Gunosy.go #6 net, net/mail, net/smtp, net/textproto, net/rpc

(VOPTZHP OFU\IUUQ VSMҎ֎^ ࠇ઒༸

લޱ্ w ࠓ೔঺հ͢Δύοέʔδ w OFU w OFUNBJM w OFUTNUQ w
OFUUFYUQSPUP w OFUSQD w OFUSQDKTPOSQD w ஫ҙ఺ w ࡌ͍ͤͯΔίʔυྫͰ͸ΤϥʔॲཧͳͲΛলུ͍ͯ͠·͢ w ίϐϖʹ͸஫ҙ

OFUύοέʔδ w IUUQHPMBOHKQQLHOFU w ωοτϫʔΫ*0Λߦ͏جຊతͳϝιου΍ܕ͕ἧ͍ͬͯΔ w 5$1*1 6%1 %/4 6OJYEPNBJOTPDLFUT
w جຊతͳΠϯλʔϑΣʔε͚ͩͰྑ͚Ε͹ɺ%JBM -JTUFO "DDFQUΛ࢖͓͚ͬͯ͹ɺ0, conn, err := net.Dial("tcp", "google.com:80") fmt.Fprintf(conn, "GET / HTTP/1.0\r\n\r\n") status, err := bufio.NewReader(conn).ReadString('\n') // ... ΫϥΠΞϯτଆɿ αʔόʔଆɿ ln, err := net.Listen("tcp", ":8080") for { conn, err := ln.Accept() go handleConnection(conn) }

ྫɿΤίʔαʔόʔ w αʔόʔ͕MJTUFO͍ͯͯ͠ɺड͚औͬͨϝοηʔδΛͦͷ··ฦ͚ͩ͢ w αʔόʔଆͷίʔυɿIUUQQMBZHPMBOHPSHQ$HU%"S4G w ΫϥΠΞϯτଆͷίʔυɿIUUQQMBZHPMBOHPSHQFF5JSW% w σϞ

OFUύοέʔδ w جຊ w UZQF$POO w GVOD%JBM OFUXPSL BEESFTTTUSJOH
$POO FSSPS w GVOD%JBM5JNFPVU OFUXPSL BEESFTTTUSJOH UJNFPVUUJNF%VSBUJPO $POO FSSPS w GVOD'JMF$POO G PT'JMF D$POO FSSFSSPS w GVOD1JQF $POO $POO w UZQF%JBMFS w GVOD E %JBMFS %JBM OFUXPSL BEESFTTTUSJOH $POO FSSPS w UZQF-JTUFOFS w GVOD'JMF-JTUFOFS G PT'JMF M-JTUFOFS FSSFSSPS w GVOD-JTUFO OFU MBEESTUSJOH -JTUFOFS FSSPS

OFUύοέʔδ w ۩ମతͳܕ w *1 5$1 6%1 6OJY w
YY"EES w YY$POO w YY-JTUFOFS

OFUύοέʔδ w γεςϜ৘ใ w GVOD*OUFSGBDF"EEST <>"EES FSSPS
w GVOD*OUFSGBDFT <>*OUFSGBDF FSSPS w UZQF"EES w UZQF*OUFSGBDF w UZQF)BSEXBSF"EES

OFUύοέʔδ w ϗετɾϙʔτͱจࣈྻͷม׵ w GVOD+PJO)PTU1PSU IPTU QPSUTUSJOH TUSJOH w
GVOD4QMJU)PTU1PSU IPTUQPSUTUSJOH IPTU QPSUTUSJOH FSSFSSPS w ໊લղܾ w GVOD-PPLVQ"EES BEESTUSJOH OBNF<>TUSJOH FSSFSSPS w GVOD-PPLVQ$/".& OBNFTUSJOH DOBNFTUSJOH FSSFSSPS w GVOD-PPLVQ)PTU IPTUTUSJOH BEEST<>TUSJOH FSSFSSPS w GVOD-PPLVQ*1 IPTUTUSJOH BEEST<>*1 FSSFSSPS w GVOD-PPLVQ.9 OBNFTUSJOH NY<> .9 FSSFSSPS w GVOD-PPLVQ/4 OBNFTUSJOH OT<> /4 FSSFSSPS w GVOD-PPLVQ1PSU OFUXPSL TFSWJDFTUSJOH QPSUJOU FSSFSSPS w GVOD-PPLVQ437 TFSWJDF QSPUP OBNFTUSJOH DOBNFTUSJOH BEEST<> 437 FSSFSSPS w GVOD-PPLVQ595 OBNFTUSJOH UYU<>TUSJOH FSSFSSPS

