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DDD@H
৽͍͠ϓϩάϥϛϯάݴޠͷֶͼํ
)551αʔόʔΛ࡞ֶͬͯͿ
+BWB
4DBMB
$MPKVSF
++6($$$'BMM
!UPEPLS
ָ͍͠
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IUUQTUXJUUFSDPNNBUUO@KQTUBUVT
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IUUQTUXJUUFSDPNNBUUO@KQTUBUVT
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DDD@H
DDD@H
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DDD@H
୭ͩ
ాॴॣ༎!UPEPLS
w גࣜձࣾϏζϦʔν4DBMBΤϯδχΞ
w ٻਓݕࡧΤϯδϯ8FCΫϩʔϥʔࠂγεςϜ։ൃͳͲ
w Ұ෦ͷਓ͔ΒΤϞδχΞͱݺΕ͍ͯ·͢
w จࣈίʔυͱ͔&NBDT͕͖ͳωΦ
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DDD@H
৽͍͠ϓϩάϥϛϯάݴޠΛֶͿ
w εΩϧϓϩάϥϛϯάελΠϧͷ෯Λ͛ΔͨΊ
w ७ਮʹָ͠ΈͷͨΊ
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DDD@H
ֶͿखஈͷҰͭͱͯ͠
)551αʔόʔ։ൃ͕
͓͢͢ΊͰ͢
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DDD@H
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DDD@H
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DDD@H
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DDD@H
͓͢͠Δ͜ͱ
w ͳͥ)551αʔόʔ
w 4DBMB
$MPKVSFʹ͍ͭͯ
w )551αʔόʔΛ࡞Γͳ͕Βֶ΅͏
w ͬ͘͟ΓΞʔΩςΫνϟ
w ֤ݴޠͰ࣮ͯ͠ΈΔ
w 4PDLFUͷѻ͍
w ਖ਼نදݱ
w Ϧιʔεͷ։์
w ฒྻॲཧ
w จࣈྻͷѻ͍
w ·ͱΊ
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DDD@H
IUUQTHJUIVCDPNUPEPLSTJNQMFIUUQTFSWFS
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DDD@H
ͳͥ)551αʔόʔʁ
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DDD@H
৽͍͠ݴޠΛֶͿ࣌ʹΑ͘Δ͜ͱ
w )FMMPXPSME
'J[[#V[[ΛΔ
w ॻ੶ΛಡΉ
w 50%0ΞϓϦͳͲ؆୯ͳ8FCαʔϏεΛ࡞Δ
w FUD
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DDD@H
৽͍͠ݴޠΛֶͿ࣌ʹΑ͘Δ͜ͱ
w )FMMPXPSME
'J[[#V[[ΛΔ
w ॻ੶ΛಡΉ
w 50%0ΞϓϦͳͲ؆୯ͳ8FCαʔϏεΛ࡞Δ
w FUD
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DDD@H
8FCαʔϏεʁ
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DDD@H
8FCαʔϏεʹ%#͕͋Δ
w ͱΓ͋͑ͣ)Ͱྑ͍͔ʜ
w .Z42-8PSL#FODIͰ࡞ͬͨ%%-͕ྲྀͤͳ͍ʂ
w ϩʔΧϧͷ.Z42-͕ݹ͍ɻCSFXVQEBUFʂ
w ͍VQHSBEFͩͬͨ
w %PDLFS ͱ͔͍͏ͭͰ .Z42-Λಈ͔͢ͷ͕
φ͍ΜͰ͔͢Ͷ
w IFSPLV1PTUHSF42-ͳΜͩͬͨ
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DDD@H
8FCαʔϏεʹը໘͕͋Δ
w ͱΓ͋͑ͣదʹCPPUTUSBQͰ࡞Ζ͏ʂ
w ΄͏΄͏ɺ4FNBOUJD6*ͷ΄͏͕ΠϚυΩͬΆ͍Β͍͠
w ςϯϓϨʔτΤϯδϯʁ࣌41"Ͱ͠ΐ
w ੜ$44ਏ͍͔Β4BTTʹ͠Α͏
w 8FCQBDL CBCFMMPBEFS ͳʹͦΕ͓͍͍͠ͷʁ
w EJW͕தԝʹدΒͳ͍
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DDD@H
ͦΕͬͯΓ͍ͨ͜ͱ͚ͩͬʁ
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DDD@H
%POUTIBWFUIBUZBL
w ผʹ%#Λ৮Γ͍ͨΘ͚Ͱͳ͍
w ผʹը໘Λ࡞Γ͍ͨΘ͚Ͱͳ͍
w ৽͍͠ݴޠΛֶͼ͍ͨ
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DDD@H
ͦ͜Ͱ)551αʔόʔͰ͢Α
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DDD@H
)551αʔόʔͳΒ
w %#ը໘Λ༻ҙ͢Δखؒͳ͘ɺखܰʹ։ൃ͕࢝ΊΒΕΔ
w 8FC։ൃʹඞཁͳཁૉʹͦͦ͜͜Ұ௨Γ৮ΕΒΕΔ
w จࣈྻૢ࡞ɺೖग़ྗɺฒྻॲཧͳͲ
w ҧ͏ݴޠɺಉ༷͡Ͱ࡞Εݴޠͷൺֱ͍͢͠
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DDD@H
)551αʔόʔͬͯԿͯ͠Δͷʁ
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DDD@H
)551αʔόʔ͕͍ͬͯΔ͜ͱ
w ΫϥΠΞϯτ͔ΒͷଓΛͪड͚
w ΫϥΠΞϯτ͔ΒૹΒΕ͖ͯͨ)551ϦΫΤετΛύʔε
w ϦΫΤετʹج͍ͮͯ)551ϨεϙϯεΛੜ
w ΫϥΠΞϯτʹϨεϙϯεΛฦ͢
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DDD@H
)551ͷ༷
w 3'$ʢ3FRVFTU'PS$PNNFOUTʣ
w *&5'ʹΑΔٕज़༷ͷอଘɺެ։ܗࣜ
w ϓϩτίϧϑΝΠϧϑΥʔϚοτͳͲ͕த৺
w )5513'$d
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DDD@H
IUUQTUPPMTJFUGPSHIUNMSGD
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DDD@H
IUUQIUUQXHPSH
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DDD@H
؆қͳ࣮ͳΒඦߦఔ
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DDD@H
1ZUIPOͷ4JNQMF)5514FSWFS
w 1ZUIPOͷ4JNQMF)5514FSWFSΛࢀߟʹ͢Δͷ̋
w ܥ
