/// <summary>
/// Gets an authorization URL using the specified <paramref name="state"/> and request the specified
/// <paramref name="scope"/>.
/// </summary>
/// <param name="state">A unique state for the request.</param>
/// <param name="scope">The scope of your application.</param>
/// <returns>The authorization URL.</returns>
public virtual string GetAuthorizationUrl(string state, params string[] scope)
{
// Some validation
if (String.IsNullOrWhiteSpace(ClientId))
{
throw new PropertyNotSetException("ClientId");
}
if (String.IsNullOrWhiteSpace(RedirectUri))
{
throw new PropertyNotSetException("RedirectUri");
}
// Do we have a valid "state" ?
if (String.IsNullOrWhiteSpace(state))
{
throw new ArgumentNullException("state", "A valid state should be specified as it is part of the security of OAuth 2.0.");
}
// Construct the query string
IHttpQueryString query = new SocialHttpQueryString();
query.Add("client_id", ClientId);
query.Add("redirect_uri", RedirectUri);
query.Add("response_type", "code");
query.Add("state", state);
// Append the scope (if specified)
if (scope != null && scope.Length > 0)
{
query.Add("scope", String.Join(" ", scope));
}
// Construct the authorization URL
return("https://api.instagram.com/oauth/authorize/?" + query.ToString());
}