async public void LoginWithBehavior(string permissions, FacebookLoginBehavior behavior)
{
switch (behavior)
{
case FacebookLoginBehavior.LoginBehaviorMobileInternetExplorerOnly:
{
#if (WP8 || WINDOWS_PHONE)
String appId = await AppAuthenticationHelper.GetFacebookConfigValue("Facebook", "AppId");
Uri uri =
new Uri(
String.Format(
"https://m.facebook.com/v2.1/dialog/oauth?redirect_uri={0}%3A%2F%2Fauthorize&display=touch&state=%7B%220is_active_session%22%3A1%2C%22is_open_session%22%3A1%2C%22com.facebook.sdk_client_state%22%3A1%2C%223_method%22%3A%22browser_auth%22%7D&scope={2}&type=user_agent&client_id={1}&sdk=ios",
String.Format("fb{0}", appId), appId, permissions), UriKind.Absolute);
Launcher.LaunchUriAsync(uri);
break;
#else
throw new NotImplementedException("Internet explorer based login is not available on Windows");
#endif
}
case FacebookLoginBehavior.LoginBehaviorWebViewOnly:
{
String appId = await AppAuthenticationHelper.GetFacebookConfigValue("Facebook", "AppId");
#if WP8 || WINDOWS_PHONE
Uri uri =
new Uri(
String.Format(
"https://m.facebook.com/v2.1/dialog/oauth?redirect_uri={0}%3A%2F%2Fauthorize&display=touch&state=%7B%220is_active_session%22%3A1%2C%22is_open_session%22%3A1%2C%22com.facebook.sdk_client_state%22%3A1%2C%223_method%22%3A%22browser_auth%22%7D&scope={2}&type=user_agent&client_id={1}&sdk=ios",
String.Format("fb{0}", appId), appId, permissions), UriKind.Absolute);
#else
Uri uri = await GetLoginUrl(permissions);
#endif
WebviewAuthentication.AuthenticateAsync(WebAuthenticationOptions.None, uri, null);
break;
}
case FacebookLoginBehavior.LoginBehaviorWebAuthenticationBroker:
#if WINDOWS
{
try
{
// TODO: What to do here? LoginAsync returns inproc. Login with IE returns out of proc?
var result = await LoginAsync(permissions, FacebookLoginBehavior.LoginBehaviorWebAuthenticationBroker);
// when the results are available, launch the event handler
if (OnFacebookAuthenticationFinished != null)
{
OnFacebookAuthenticationFinished(result);
}
if (OnSessionStateChanged != null)
{
OnSessionStateChanged(LoginStatus.LoggedIn);
}
}
catch (FacebookOAuthException e)
{
if (OnSessionStateChanged != null)
{
OnSessionStateChanged(LoginStatus.LoggedOut);
}
}
break;
}
#else
{
throw new NotImplementedException("WebviewAuthentication is not implemented on Windows Phone");
}
#endif// WINDOWS
case FacebookLoginBehavior.LoginBehaviorApplicationOnly:
{
#if WP8 || WINDOWS_PHONE
LoginWithApp(permissions);
break;
#else
throw new NotImplementedException("Login via app is not available on Windows");
#endif
}
}
}
private async Task <FacebookOAuthResult> PromptOAuthDialog(string permissions, WebAuthenticationOptions options, FacebookLoginBehavior loginBehavior)
{
#if !WINDOWS
if (loginBehavior != FacebookLoginBehavior.LoginBehaviorWebViewOnly)
{
throw new NotImplementedException("Following login behavior is not supported on Windows Phone: " + loginBehavior.ToString());
}
#endif
// Use WebviewAuthentication to launch server side OAuth flow
Uri startUri = await this.GetLoginUrl(permissions);
Uri endUri = new Uri("https://www.facebook.com/connect/login_success.html");
WebAuthenticationResult result = null;
#if WINDOWS
if (loginBehavior == FacebookLoginBehavior.LoginBehaviorWebAuthenticationBroker)
{
result = await WebAuthenticationBroker.AuthenticateAsync(options, startUri, endUri);
if (result.ResponseStatus == WebAuthenticationStatus.ErrorHttp)
{
throw new HttpRequestException("An Http error happened. Error Code: " +
result.ResponseStatus.ToString());
}
else if (result.ResponseStatus == WebAuthenticationStatus.UserCancel)
{
throw new FacebookOAuthException("Facebook.Client: User cancelled login in WebAuthBroker");
}
}
#endif
var client = new FacebookClient();
var authResult = client.ParseOAuthCallbackUrl(new Uri(result.ResponseData));
return(authResult);
}
internal async Task <AccessTokenData> LoginAsync(string permissions, FacebookLoginBehavior loginBehavior)
{
return(await LoginAsync(permissions, false, loginBehavior));
}
internal async Task <AccessTokenData> LoginAsync(string permissions, bool force, FacebookLoginBehavior loginBehavior)
{
if (this.LoginInProgress)
{
throw new InvalidOperationException("Login in progress.");
}
this.LoginInProgress = true;
try
{
var session = AccessTokenDataCacheProvider.Current.GetSessionData();
if (session == null)
{
#if WINDOWS
// Authenticate
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None, loginBehavior);
#else
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None, loginBehavior);
#endif
FacebookClient client = new FacebookClient(authResult.AccessToken);