w ܥ
$ python -m SimpleHTTPServer
$ python -m http.server
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DDD@H
4DBMB$MPKVSF
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DDD@H
4DBMB
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DDD@H
4DBMB
w +BWBͱͷ૬ޓӡ༻ੑ
w γʔϜϨεͳݺͼग़͠ɺ+BWBඪ४ϥΠϒϥϦͷ࠶ར༻
w ؆ܿੑ
w লུՄೳͳߏจɺܕਪɺڧྗͳඪ४ϥΠϒϥϦ
w நͷߴ͍ίʔυɺ৽੍͍͠ޚߏจΛఆٛͰ͖Δදݱྗ
w 8IBUͷڧௐɺ)PXͷӅณ
w ੩తܕ͚
w ݕূՄೳੑɺϦϑΝΫλͷ͢͠͞ɺυΩϡϝϯτੑ
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DDD@H
4DBMBͬͯόϦόϦͷ
ؔܕݴޠͳΜͰ͠ΐ
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IUUQTMFBOQVCDPNGQNPSUBMTSFBE
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IUUQTMFBOQVCDPNGQNPSUBMTSFBE
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DDD@H
1MFBTF
EPOUEPUIJTJO4DBMB
.BSUJO0EFSTLZ
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DDD@H
1MFBTF
EPOUEPUIJTJO4DBMB
.BSUJO0EFSTLZ
௨শখాઌੜ
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DDD@H
4DBMBͷ࡞ऀ
1MFBTF
EPOUEPUIJTJO4DBMB
.BSUJO0EFSTLZ
௨শখాઌੜ
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DDD@H
ΦϒδΣΫτࢦͱؔܕͷʮ౷߹ʯ
w ΦϒδΣΫτࢦͷ֓೦ͰؔܕͷػೳΛղऍ
ΦϒδΣΫτ
DBTFDMBTT
తσʔλܕ
001 '1
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DDD@H
$MPKVSF
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DDD@H
$MPKVSF
w -JTQ
w จ๏͕গͳ͍ɺσʔλͱͯ͠ͷίʔυ
w ؔܕϓϩάϥϛϯάͷͨΊͷݴޠ
w ୈҰڃؔɺΠϛϡʔλϒϧͳσʔλߏɺ࠶ؼతͳϧʔϓ
w +BWBͱͷ૬ޓӡ༻ੑ
w ฒߦॲཧͷͨΊʹઃܭ
w 3&1-Λ׆͔ͨ͠ΠϯλϥΫςΟϒΠϯΫϦϝϯλϧͳ
։ൃ
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DDD@H
ίϯηϓτ͕໘ന͍
w ঢ়ଶʹ͍ͭͯͷߟ͑ํɺ*EFOUJUZ
4UBUF
7BMVFͷ
w γϯϓϧ͞ʹ͍ͭͯ
͍Ζ͍Ζܹత
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DDD@H
IUUQCPYPGQBQFSTIBUFOBCMPHDPNFOUSZTJNQMF@NBEF@FBTZ
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DDD@H
-JTQͷγϯλοΫε
ׅހͷ࢝·Γ͔ΒऴΘΓ·Ͱ͕୯Ґ
(ԿΒ͔ͷॲཧ ॲཧͷରͳͲ…)
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DDD@H
$MPKVSFΧοίͷछྨ͕ଟ͘ɺಡΈ͍͢
ͨͱ͑ؔͷҾ
$PNNPO-JTQ
4DIFNF
$MPKVSF
(defun square (x)
(* x x))
(define (square x)
(* x x))
(defn square [x]
(* x x))
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DDD@H
େৎ
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DDD@H
جຊจ๏ͰΥʔϛϯάΞοϓ
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DDD@H
࢛ଇԋࢉ
12 + 40
10 - 1
2 * 3
5 / 2
+BWB
4DBMB
(+ 12 40)
(- 10 1)
(* 2 3)
(/ 5 2) ; -> 5/2 Λѻ͏Ratioܕ
$MPKVSF
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DDD@H
มએݴ
int x = 10;
+BWB
val x = 10
val x: Int = 10
4DBMB
(def x 10)
(let [y 10]
(+ y 3))
; yletͷׅހ͚ͩͰࢀরͰ͖Δ
$MPKVSF
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DDD@H
ϝιουɾؔએݴ
public int f(int x) {
return x + 1;
}
+BWB
(defn f [x]
(+ x 1))
$MPKVSF
def f(x: Int) = x + 1
4DBMB
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DDD@H
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DDD@H
)551αʔόʔΛ
࡞Γͳ͕Βֶ΅͏
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DDD@H
ࠓճ༻ҙͨ͠)551αʔόʔ
w ىಈ͠ɺMPDBMIPTUͷಛఆͷϙʔτͰ)551ϦΫΤετΛͪड͚Δ
w ରԠ͢Δ)551ϦΫΤετϝιου(&5ͷΈ
ͦΕҎ֎ͷϝιου(&5ͱΈͳ͢
w QVCMJDσΟϨΫτϦΑΓ্ͷ֊ͷϦΫΤετʹ
'PSCJEEFOΛฦ͢
w Ϧιʔεͷ.*.&֎෦ϑΝΠϧͰઃఆͰ͖Δ
w ϦΫΤετΛϒϩοΫ͠ͳ͍ʢϚϧνεϨουʣ
w ,FFQ"MJWF͠ͳ͍ɻίωΫγϣϯDMPTF͢Δ
w )551$BDIF͠ͳ͍ɻฦ͞ͳ͍
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DDD@H
ىಈ
w +BWB
NWODPNQJMF
NWOFYFDKBWB
w 4DBMB
TCUSVO
w $MPKVSF
MFJOSVO
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DDD@H
ͭ͘Γʹ͍ͭͯͬ͘͟Γͱ
├── MimeDetector.java
├── Request.java
├── RequestHandler.java
