/// <summary>
/// Internal method for parsing the Facebook oauth ur..
/// </summary>
/// <param name="uri">
/// The url to parse.
/// </param>
/// <param name="throws">
/// Whether to throw the exception or not incase an error occurs.
/// </param>
/// <returns>
/// The <see cref="FacebookOAuthResult"/>.
/// </returns>
/// <exception cref="InvalidOperationException">
/// Throws if cannot parse the specified url.
/// </exception>
private static FacebookOAuthResult Parse(Uri uri, bool throws)
{
IDictionary <string, object> parameters = null;
try
{
bool found = false;
if (!string.IsNullOrEmpty(uri.Fragment))
{
// #access_token and expires_in are in fragment
var fragment = uri.Fragment.Substring(1);
parameters = FacebookUtils.ParseUrlQueryString(fragment);
if (parameters.ContainsKey("access_token"))
{
found = true;
}
}
// code, state, error_reason, error and error_description are in query
// ?error_reason=user_denied&error=access_denied&error_description=The+user+denied+your+request.
var queryPart = FacebookUtils.ParseUrlQueryString(uri.Query);
if (queryPart.ContainsKey("code") || (queryPart.ContainsKey("error") && queryPart.ContainsKey("error_description")))
{
found = true;
}
if (found)
{
parameters = FacebookUtils.Merge(parameters, queryPart);
return(new FacebookOAuthResult(parameters));
}
}
catch
{
if (throws)
{
throw;
}
return(null);
}
if (throws)
{
throw new InvalidOperationException("Could not parse authentication url.");
}
return(null);
}