var parameters = new Dictionary <string, object>();
parameters["fields"] = "id";
var result = await client.GetTaskAsync("me", parameters);
var dict = (IDictionary <string, object>)result;
session = new AccessTokenData
{
AccessToken = authResult.AccessToken,
Expires = authResult.Expires,
FacebookId = (string)dict["id"],
};
}
else
{
// Check if we are requesting new permissions
bool newPermissions = false;
if (!string.IsNullOrEmpty(permissions))
{
var p = permissions.Split(',');
newPermissions = session.CurrentPermissions.Join(p, s1 => s1, s2 => s2, (s1, s2) => s1).Count() != p.Length;
}
// Prompt OAuth dialog if force renew is true or
// if new permissions are requested or
// if the access token is expired.
if (force || newPermissions || session.Expires <= DateTime.UtcNow)
{
#if WINDOWS
// Authenticate
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None, loginBehavior);
#else
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None, loginBehavior);
#endif
if (authResult != null)
{
session.AccessToken = authResult.AccessToken;
session.Expires = authResult.Expires;
}
}
}
// Set the current known permissions
if (!string.IsNullOrEmpty(permissions))
{
var p = permissions.Split(',');
session.CurrentPermissions = session.CurrentPermissions.Union(p).ToList();
}
// Save session data
AccessTokenDataCacheProvider.Current.SaveSessionData(session);
CurrentAccessTokenData = session;
}
finally
{
this.LoginInProgress = false;
}
return(CurrentAccessTokenData);
}
new PropertyMetadata(FacebookLoginBehavior.LoginBehaviorMobileInternetExplorerOnly));
internal async Task <AccessTokenData> LoginAsync(FacebookLoginBehavior loginBehavior)
{
return(await LoginAsync(null, false, loginBehavior));
}
private async Task<FacebookOAuthResult> PromptOAuthDialog(string permissions, WebAuthenticationOptions options, FacebookLoginBehavior loginBehavior)
{
#if !WINDOWS
if (loginBehavior != FacebookLoginBehavior.LoginBehaviorWebViewOnly)
{
throw new NotImplementedException("Following login behavior is not supported on Windows Phone: " + loginBehavior.ToString());
}
#endif
// Use WebviewAuthentication to launch server side OAuth flow
Uri startUri = await this.GetLoginUrl(permissions);
Uri endUri = new Uri("https://www.facebook.com/connect/login_success.html");
WebAuthenticationResult result = null;
#if WINDOWS
if (loginBehavior == FacebookLoginBehavior.LoginBehaviorWebAuthenticationBroker)
{
result = await WebAuthenticationBroker.AuthenticateAsync(options, startUri, endUri);
if (result.ResponseStatus == WebAuthenticationStatus.ErrorHttp)
{
throw new HttpRequestException("An Http error happened. Error Code: " +
result.ResponseStatus.ToString());
}
else if (result.ResponseStatus == WebAuthenticationStatus.UserCancel)
{
throw new FacebookOAuthException("Facebook.Client: User cancelled login in WebAuthBroker");
}
}
#endif
var client = new FacebookClient();
var authResult = client.ParseOAuthCallbackUrl(new Uri(result.ResponseData));
return authResult;
}
async public void LoginWithBehavior(string permissions, FacebookLoginBehavior behavior)
{
switch (behavior)
{
case FacebookLoginBehavior.LoginBehaviorMobileInternetExplorerOnly:
{
#if (WP8 || WINDOWS_PHONE)
String appId = Session.AppId;
Uri uri =
new Uri(
String.Format(
"https://m.facebook.com/v2.1/dialog/oauth?redirect_uri={0}&display=touch&state=%7B%220is_active_session%22%3A1%2C%22is_open_session%22%3A1%2C%22com.facebook.sdk_client_state%22%3A1%2C%223_method%22%3A%22browser_auth%22%7D&scope={2}&type=user_agent&client_id={1}&sdk=ios",
LoginRedirectUri, appId, permissions), UriKind.Absolute);
Launcher.LaunchUriAsync(uri);
break;
#else
throw new NotImplementedException("Internet explorer based login is not available on Windows");
#endif
}
case FacebookLoginBehavior.LoginBehaviorWebViewOnly:
{
String appId = Session.AppId;
#if WP8 || WINDOWS_PHONE
Uri uri =
new Uri(
String.Format(
"https://m.facebook.com/v2.1/dialog/oauth?redirect_uri={0}%3A%2F%2Fauthorize&display=touch&state=%7B%220is_active_session%22%3A1%2C%22is_open_session%22%3A1%2C%22com.facebook.sdk_client_state%22%3A1%2C%223_method%22%3A%22browser_auth%22%7D&scope={2}&type=user_agent&client_id={1}&sdk=ios",
String.Format("fb{0}", appId), appId, permissions), UriKind.Absolute);
#else
Uri uri = await GetLoginUrl(permissions);
#endif
WebviewAuthentication.AuthenticateAsync(WebAuthenticationOptions.None, uri, null);
break;
}
case FacebookLoginBehavior.LoginBehaviorWebAuthenticationBroker:
#if WINDOWS
{
try
{
// TODO: What to do here? LoginAsync returns inproc. Login with IE returns out of proc?