├── RequestParser.java
├── Response.java
├── SimpleJavaHttpServer.java
└── WorkerThread.java
ΞϓϦέʔγϣϯͷΤϯτϦʔϙΠϯτ
3FRVFTU
*OQVU4USFBN
3FTQPOTF
0VUQVU4USFBN
ϦΫΤετͷύʔε
ϦΫΤετͷϋϯυϦϯά
Ϩεϙϯεͷ8SJUF
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DDD@H
ͭ͘Γʹ͍ͭͯͬ͘͟Γͱ
├── MimeDetector.java
├── Request.java
├── RequestHandler.java
├── RequestParser.java
├── Response.java
├── SimpleJavaHttpServer.java
└── WorkerThread.java
)551ϦΫΤετΛύʔε͢Δ
3FRVFTU
*OQVU4USFBN
3FTQPOTF
0VUQVU4USFBN
ϦΫΤετͷύʔε
ϦΫΤετͷϋϯυϦϯά
Ϩεϙϯεͷ8SJUF
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DDD@H
ͭ͘Γʹ͍ͭͯͬ͘͟Γͱ
├── MimeDetector.java
├── Request.java
├── RequestHandler.java
├── RequestParser.java
├── Response.java
├── SimpleJavaHttpServer.java
└── WorkerThread.java
ϦΫΤετΛද͢ΦϒδΣΫτ
3FRVFTU
*OQVU4USFBN
3FTQPOTF
0VUQVU4USFBN
ϦΫΤετͷύʔε
ϦΫΤετͷϋϯυϦϯά
Ϩεϙϯεͷ8SJUF
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DDD@H
ͭ͘Γʹ͍ͭͯͬ͘͟Γͱ
├── MimeDetector.java
├── Request.java
├── RequestHandler.java
├── RequestParser.java
├── Response.java
├── SimpleJavaHttpServer.java
└── WorkerThread.java
ϦΫΤετ͔ΒϨεϙϯεΛੜ
3FRVFTU
*OQVU4USFBN
3FTQPOTF
0VUQVU4USFBN
ϦΫΤετͷύʔε
ϦΫΤετͷϋϯυϦϯά
Ϩεϙϯεͷ8SJUF
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DDD@H
ͭ͘Γʹ͍ͭͯͬ͘͟Γͱ
├── MimeDetector.java
├── Request.java
├── RequestHandler.java
├── RequestParser.java
├── Response.java
├── SimpleJavaHttpServer.java
└── WorkerThread.java
ϨεϙϯεΛද͢ΦϒδΣΫτ
3FRVFTU
*OQVU4USFBN
3FTQPOTF
0VUQVU4USFBN
ϦΫΤετͷύʔε
ϦΫΤετͷϋϯυϦϯά
Ϩεϙϯεͷ8SJUF
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DDD@H
ͭ͘Γʹ͍ͭͯͬ͘͟Γͱ
├── MimeDetector.java
├── Request.java
├── RequestHandler.java
├── RequestParser.java
├── Response.java
├── SimpleJavaHttpServer.java
└── WorkerThread.java
)551ϨεϙϯεΛ8SJUF
3FRVFTU
*OQVU4USFBN
3FTQPOTF
0VUQVU4USFBN
ϦΫΤετͷύʔε
ϦΫΤετͷϋϯυϦϯά
Ϩεϙϯεͷ8SJUF
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DDD@H
֤ݴޠͰͬͯΈΔ
w 4PDLFUͷѻ͍
w ਖ਼نදݱ
w Ϧιʔεͷ։์
w ฒߦॲཧ
w จࣈྻͷѻ͍
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DDD@H
࡞Γ࢝ΊΔίπ
w ͘͠ߟ͑͗͢ͳ͍
w ॳΊ͔Βߟ͑ํΛࠜຊతʹม͑Δඞཁͳ͍
w Oޙʹ͏Ұ࡞Γ͢ͱ͕࣮ײͰ͖Δ͔
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DDD@H
4PDLFUͷѻ͍
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DDD@H
4PDLFU
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DDD@H
4PDLFU
w ௨৴ʹ͓͚ΔΤϯυϙΠϯτΛදݱͨ͠σʔλϞσϧ
֤ΤϯυϙΠϯτΛࣝผ͢Δ̎ͭͷɺ
͢ͳΘͪ*1ΞυϨεͱϙʔτ൪߸ɺ
ଟ͘ͷ߹ιέοτ TPDLFU
ͱݺΕΔɻ
ʮ6/*9ωοτϫʔΫϓϩάϥϛϯάʯ
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DDD@H
4PDLFU௨৴ͷࣜਤ
ΫϥΠΞϯτ αʔόʔ
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DDD@H
4PDLFU௨৴ͷࣜਤ
ΫϥΠΞϯτ αʔόʔ
αʔόʔιέοτ
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DDD@H
4PDLFU௨৴ͷࣜਤ
ΫϥΠΞϯτ αʔόʔ
αʔόʔιέοτ
ΫϥΠΞϯτιέοτ
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DDD@H
4PDLFU௨৴ͷࣜਤ
ΫϥΠΞϯτ αʔόʔ
αʔόʔιέοτ
ΫϥΠΞϯτιέοτ
ଓཁٻ
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DDD@H
4PDLFU௨৴ͷࣜਤ
ΫϥΠΞϯτ αʔόʔ
αʔόʔιέοτ
ΫϥΠΞϯτιέοτ
ଓ
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DDD@H
4PDLFU௨৴ͷࣜਤ
ΫϥΠΞϯτ αʔόʔ
αʔόʔιέοτ
ΫϥΠΞϯτιέοτ
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DDD@H
4PDLFUͷѻ͍
// αʔόʔιέοτͷੜ
ServerSocket serverSocket = new ServerSocket(8080);
while (true) {
// ଓΛͪड͚Δɻଓ͞ΕΔ·ͰϒϩοΫɻ
Socket socket = serverSocket.accept();
InputStream in = socket.getInputStream();
OutputStream out = socket.getOutputStream();
...
