使用FSharp获取Facebook身份验证令牌

Question

我正在尝试使用以下代码从Facebook获取OAuth令牌：

let applicationId = "12345"
let applicationSecret = "12345"

let tokenBuilder = new StringBuilder()
tokenBuilder.Append("https://graph.facebook.com/v2.3/oauth/access_token?")
tokenBuilder.Append("client_id=")
tokenBuilder.Append(applicationId)
tokenBuilder.Append("&redirect_uri=")
tokenBuilder.Append("https://www.facebook.com/connect/login_success.html")
tokenBuilder.Append("&client_secret=")
tokenBuilder.Append(applicationSecret)

let tokenUri = tokenBuilder.ToString()
let tokenClient = new WebClient()
let tokenResponse = tokenClient.UploadString(tokenUri,String.Empty)

运行它时，我得到以下信息：

System.Net.WebException：远程服务器返回错误：（400）错误的请求。

谁能告诉我我在做什么错？ 我可以为应用程序进行很多配置，例如：

Answer 1

不完全是您问题的答案，但这是如何使用来自Facebook SDK的FacebookClient获取OAuth2承载令牌：

// nuget Facebook package
open Facebook
type Credentials() = // There are better ways around to make a POCO, anyways...
    member __.client_id with get() = "...your facebook app id here"
    member __.client_secret with get() = "...your facebook app secret here"
    member __.grant_type with get() = "client_credentials"

let fb = FacebookClient()     
let token = fb.Get("oauth/access_token", Credentials())

重新获得token ，例如：

seq [[access_token, 239907752864330+s3c5obp-fO7DoVX4pPiN69OdAS4]]