using System.Reflection;

using System.Web;

using System.Web.SessionState;

using SAML2.Logging;

using SAML2.State;

namespace SAML2.Protocol

{

/// <summary>

/// A base class for all endpoint handlers.

/// </summary>

public abstract class AbstractEndpointHandler : IHttpHandler, IRequiresSessionState

{

/// <summary>

/// Logger instance.

/// </summary>

protected static readonly IInternalLogger Logger = LoggerProvider.LoggerFor(MethodBase.GetCurrentMethod().DeclaringType);

/// <summary>

/// State Service instance

/// </summary>

protected static readonly IInternalStateService StateService = StateServiceProvider.StateServiceFor(MethodBase.GetCurrentMethod().DeclaringType);

/// <summary>

/// Gets or sets the redirect URL.

/// </summary>

/// <value>The redirect URL.</value>

public string RedirectUrl { get; set; }

#region IHttpHandler Members

/// <summary>

/// Gets a value indicating whether another request can use the <see cref="T:System.Web.IHttpHandler"/> instance.

/// </summary>

/// <value></value>

/// <returns>true if the <see cref="T:System.Web.IHttpHandler"/> instance is reusable; otherwise, false.</returns>

public bool IsReusable

{

get { return true; }

}

/// <summary>

/// Enables processing of HTTP Web requests by a custom HttpHandler that implements the <see cref="T:System.Web.IHttpHandler"/> interface.

/// </summary>

/// <param name="context">An <see cref="T:System.Web.HttpContext"/> object that provides references to the intrinsic server objects (for example, Request, Response, Session, and Server) used to service HTTP requests.</param>

public abstract void ProcessRequest(HttpContext context);

#endregion

/// <summary>

/// Redirects the user.

/// </summary>

/// <param name="context">The context.</param>

public void DoRedirect(HttpContext context)

{

var redirectUrl = StateService.Get<string>("RedirectUrl");

if (!string.IsNullOrEmpty(redirectUrl))

{

StateService.Remove("RedirectUrl");

context.Response.Redirect(redirectUrl);

}

else if (string.IsNullOrEmpty(RedirectUrl))

{

context.Response.Redirect("~/");

}

else

{

context.Response.Redirect(RedirectUrl);

}

}

}

}