}
4JNQMF+BWB)UUQ4FSWFSKBWBʢൈਮʣ
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DDD@H
4PDLFUͷѻ͍
// αʔόʔιέοτͷੜ
val serverSocket = new ServerSocket(8080)
while (true) {
// ଓΛͪड͚Δɻଓ͞ΕΔ·ͰϒϩοΫ
val socket = serverSocket.accept
val in = s.getInputStream
val out = s.getOutputStream
...
}
4JNQMF)UUQ4FSWFSTDBMBʢൈਮʣ
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DDD@H
4PDLFUͷѻ͍
(let [server-socket (new ServerSocket 8080)]
(while true
(let [socket (.accept server-socket)
in (.getInputStream socket)
out (.getOutputStream socket)]
...)))
DPSFDMKʢൈਮʣ
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DDD@H
4PDLFUͷѻ͍ʹֶ͍ͭͯΜͩ͜ͱ
w 4FSWFS4PDLFUΦϒδΣΫτΛੜ͠ɺ
ΫϥΠΞϯτ͔ΒͷଓΛBDDFQUͰͪड͚Δ
w 4PDLFUΦϒδΣΫτʢΫϥΠΞϯτιέοτʣ͔Β
*O0VUQVU4USFBN͕औಘͰ͖Δ
w *OQVU4USFBN͔Β)551ϦΫΤετΛ3FBE͠ɺ
0VUQVU4USFBNʹ)551ϨεϙϯεΛ8SJUF͢Δ
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DDD@H
ਖ਼نදݱ
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DDD@H
ਖ਼نදݱ
w 4PDLFUͷ*OQVU4USFBNΛ
ҰߦಡΉ
ˠSFRVFTUMJOF
w ֤ཁૉΛநग़͍ͨ͠
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DDD@H
ਖ਼نදݱ
w 4PDLFUͷ*OQVU4USFBNΛ
ҰߦಡΉ
ˠSFRVFTUMJOF
w ֤ཁૉΛநग़͍ͨ͠
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DDD@H
w 4PDLFUͷ*OQVU4USFBNΛ
ҰߦಡΉ
ˠSFRVFTUMJOF
w ֤ཁૉΛநग़͍ͨ͠
ਖ਼نදݱ
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DDD@H
໊લ͖άϧʔϓ
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DDD@H
໊લ͖άϧʔϓ
w ਖ਼نදݱͷάϧʔϓʹ໊લΛ͚Δ͜ͱ͕Ͱ͖Δ
w άϧʔϓͷॱং͕มΘͬͨͱͯ͠औΓग़͢ॲཧͦͷ··
import java.util.regex.*;
String regex = "(?\\d+)/(?\\d+)/(?\\d+)";
Pattern p = Pattern.compile(regex);
Matcher m = p.matcher("2017/11/18");
if (m.find()) {
System.out.println(m.group("year")); // 2017
System.out.println(m.group("month")); // 11
System.out.println(m.group("day")); // 18
}
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DDD@H
w ϦΫΤετϥΠϯͷ֤ཁૉʹ໊લΛ͚ͯநग़
public static Pattern requestLinePattern =
Pattern.compile("(?.*) (?.*?) (?.*?)");
public Request fromInputStream(InputStream in){
BufferedReader reader =
new BufferedReader(new InputStreamReader(in));
String requestLine = reader.readLine();
Matcher matcher = requestLinePattern.matcher(requestLine);
if (!matcher.find()) return null;
String method = matcher.group("method");
String targetPath = matcher.group("path");
String httpVersion = matcher.group("version");
return new Request(method, targetPath, httpVersion);
}
໊લ͖άϧʔϓ
3FRVFTU1BSTFSKBWBʢൈਮʣ
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DDD@H
ύλʔϯϚον
S
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DDD@H
ύλʔϯϚον
w +BWBͷTXJUDIจʹࣅ͍ͯΔ͕ɺΑΓॊೈͰڧྗ
w ʹҰக͢Δ͔͚ͩͰͳ͘ɺܕߏͰذ
0 match {
case 0 => "Zero" // "Zero"
case _ => "Other"
}
List(1, 2, 3) match {
case List(_, x, _) => x // 2
case _ => -1
}
1 match {
x: Int => s"$xInt" // 1Int
x: String => s"$xString"
x => s"$x???"
