{-# LANGUAGE
- UnicodeSyntax
+ OverloadedStrings
+ , UnicodeSyntax
#-}
module Main where
import Codec.Compression.GZip
import Control.Applicative
import Control.Monad
import qualified Data.Ascii as A
-import Data.Bits
import qualified Data.ByteString.Base64 as B64
import qualified Data.ByteString.Char8 as Strict
import qualified Data.ByteString.Lazy as Lazy
import Data.Char
+import Data.Digest.Pure.SHA
import Data.Int
import Data.Maybe
import Data.Time
deriving (Eq, Show)
options ∷ [OptDescr CmdOpt]
-options = [ Option ['o'] ["output"]
+options = [ Option "o" ["output"]
(ReqArg OptOutput "FILE")
"Output to the FILE."
- , Option ['m'] ["module"]
+ , Option "m" ["module"]
(ReqArg OptModName "MODULE")
"Specify the resulting module name. (required)"
- , Option ['s'] ["symbol"]
+ , Option "s" ["symbol"]
(ReqArg OptSymName "SYMBOL")
"Specify the resulting symbol name."
- , Option ['t'] ["mime-type"]
+ , Option "t" ["mime-type"]
(ReqArg OptMIMEType "TYPE")
"Specify the MIME Type of the file."
- , Option ['e'] ["etag"]
+ , Option "e" ["etag"]
(ReqArg OptETag "TAG")
"Specify the ETag of the file."
- , Option ['h'] ["help"]
+ , Option "h" ["help"]
(NoArg OptHelp)
"Print this message."
]
exitWith $ ExitFailure 1
when (length sources ≥ 2)
- $ error "too many input files."
+ $ fail "too many input files."
generateHaskellSource opts (head sources)
generateHaskellSource ∷ [CmdOpt] → FilePath → IO ()
generateHaskellSource opts srcFile
- = do modName ← getModuleName opts
- symName ← getSymbolName opts modName
- mimeType ← getMIMEType opts srcFile
- lastMod ← getLastModified srcFile
- input ← openInput srcFile
- output ← openOutput opts
- eTag ← getETag opts input
+ = do modName ← getModuleName opts
+ symName ← getSymbolName opts modName
+ mType ← getMIMEType opts srcFile
+ lastMod ← getLastModified srcFile
+ input ← openInput srcFile
+ output ← openOutput opts
+ tag ← getETag opts input
let compParams = defaultCompressParams { compressLevel = bestCompression }
gzippedData = compressWith compParams input
rawB64 = B64.encode <$> Lazy.toChunks input
gzippedB64 = B64.encode <$> Lazy.toChunks gzippedData
- header ← mkHeader srcFile originalLen gzippedLen useGZip mimeType eTag lastMod
+ header ← mkHeader srcFile originalLen gzippedLen useGZip mType tag lastMod
- let hsModule = mkModule (ModuleName modName) (name symName) imports decls
+ let hsModule = mkModule modName symName imports decls
imports = mkImports useGZip
- decls = concat [ declResourceDef
- , entityTagDecl eTag
+ decls = concat [ resourceDecl symName useGZip
+ , entityTagDecl tag
, lastModifiedDecl lastMod
- , contentTypeDecl mimeType
+ , contentTypeDecl mType
, if useGZip then
dataDecl (name "gzippedData") gzippedB64
else
dataDecl (name "rawData") rawB64
]
- declResourceDef
- = [ HsTypeSig (⊥) [HsIdent symName]
- (HsQualType []
- (HsTyCon (UnQual (HsIdent "ResourceDef"))))
- , HsFunBind [HsMatch (⊥) (HsIdent symName)
- [] (HsUnGuardedRhs defResourceDef) []]
- ]
-
- defResourceDef ∷ HsExp
- defResourceDef
