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elk/libraries/Http.elm
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1module Http where
2{-| A library for asynchronous HTTP requests. See the `WebSocket`
3library if you have very strict latency requirements.
5# Sending Requests
6@docs send, sendGet
8# Creating Requests
9@docs get, post, request
11# Responses
12@docs Response
13-}
15import Signal (..)
16import Native.Http
18{-| The datatype for responses. Success contains only the returned message.
19Failures contain both an error code and an error message.
20-}
21type Response a
22 = Success a
23 | Waiting
24 | Failure Int String
26type alias Request a = {
27 verb : String,
28 url : String,
29 body : a,
30 headers : [(String,String)]
31 }
33{-| Create a customized request. Arguments are request type (get, post, put,
34delete, etc.), target url, data, and a list of additional headers.
35-}
36request : String -> String -> String -> [(String,String)] -> Request String
37request = Request
39{-| Create a GET request to the given url. -}
40get : String -> Request String
41get url = Request "GET" url "" []
43{-| Create a POST request to the given url, carrying the given data. -}
44post : String -> String -> Request String
45post url body = Request "POST" url body []
47{-| Performs an HTTP request with the given requests. Produces a signal
48that carries the responses.
49-}
50send : Signal (Request a) -> Signal (Response String)
51send = Native.Http.send
53{-| Performs an HTTP GET request with the given urls. Produces a signal
54that carries the responses.
55-}
56sendGet : Signal String -> Signal (Response String)
57sendGet reqs = send (lift get reqs)