}
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DDD@H
ύλʔϯϚον
w ࠓޙ+BWBʹೖΔ͔͠Εͳ͍
IUUQPQFOKELKBWBOFUKFQT
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DDD@H
ύλʔϯϚον
w ਖ਼نදݱΦϒδΣΫτʹରͯ͠Ϛονͤ͞ΒΕΔ
val pattern = "(.+)/(.+)/(.+)".r //.rͰregexܕ
"2017/11/18" match {
case pattern(y, m, d) => s"${y}${m}݄${d}"
case _ => "???"
}
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DDD@H
ύλʔϯϚον
val pattern = "(.+) (.+) (.+)".r
requestLine match {
case pattern(method, path, version) =>
Some(Request(method, path, version))
case _ => None
}
3FRVFTU1BSTFSTDBMBʢൈਮʣ
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DDD@H
0QUJPOܕ
requestLine match {
case pattern(method, path, version) =>
Some(Request(method, path, version))
case _ => None
}
w +BWBͰ͍͏0QUJPOBM
w 4PNFͱ/POF͔ΒͳΔܕ
w ͕͋Δ͔ͳ͍͔͔Βͳ͍ঢ়ଶΛද͢
w ͕ଘࡏ͢Δ͔ͷνΣοΫΛڧ੍Ͱ͖Δ
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DDD@H
SFpOE
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DDD@H
SFpOE
w ਖ਼نදݱʹϚονͨ͠จࣈྻΛऔಘ
w ҾʹάϧʔϓԽͨ͠ਖ਼نදݱΦϒδΣΫτΛ͢ͱɺ
ઌ಄ʹϚονͨ͠จࣈྻશମɺҎ߱ʹΩϟϓνϟ͞ΕͨจࣈྻͷϕΫλʔ
;; #"" java.util.regex.PatternͷϦςϥϧ
(re-find #"(.+)/(.+)/(.+)" "2017/11/18")
;; => ["2017/11/18" "2017" "11" "18"]
;; restͰઌ಄Ҏ֎ͷཁૉΛऔಘ
(rest (re-find #"(.+)/(.+)/(.+)" "2017/11/18"))
;; => ("2017" "11" "18")
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DDD@H
[JQNBQ
w ڧྗͳίϨΫγϣϯϥΠϒϥϦ$MPKVSFͷಛ
w [JQNBQͭͷίϨΫγϣϯ͔Β.BQΛ࡞Δ
w $MPKVSFͰΫϥεΑΓ.BQΛΉ
(zipmap [:a :b :c]
[1 2 3])
;; => {:a 1, :b 2, :c 3}
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DDD@H
SFpOE[JQNBQ
(let [line (.readLine reader)]
(zipmap [:method :path :version]
(rest (re-find #"(.+) (.+) (.+)" line))))
;; => {:method "GET", :path "/", :version "HTTP/1.1"}
SFRVFTU@QBSTFSDMKʢൈਮʣ
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DDD@H
SFpOE[JQNBQ
(let [line (.readLine reader)]
(zipmap [:method :path :version]
(rest (re-find #"(.+) (.+) (.+)" line))))
;; => {:method "GET", :path "/", :version "HTTP/1.1"}
SFRVFTU@QBSTFSDMKʢൈਮʣ
<NFUIPEQBUIWFSTJPO>
<(&5)551>
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DDD@H
SFpOE[JQNBQ
(let [line (.readLine reader)]
(zipmap [:method :path :version]
(rest (re-find #"(.+) (.+) (.+)" line))))
;; => {:method "GET", :path "/", :version "HTTP/1.1"}
SFRVFTU@QBSTFSDMKʢൈਮʣ
<NFUIPEQBUIWFSTJPO>
<(&5)551>
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DDD@H
ਖ਼نදݱʹֶ͍ͭͯΜͩ͜ͱ
໊લ͖άϧʔϓ
ύλʔϯϚον
S
SFpOE
ఴࣈͰΞΫηε͢ΔΑΓ҆৺
ߏͷղʹ͑Δ
݁ՌίϨΫγϣϯɺڧྗͳίϨΫγϣϯૢ࡞ͱΈ߹Θͤͯ
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DDD@H
Ϧιʔεͷղ์
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DDD@H
Ϧιʔεͷղ์
w ετϦʔϜ%#ίωΫγϣϯɺιέοτ
͍ऴΘͬͨΒDMPTF
w ΕΔͱϝϞϦϦʔΫͷݪҼʹͳΔ͜ͱ͕͋Δ
w खͰDMPTFॻ͖ͨ͘ͳ͍ʂ
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DDD@H
5SZXJUI3FTPVSDFT
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DDD@H
5SZXJUI3FTPVSDFT
try (InputStream in = new FileInputStream(file)) {
// Կ͔ϦιʔεΛѻ͏ॲཧ
}
// try۟Λൈ͚ͨΒclose
w USZ۟Λൈ͚ͨΒࣗಈͰDMPTF
w ରKBWBJP$MPTFBCMF
KBWBMBOH"VUP$MPTFBCMFͷ࣮Ϋϥε
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DDD@H
-PBO1BUUFSO
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DDD@H
-PBO1BUUFSO
w ʮआΓͨΒฦ͢ʯΛ࣮֬ʹߦ͏
w ੍ޚߏͷΑ͏ʹݟ͔͚࣮ͤͯϝιου
val reader = new BufferedReader(...)