OFUNBJMύοέʔδ w ϝʔϧͷϝοηʔδΛಡΉͨΊͷύοέʔδɻ3'$ʹै͏ɻ w GVOE1BSTF"EESFTT-JTU MJTUTUSJOH <> "EESFTT FSSPS
w UZQF"EESFTT w GVOD1BSTF"EESFTT BEESFTTTUSJOH "EESFTT FSSPS w GVOD B "EESFTT 4USJOH TUSJOH w UZQF)FBEFS w GVOD I)FBEFS "EESFTT-JTU LFZTUSJOH <> "EESFTT FSSPS w GVOD I)FBEFS %BUF UJNF5JNF FSSPS w GVOD I)FBEFS (FU LFZTUSJOH TUSJOH w UZQF.FTTBHF w GVOD3FBE.FTTBHF SJP3FBEFS NTH .FTTBHF FSSFSSPS w جຊతͳྲྀΕ͸NBJM3FBE.FTTBHFͰϝοηʔδΛಡΈࠐΜͰɺ.FTTBHF#PEZͰຊจʹɺ.FTTBHF)FBEFSͰϔομ ʹΞΫηε͢Δɻ

OFUTNUQύοέʔδ w 3'$Ͱఆٛ͞Ε͍ͯΔ4.51 4JNQMF.BJM 5SBOTGFS1SPUPDPM Λ࣮૷͍ͯ͠Δ w ࢖͍ํ Τϥʔॲཧ͸Ұ෦লུ͍ͯ͠·͢
// Connect to the remote SMTP server. c, err := smtp.Dial("mail.example.com:25") ! // Set the sender and recipient first if err := c.Mail("[email protected]"); err != nil { log.Fatal(err) } if err := c.Rcpt("[email protected]"); err != nil { log.Fatal(err) } ! // Send the email body. wc, err := c.Data() _, err = fmt.Fprintf(wc, "This is the email body") err = wc.Close() ! // Send the QUIT command and close the connection. err = c.Quit()

OFUUFYUQSPUPύοέʔδ w )551 //51 4.51ͱ͍ͬͨςΩετϕʔεͷϓϩτίϧʹศརͳϢʔςΟϦςΟΛूΊͨύοέʔδ w &SSPS  ͷΑ͏ͳ਺ࣈͰද͞ΕΔΤϥʔ w 1JQFMJOF 
ෳ਺ͷΫϥΠΞϯτ͕ίωΫγϣϯΛڞ༗͢ΔͨΊͷ࢓૊Έ w 3FBEFS  ελʔλείʔυɺϔομɺޙଓߦ͕ۭനͰΠϯσϯτ͞ΕͯυοτͰऴΘΔຊจΛѻ͑Δ w 8SJUFS  ্هͷϑΥʔϚοτʹैͬͯϝοηʔδΛॻ͚Δ 1JQFMJOFͷ࢖͍ํɿ id := p.Next() // take a number ! p.StartRequest(id) // wait for turn to send request «send request» p.EndRequest(id) // notify Pipeline that request is sent ! p.StartResponse(id) // wait for turn to read response «read response» p.EndResponse(id) // notify Pipeline that response is read

OFUXPSLSQDύοέʔδ w 31$ 3FNPUF1SPDFEVSF$BMM Λߦ͏ͨΊͷύοέʔδ w αʔόʔଆͰొ࿥ͨ͠ΦϒδΣΫτͷϝιουΛωοτϫʔΫӽ͠ʹݺ΂ΔΑ͏ʹͳΔ w ొ࿥ͨ͠ΦϒδΣΫτͷܕ໊͕αʔϏε໊ʹͳΔ w
ෳ਺ͷಉҰܕͷΦϒδΣΫτΛొ࿥͢Δ͜ͱ͸Ͱ͖ͳ͍ w ొ࿥ͨ͠ΦϒδΣΫτͷϝιουͷ͏ͪɺҎԼͷ৚݅Λຬͨͨ͠ϝιου͕ެ։͞ΕΔ w ϝιου͕ެ։͞Ε͍ͯΔ େจࣈͰ࢝·͍ͬͯΔ w ͭͷҾ਺Λ࣋ͪɺͲͪΒͷܕ΋ެ։͞Ε͍ͯΔ͔ϏϧτΠϯܕͰ͋Δ w ൪໨ͷҾ਺͸ϙΠϯλܕͰ͋Δ w ໭Γ஋͕FSSPSܕͰ͋Δ w ཁ͢ΔʹɺҎԼͷܗࣜͰ͋Ε͹ྑ͍ɻ ! w ஫ҙɿ5 5 5͸FODPEJOHHPCͰγϦΞϥΠζσγϦΞϥΠζͰ͖ͳ͚Ε͹ͳΒͳ͍ কདྷ͸؇࿨͞ΕΔ͔΋ w +40/ͳΒOFUXPSLSQDKTPOSQDύοέʔδ͕͋Δ w ࠷ॳͷҾ਺͕ϦΫΤετͷύϥϝʔλͰɺ൪໨ͷҾ਺͕Ϩεϙϯεʹ૬౰͢Δ func (t *T) MethodName(argType T1, replyType *T2) error

