[UWP] 實作Oauth 2.0登陸取得AMAZON使用者帳戶資訊

前言:

有玩過臉書的人一定有過以下經驗, 當我們想在臉書上完算命或心理測驗的小遊戲時

就會被要求先登錄臉書的在後才能使用該服務, 這就是臉書的Oauth 2.0 認證機制

透過臉書提供的API讓程式導引使用者做認證, 進一步的授權給程式去取得使用者的資料


而Amazon也有提供類似的服務

首先到Login With Amazon 註冊應用程式

Step 1. 打開Amazon Developer Console

https://developer.amazon.com/home.html


Step 2. 選擇 App Service/ Login With Amazon

Step 3. 註冊應用程式

註冊完後會得到 Client Id 以及 Client Secret如下

Step 4. 設定Redirect Url

選擇Web Settings, 在Allowed Return Urls填入 https://localhost

UWP 的部分

以Amazon提供的API取得access token

API 規則

https://www.amazon.com/ap/oa?client_id=YOUR_CLIENT_ID
&scope=profile 
&response_type=token 
&redirect_uri=https://localhost

程式範例:

	try
	{
	//here is your client ID
	String clientID = "amzn1.application-oa2-client.39847938475iHOHOIUSYDUIFYIUAJH";
	string redirectUrl = "https://localhost";
	string baseUrl =
	"https://amazon.com/ap/oa?" +
	"client_id=" + clientID +
	"&response_type=token" +
	"&scope=profile" +
	"&redirect_uri=" + redirectUrl;
	var uri = new Uri(baseUrl);
	var redirectUri = new Uri(redirectUrl);
	WebAuthenticationResult webAuthenticationResult = await WebAuthenticationBroker.AuthenticateAsync(WebAuthenticationOptions.None, uri, redirectUri);
	if (webAuthenticationResult.ResponseStatus == WebAuthenticationStatus.Success)
	{
	//Get & Store Access Token first
	string webAuthResultResponseData = webAuthenticationResult.ResponseData.ToString();
	_token = webAuthResultResponseData
	.Split('&')
	.FirstOrDefault( s=> s.Contains("token="))
	.Split('=')[1];
	}
	else
	{
	MessageDialog dialog = new MessageDialog("Error message by AuthenticateAsync(): " + webAuthenticationResult.ResponseStatus.ToString());
	await dialog.ShowAsync();
	}
	}
	catch (Exception Error)
	{
	MessageDialog dialog = new MessageDialog("Error message by exception: " + Error.Message);
	await dialog.ShowAsync();
	}

view raw LoginWithAmazon.cs hosted with ❤ by GitHub

取得Amazon使用者資料

API 規則

https://api.amazon.com/user/profile?access_token=YOUR_ACCEES_TOKEN

程式範例:

	using (HttpClient httpclient = new HttpClient())
	{
	var response = await httpclient.GetStringAsync(new Uri("https://api.amazon.com/user/profile?access_token=" + _token));
	var obj = new JsonObject();
	if (JsonObject.TryParse(response, out obj))
	{
	MessageDialog dialog = new MessageDialog($"UserName:{obj.GetNamedString("name")}, UserEmail:{obj.GetNamedString("email")}", "User Information");
	await dialog.ShowAsync();
	}
	}

view raw LWA_GetUserProfile.cs hosted with ❤ by GitHub

DEMO:

點擊 Login

點擊Show user data

若需要完整的程式碼也可以到以下的網址下載


完整程式碼