/// <summary>
/// Initializes a module and prepares it to handle requests.
/// </summary>
/// <param name="context">
/// An <see cref="HttpApplication" /> that provides access to the methods,
/// properties, and events common to all application objects within an ASP.NET application
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="context"/> is <see langword="null"/>.
/// </exception>
/// <exception cref="InvalidOperationException">
/// <paramref name="context"/> does not implement <see cref="IJwtValidationParametersProvider"/>.
/// </exception>
public void Init(HttpApplication context)
{
context.AssertNotNull("context");
var app = context as IJwtValidationParametersProvider;
if (app == null)
{
throw new InvalidOperationException(InvariantStrings.InvalidHttpApplication);
}
this.tokenValidationParameters = app.TokenValidationParameters;
context.AuthenticateRequest += this.Application_AuthenticateRequest;
}