protected void Page_Load(object sender, EventArgs e)
{
Callback = Request.QueryString["callback"];
ContentTypeAlias = Request.QueryString["contentTypeAlias"];
PropertyAlias = Request.QueryString["propertyAlias"];
if (AuthState != null)
{
string[] stateValue = Session["Skybrud.Social_" + AuthState] as string[];
if (stateValue != null && stateValue.Length == 3)
{
Callback = stateValue[0];
ContentTypeAlias = stateValue[1];
PropertyAlias = stateValue[2];
}
}
// Get the prevalue options
FacebookOAuthPreValueOptions options = FacebookOAuthPreValueOptions.Get(ContentTypeAlias, PropertyAlias);
if (!options.IsValid)
{
Content.Text = "Hold on now! The options of the underlying prevalue editor isn't valid.";
return;
}
// Configure the OAuth client based on the options of the prevalue options
FacebookOAuthClient client = new FacebookOAuthClient {
AppId = options.AppId,
AppSecret = options.AppSecret,
RedirectUri = options.RedirectUri
};
// Session expired?
if (AuthState != null && Session["Skybrud.Social_" + AuthState] == null)
{
Content.Text = "<div class=\"error\">Session expired?</div>";
return;
}
// Check whether an error response was received from Facebook
if (AuthError != null)
{
Content.Text = "<div class=\"error\">Error: " + AuthErrorDescription + "</div>";
return;
}
// Redirect the user to the Facebook login dialog
if (AuthCode == null)
{
// Generate a new unique/random state
string state = Guid.NewGuid().ToString();
// Save the state in the current user session
Session["Skybrud.Social_" + state] = new[] { Callback, ContentTypeAlias, PropertyAlias };
// Construct the authorization URL
string url = client.GetAuthorizationUrl(state, options.Scope);
// Redirect the user
Response.Redirect(url);
return;
}
// Exchange the authorization code for a user access token
string userAccessToken;
try {
userAccessToken = client.GetAccessTokenFromAuthCode(AuthCode);
} catch (Exception ex) {
Content.Text = "<div class=\"error\"><b>Unable to acquire access token</b><br />" + ex.Message + "</div>";
return;
}
try {
// Initialize the Facebook service (no calls are made here)
FacebookService service = FacebookService.CreateFromAccessToken(userAccessToken);
// Make a call to the Facebook API to get information about the user
FacebookUser me = service.Users.GetUser("me").Body;
//Get accounts information. Only works with "manage_pages" permission
FacebookAccountsResponse response = null;
if (options.Scope.Contains("manage_pages"))
{
response = service.Accounts.GetAccounts();
}
// Get debug information about the access token
FacebookDebugToken debugToken = null;
try {
debugToken = service.Debug.DebugToken(userAccessToken).Body;
} catch (Exception ex) {
Content.Text = "<div class=\"error\"><b>Unable to acquire debug token. Are you a developer?</b><br />" + ex.Message + "</div>";
}
Content.Text += "<p>Hi <strong>" + me.Name + "</strong></p>";
Content.Text += "<p>Please wait while you're being redirected...</p>";
// Set the callback data
FacebookOAuthData data = new FacebookOAuthData {
Id = me.Id,
Name = me.Name,
AccessToken = userAccessToken,
ExpiresAt = DateTime.Now.AddDays(60),
BusinessPages = new FacebookBusinessPageData[0],
SelectedBusinessPage = null
};
// Set the the business pages (if available)
if (response != null)
{
data.BusinessPages = response.Body.Data.Select(ac => new FacebookBusinessPageData {
Id = ac.Id,
Name = ac.Name,
AccessToken = ac.AccessToken
}).ToArray();
}
// Update the OAuth data with information from the debug token
if (debugToken != null)
{
data.ExpiresAt = (debugToken.Data.ExpiresAt ?? DateTime.Now.AddDays(60));//NULL when manage_pages permission is granted
data.Scope = (
from scope in debugToken.Data.Scopes select scope.Name
).ToArray();
}
// Update the UI and close the popup window
Page.ClientScript.RegisterClientScriptBlock(GetType(), "callback", String.Format(
"self.opener." + Callback + "({0}); window.close();",
data.Serialize()//Save JSON data through callback parameter
), true);
} catch (Exception ex) {
Content.Text = "<div class=\"error\"><b>Unable to get user information</b><br />" + ex.Message + "</div>";
}
}
/// <summary>
/// Gets information about accounts associated with the current user by calling the <var>/me/accounts</var> method. This call requires a user access token.
/// </summary>
public FacebookAccountsResponse GetAccounts()
{
return(FacebookAccountsResponse.ParseJson(Raw.GetAccounts()));
}
