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F# の http クライアントの使い方 (Get)

Last updated at Posted at 2018-03-08

RestSharp.dll というライブラリーを使います。
RestSharp.dll へのシンボリックリンクを コンパイル、実行するフォルダー内に作成します。

http_get.fs
// ----------------------------------------------------------------
//
//	http_get.fs
//
//						Mar/08/2018
//
// ----------------------------------------------------------------
open System
open RestSharp
// ----------------------------------------------------------------
[<EntryPoint>]
let main argv =
    Console.Error.WriteLine("*** 開始 ***") 

    let host_in = "https://httpbin.org"
    printfn "host_in = %s" host_in

    let client = new RestClient(host_in)
    let request = new RestRequest("/get", Method.GET)
    let response = client.Execute(request)
    let content = response.Content
    printfn "%s" content

    Console.Error.WriteLine("*** 終了 ***") 
    0
// ----------------------------------------------------------------
Makefile
http_get.exe : http_get.fs
	fsharpc http_get.fs -r:RestSharp.dll
clean:
	rm -f *.exe

コンパイル

$ make
fsharpc http_get.fs -r:RestSharp.dll
F# Compiler for F# 4.0 (Open Source Edition)
Freely distributed under the Apache 2.0 Open Source License

実行結果

$ mono ./http_get.exe
*** 開始 ***
host_in = https://httpbin.org
{
  "args": {}, 
  "headers": {
    "Accept": "application/json, application/xml, text/json, text/x-json, text/javascript, text/xml", 
    "Accept-Encoding": "gzip, deflate", 
    "Content-Length": "0", 
    "Host": "httpbin.org", 
    "User-Agent": "RestSharp 104.1.0.0", 
    "X-Amzn-Trace-Id": "Root=1-62ef3c35-114a557008ed9e653a2a142b"
  }, 
  "origin": "219.126.135.211", 
  "url": "https://httpbin.org/get"
}

*** 終了 ***

Post の例はこちら
F# の http クライアントの使い方 (Post)

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