࢖͍ํ w αʔόʔଆ w ΦϒδΣΫτΛొ࿥ͨ͠ޙʹ4FSWF$POOΛݺͿɻίʔσοΫ͸HPC͕࢖ΘΕΔ w HPCҎ֎Λ࢖͏ͳΒɺ4FSWF$PEFDΛ࢖͏ɻ w )551Λ࢖͏ͳΒɺ)BOEMF)551ΛݺΜͰϋϯυϥΛొ࿥ͨ͠ޙʹɺIUUQ4FSWFΛݺ Ϳ
w ΫϥΠΞϯτଆ w ίωΫγϣϯΛཱ֬ͨ͋͠ͱʹ/FX$MJFOUΛݺͿɻ%JBMϝιουΛ࢖͏ͱ྆ํ͕ग़དྷ ͯศརɻ w $MJFOUΦϒδΣΫτͷ$BMMϝιουΛݺͿͱಉظతʹɺ(PϝιουΛݺͿͱඇಉظత ʹϨεϙϯεΛॲཧ͢Δ w ໌ࣔతʹίʔσοΫ͕ࢦఆ͞Ε͍ͯͳ͍ͳΒɺFODPEJOHHPC͕࢖ΘΕΔ

αϯϓϧ αʔόʔଆɿ type Args struct { A,
B int } type Quotient struct { Quo, Rem int } type Arith int func (t *Arith) Multiply(args *Args, reply *int) error { *reply = args.A * args.B return nil } func (t *Arith) Divide(args *Args, quo *Quotient) error { if args.B == 0 { return errors.New("divide by zero") } quo.Quo = args.A / args.B quo.Rem = args.A % args.B return nil } arith := new(Arith) rpc.Register(arith) rpc.HandleHTTP() l, e := net.Listen("tcp", ":1234") if e != nil { log.Fatal("listen error:", e) } go http.Serve(l, nil)

αϯϓϧ ΫϥΠΞϯτଆɿ client, err := rpc.DialHTTP("tcp", serverAddress + ":1234")
if err != nil { log.Fatal("dialing:", err) } args := &server.Args{7,8} var reply int err = client.Call("Arith.Multiply", args, &reply) if err != nil { log.Fatal("arith error:", err) } fmt.Printf("Arith: %d*%d=%d", args.A, args.B, reply) // Asynchronous call quotient := new(Quotient) divCall := client.Go("Arith.Divide", args, quotient, nil) replyCall := <-‐divCall.Done // will be equal to divCall // check errors, print, etc. ಉظॲཧɿ ඇಉظॲཧɿ

OFUSQDKTPOSQDύοέʔδ w ίʔσοΫʹHPCͰ͸ͳ͘ɺKTPOΛ࢖͏ͨΊͷύοέʔδ w +40/31$ͷ࢓༷ͱ͸ؔ܎ͳ͍ɻͨ·ͨ·໊લ͕KTPOSQDͳ͚ͩɻ  “jsonrpc was designed to work
with net/rpc not the other way around.”  “the only thing they did wrong was call it "jsonrpc". :-)”  - Andre Moraes (https://groups.google.com/forum/#!topic/golang-nuts/SGXmAvzD7DM) w (PSJMMB͸+40/31$ʹ४ڌ͍ͯ͠ΔΒ͍͠  IUUQXXXHPSJMMBUPPMLJUPSHQLHSQDKTPO arith := new(data.Arith) ! rpc.Register(arith) rpc.HandleHTTP() ! l, err := net.Listen("tcp", ":1234") for { conn, err := l.Accept() if err != nil { log.Fatal(err) } go jsonrpc.ServeConn(conn) } αʔόʔଆɿ ΫϥΠΞϯτଆɿ conn, err := net.Dial("tcp", ":1234") defer conn.Close() client := jsonrpc.NewClient(conn) ! // Synchronous call args := &data.Args{7, 8} var reply int err = client.Call("Arith.Multiply", args, &reply) fmt.Printf("Arith: %d*%d=%d", args.A, args.B, reply)

Gunosy.go #6 net, net/mail, net/smtp, net/textp...