- = let defResGet = if useGZip
- then defResGetGZipped
- else resGetRaw
- in
- (HsRecConstr (UnQual (HsIdent "ResourceDef"))
- [ HsFieldUpdate (UnQual (HsIdent "resUsesNativeThread"))
- (HsCon (UnQual (HsIdent "False")))
- , HsFieldUpdate (UnQual (HsIdent "resIsGreedy"))
- (HsCon (UnQual (HsIdent "False")))
- , HsFieldUpdate (UnQual (HsIdent "resGet")) defResGet
- , HsFieldUpdate (UnQual (HsIdent "resHead"))
- (HsCon (UnQual (HsIdent "Nothing")))
- , HsFieldUpdate (UnQual (HsIdent "resPost"))
- (HsCon (UnQual (HsIdent "Nothing")))
- , HsFieldUpdate (UnQual (HsIdent "resPut"))
- (HsCon (UnQual (HsIdent "Nothing")))
- , HsFieldUpdate (UnQual (HsIdent "resDelete"))
- (HsCon (UnQual (HsIdent "Nothing")))
- ]
- )
-
- defResGetGZipped ∷ HsExp
- defResGetGZipped
- = let doExp = HsDo [ foundEntityStmt
- , setContentTypeStmt
- , bindMustGunzip
- , doConditionalOutput
- ]
- bindMustGunzip
- = HsGenerator (⊥)
- (HsPVar (HsIdent "mustGunzip"))
- (HsApp (HsApp (HsVar (UnQual (HsIdent "liftM")))
- (HsVar (UnQual (HsIdent "not"))))
- (HsParen
- (HsApp (HsVar (UnQual (HsIdent "isEncodingAcceptable")))
- (HsLit (HsString "gzip")))))
- doConditionalOutput
- = HsQualifier
- (HsIf (HsVar (UnQual (HsIdent "mustGunzip")))
- expOutputGunzipped
- expOutputGZipped)
- expOutputGunzipped
- = (HsApp (HsVar (UnQual (HsIdent "outputLBS")))
- (HsParen
- (HsApp (HsVar (UnQual (HsIdent "decompress")))
- (HsVar (UnQual (HsIdent "gzippedData"))))))
- expOutputGZipped
- = HsDo [ setContentEncodingGZipStmt
- , outputStmt (var $ name "gzippedData")
- ]
- in
- HsApp (HsCon (UnQual (HsIdent "Just")))
- (HsParen doExp)
hPutStrLn output header
hPutStrLn output (prettyPrint hsModule)
hClose output
-mkModule ∷ ModuleName → Name → [ImportDecl] → [Decl]
+mkModule ∷ ModuleName → Name → [ImportDecl] → [Decl] → Module
mkModule modName symName imports decls
- = let modPragma = [ LanguagePragma (⊥) [ name (show OverloadedStrings)
- ]
- ]
- exports = [ EVar (UnQual symName)
- ]
+ = let modPragma = [ LanguagePragma (⊥) [ name (show OverloadedStrings) ] ]
+ exports = [ EVar (UnQual symName) ]
in
Module (⊥) modName modPragma Nothing (Just exports) imports decls
mkImports ∷ Bool → [ImportDecl]
mkImports useGZip
= [ ImportDecl (⊥) (ModuleName "Data.ByteString.Base64")
- True False (Just (ModuleName "B64")) Nothing
+ True False Nothing (Just (ModuleName "B64")) Nothing
, ImportDecl (⊥) (ModuleName "Data.ByteString.Lazy")
- True False (Just (ModuleName "Lazy")) Nothing
+ True False Nothing (Just (ModuleName "Lazy")) Nothing
, ImportDecl (⊥) (ModuleName "Data.Time")
- False False Nothing Nothing
+ False False Nothing Nothing Nothing
, ImportDecl (⊥) (ModuleName "Network.HTTP.Lucu")
- False False Nothing Nothing
+ False False Nothing Nothing Nothing
]
⧺
- if useGZip then
- [ ImportDecl (⊥) (ModuleName "Codec.Compression.GZip")
- False False Nothing Nothing
- ]
- else
- []
+ [ ImportDecl (⊥) (ModuleName "Codec.Compression.GZip")
+ False False Nothing Nothing Nothing
+ | useGZip ]
+
