/// <summary>
/// Initializes the current context and sets various members to the values supplied in parameters
/// Also checks whether the app token is valid and whether the current user is authorized to access the called web method
/// </summary>
/// <param name="appToken">Application token supplied by the client</param>
/// <param name="userToken">User token supplied by the client</param>
/// <param name="userName">Current user name</param>
/// <param name="failInNoApp">Whether to throw an exception if no approved application is found to match the token</param>
///
public static void Initialize(string appToken, string userToken)
{
if (Current != null)
{
return;
}
using (ApplicationDataContext dataContext = new ApplicationDataContext())
{
Current = new BrokerContext();
Current.ActivityId = Guid.NewGuid();
Current.ApplicationToken = appToken;
Current.UserToken = userToken;
Current.UserName = Security.CurrentUser;
Application currentApplication = dataContext.Applications.SingleOrDefault(app => app.Token == appToken && app.IsApproved == true);
if (currentApplication != null)
{
Current.ApplicationId = currentApplication.ApplicationId;
Current.ApplicationName = currentApplication.Name;
}
else
{
throw new InvalidTokenException(appToken, userToken);
}
// Now find if current user is authorized to access the current method
if (System.Web.HttpContext.Current != null)
{
var ctx = System.Web.HttpContext.Current;
// Search up the stack to find the Method's message name
System.Reflection.MethodBase method = null;
for (int i = 1; true; i++)
{
StackFrame stackFrame = new StackFrame(i);
method = stackFrame.GetMethod();
if (method == null || method.IsDefined(typeof(WebMethodAttribute), false) && method.DeclaringType.IsSubclassOf(typeof(System.Web.Services.WebService)))
{
break;
}
}
if (method != null)
{
// Now get the method's message name
WebMethodAttribute webMethodAttribute = (from attr in method.GetCustomAttributes(typeof(WebMethodAttribute), false) select attr).First() as WebMethodAttribute;
Current.WebMethodMessageName = string.IsNullOrEmpty(webMethodAttribute.MessageName) ? method.Name : webMethodAttribute.MessageName;
bool isAuthorized = System.Web.Security.UrlAuthorizationModule.CheckUrlAccessForPrincipal(
string.Format("{0}/{1}", System.Web.HttpContext.Current.Request.Path, Current.WebMethodMessageName),
System.Web.HttpContext.Current.User,
"GET"
);
if (!isAuthorized)
{
Console.Write("not authoriced exception" + Current.WebMethodMessageName);
throw new System.Security.Authentication.AuthenticationException();
}
}
}
}
}