Gunosy.go #6 net, net/mail, net/smtp, net/textproto, net/rpc

Hiroshi Kurokawa

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(VOPTZHP OFU\IUUQ VSMҎ֎^ ࠇ઒༸

લޱ্ w ࠓ೔঺հ͢Δύοέʔδ w OFU w OFUNBJM w OFUTNUQ w

OFUύοέʔδ w IUUQHPMBOHKQQLHOFU w ωοτϫʔΫ0Λߦ͏جຊతͳϝιου΍ܕ͕ἧ͍ͬͯΔ w 5$11 6%1 %/4 6OJYEPNBJOTPDLFUT

ྫɿΤίʔαʔόʔ w αʔόʔ͕MJTUFO͍ͯͯ͠ɺड͚औͬͨϝοηʔδΛͦͷ··ฦ͚ͩ͢ w αʔόʔଆͷίʔυɿIUUQQMBZHPMBOHPSHQ$HU%"S4G w ΫϥΠΞϯτଆͷίʔυɿIUUQQMBZHPMBOHPSHQFF5JSW% w σϞ

OFUύοέʔδ w جຊ w UZQF$POO w GVOD%JBM OFUXPSL BEESFTTTUSJOH

OFUύοέʔδ w ۩ମతͳܕ w *1 5$1 6%1 6OJY w

OFUύοέʔδ w γεςϜ৘ใ w GVOD*OUFSGBDF"EEST <>"EES FSSPS

OFUύοέʔδ w ϗετɾϙʔτͱจࣈྻͷม׵ w GVOD+PJO)PTU1PSU IPTU QPSUTUSJOH TUSJOH w

OFUNBJMύοέʔδ w ϝʔϧͷϝοηʔδΛಡΉͨΊͷύοέʔδɻ3'$ʹै͏ɻ w GVOE1BSTF"EESFTT-JTU MJTUTUSJOH <> "EESFTT FSSPS

OFUTNUQύοέʔδ w 3'$Ͱఆٛ͞Ε͍ͯΔ4.51 4JNQMF.BJM 5SBOTGFS1SPUPDPM Λ࣮૷͍ͯ͠Δ w ࢖͍ํ Τϥʔॲཧ͸Ұ෦লུ͍ͯ͠·͢

OFUUFYUQSPUPύοέʔδ w )551 //51 4.51ͱ͍ͬͨςΩετϕʔεͷϓϩτίϧʹศརͳϢʔςΟϦςΟΛूΊͨύοέʔδ w &SSPS  ͷΑ͏ͳ਺ࣈͰද͞ΕΔΤϥʔ w 1JQFMJOF

OFUXPSLSQDύοέʔδ w 31$ 3FNPUF1SPDFEVSF$BMM Λߦ͏ͨΊͷύοέʔδ w αʔόʔଆͰొ࿥ͨ͠ΦϒδΣΫτͷϝιουΛωοτϫʔΫӽ͠ʹݺ΂ΔΑ͏ʹͳΔ w ొ࿥ͨ͠ΦϒδΣΫτͷܕ໊͕αʔϏε໊ʹͳΔ w

࢖͍ํ w αʔόʔଆ w ΦϒδΣΫτΛొ࿥ͨ͠ޙʹ4FSWF$POOΛݺͿɻίʔσοΫ͸HPC͕࢖ΘΕΔ w HPCҎ֎Λ࢖͏ͳΒɺ4FSWF$PEFDΛ࢖͏ɻ w )551Λ࢖͏ͳΒɺ)BOEMF)551ΛݺΜͰϋϯυϥΛొ࿥ͨ͠ޙʹɺIUUQ4FSWFΛݺ Ϳ

αϯϓϧ αʔόʔଆɿ type Args struct { A,

αϯϓϧ ΫϥΠΞϯτଆɿ client, err := rpc.DialHTTP("tcp", serverAddress + ":1234")

OFUSQDKTPOSQDύοέʔδ w ίʔσοΫʹHPCͰ͸ͳ͘ɺKTPOΛ࢖͏ͨΊͷύοέʔδ w +40/31$ͷ࢓༷ͱ͸ؔ܎ͳ͍ɻͨ·ͨ·໊લ͕KTPOSQDͳ͚ͩɻ  “jsonrpc was designed to work