Data.Conduit.Text

NOTE It is recommended to start using Data.Conduit.Combinators instead of this module.

Copyright: 2011 Michael Snoyman, 2010-2011 John Millikin License: MIT

Handle streams of text.

Parts of this code were taken from enumerator and adapted for conduits.

For many purposes, it's recommended to use the conduit-combinators library, which provides a more complete set of functions.

Text codecs

data Codec

A specific character encoding.

Since 0.3.0

Instances

Show Codec

Defined in Data.Conduit.Text

Methods

showsPrec :: Int -> Codec -> ShowS

show :: Codec -> String

showList :: [Codec] -> ShowS

encode :: MonadThrow m => Codec -> ConduitT Text ByteString m ()

Convert text into bytes, using the provided codec. If the codec is not capable of representing an input character, an exception will be thrown.

Since 0.3.0

decode :: MonadThrow m => Codec -> ConduitT ByteString Text m ()

Convert bytes into text, using the provided codec. If the codec is not capable of decoding an input byte sequence, an exception will be thrown.

Since 0.3.0

utf8 :: Codec

Since 0.3.0

utf16_le :: Codec

Since 0.3.0

utf16_be :: Codec

Since 0.3.0

utf32_le :: Codec

Since 0.3.0

utf32_be :: Codec

Since 0.3.0

ascii :: Codec

Since 0.3.0

iso8859_1 :: Codec

Since 0.3.0

lines :: Monad m => ConduitT Text Text m ()

Emit each line separately

Since 0.4.1

linesBounded :: MonadThrow m => Int -> ConduitT Text Text m ()

Variant of the lines function with an integer parameter. The text length of any emitted line never exceeds the value of the parameter. Whenever this is about to happen a LengthExceeded exception is thrown. This function should be used instead of the lines function whenever we are dealing with user input (e.g. a file upload) because we can't be sure that user input won't have extraordinarily large lines which would require large amounts of memory if consumed.

data TextException

Since 0.3.0

Constructors

DecodeException Codec Word8

EncodeException Codec Char

LengthExceeded Int

TextException SomeException

NewDecodeException !Text !Int !ByteString

Instances

Show TextException

Defined in Data.Conduit.Text

Methods

showsPrec :: Int -> TextException -> ShowS

show :: TextException -> String

showList :: [TextException] -> ShowS

Exception TextException

Defined in Data.Conduit.Text

Methods

toException :: TextException -> SomeException

fromException :: SomeException -> Maybe TextException

displayException :: TextException -> String

takeWhile :: Monad m => (Char -> Bool) -> ConduitT Text Text m ()

Since 1.0.8

dropWhile :: Monad m => (Char -> Bool) -> ConduitT Text o m ()

Since 1.0.8

take :: Monad m => Int -> ConduitT Text Text m ()

Since 1.0.8

drop :: Monad m => Int -> ConduitT Text o m ()

Since 1.0.8

foldLines :: Monad m => (a -> ConduitM Text o m a) -> a -> ConduitT Text o m a

Since 1.0.8

withLine :: Monad m => ConduitT Text Void m a -> ConduitT Text o m (Maybe a)

Since 1.0.8

decodeUtf8 :: forall (m :: Type -> Type). MonadThrow m => ConduitT ByteString Text m ()

Decode a stream of binary data as UTF8.

Since: conduit-1.3.0

decodeUtf8Lenient :: forall (m :: Type -> Type). Monad m => ConduitT ByteString Text m ()

Decode a stream of binary data as UTF8, replacing any invalid bytes with the Unicode replacement character.

Since: conduit-1.3.0

encodeUtf8 :: forall (m :: Type -> Type) text binary. (Monad m, Utf8 text binary) => ConduitT text binary m ()

Encode a stream of text as UTF8.

Subject to fusion

Since: conduit-1.3.0

detectUtf :: MonadThrow m => ConduitT ByteString Text m ()

Automatically determine which UTF variant is being used. This function checks for BOMs, removing them as necessary. It defaults to assuming UTF-8.

Since 1.1.9