[英]Optimize repeatable anonymous delegates C#
我注册授权策略。 声明options
它是站点上的一系列能力用户['cm', 'wtm', 'um']
。 借助 RequireAssertion 检查可用性所需的能力。 我如何优化这个可重复的代码? 谢谢!
policyBuilder.AddPolicy("UmPolicy", policy =>
{
policy.RequireAssertion(context =>
{
var optionsSerializedArray = context.User.FindFirstValue(ClaimType.Options);
if (optionsSerializedArray == null)
{
return false;
}
var deserializedOptionsUser = JsonSerializer.Deserialize<string[]>(optionsSerializedArray);
var option = deserializedOptionsUser?.SingleOrDefault(value => value == "um");
return option != null;
});
});
policyBuilder.AddPolicy("CmPolicy", policy =>
{
policy.RequireAssertion(context =>
{
var optionsSerializedArray = context.User.FindFirstValue(ClaimType.Options);
if (optionsSerializedArray == null)
{
return false;
}
var deserializedOptionsUser = JsonSerializer.Deserialize<string[]>(optionsSerializedArray);
var option = deserializedOptionsUser?.SingleOrDefault(value => value == "cm");
return option != null;
});
policyBuilder.AddPolicy("WtmPolicy", policy =>
{
policy.RequireAssertion(context =>
{
var optionsSerializedArray = context.User.FindFirstValue(ClaimType.Options);
if (optionsSerializedArray == null)
{
return false;
}
var deserializedOptionsUser = JsonSerializer.Deserialize<string[]>(optionsSerializedArray);
var option = deserializedOptionsUser?.SingleOrDefault(value => value == "wtm");
return option != null;
});
});
您可以使用字典来存储所有策略名称,并在字典项的循环中编写代码。
Dictionary<string, string> policies = new() { { "UmPolicy", "um" }, { "CmPolicy", "cm" }, { "WtmPolicy", "wtm" } };
foreach(var item in policies)
{
policyBuilder.AddPolicy(item.Key, policy =>
{
policy.RequireAssertion(context =>
{
var optionsSerializedArray = context.User.FindFirstValue(ClaimType.Options);
if (optionsSerializedArray == null)
{
return false;
}
var deserializedOptionsUser = JsonSerializer.Deserialize<string[]>(optionsSerializedArray);
var option = deserializedOptionsUser?.SingleOrDefault(value => value == item.Value);
return option != null;
});
});
}
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