OverloadedStrings
, UnicodeSyntax
#-}
--- |Manipulation of entity tags.
+-- |Entity tags
module Network.HTTP.Lucu.ETag
( ETag(..)
, parseETag
import Network.HTTP.Lucu.Utils
import Prelude.Unicode
--- |An entity tag is made of a weakness flag and a opaque string.
+-- |An entity tag consists of a weakness flag and an opaque string.
data ETag = ETag {
-- |The weakness flag. Weak tags looks like W\/\"blahblah\" and
- -- strong tags are like \"blahblah\".
+ -- strong tags are like \"blahblah\". See:
+ -- <http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.3.3>
etagIsWeak ∷ !Bool
-- |An opaque string. Only characters from 0x20 (sp) to 0x7e (~)
-- are allowed.
, etagToken ∷ !Ascii
} deriving (Eq, Show)
--- |Convert an 'ETag' to 'AsciiBuilder'.
+-- |Convert an 'ETag' to an 'AsciiBuilder'.
printETag ∷ ETag → AsciiBuilder
{-# INLINEABLE printETag #-}
printETag et
endOfInput
return et
--- |This is equivalent to @'ETag' 'Prelude.False'@. If you want to
--- generate an ETag from a file, try using
+-- |This is equivalent to @'ETag' 'False'@. If you want to generate an
+-- ETag from a file, try using
-- 'Network.HTTP.Lucu.StaticFile.generateETagFromFile'.
strongETag ∷ Ascii → ETag
{-# INLINE strongETag #-}
strongETag = ETag False
--- |This is equivalent to @'ETag' 'Prelude.True'@.
+-- |This is equivalent to @'ETag' 'True'@.
weakETag ∷ Ascii → ETag
{-# INLINE weakETag #-}
weakETag = ETag True
+-- |'Parser' for an 'ETag'.
eTagP ∷ Parser ETag
{-# INLINEABLE eTagP #-}
eTagP = do isWeak ← option False (string "W/" *> return True)
str ← quotedStr
return $ ETag isWeak str
+-- |'Parser' for a list of 'ETag's.
eTagListP ∷ Parser [ETag]
{-# INLINEABLE eTagListP #-}
eTagListP = do xs ← listOf eTagP