[Haskell] Announce: Haskell XML-RPC library

[Bjorn Bringert]

Announcement: Haskell XML-RPC library
----------------------------------------------------------------------

I have written a Haskell XML-RPC client and server library which is 
available from:

http://www.dtek.chalmers.se/~d00bring/haskell-xml-rpc/

XML-RPC (http://www.xmlrpc.com/) is "remote procedure calling using HTTP
as the transport and XML as the encoding. XML-RPC is designed to be as
simple as possible, while allowing complex data structures to be
transmitted, processed and returned."


Library features:

- Easy to use interface, see code examples below.

- Lower-level interface for explicit conversion between XML-RPC and
Haskell types, e.g. to support heterogeneous arrays and structs.

- Support for XML-RPC introspection in both client and server. Remote
method declarations can be generated by using introspection, see
test/make-stubs.hs.

- Support for HTTP authentication.


Code examples:

This is a simple CGI-based server with only one method that takes two
integers and returns their sum:

> import Network.XmlRpc.Server
>
> add :: Int -> Int -> IO Int
> add x y = return (x + y)
>
> main = cgiXmlRpcServer [("examples.add", fun add)]

This is a client that calls the method implemented by the server above
and prints the result:

> import Network.XmlRpc.Client
>
> server = "http://localhost/~bjorn/cgi-bin/simple_server"
>
> add :: Int -> Int -> IO Int
> add = remote server "examples.add"
>
> main = do
>        let x = 4
>            y = 7
>        z <- add x y
>        putStrLn (show x ++ " + " ++ show y ++ " = " ++ show z)


Requirements:

- GHC >= 6.01 or Hugs >= Nov2003
- HaXml >= 1.10


All comments, suggestions, bug reports and flames are welcome.


Yours truly,

Bjorn Bringert