Perform an HTTP request and return the body as a ByteString.

Since: 2.2.4

Perform an HTTP request and return the body as a lazy ByteString. Note that the entire value will be read into memory at once (no lazy I/O will be performed). The advantage of a lazy ByteString here (versus using httpBS) is--if needed--a better in-memory representation.

Since: 2.1.10

Perform an HTTP request and ignore the response body.

Since: 2.2.2

Perform an HTTP request and parse the body as JSON. In the event of an JSON parse errors, a JSONException runtime exception will be thrown.

NOTE: Depends on the aeson cabal flag being enabled

Since: 2.1.10

Perform an HTTP request and parse the body as JSON. In the event of an JSON parse errors, a Left value will be returned.

NOTE: Depends on the aeson cabal flag being enabled

Since: 2.1.10

Perform an HTTP request and consume the body with the given Sink

Since: 2.1.10

Perform an HTTP request, and get the response body as a Source.

The second argument to this function tells us how to make the Source from the Response itself. This allows you to perform actions with the status or headers, for example, in addition to the raw bytes themselves. If you just care about the response body, you can use getResponseBody as the second argument here.

{-# LANGUAGE OverloadedStrings #-}
import           Control.Monad.IO.Class       (liftIO)
import           Control.Monad.Trans.Resource (runResourceT)
import           Data.Conduit                 (($$))
import qualified Data.Conduit.Binary          as CB
import qualified Data.Conduit.List            as CL
import           Network.HTTP.Simple
import           System.IO                    (stdout)

main :: IO ()
main =
    runResourceT
        $ httpSource "http://httpbin.org/robots.txt" getSrc
       $$ CB.sinkHandle stdout
  where
    getSrc res = do
        liftIO $ print (getResponseStatus res, getResponseHeaders res)
        getResponseBody res

Since: 2.2.1

Perform an action with the given request. This employes the bracket pattern.

This is similar to httpSource, but does not require MonadResource and allows the result to not contain a ConduitM value.

Since: 2.2.3

Header

Query.

General form: a=b&c=d, but if the value is Nothing, it becomes a&c=d.

Query item

All information on how to connect to a host and what should be sent in the HTTP request.

If you simply wish to download from a URL, see parseRequest.

The constructor for this data type is not exposed. Instead, you should use either the defaultRequest value, or parseRequest to construct from a URL, and then use the records below to make modifications. This approach allows http-client to add configuration options without breaking backwards compatibility.

For example, to construct a POST request, you could do something like:

initReq <- parseRequest "http://www.example.com/path"
let req = initReq
            { method = "POST"
            }

For more information, please see http://www.yesodweb.com/book/settings-types.

Since 0.1.0

Request Headers

A simple representation of the HTTP response.

Since 0.1.0

Response Headers

An exception that can occur when parsing JSON

NOTE: Depends on the aeson cabal flag being enabled

Since: 2.1.10

An exception which may be generated by this library

Since: http-client-0.5.0

Define a HTTP proxy, consisting of a hostname and port number.

A default request value, a GET request of localhost/:80, with an empty request body.

Note that the default checkResponse does nothing.

Since: http-client-0.4.30

Convert a URL into a Request.

This function defaults some of the values in Request, such as setting method to GET and requestHeaders to [].

Since this function uses MonadThrow, the return monad can be anything that is an instance of MonadThrow, such as IO or Maybe.

You can place the request method at the beginning of the URL separated by a space, e.g.:

@@ parseRequest "POST http://httpbin.org/post" @@

Note that the request method must be provided as all capital letters.

A Request created by this function won't cause exceptions on non-2XX response status codes.

To create a request which throws on non-2XX status codes, see parseUrlThrow

Since: http-client-0.4.30

Same as parseRequest, but parse errors cause an impure exception. Mostly useful for static strings which are known to be correctly formatted.

Same as parseRequest, except will throw an HttpException in the event of a non-2XX response. This uses throwErrorStatusCodes to implement checkResponse.

Exactly the same as parseUrlThrow, but has a name that is more consistent with the other parseRequest functions.

Since: 2.3.2

Same as parseRequestThrow, but parse errors cause an impure exception. Mostly useful for static strings which are known to be correctly formatted.

Since: 2.3.2

Set the request method

Since: 2.1.10

Set whether this is a secureHTTPS (True) or insecureHTTP (False) request

Since: 2.1.10

Set the destination host of the request

Since: 2.1.10

Set the destination port of the request

Since: 2.1.10

Lens for the requested path info of the request

Since: 2.1.10

Add a request header name/value combination

Since: 2.1.10

Get all request header values for the given name

Since: 2.1.10

Set the given request header to the given list of values. Removes any previously set header values with the same name.

Since: 2.1.10

Set the request headers, wiping out all previously set headers. This means if you use setRequestHeaders to set some headers and also use one of the other setters that modifies the content-type header (such as setRequestBodyJSON), be sure that setRequestHeaders is evaluated first.

Since: 2.1.10

Set the query string parameters

Since: 2.1.10

Get the query string parameters

Since: 2.1.10

Add to the existing query string parameters.

Since: 2.3.5

Set the request body to the given RequestBody. You may want to consider using one of the convenience functions in the modules, e.g. requestBodyJSON.

Note: This will not modify the request method. For that, please use requestMethod. You likely don't want the default of GET.

Since: 2.1.10

Set the request body as a JSON value

Note: This will not modify the request method. For that, please use requestMethod. You likely don't want the default of GET.

This also sets the Content-Type to application/json; charset=utf-8

NOTE: Depends on the aeson cabal flag being enabled

Since: 2.1.10

Set the request body as a lazy ByteString

Note: This will not modify the request method. For that, please use requestMethod. You likely don't want the default of GET.

Since: 2.1.10

Set the request body as a Source

Note: This will not modify the request method. For that, please use requestMethod. You likely don't want the default of GET.

Since: 2.1.10

Set the request body as a file

Note: This will not modify the request method. For that, please use requestMethod. You likely don't want the default of GET.

Since: 2.1.10

Set the request body as URL encoded data

Note: This will change the request method to POST and set the content-type to application/x-www-form-urlencoded

Since: 2.1.10

Modify the request so that non-2XX status codes do not generate a runtime StatusCodeException.

Since: http-client-0.4.29

Modify the request so that non-2XX status codes generate a runtime StatusCodeException, by using throwErrorStatusCodes

Since: http-client-0.5.13

Set basic auth with the given username and password

Since: 2.1.10

Instead of using the default global Manager, use the supplied Manager.

Since: 2.1.10

Override the default proxy server settings

Since: 2.1.10

Set the maximum time to wait for a response

Since: 2.3.8

Get the status of the response

Since: 2.1.10

Get the integral status code of the response

Since: 2.1.10

Get all response header values with the given name

Since: 2.1.10

Get all response headers

Since: 2.1.10

Get the response body

Since: 2.1.10

Alternate spelling of httpLBS

Since: 2.1.10