using(reader) { r =>
// readerΛͬͨԿ͔ͷॲཧ
}
// ϒϩοΫΛൈ͚ͨΒreaderclose͞Ε͍ͯΔ
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DDD@H
-PBO1BUUFSOͷ࣮
def using[A, R <: Closeable](resource: R)(f: R => A): A = {
try {
f(resource)
} finally {
resource.close()
}
}
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DDD@H
-PBO1BUUFSOͷ࣮
def using[A, R <: Closeable](resource: R)(f: R => A): A = {
try {
f(resource)
} finally {
resource.close()
}
}
ܕม3$MPTFBCMF
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DDD@H
-PBO1BUUFSOͷ࣮
def using[A, R <: Closeable](resource: R)(f: R => A): A = {
try {
f(resource)
} finally {
resource.close()
}
}
3ܕͷԿ͔Λड͚औΓɺԿΒ͔ͷܕ"Λฦؔ͢ΛҾʹͱΔ
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DDD@H
-PBO1BUUFSOͷ࣮
def using[A, R <: Closeable](resource: R)(f: R => A): A = {
try {
f(resource)
} finally {
resource.close()
}
}
Ϧιʔεʹରͯؔ͠Λద༻
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DDD@H
-PBO1BUUFSOͷ࣮
def using[A, R <: Closeable](resource: R)(f: R => A): A = {
try {
f(resource)
} finally {
resource.close()
}
}
࠷ޙʹDMPTF
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DDD@H
ׅހ
ͱதׅހ\^
"hoge".startsWith{"ho"} // ͋·ΓΒͳ͍
"hoge".replace{"ho", "fu"} // Ͱ͖ͳ͍
"hoge" map { c =>
c.someFunc
...
} // Α͘Δ
w Ҿ͕Ұ͚ͭͩͷ߹ɺׅހΛதׅހͰॻ͍ͯྑ͍
w ҾʹؔΛ͢߹ɺதׅހΛ͏͜ͱ͕Α͋͘Δ
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DDD@H
-PBO1BUUFSO
using(socket) { s =>
val in = s.getInputStream
val out = s.getOutputStream
val request = parser.fromInputStream(in)
val response = request.map(handleRequest)
response.foreach(_.writeTo(out))
}
4JNQMF)UUQ4FSWFSTDBMBʢൈਮʣ
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DDD@H
XJUIPQFO
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DDD@H
w -PBO1BUUFSOʹࣅͨXJUIPQFOͱ͍͏ϚΫϩ
w MFUͱಉ͡Α͏ͳײ͡Ͱ͏
XJUIPQFO
(with-open [f (io/file "test.txt")]
...)
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DDD@H
XJUIPQFO
(with-open [s socket]
(-> (request-parser/from-input-stream
(.getInputStream s))
(request-handler/handle-request)
(response-writer/write (.getOutputStream s))))
DPSFDMKʢൈਮʣ
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DDD@H
Ϧιʔεͷղ์ʹֶ͍ͭͯΜͩ͜ͱ
5SZXJUI3FTPVSDFT
-PBO1BUUFSO
XJUIPQFO
USZ۟Λൈ͚Δ࣌ʹDMPTF
͕ؔͰ͋Δ͜ͱΛ׆͔͠ɺ੍ޚߏจͷΑ͏ʹݟͤΔ
DMPTFͯ͘͠ΕΔMFUΈ͍ͨͳΠϝʔδ
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DDD@H
ฒߦॲཧ
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DDD@H
ฒߦॲཧ
w ϦΫΤετΛγϦΞϧʹॲཧ͢ΔͱଞͷϦΫΤετΛͨͤͯ͠·͏
w ͳͷͰϦΫΤετΛड͚͚ͨઌฒߦʹॲཧ͢Δ
w +7.ݴޠͳͷͰϚϧνεϨουͰ
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DDD@H
5ISFBE
&YFDVUPS4FSWJDF
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DDD@H
5ISFBE
class HogeThread extends Thread {
public void run() {
// Կ͔ඇಉظʹ࣮ߦ͍ͨ͠ॲཧ
}
}
HogeThread h = new HogeThread();
h.start();
class FugaRunnable implements Runnable {
public void run() {
// Կ͔ඇಉظʹ࣮ߦ͍ͨ͠ॲཧ
}
}
FugaRunnable f = new Thread(new FugaRunnable());
f.start();
5ISFBEΛFYUFOET3VOOBCMFΛJNQMFNFOUT
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DDD@H
5ISFBE
public class WorkerThread extends Thread {
private Socket socket;
private RequestParser parser;
private RequestHandler handler;
public WorkerThread(
Socket socket, RequestParser parser,
RequestHandler handler) {
...
8PSLFS5ISFBEKBWBʢൈਮʣ
4JNQMF+BWB)UUQ4FSWFSKBWBʢൈਮʣ
Thread worker =
new WorkerThread(socket, parser, handler);
worker.start();
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DDD@H
&YFDVUPS4FSWJDF
ExecutorService cachedPool =
Executors.newCachedThreadPool();
cachedPool.execute(runnable);
ExecutorService fixedPool =
Executors.newFixedThreadPool(4);
fixedPool.execute(runnable);
w ʮλεΫʯΛผεϨουͰॲཧ͢ΔͨΊͷΈ
w εϨουϓʔϧͷछྨΛࢦఆͰ͖Δ
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DDD@H
'VUVSF
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DDD@H
'VUVSF
w 'VUVSFBQQMZ͞ΕͨॲཧΛඇಉظʹ࣮ߦ
w ͍ͭͲͷΑ͏ʹඇಉظʹ࣮ߦ͢Δ͔&YFDVUJPO$POUFYU࣍ୈ
import scala.concurrent.Future
// ForkJoinPoolɺσϑΥϧτͰίΞͷฒྻͰॲཧ
import scala.concurrent.ExecutionContext.