+resourceDecl ∷ Name → Bool → [Decl]
+resourceDecl symName useGZip
+ = [ TypeSig (⊥) [symName] (TyCon (UnQual (name "ResourceDef")))
+ , nameBind (⊥) symName valExp
+ ]
+ where
+ valExp ∷ Exp
+ valExp = RecUpdate (function "emptyResource")
+ [ FieldUpdate (UnQual (name "resGet" )) resGet
+ , FieldUpdate (UnQual (name "resHead")) resHead
+ ]
+
+ resGet ∷ Exp
+ resGet | useGZip = resGetGZipped
+ | otherwise = resGetRaw
resHead ∷ Exp
resHead
- = infixApp (var $ name "Just")
- (op $ name "$" )
- (doE [ foundEntityStmt
- , setContentTypeStmt
+ = function "Just" `app`
+ paren (doE [ foundEntityStmt
+ , setContentTypeStmt
+ ])
+
+resGetGZipped ∷ Exp
+resGetGZipped
+ = function "Just" `app`
+ paren (doE [ foundEntityStmt
+ , setContentTypeStmt
+ , bindGZipStmt
+ , conditionalOutputStmt
+ ])
+ where
+ condVarName ∷ Name
+ condVarName = name "gzipAllowed"
+
+ dataVarName ∷ Name
+ dataVarName = name "gzippedData"
+
+ bindGZipStmt ∷ Stmt
+ bindGZipStmt
+ = genStmt (⊥)
+ (pvar condVarName)
+ (function "isEncodingAcceptable" `app` strE "gzip")
+
+ conditionalOutputStmt ∷ Stmt
+ conditionalOutputStmt
+ = qualStmt $
+ If (var condVarName)
+ (doE [ setContentEncodingGZipStmt
+ , putChunksStmt (var dataVarName)
])
+ (putChunksExp
+ (paren
+ (function "decompress" `app` var dataVarName)))
resGetRaw ∷ Exp
resGetRaw
- = infixApp (var $ name "Just")
- (op $ name "$" )
- (doE [ foundEntityStmt
- , setContentTypeStmt
- , outputStmt (var $ name "rawData")
- ])
+ = function "Just" `app`
+ paren (doE [ foundEntityStmt
+ , setContentTypeStmt
+ , putChunksStmt (function "rawData")
+ ])
setContentEncodingGZipStmt ∷ Stmt
setContentEncodingGZipStmt
- = qualStmt $
- metaFunction "setContentEncoding" $
- [ listE [ strE "gzip" ] ]
+ = qualStmt
+ ( function "setContentEncoding"
+ `app`
+ listE [ strE "gzip" ]
+ )
foundEntityStmt ∷ Stmt
foundEntityStmt
= qualStmt $
- metaFunction "foundEntity" $
- [ var $ name "entityTag"
- , var $ name "lastModified"
- ]
+ metaFunction "foundEntity"
+ [ var (name "entityTag")
+ , var (name "lastModified")
+ ]
setContentTypeStmt ∷ Stmt
setContentTypeStmt
- = qualStmt $
- metaFunction "setContentType" $
- [var $ name "contentType"]
+ = qualStmt
+ ( function "setContentType"
+ `app`
+ function "contentType"
+ )
-outputStmt ∷ Exp → Stmt
-outputStmt e
- = qualStmt $
- metaFunction "output" [e]
+putChunksExp ∷ Exp → Exp
+putChunksExp = app (function "putChunks")
+
+putChunksStmt ∷ Exp → Stmt
+putChunksStmt = qualStmt ∘ putChunksExp
entityTagDecl ∷ ETag → [Decl]
-entityTagDecl eTag
+entityTagDecl tag
= [ TypeSig (⊥) [varName] (TyCon (UnQual (name "ETag")))
, nameBind (⊥) varName valExp
]
varName = name "entityTag"
valExp ∷ Exp
- valExp = metaFunction "parseETag" [strE $ eTagToString eTag]
-
- eTagToString ∷ ETag → String
- eTagToString = A.toString ∘ A.fromAsciiBuilder ∘ printETag
+ valExp = function "parseETag" `app` strE (eTagToString tag)
lastModifiedDecl ∷ UTCTime → [Decl]
lastModifiedDecl lastMod
= [ TypeSig (⊥) [varName] (TyCon (UnQual (name "UTCTime")))
