Headroom.IO.Network

Module providing support to perform selected network IO operations, such as downloading file content, etc.

Type Aliases

type DownloadContentFn m

Arguments

 = URI

URI of remote resource

-> m ByteString

downloaded content

Type of a function that returns content of remote resource.

Polymorphic Record

data Network m

Polymorphic record of functions performing network IO operations.

Constructors

Network

Fields

• nDownloadContent :: DownloadContentFn m

  downloads remote content

mkNetwork :: MonadIO m => Network m

Constructs new Network that performs real network IO operations.

Network IO operations

downloadContent

Arguments

:: MonadIO m

=> URI

URI of remote resource

-> m ByteString

downloaded content

Downloads content of remote resource as ByteString. Note that only http and https protocols are supported at this moment.

Error Data Types

data NetworkError

Error related to network operations.

Constructors

ConnectionFailure URI Text

connection failure

InvalidStatus URI Int Text

invalid response status

InvalidURL URI

given URI is not valid

Instances

Eq NetworkError

Defined in Headroom.IO.Network

Methods

(==) :: NetworkError -> NetworkError -> Bool

(/=) :: NetworkError -> NetworkError -> Bool

Show NetworkError

Defined in Headroom.IO.Network

Methods

showsPrec :: Int -> NetworkError -> ShowS

show :: NetworkError -> String

showList :: [NetworkError] -> ShowS

Exception NetworkError

Defined in Headroom.IO.Network

Methods

toException :: NetworkError -> SomeException

fromException :: SomeException -> Maybe NetworkError

displayException :: NetworkError -> String