/// <summary>
/// This method supports the framework directly and should not be used from your code
/// </summary>
/// <param name="handler">The handler.</param>
/// <param name="context">The context.</param>
/// <returns><c>true</c> if the user is authenticated; otherwise, <c>false</c>.</returns>
public static bool Impl(IRequireAuthentication handler, IContext context)
{
var authenticationProvider = SimpleWeb.Configuration.AuthenticationProvider ?? new DefaultAuthenticationProvider();
var user = authenticationProvider.GetLoggedInUser(context);
if (user == null || !user.IsAuthenticated)
{
if (SimpleWeb.Configuration.LoginPage != null)
{
var uriTemplateAttribute = UriTemplateAttribute.Get(SimpleWeb.Configuration.LoginPage).FirstOrDefault();
if (uriTemplateAttribute != null)
{
var redirect = uriTemplateAttribute.Template + "?returnUrl=" + Uri.EscapeDataString(context.Request.Url.ToString());
context.Response.SetHeader("Location", redirect);
context.Response.Status = Status.TemporaryRedirect(redirect);
return(false);
}
}
context.Response.Status = "401 Unauthorized";
return(false);
}
handler.CurrentUser = user;
return(true);
}
/// <summary>
/// Gets the URI for a handler with template parameters.
/// </summary>
/// <typeparam name="THandler">The type of the handler.</typeparam>
/// <param name="expression">An expression specifying values for properties on the Handler.</param>
/// <returns>A URI with the necessary values incorporated.</returns>
public static Uri Get <THandler>(Expression <Func <THandler> > expression)
{
if (expression == null)
{
throw new ArgumentNullException("expression");
}
var memberInitExpression = expression.Body as MemberInitExpression;
if (memberInitExpression == null)
{
throw new ArgumentException("Expression must be a member initializer.");
}
var values = new Dictionary <string, object>(StringComparer.OrdinalIgnoreCase);
foreach (var memberAssignment in memberInitExpression.Bindings.OfType <MemberAssignment>())
{
object value;
if (ExpressionHelper.TryGetValue(memberAssignment.Expression, out value))
{
values.Add(memberAssignment.Member.Name, value);
}
else
{
throw new ArgumentException("Cannot resolve values from member initializer. Make sure you are not calling a function within the expression.");
}
}
var uriTemplateAttributes = UriTemplateAttribute.Get(typeof(THandler)).ToArray();
AssertAtLeastOne(uriTemplateAttributes);
foreach (var uriTemplateAttribute in uriTemplateAttributes)
{
var template = uriTemplateAttribute.Template;
var variables = new HashSet <string>(UriTemplateHelper.ExtractVariableNames(template), StringComparer.OrdinalIgnoreCase);
if (variables.All(values.ContainsKey))
{
var uri = uriTemplateAttribute.Template;
foreach (var variable in variables)
{
uri = uri.Replace("{" + variable + "}", (values[variable] ?? string.Empty).ToString());
}
return(new Uri(uri, UriKind.Relative));
}
}
throw new InvalidOperationException("Cannot find matching Uri template.");
}
/// <summary>
/// Gets the URI for a handler without template parameters.
/// </summary>
/// <param name="type">The type.</param>
/// <returns>The URI.</returns>
public static Uri Get(Type type)
{
var uriTemplateAttributes = UriTemplateAttribute.Get(type).ToArray();
AssertAtLeastOne(uriTemplateAttributes);
AssertSingle(uriTemplateAttributes);
var template = uriTemplateAttributes[0].Template;
if (template.Contains("{"))
{
throw new InvalidOperationException("UriTemplateAttribute includes variables. Use the Get<THandler>(Expression<Func<T>>) override.");
}
return(new Uri(template, UriKind.Relative));
}
internal static void Redirect(IContext context)
{
var accept = context.Request.GetAccept();
if (accept.Contains(MediaType.Html) || accept.Contains(MediaType.XHtml))
{
if (SimpleWeb.Configuration.LoginPage != null)
{
var uriTemplateAttribute =
UriTemplateAttribute.Get(SimpleWeb.Configuration.LoginPage).FirstOrDefault();
if (uriTemplateAttribute != null)
{
var redirect = uriTemplateAttribute.Template + "?returnUrl=" +
Uri.EscapeDataString(context.Request.Url.ToString());
context.Response.SetHeader("Location", redirect);
context.Response.Status = Status.TemporaryRedirect(redirect);
return;
}
}
}
context.Response.Status = "401 Unauthorized";
}
