fe33 0000 0101 080a 12e3 76c3 ...V.3........v.
0x0030: 12e3 76c3 4745 5420 4865 6c6c 6f0d 0a ..v.GET.Hello..
09:16:24.914327 IP 127.0.0.1.8888 > 127.0.0.1.53082: Flags [P.], seq 3473127140:3473127151, ack 3624143854, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 11
0x0000: 4500 003f abdf 4000 4006 90d7 7f00 0001 E..?..@.@.......
0x0010: 7f00 0001 22b8 cf5a cf03 b6e4 d804 0bee ...."..Z........
0x0020: 8018 0156 fe33 0000 0101 080a 12e3 76c3 ...V.3........v.
0x0030: 12e3 76c3 3230 3020 576f 726c 640d 0a ..v.200.World..
09:16:24.914360 IP 127.0.0.1.53082 > 127.0.0.1.8888: Flags [P.], seq 3624143854:3624143860, ack 3473127151, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 6
0x0000: 4500 003a f130 4000 4006 4b8b 7f00 0001 E..:.0@[email protected].....
0x0010: 7f00 0001 cf5a 22b8 d804 0bee cf03 b6ef .....Z".........
0x0020: 8018 0156 fe2e 0000 0101 080a 12e3 76c3 ...V..........v.
0x0030: 12e3 76c3 5155 4954 0d0a ..v.QUIT..
09:16:24.914391 IP 127.0.0.1.8888 > 127.0.0.1.53082: Flags [P.], seq 3473127151:3473127160, ack 3624143860, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 9
0x0000: 4500 003d abe0 4000 4006 90d8 7f00 0001 E..=..@.@.......
0x0010: 7f00 0001 22b8 cf5a cf03 b6ef d804 0bf4 ...."..Z........
0x0020: 8018 0156 fe31 0000 0101 080a 12e3 76c3 ...V.1........v.
0x0030: 12e3 76c3 3230 3020 4259 450d 0a ..v.200.BYE..
09:16:24.914412 IP 127.0.0.1.8888 > 127.0.0.1.53082: Flags [F.], seq 3473127160, ack 3624143860, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 0
0x0000: 4500 0034 abe1 4000 4006 90e0 7f00 0001 E..4..@.@.......
0x0010: 7f00 0001 22b8 cf5a cf03 b6f8 d804 0bf4 ...."..Z........
0x0020: 8011 0156 fe28 0000 0101 080a 12e3 76c3 ...V.(........v.
0x0030: 12e3 76c3 ..v.
09:16:24.914427 IP 127.0.0.1.53082 > 127.0.0.1.8888: Flags [F.], seq 3624143860, ack 3473127161, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 0
0x0000: 4500 0034 f131 4000 4006 4b90 7f00 0001 E..4.1@[email protected].....
0x0010: 7f00 0001 cf5a 22b8 d804 0bf4 cf03 b6f9 .....Z".........
0x0020: 8011 0156 fe28 0000 0101 080a 12e3 76c3 ...V.(........v.
0x0030: 12e3 76c3 ..v.
09:16:24.914440 IP 127.0.0.1.8888 > 127.0.0.1.53082: Flags [.], ack 3624143861, win 342, options [nop,nop,TS val 316896963 ecr 316896963], length 0
0x0000: 4500 0034 abe2 4000 4006 90df 7f00 0001 E..4..@.@.......
0x0010: 7f00 0001 22b8 cf5a cf03 b6f9 d804 0bf5 ...."..Z........
0x0020: 8010 0156 fe28 0000 0101 080a 12e3 76c3 ...V.(........v.
0x0030: 12e3 76c3 ..v.
^C
15 packets captured
30 packets received by filter
0 packets dropped by kernel