/// <summary>
/// Gets an instance of ZentityService which can handle the specified Http request.
/// </summary>
/// <param name="context">An instance of HttpContext containing request details.</param>
/// <returns>An instance of ZentityService responsible for handling the specified request.</returns>
/// <remarks>Returns null, if the ServiceFactory could not find any service
/// which can handle the give request.</remarks>
public static IZentityService GetServiceInstance(HttpContext context)
{
IZentityService service = null;
string serviceType = GetServiceType(context.Request.Url);
switch (serviceType)
{
case AtomPub:
service = new AtomPubService();
break;
case Sword:
service = new SwordService();
break;
case Pmh:
service = new OaiPmhService();
break;
case Ore:
service = new OreService();
break;
case Syndication:
service = new SyndicationService();
break;
default:
service = null;
break;
}
return(service);
}
/// <summary>
/// Handles the Http requests.
/// </summary>
/// <param name="context">An instance of HttpContext containing request details.</param>
public void ProcessRequest(HttpContext context)
{
try
{
IZentityService service = ServiceFactory.GetServiceInstance(context);
if (null == service)
{
context.Response.StatusCode = (int)HttpStatusCode.BadRequest;
context.Response.Write(Properties.Resources.COULD_NOT_HANDLE_REQUEST);
return;
}
string error;
if (service.ValidateRequest(context, out error))
{
HttpStatusCode statusCode;
string responseString = service.ProcessRequest(context,
out statusCode);
context.Response.StatusCode = (int)statusCode;
context.Response.BufferOutput = true;
context.Response.Write(responseString);
}
else
{
context.Response.StatusCode = (int)HttpStatusCode.BadRequest;
context.Response.Write(error);
}
if (context.Items.Contains("AuthenticatedToken"))
{
context.Items.Remove("AuthenticatedToken");
}
}
//We don't want to throw any error to user. instead we throw 500 (Internal server error)
catch (Exception)
{
context.Response.StatusCode = (int)HttpStatusCode.InternalServerError;
context.Response.Write(Properties.Resources.INTERNAL_SERVER_ERROR);
}
}
