/// <summary>
/// 分析認證通過後的字串，並且取得使用者詳細資訊，最後需要建立 Account 物件
/// </summary>
/// <param name="code"></param>
/// <returns></returns>
private static async Task <Account> ConvertCodeToAccount(string code)
{
OAuth2AuthenticatorParameter fooPara = new OAuth2AuthenticatorParameter();
#region 依據指定的 OAuth2 認證方式，取得該認證要用到的相關參數
if (AuthenticationHelper.OAuthType == OAuthTypeEnum.Google)
{
fooPara = AuthenticationHelper.OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Google);
}
else if (AuthenticationHelper.OAuthType == OAuthTypeEnum.Facebook)
{
fooPara = AuthenticationHelper.OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Facebook);
}
#endregion
var fooauthorizeUrl = fooPara.authorizeUrl;
var fooredirectUrl = fooPara.redirectUrl;
var fooaccessTokenUrl = fooPara.accessTokenUrl;
var fooclientId = fooPara.clientId;
var fooclientSecret = fooPara.clientSecret;
var fooscope = fooPara.scope;
#region 取得 使用者詳細資訊
var httpClient = new System.Net.Http.HttpClient();
var content = new FormUrlEncodedContent(new Dictionary <string, string> {
{ "code", code },
{ "client_id", fooPara.clientId },
{ "client_secret", fooPara.clientSecret },
{ "redirect_uri", fooPara.redirectUrl },
{ "grant_type", "authorization_code" },
});
var accessTokenResponse = await httpClient.PostAsync((fooPara.accessTokenUrl), content);
var fooRetStr = await accessTokenResponse.Content.ReadAsStringAsync();
#endregion
var FooresponseDict = JsonConvert.DeserializeObject <AccessTokenResponse>(fooRetStr);
var responseDict = new Dictionary <string, string>
{
{ Constants.access_tokenAccountProperty, FooresponseDict.access_token },
{ Constants.expires_inAccountProperty, FooresponseDict.expires_in },
{ Constants.token_typeAccountProperty, FooresponseDict.token_type },
//{"id_token",FooresponseDict.id_token},
};
return(new Account(null, responseDict));
}
/// <summary>
/// OnElementChanged method is called when the corresponding Xamarin.Forms control is created.
/// </summary>
/// <param name="e"></param>
protected override void OnElementChanged(ElementChangedEventArgs <Page> e)
{
base.OnElementChanged(e);
if (_isShown)
{
return;
}
_isShown = true;
OAuth2Authenticator auth;
OAuth2AuthenticatorParameter fooPara = new OAuth2AuthenticatorParameter();
#region 依據指定的 OAuth2 認證方式，取得該認證要用到的相關參數
if (AuthenticationHelper.OAuthType == OAuthTypeEnum.Google)
{
fooPara = AuthenticationHelper.OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Google);
}
else if (AuthenticationHelper.OAuthType == OAuthTypeEnum.Facebook)
{
fooPara = AuthenticationHelper.OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Facebook);
}
#endregion
var fooauthorizeUrl = fooPara.authorizeUrl;
var fooredirectUrl = fooPara.redirectUrl;
var fooaccessTokenUrl = fooPara.accessTokenUrl;
var fooclientId = fooPara.clientId;
var fooclientSecret = fooPara.clientSecret;
var fooscope = fooPara.scope;
auth = new OAuth2Authenticator(
fooclientId,
fooclientSecret,
fooscope,
new Uri(fooauthorizeUrl),
new Uri(fooredirectUrl),
new Uri(fooaccessTokenUrl));
auth.Completed += OnAuthenticationCompleted;
// Display the UI
var activity = Context as Activity;
activity?.StartActivity(auth.GetUI(activity));
}
public override void ViewDidAppear(bool animated)
{
base.ViewDidAppear(animated);
if (_isShown)
{
return;
}
_isShown = true;
OAuth2Authenticator auth;
OAuth2AuthenticatorParameter fooPara = new OAuth2AuthenticatorParameter();
#region 依據指定的 OAuth2 認證方式，取得該認證要用到的相關參數
if (AuthenticationHelper.OAuthType == OAuthTypeEnum.Google)
{
fooPara = AuthenticationHelper.OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Google);
}
else if (AuthenticationHelper.OAuthType == OAuthTypeEnum.Facebook)
{
fooPara = AuthenticationHelper.OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Facebook);
}
#endregion
var fooauthorizeUrl = fooPara.authorizeUrl;
var fooredirectUrl = fooPara.redirectUrl;
var fooaccessTokenUrl = fooPara.accessTokenUrl;
var fooclientId = fooPara.clientId;
var fooclientSecret = fooPara.clientSecret;
var fooscope = fooPara.scope;
auth = new OAuth2Authenticator(
fooclientId,
fooclientSecret,
fooscope,
new Uri(fooauthorizeUrl),
new Uri(fooredirectUrl),
new Uri(fooaccessTokenUrl));
auth.Completed += OnAuthenticationCompleted;
// Display the UI
PresentViewController(auth.GetUI(), true, null);
}
/// <summary>
/// 進行 OAuth2 的認證
/// </summary>
/// <returns></returns>
private async Task <string> AuthenticateUsingWebAuthenticationBroker()
{
OAuth2Authenticator auth;
OAuth2AuthenticatorParameter fooPara = new OAuth2AuthenticatorParameter();
#region 依據指定的 OAuth2 認證方式，取得該認證要用到的相關參數
if (AuthenticationHelper.OAuthType == OAuthTypeEnum.Google)
{
fooPara = AuthenticationHelper.OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Google);
}
else if (AuthenticationHelper.OAuthType == OAuthTypeEnum.Facebook)
{
fooPara = AuthenticationHelper.OAuthParas.FirstOrDefault(x => x.Type == OAuthTypeEnum.Facebook);
}
#endregion
var fooauthorizeUrl = fooPara.authorizeUrl;
var fooredirectUrl = fooPara.redirectUrl;
var fooaccessTokenUrl = fooPara.accessTokenUrl;
var fooclientId = fooPara.clientId;
var fooclientSecret = fooPara.clientSecret;
var fooscope = fooPara.scope;
#region 建立要取得 OAuth2 認證的URL
var fooOAuthLoginUrl = fooauthorizeUrl + "?client_id=" +
Uri.EscapeDataString(fooclientId);
fooOAuthLoginUrl += "&redirect_uri=" + Uri.EscapeDataString(fooredirectUrl);
fooOAuthLoginUrl += "&response_type=code";
fooOAuthLoginUrl += "&scope=" + Uri.EscapeDataString(fooscope);
#endregion
var startUri = new Uri(fooOAuthLoginUrl);
var webAuthenticationResult =
await
WebAuthenticationBroker.AuthenticateAsync(WebAuthenticationOptions.None, startUri,
new Uri(fooredirectUrl));
return(webAuthenticationResult.ResponseStatus != WebAuthenticationStatus.Success ? null : webAuthenticationResult.ResponseData.Substring(webAuthenticationResult.ResponseData.IndexOf('=') + 1));
}