, nameBind (⊥) varName valExp
+ , InlineSig (⊥) False AlwaysActive (UnQual varName)
]
where
varName ∷ Name
varName = name "lastModified"
valExp ∷ Exp
- valExp = metaFunction "read" [strE $ show lastMod]
+ valExp = function "read" `app` strE (show lastMod)
contentTypeDecl ∷ MIMEType → [Decl]
contentTypeDecl mime
= [ TypeSig (⊥) [varName] (TyCon (UnQual (name "MIMEType")))
, nameBind (⊥) varName valExp
+ , InlineSig (⊥) False AlwaysActive (UnQual varName)
]
where
varName ∷ Name
varName = name "contentType"
valExp ∷ Exp
- valExp = metaFunction "parseMIMEType" [mimeToString mime]
+ valExp = function "parseMIMEType" `app` strE (mimeToString mime)
mimeToString ∷ MIMEType → String
mimeToString = A.toString ∘ A.fromAsciiBuilder ∘ printMIMEType
dataDecl varName chunks
= [ TypeSig (⊥) [varName] (TyCon (Qual (ModuleName "Lazy") (name "ByteString")))
, nameBind (⊥) varName valExp
+ , InlineSig (⊥) False AlwaysActive (UnQual varName)
]
where
valExp ∷ Exp
`app`
strE (Strict.unpack chunk)
-mkHeader ∷ FilePath → Int64 → Int64 → Bool → MIMEType → String → UTCTime → IO String
-mkHeader srcFile originalLen gzippedLen useGZip mimeType eTag lastMod
+mkHeader ∷ FilePath → Int64 → Int64 → Bool → MIMEType → ETag → UTCTime → IO String
+mkHeader srcFile originalLen gzippedLen useGZip mType tag lastMod
= do localLastMod ← utcToLocalZonedTime lastMod
- return ("{- DO NOT EDIT THIS FILE.\n" ++
- " This file is automatically generated by the lucu-implant-file program.\n" ++
- "\n" ++
- " Source: " ++ (if srcFile ≡ "-"
- then "(stdin)"
- else srcFile) ++ "\n" ++
- " Original Length: " ++ show originalLen ++ " bytes\n" ++
- (if useGZip
- then " Compressed Length: " ++ show gzippedLen ++ " bytes\n" ++
- " Compression: gzip\n"
- else " Compression: disabled\n") ++
- " MIME Type: " ++ show mimeType ++ "\n" ++
- " ETag: " ++ eTag ++ "\n" ++
- " Last Modified: " ++ show localLastMod ++ "\n" ++
- " -}")
-
-
-getModuleName ∷ [CmdOpt] → IO String
+ return $ concat
+ [ "{- DO NOT EDIT THIS FILE.\n"
+ , " This file is automatically generated by the lucu-implant-file program.\n"
+ , "\n"
+ , " Source: ", if srcFile ≡ "-" then
+ "(stdin)"
+ else
+ srcFile
+ , "\n"
+ , " Original Length: ", show originalLen, " bytes\n"
+ , if useGZip then
+ " Compressed Length: " ⧺ show gzippedLen ⧺ " bytes\n" ⧺
+ " Compression: gzip\n"
+ else
+ " Compression: disabled\n"
+ , " MIME Type: ", mimeTypeToString mType, "\n"
+ , " ETag: ", eTagToString tag, "\n"
+ , " Last Modified: ", show localLastMod, "\n"
+ , " -}"
+ ]
+
+eTagToString ∷ ETag → String
+eTagToString = A.toString ∘ A.fromAsciiBuilder ∘ printETag
+
+mimeTypeToString ∷ MIMEType → String
+mimeTypeToString = A.toString ∘ A.fromAsciiBuilder ∘ printMIMEType
+
+getModuleName ∷ [CmdOpt] → IO ModuleName
getModuleName opts
- = let modNameOpts = filter (\ x → case x of
- OptModName _ → True
- _ → False) opts
- in
- case modNameOpts of
- [] → error "a module name must be given."
- (OptModName modName):[] → return modName
- _ → error "too many --module options."
