internal virtual protected Uri GetLoginUrl(IFacebookApplication settings, HttpContextBase httpContext, IDictionary<string, object> parameters)
{
Contract.Requires(settings != null);
Contract.Requires(httpContext != null);
var authorizer = new CanvasAuthorizer(settings, httpContext)
{
ReturnUrlPath = this.ReturnUrlPath,
CancelUrlPath = this.CancelUrlPath,
LoginDisplayMode = this.LoginDisplayMode
};
if (!String.IsNullOrEmpty(this.Permissions))
{
authorizer.Permissions = this.Permissions.Replace(" ", String.Empty).Split(',');
}
return authorizer.GetLoginUrl(parameters);
}
protected internal override System.Uri GetLoginUrl(IFacebookApplication settings, HttpContextBase httpContext, IDictionary<string, object> parameters)
{
var authorizer = new CanvasAuthorizer(settings, httpContext)
{
ReturnUrlPath = ReturnUrlPath,
CancelUrlPath = CancelUrlPath,
LoginDisplayMode = LoginDisplayMode
};
if (!String.IsNullOrEmpty(Permissions))
{
authorizer.Permissions = Permissions.Replace(" ", String.Empty).Split(',');
}
if (string.IsNullOrEmpty(CancelUrlPath))
{
// set it to this same url instead of going to facebook.com
var canvasUrlBuilder = new CanvasUrlBuilder(settings, httpContext.Request);
var currentPathAndQuery = canvasUrlBuilder.CurrentCanvasPathAndQuery;
if (currentPathAndQuery.Contains("?"))
{
var parts = currentPathAndQuery.Split('?');
if (parts.Length == 2 && !string.IsNullOrEmpty(parts[1]))
{
var queryStrings = FacebookUtils.ParseUrlQueryString(parts[1]);
// remove oauth 2 error querystrings.
// error_reason=user_denied&error_denied=access_denied&error_description=The+user+denied+your+request.
if (queryStrings.ContainsKey("error_reason"))
{
queryStrings.Remove("error_reason");
}
if (queryStrings.ContainsKey("error_denied"))
{
queryStrings.Remove("error_denied");
}
if (queryStrings.ContainsKey("error_description"))
{
queryStrings.Remove("error_description");
}
currentPathAndQuery = parts[0] + "?" + FacebookUtils.ToJsonQueryString(queryStrings);
}
}
authorizer.CancelUrlPath = currentPathAndQuery;
}
return authorizer.GetLoginUrl(null);
}