2. 如果验证通过,程序会进行验证AuthorizeAttribute的Roles和User属性。
3. 如果验证通过,程序会验证配置文件中对应的Roles和Users属性。
验证配置文件的方法如下:
private bool ValidateAuthorizeConfig(Principal principal, AuthorizationContext context)
{
//action可能有重载,重载时应该标记ActionName区分
ActionNameAttribute actionNameAttr = context.ActionDescriptor
.GetCustomAttributes(typeof(ActionNameAttribute), false)
.OfType<ActionNameAttribute>().FirstOrDefault();
string actionName = actionNameAttr == null ? null : actionNameAttr.Name;
AuthorizationConfig ac = ParseAuthorizeConfig(actionName, context.RouteData);
if (ac != null)
{
if (!principal.IsInRole(ac.Roles))
{
return false;
}
if (!principal.IsInUser(ac.Users))
{
return false;
}
}
return true;
}
private AuthorizationConfig ParseAuthorizeConfig(string actionName, RouteData routeData)
{
string areaName = routeData.DataTokens["area"] as string;
string controllerName = null;
object controller, action;
if(string.IsNullOrEmpty(actionName))
{
if(routeData.Values.TryGetValue("action", out action))
{
actionName = action.ToString();
}
}
if (routeData.Values.TryGetValue("controller", out controller))
{
controllerName = controller.ToString();
}
if(!string.IsNullOrEmpty(controllerName) && !string.IsNullOrEmpty(actionName))
{
return AuthorizationConfig.ParseAuthorizationConfig(
areaName, controllerName, actionName);
}
return null;
}
}
可以看到,它会根据当前请求的area、controller和action名称,通过一个AuthorizationConfig类进行验证,该类的定义如下:
public class AuthorizationConfig
{
public string Roles { get; set; }
public string Users { get; set; }
private static XDocument _doc;
//配置文件路径
private static string _path = "~/Identity/Authorization.xml";
//首次使用加载配置文件
static AuthorizationConfig()
{
string absPath = HttpContext.Current.Server.MapPath(_path);
if (File.Exists(absPath))
{
_doc = XDocument.Load(absPath);
}
}
//解析配置文件,获得包含Roles和Users的信息
public static AuthorizationConfig ParseAuthorizationConfig(string areaName, string controllerName, string actionName)
{
EnsureHelper.EnsureNotNullOrEmpty(controllerName, "controllerName");
EnsureHelper.EnsureNotNullOrEmpty(actionName, "actionName");
if (_doc == null)
{
return null;
}
XElement rootElement = _doc.Element("root");
if (rootElement == null)
{
return null;
}
AuthorizationConfig info = new AuthorizationConfig();
XElement rolesElement = null;
XElement usersElement = null;
XElement areaElement = rootElement.Elements("area")
.Where(e => CompareName(e, areaName)).FirstOrDefault();
XElement targetElement = areaElement ?? rootElement;
XElement controllerElement = targetElement.Elements("controller")
.Where(e => CompareName(e, controllerName)).FirstOrDefault();
//如果没有area节点和controller节点则返回null
if (areaElement == null && controllerElement == null)
{
return null;
}
//此时获取标记的area
if (controllerElement == null)
{
rootElement = areaElement.Element("roles");
usersElement = areaElement.Element("users");
}
else
{
XElement actionElement = controllerElement.Elements("action")
.Where(e => CompareName(e, actionName)).FirstOrDefault();
if (actionElement != null)
{
//此时获取标记action的
rolesElement = actionElement.Element("roles");
usersElement = actionElement.Element("users");
}
else
{
//此时获取标记controller的
rolesElement = controllerElement.Element("roles");
usersElement = controllerElement.Element("users");
}
}
info.Roles = rolesElement == null ? null : rolesElement.Value;
info.Users = usersElement == null ? null : usersElement.Value;
return info;
}
private static bool CompareName(XElement e, string value)
{
XAttribute attribute = e.Attribute("name");
if (attribute == null || string.IsNullOrEmpty(attribute.Value))
{
return false;
}
return attribute.Value.Equals(value, StringComparison.OrdinalIgnoreCase);
}
}