Implicits.global
val result: Future[User] = Future {
userRepository.fetch(userId)
}
result.map(user => user.id)
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DDD@H
&YFDVUJPO$POUFYUͲ͏ड͚औΔʁ
w 'VUVSFBQQMZʹҾϒϩοΫ͕ͭ
w ͭͷҾϒϩοΫͰ&YFDVUJPO$POUFYUΛड͚औΔ
object Future {
...
def apply[T](body: =>T)(implicit executor: ExecutionContext)
}
Future {
userRepository.fetch(user)
}
Future.apply(
userRepository.fetch(user)
)
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DDD@H
JNQMJDJU8IBUͱ)PXͷ
w )PX͕ڊେʹͳΔͱɺίʔυͷຊདྷͷҙਤ͕ຒΕͯ͠·͏
w JNQMJDJUͷେ͖ͳϞνϕʔγϣϯ)PXͷӅณ
w 8IBUͱ)PXΛ͢Δ͜ͱͰɺతΛతʹࣔ͢͜ͱ͕Ͱ͖Δ
val values: Seq[(String, Option[Int])]
val sorted = sort(values)(
tuple2Comparator(
stringComparator,
optionComparator(intComparator)))
val sorted = sort(values) // implicit
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DDD@H
IUUQHBLV[[[[HJUIVCJPTMJEFTJNQMJDJU@SFJOUSPEVDUJPO
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DDD@H
UISFBE
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DDD@H
$MPKVSFͷฒߦॲཧؔ
w $MPKVSFͷฒߦॲཧؔͨ͘͞Μ͋Δ
w HP
w UISFBE
w TFOE
w TFOEPGG
w GVUVSF
w FUD
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DDD@H
IUUQUZBOPTIFMpODDPNQPTUDMPKVSFDPODVSSFOU
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DDD@H
$MPKVSFͷฒߦॲཧؔ
εϨουϓʔϧ εϨου
TFOE 'JYFE5ISFBE1PPM ίΞ
TFOEPGG $BDIFE5ISFBE1PPM ੍ݶͳ͠
GVUVSFGVUVSFDBMM
QNBQQDBMMT
$BDIFE5ISFBE1PPM ੍ݶͳ͠
HP 'JYFE5ISFBE1PPM ίΞ
UISFBE
UISFBEDBMM
$BDIFE5ISFBE1PPM ੍ݶͳ͠
SFEVDFST 'PSL+PJO1PPM ࣗಈ੍ޚ
IUUQUZBOPTIFMpODDPNQPTUDMPKVSFDPODVSSFOU
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DDD@H
*0όϯυ$16όϯυ
w $MPKVSFͷฒߦॲཧؔɺ*0$16όϯυͷछྨʹେผ
*0όϯυͳॲཧɺ࣮ߦதͷॲཧ͕$16ΑΓ*0ॲཧʹ
ڧ͘ґଘ͠·͢ɻ%#ΞΫηεͱ͔ϦϞʔτ௨৴ͱ͔Ͱ͢Ͷɻ
ผεϨουͰ͜ͷॲཧΛ࣮ߦͨ͠߹ɺεϨουେ෦Λɺ
*0ॲཧͪঢ়ଶͰա͝͠·͢ɻ
$16όϯυͳॲཧɺ్தʹ*0ͪͷΑ͏ͳʮػʯ͕
ൃੜͤͣɺ$16ΛͿΜճ͠ଓ͚ΔΑ͏ͳॲཧͰ͢ɻ
શσʔλ͕ϝϞϦʹࡌ͍ͬͯͯɺ$16͕ϑϧՔಇͰͦΕΒΛ
ॲཧ͢ΔΑ͏ͳέʔεͰ͢ɻ
IUUQUZBOPTIFMpODDPNQPTUDMPKVSFDPODVSSFOU
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DDD@H
$MPKVSFͷฒߦॲཧؔ
εϨουϓʔϧ εϨου
TFOE 'JYFE5ISFBE1PPM ίΞ
TFOEPGG $BDIFE5ISFBE1PPM ੍ݶͳ͠
GVUVSFGVUVSFDBMM
QNBQQDBMMT
$BDIFE5ISFBE1PPM ੍ݶͳ͠
HP 'JYFE5ISFBE1PPM ίΞ
UISFBE
UISFBEDBMM
$BDIFE5ISFBE1PPM ੍ݶͳ͠
SFEVDFST 'PSL+PJO1PPM ࣗಈ੍ޚ
IUUQUZBOPTIFMpODDPNQPTUDMPKVSFDPODVSSFOU
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DDD@H
$MPKVSFͷฒߦॲཧؔ
εϨουϓʔϧ εϨου
TFOE 'JYFE5ISFBE1PPM ίΞ
TFOEPGG $BDIFE5ISFBE1PPM ੍ݶͳ͠
GVUVSFGVUVSFDBMM
QNBQQDBMMT
$BDIFE5ISFBE1PPM ੍ݶͳ͠
HP 'JYFE5ISFBE1PPM ίΞ
UISFBE
UISFBEDBMM
$BDIFE5ISFBE1PPM ੍ݶͳ͠
SFEVDFST 'PSL+PJO1PPM ࣗಈ੍ޚ
IUUQUZBOPTIFMpODDPNQPTUDMPKVSFDPODVSSFOU
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DDD@H
UISFBE
(thread
(with-open [s socket
in (.getInputStream s)
out (.getOutputStream s)]
(-> (request-parser/from-input-stream in)
(request-handler/handle-request)
(response-writer/write out))))
DPSFDMKʢൈਮʣ
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DDD@H
ฒߦॲཧʹֶ͍ͭͯΜͩ͜ͱ
5ISFBE
&YFDVUPS4FSWJDF
'VUVSF
UISFBE
FYUFOET5ISFBEJNQMFNFOUT3VOOBCMF
5ISFBE্ཱͪ͛Ͱͳ͍ɻ
Ͳ͏࣮ߦ͢Δ͔&YFDVUJPO$POUFYU࣍ୈɻ
JNQMJDJUʹΑΔ)PXͷӅณɻ
*0$16όϯυ͔Λҙࣝ͠Α͏
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DDD@H