-
-
-getSymbolName ∷ [CmdOpt] → String → IO String
-getSymbolName opts modName
- = let symNameOpts = filter (\ x → case x of
- OptSymName _ → True
- _ → False) opts
- -- モジュール名をピリオドで分割した時の最後の項目の先頭文字を
- -- 小文字にしたものを使ふ。
- defaultSymName = mkDefault modName
- mkDefault = headToLower ∘ getLastComp
- headToLower str = case str of
- [] → error "module name must not be empty"
- (x:xs) → toLower x : xs
- getLastComp = reverse ∘ fst ∘ break (≡ '.') ∘ reverse
- in
- case symNameOpts of
- [] → return defaultSymName
- (OptSymName symName):[] → return symName
- _ → error "too many --symbol options."
+ = case modNameOpts of
+ [] → fail "a module name must be given."
+ OptModName modName:[] → return $ ModuleName modName
+ _ → fail "too many --module options."
+ where
+ modNameOpts ∷ [CmdOpt]
+ modNameOpts = filter (\ x → case x of
+ OptModName _ → True
+ _ → False) opts
+
+getSymbolName ∷ [CmdOpt] → ModuleName → IO Name
+getSymbolName opts (ModuleName modName)
+ = case symNameOpts of
+ [] → return defaultSymName
+ OptSymName symName:[] → return $ name symName
+ _ → fail "too many --symbol options."
+ where
+ symNameOpts ∷ [CmdOpt]
+ symNameOpts = filter (\ x → case x of
+ OptSymName _ → True
+ _ → False) opts
+
+ defaultSymName ∷ Name
+ defaultSymName
+ = name $ headToLower $ getLastComp modName
+
+ headToLower ∷ String → String
+ headToLower [] = error "module name must not be empty"
+ headToLower (x:xs) = toLower x : xs
+ getLastComp ∷ String → String
+ getLastComp = reverse ∘ fst ∘ break (≡ '.') ∘ reverse
getMIMEType ∷ [CmdOpt] → FilePath → IO MIMEType
getMIMEType opts srcFile
= case mimeTypeOpts of
- [] → return defaultType
- (OptMIMEType ty):[] → return $ read ty
- _ → error "too many --mime-type options."
+ [] → return defaultType
+ OptMIMEType ty:[]
+ → case A.fromChars ty of
+ Just a → return $ parseMIMEType a
+ Nothing → fail "MIME type must not contain any non-ASCII letters."
+ _ → fail "too many --mime-type options."
where
mimeTypeOpts ∷ [CmdOpt]
mimeTypeOpts
defaultType = fromMaybe octetStream
$ guessTypeByFileName defaultExtensionMap srcFile
-
getLastModified ∷ FilePath → IO UTCTime
getLastModified "-" = getCurrentTime
getLastModified fpath = (posixSecondsToUTCTime ∘ fromRational ∘ toRational ∘ modificationTime)
<$>
getFileStatus fpath
-
-getETag ∷ [CmdOpt] → Lazy.ByteString → IO String
+getETag ∷ [CmdOpt] → Lazy.ByteString → IO ETag
getETag opts input
- = let eTagOpts = filter (\ x → case x of
- OptETag _ → True
- _ → False) opts
- in
- case eTagOpts of
- [] → fmap (mkETagFromInput ∘ fromJust) (getDigestByName "SHA1")
- (OptETag str):[] → return str
- _ → error "too many --etag options."
+ = case eTagOpts of
+ [] → return mkETagFromInput
+ OptETag str:[] → return $ strToETag str
+ _ → fail "too many --etag options."