var result = await LoginAsync(permissions, FacebookLoginBehavior.LoginBehaviorWebAuthenticationBroker);
// when the results are available, launch the event handler
if (OnFacebookAuthenticationFinished != null)
{
OnFacebookAuthenticationFinished(result);
}
if (OnSessionStateChanged != null)
{
OnSessionStateChanged(LoginStatus.LoggedIn);
}
}
catch (FacebookOAuthException e)
{
if (OnSessionStateChanged != null)
{
OnSessionStateChanged(LoginStatus.LoggedOut);
}
}
break;
}
#else
{
throw new NotImplementedException("WebviewAuthentication is not implemented on Windows Phone");
}
#endif// WINDOWS
case FacebookLoginBehavior.LoginBehaviorApplicationOnly:
{
#if WP8 || WINDOWS_PHONE
LoginWithApp(permissions);
break;
#else
throw new NotImplementedException("Login via app is not available on Windows");
#endif
}
}
}
internal async Task<AccessTokenData> LoginAsync(string permissions, bool force, FacebookLoginBehavior loginBehavior)
{
if (this.LoginInProgress)
{
throw new InvalidOperationException("Login in progress.");
}
this.LoginInProgress = true;
try
{
var session = AccessTokenDataCacheProvider.Current.GetSessionData();
if (session == null)
{
#if WINDOWS
// Authenticate
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None, loginBehavior);
#else
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None, loginBehavior);
#endif
FacebookClient client = new FacebookClient(authResult.AccessToken);
var parameters = new Dictionary<string, object>();
parameters["fields"] = "id";
var result = await client.GetTaskAsync("me", parameters);
var dict = (IDictionary<string, object>)result;
session = new AccessTokenData
{
AccessToken = authResult.AccessToken,
Expires = authResult.Expires,
FacebookId = (string)dict["id"],
};
}
else
{
// Check if we are requesting new permissions
bool newPermissions = false;
if (!string.IsNullOrEmpty(permissions))
{
var p = permissions.Split(',');
newPermissions = session.CurrentPermissions.Join(p, s1 => s1, s2 => s2, (s1, s2) => s1).Count() != p.Length;
}
// Prompt OAuth dialog if force renew is true or
// if new permissions are requested or
// if the access token is expired.
if (force || newPermissions || session.Expires <= DateTime.UtcNow)
{
#if WINDOWS
// Authenticate
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None, loginBehavior);
#else
var authResult = await PromptOAuthDialog(permissions, WebAuthenticationOptions.None, loginBehavior);
#endif
if (authResult != null)
{
session.AccessToken = authResult.AccessToken;
session.Expires = authResult.Expires;
}
}
}
// Set the current known permissions
if (!string.IsNullOrEmpty(permissions))
{
var p = permissions.Split(',');
session.CurrentPermissions = session.CurrentPermissions.Union(p).ToList();
}
// Save session data
AccessTokenDataCacheProvider.Current.SaveSessionData(session);
CurrentAccessTokenData = session;
}
finally
{
this.LoginInProgress = false;
}
return CurrentAccessTokenData;
}
internal async Task<AccessTokenData> LoginAsync(string permissions, FacebookLoginBehavior loginBehavior)
{
return await LoginAsync(permissions, false, loginBehavior);
}
internal async Task<AccessTokenData> LoginAsync(FacebookLoginBehavior loginBehavior)
{
return await LoginAsync(null, false, loginBehavior);
}