จࣈྻͷѻ͍
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DDD@H
จࣈྻ݁߹
w ϨεϙϯεʢΦϒδΣΫτϚοϓʣ͔Β
)551ϨεϙϯεϔομΛΈཱ͍ͯͨ
public class Response {
public final Status status;
public final String contentType;
public final int contentLength;
public final byte[] body;
}
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DDD@H
4USJOH#VJMEFS
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DDD@H
4USJOH#VJMEFS
String response =
"HTTP/1.1 " + status.statusCode + CRLF +
"Server: SimpleJavaHttpServer" + CRLF +
"Content-Type: " + contentType + CRLF +
"Content-Length: " +
String.valueOf(contentLength) + CRLF +
"Connection: Close" + CRLF +
CRLF;
3FTQPOTFKBWBʢൈਮʣ
࠷దԽ͞ΕΔ͔ࣗ৴͕ͳ͚ΕKBWBQD
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DDD@H
4USJOH*OUFSQPMBUJPO
5SJQMF2VPUF
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DDD@H
4USJOH*OUFSQPMBUJPO
w จࣈྻϦςϥϧͷલʹTΛ͚ΔͱɺมΛల։Ͱ͖Δ
val price = 1000
s"Price is $price"
// => Price is 1000
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DDD@H
5SJQMF2VPUF
"Hello triple quote!\nHello stripMargin!"
"""Hello triple quote!
Hello stripMargin!"""
"""|Hello triple quote!
|Hello stripMargin!""".stripMargin
w վߦΛؚΉจࣈྻΛຒΊࠐΉʹɺΛ͏
w ΠϯσϯτΛଗ͑ΔʹΠϯσϯτจࣈ c
ͱTUSJQ.BSHJOΛ͏
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DDD@H
4USJOH*OUFSQPMBUJPOͱ5SJQMF2VPUF
val response =
s"""HTTP/1.1 ${status.value}
|Date: ${rfc1123Formatter.format(now)}
|Server: SimpleScalaHttpServer
|Content-Type: $contentType
|Content-Length: ${body.length.toString}
|Connection: Close
|
|""".stripMargin
3FTQPOTFTDBMBʢൈਮʣ
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DDD@H
TUS
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DDD@H
w $MPKVSFͰจࣈྻͷ݁߹Ͱͳ͘TUS
w ՄมҾɺ4ࣜͳΒͰ
TUS
(+ "hoge" "fuga")
ClassCastException java.lang.String cannot
be cast to java.lang.Number
clojure.lang.Numbers.add (Numbers.java:128)
(str "hoge" "fuga" "piyo")
// => hogefugapiyo
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DDD@H
TUS
(let [header (str
"HTTP/1.1" sp status sp reason-phrase crlf
"Content-Length:" (count body) crlf
"Content-Type:" content-type crlf
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SFTQPOTF@XSJUFSDMKʢൈਮʣ
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DDD@H
จࣈྻ݁߹ʹֶ͍ͭͯΜͩ͜ͱ
4USJOH#VJMEFS
4USJOH*OUFSQPMBUJPO
5SJQMF2VPUF
TUS
KBWBQD
ͪΐͬͱͨ͠ςϯϓϨʔτΤϯδϯΈ͍ͨʹ͑Δ
ָ͞4ࣜͳΒͰɻͪΐͬͱ-JTQ͕͖ʹͳΔ
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DDD@H
֤ݴޠͰͬͯΈͨ
w 4PDLFUͷѻ͍
w ਖ਼نදݱ
w Ϧιʔεͷ։์
w ฒߦॲཧ
w จࣈྻͷѻ͍
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DDD@H
·ͱΊ
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DDD@H
)551αʔόʔΛ࡞ͬͯݴޠΛֶ΅͏
w %#ը໘Λ༻ҙ͢Δखؒͳ͘ɺखܰʹ։ൃ͕࢝ΊΒΕΔ
w 8FC։ൃʹඞཁͳཁૉʹͦͦ͜͜Ұ௨Γ৮ΕΒΕΔ
w จࣈྻૢ࡞ɺೖग़ྗɺฒྻॲཧͳͲ
w ࠷ॳ͘͠ߟ͑͗͢ͳ͍ɻ
ॳΊ͔Βߟ͑ํΛࠜຊతʹม͑Δඞཁͳ͍
w طʹ͍ͬͯΔ͜ͱͱEJGGΛͱͬͯΈΑ͏
w ͦͷݴޠͷੈք؍ΛΔख͕͔Γ͕ͦͷEJGGʹ͋Δ͔
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DDD@H
w ڭཆͱͯ͠ͷ$MPKVSFʢճظະఆʣ
w ڭཆͱͯ͠ͷ4DBMBʢ༧ఆʣ
w DPOQBTTͰ%$VCFͷϝϯόʔʹͳΔͱ
͓Β͕ͤಧ͖·͢
ڭཆγϦʔζ༧ఆ͍ͯ͠·͢
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DDD@H
(PPE$PEJOH