where
- mkETagFromInput ∷ Digest → String
- mkETagFromInput sha1 = "SHA-1:" ++ toHex (digestLBS sha1 input)
+ eTagOpts ∷ [CmdOpt]
+ eTagOpts = filter (\ x → case x of
+ OptETag _ → True
+ _ → False) opts
- toHex ∷ String → String
- toHex = foldr ((++) ∘ hexByte ∘ fromEnum) ""
-
- hexByte ∷ Int → String
- hexByte n
- = [ hex4bit ((n `shiftR` 4) .&. 0x0F)
- , hex4bit ( n .&. 0x0F)
- ]
-
- hex4bit ∷ Int → Char
- hex4bit n
- | n < 10 = chr $ ord '0' + n
- | n < 16 = chr $ ord 'a' + n - 10
- | otherwise = (⊥)
+ mkETagFromInput ∷ ETag
+ mkETagFromInput
+ = strToETag $ "SHA-1:" ⧺ showDigest (sha1 input)
+ strToETag ∷ String → ETag
+ strToETag str
+ = case A.fromChars str of
+ Just a → strongETag a
+ Nothing → error "ETag must not contain any non-ASCII letters."
openInput ∷ FilePath → IO Lazy.ByteString
openInput "-" = Lazy.getContents
openInput fpath = Lazy.readFile fpath
-
openOutput ∷ [CmdOpt] → IO Handle
openOutput opts
- = let outputOpts = filter (\ x → case x of
- OptOutput _ → True
- _ → False) opts
- in
- case outputOpts of
- [] → return stdout
- (OptOutput fpath):[] → openFile fpath WriteMode
- _ → error "two many --output options."
+ = case outputOpts of
+ [] → return stdout
+ OptOutput fpath:[] → openFile fpath WriteMode
+ _ → fail "two many --output options."
+ where
+ outputOpts ∷ [CmdOpt]
+ outputOpts = filter (\ x → case x of
+ OptOutput _ → True
+ _ → False) opts
{-
作られるファイルの例 (壓縮されない場合):
Compressed Length: 453 bytes -- これは Compression: disabled の時には無い
Compression: disabled
MIME Type: image/png
- ETag: d41d8cd98f00b204e9800998ecf8427e
+ ETag: "d41d8cd98f00b204e9800998ecf8427e"
Last Modified: 2007-11-05 13:53:42.231882 JST
-}
{-# LANGUAGE OverloadedStrings #-}
, resGet
= Just $ do foundEntity entityTag lastModified
setContentType contentType
- output rawData
+ putChunk rawData
, resHead
= Just $ do foundEntity entityTag lastModified
setContentType contentType
entityTag = strongETag "d41d8cd98f00b204e9800998ecf8427e"
lastModified ∷ UTCTime
+ {-# NOINLINE lastModified #-}
lastModified = read "2007-11-05 04:47:56.008366 UTC"
contentType ∷ MIMEType
+ {-# NOINLINE contentType #-}
contentType = parseMIMEType "image/png"
rawData ∷ Lazy.ByteString
+ {-# NOINLINE rawData #-}
rawData = Lazy.fromChunks
[ B64.decodeLenient "IyEvdXNyL2Jpbi9lbnYgcnVuZ2hjCgppbXBvcnQgRG..."
, B64.decodeLenient "Otb/+DniOlRgAAAAYAAAAGAAAAB/6QOmToAEIGAAAA..."
壓縮される場合は次のやうに變はる:
------------------------------------------------------------------------------
-- import に追加
- import Codec.Compression.GZip
+ import Codec.Compression.Zlib
-- ResourceDef は次のやうに變化
baz ∷ ResourceDef
= Just $ do foundEntity entityTag lastModified
setContentType contentType
- gzip ← isEncodingAcceptable "gzip"
- if gzip then
+ gzipAllowed ← isEncodingAcceptable "gzip"
+ if gzipAllowed then
do setContentEncoding ["gzip"]
- output gzippedData
+ putChunks gzippedData
else
- output (decompress gzippedData)
+ putChunks (decompress gzippedData)
, resHead
= Just $ do foundEntity entityTag lastModified
setContentType contentType
, resPut = Nothing
, resDelete = Nothing
}
-
+
-- rawData の代はりに gzippedData
gzippedData ∷ Lazy.ByteString
+ {-# NOINLINE gzippedData #-}
gzippedData = Lazy.fromChunks
[ B64.decodeLenient "IyEvdXNyL2Jpbi9lbnYgcnVuZ2hjCgppbXBvcnQ..."
, B64.decodeLenient "Otb/+DniOlRgAAAAYAAAAGAAAAB/6QOmToAEIGA..."
projects / Lucu.git / blobdiff