Safe Haskell	None
Language	Haskell2010

Network.HTTP.Client.MultipartFormData

Contents

Part type
Constructing parts
Headers
Building form data
Boundary
Misc

Description

This module handles building multipart/form-data. Example usage:

{-# LANGUAGE OverloadedStrings #-}
import Network
import Network.HTTP.Client
import Network.HTTP.Client.MultipartFormData

import Data.Text.Encoding as TE

import Control.Monad

main = withSocketsDo $ void $ withManager defaultManagerSettings $ \m -> do
    req1 <- parseUrl "http://random-cat-photo.net/cat.jpg"
    res <- httpLbs req1 m
    req2 <- parseUrl "http://example.org/~friedrich/blog/addPost.hs"
    flip httpLbs m =<<
        (formDataBody [partBS "title" "Bleaurgh"
                      ,partBS "text" $ TE.encodeUtf8 "矢田矢田矢田矢田矢田"
                      ,partFileSource "file1" "/home/friedrich/Photos/MyLittlePony.jpg"
                      ,partFileRequestBody "file2" "cat.jpg" $ RequestBodyLBS $ responseBody res]
            req2)

Synopsis

Part type

data Part Source

A single part of a multipart message.

Instances

Show Part Source

partName :: Part -> Text Source

Name of the corresponding <input>

partFilename :: Part -> Maybe String Source

A file name, if this is an attached file

partContentType :: Part -> Maybe MimeType Source

Content type

partHeaders :: Part -> [Header] Source

List of additional headers

partGetBody :: Part -> IO RequestBody Source

Action in m which returns the body of a message.

Constructing parts

partBS Source

Arguments

:: Text	Name of the corresponding <input>.
-> ByteString	The body for this `Part`.
-> Part

Make a Part whose content is a strict ByteString.

The Part does not have a file name or content type associated with it.

partLBS Source

Arguments

:: Text	Name of the corresponding <input>.
-> ByteString	The body for this `Part`.
-> Part

Make a Part whose content is a lazy ByteString.

The Part does not have a file name or content type associated with it.

partFile Source

Arguments

:: Text	Name of the corresponding <input>.
-> FilePath	The name of the local file to upload.
-> Part

Make a Part from a file.

The entire file will reside in memory at once. If you want constant memory usage, use partFileSource.

The FilePath supplied will be used as the file name of the Part. If you do not want to reveal this name to the server, you must remove it prior to uploading.

The Part does not have a content type associated with it.

partFileSource Source

Arguments

:: Text	Name of the corresponding <input>.
-> FilePath	The name of the local file to upload.
-> Part

Stream a Part from a file.

The FilePath supplied will be used as the file name of the Part. If you do not want to reveal this name to the server, you must remove it prior to uploading.

The Part does not have a content type associated with it.

partFileSourceChunked :: Text -> FilePath -> Part Source

partFileSourceChunked will read a file and send it in chunks.

Note that not all servers support this. Only use partFileSourceChunked if you know the server you're sending to supports chunked request bodies.

The FilePath supplied will be used as the file name of the Part. If you do not want to reveal this name to the server, you must remove it prior to uploading.

The Part does not have a content type associated with it.

partFileRequestBody Source

Arguments

:: Text	Name of the corresponding <input>.
-> FilePath	File name to supply to the server.
-> RequestBody	Data to upload.
-> Part

Construct a Part from form name, filepath and a RequestBody

partFileRequestBody "who_calls" "caller.json" $ RequestBodyBS "{\"caller\":\"Jason J Jason\"}"

-- empty upload form
partFileRequestBody "file" mempty mempty

The Part does not have a content type associated with it.

partFileRequestBodyM Source

Arguments

:: Text	Name of the corresponding <input>.
-> FilePath	File name to supply to the server.
-> IO RequestBody	Action that will supply data to upload.
-> Part

Construct a Part from action returning the RequestBody

partFileRequestBodyM "cat_photo" "haskell-the-cat.jpg" $ do
    size <- fromInteger <$> withBinaryFile "haskell-the-cat.jpg" ReadMode hFileSize
    return $ RequestBodySource size $ CB.sourceFile "haskell-the-cat.jpg" $= CL.map fromByteString

The Part does not have a content type associated with it.