servant-server

A family of combinators for defining webservices APIs and serving them

http://haskell-servant.github.io/

Version on this page:	0.6.1
LTS Haskell 23.23:	0.20.2@rev:1
Stackage Nightly 2025-05-24:	0.20.2@rev:1
Latest on Hackage:	0.20.2@rev:1

See all snapshots servant-server appears in

BSD-3-Clause licensed by Servant Contributors

Maintained by [email protected]

This version can be pinned in stack with:servant-server-0.6.1@sha256:d5a9e86174f304853fac91d245755beea94300d7b55045eb45d8ce65d9959a91,4475

Module documentation for 0.6.1

Servant
- Servant.Server
  - Servant.Server.Experimental
    - Servant.Server.Experimental.Auth
  - Servant.Server.Internal
- Servant.Utils
  - Servant.Utils.StaticFiles

Depends on 27 packages(full list with versions):

Used by 6 packages in nightly-2016-05-07(full list with versions):

avers-server, dixi, servant-js, servant-JuicyPixels, servant-mock, servant-server

servant-server

servant

This library lets you implement an HTTP server with handlers for each endpoint of a servant API, handling most of the boilerplate for you.

Getting started

We’ve written a tutorial guide that introduces the core types and features of servant. After this article, you should be able to write your first servant webservices, learning the rest from the haddocks’ examples.

Changes

0.6

Query parameters that can’t be parsed result in a 400 (was 404).

0.5

Add Config machinery (https://github.com/haskell-servant/servant/pull/327). This is a breaking change, as the signatures of both route, serve and the typeclass HasServer now take an additional parameter.
Support for the HttpVersion, IsSecure, RemoteHost and Vault combinators
Drop EitherT in favor of ExceptT
Use http-api-data instead of Servant.Common.Text
Remove matrix params.
Remove RouteMismatch.
Redefined constructors of RouteResult.
Added Delayed and related functions (addMethodCheck, addAcceptCheck, addBodyCheck, runDelayed)
Added support for Basic Authentication
Add generalized authentication support via the AuthServerData type family and AuthHandler handler

0.4.1

Bump attoparsec upper bound to < 0.14
Bump wai-app-static upper bound to < 3.2
Bump either upper bound to < 4.5

0.4

Delete now is like Get, Post, Put, and Patch and returns a response body
Add a RouteMismatch constructor for arbitrary HTTP response codes (https://github.com/haskell-servant/servant-server/pull/22)
Add support for the Patch combinator
Support for Accept/Content-type headers and for the content-type aware combinators in servant-0.4
Export toApplication from Servant.Server (https://github.com/haskell-servant/servant-server/pull/29)
Support other Monads than just EitherT (Int, String) IO (https://github.com/haskell-servant/servant-server/pull/21)
Make methods return status code 204 if they return () (https://github.com/haskell-servant/servant-server/issues/28)
Add server support for response headers
Use ServantErr instead of (Int,String) in EitherT handlers
Add errXXX functions for HTTP errors with sensible default reason strings
Add enter function for applying natural transformations to handlers

0.2.4

Added support for matrix parameters, see e.g. http://www.w3.org/DesignIssues/MatrixURIs.html
Add support for serializing based on Accept header (https://github.com/haskell-servant/servant-server/issues/9)
Ignore trailing slashes (https://github.com/haskell-servant/servant-server/issues/5)

0.2.3

Fix consuming request body issue (https://github.com/haskell-servant/servant/issues/3)
Make code sample in Servant.Server complete