.net core authorizationhandlercontext
public class AccessToRouteHandler : AuthorizationHandler<AccessToRouteRequirement>
{
private readonly IHttpContextAccessor httpContextAccessor;
private readonly DbContext dbContext;
public AccessToRouteHandler(IHttpContextAccessor httpContextAccessor, DbContext dbContext)
{
this.httpContextAccessor = httpContextAccessor ?? throw new ArgumentNullException(nameof(httpContextAccessor));
this.dbContext = dbContext;
}
protected override Task HandleRequirementAsync(AuthorizationHandlerContext context, AccessToRouteRequirement requirement)
{
var filterContext = context.Resource as AuthorizationFilterContext;
var routeInfo = context.Resource as RouteEndpoint;
var response = filterContext?.HttpContext.Response;
if (!context.User.Identity.IsAuthenticated || string.IsNullOrEmpty(context.User.Identity.Name))
{
response?.OnStarting(async () =>
{
filterContext.HttpContext.Response.StatusCode = (int)System.Net.HttpStatusCode.Unauthorized;
});
context.Fail();
return Task.CompletedTask;
}
var verb = this.httpContextAccessor.HttpContext.Request.Method;
var routeKey = string.Empty;
if (context.Resource is Endpoint endpoint)
{
var cad = endpoint.Metadata.OfType<ControllerActionDescriptor>().FirstOrDefault();
var controllerFullName = cad.ControllerTypeInfo.FullName;
var actionName = cad.ActionName;
var bindings = cad.Parameters;
var actionParams = ".";
if (bindings.Any())
{
bindings.ToList().ForEach(p => actionParams += p.ParameterType.Name + ".");
}
routeKey = $"{controllerFullName}.{actionName}{actionParams}{verb}";
}
var route = dbContext.Routes
.Include(t => t.Roles)
.FirstOrDefault(r => r.RouteKey == routeKey);
if (route != null && route.Roles.Any(role => context.User.HasClaim(c => c.Value == role)))
{
// user belong to a role associated to the route.
context.Succeed(requirement);
return Task.CompletedTask;
}
response?.OnStarting(async () =>
{
filterContext.HttpContext.Response.StatusCode = (int)System.Net.HttpStatusCode.Forbidden;
});
context.Fail();
return Task.CompletedTask;
}
}