跨站脚本攻击(XSS)过滤器,以白名单的过滤策略,支持多种过滤策略,可以根据业务场景选择适合的过滤策略,或者根据用户角色动态绑定过滤策略,支持OwaspAntisamy项目的配置,支持json格式的配置; 使用方法:
public void ConfigureServices(IServiceCollection services)
{
//添加策略和设置默认策略
services.AddXssFilter(opt=>opt.DefaultSchemeName= "DefaultPolicy")
.AddScheme<AntisamyPolicy>("antisamy", () => File.ReadAllTextAsync(Path.Combine(HostEnvironment.ContentRootPath, "resources/antisamy.xml")))
.AddScheme<AntisamyPolicy>("anythinggoes", () => File.ReadAllTextAsync(Path.Combine(HostEnvironment.ContentRootPath, "resources/antisamy-anythinggoes.xml")))
.AddScheme<AntisamyPolicy>("ebay", () => File.ReadAllTextAsync(Path.Combine(HostEnvironment.ContentRootPath, "resources/antisamy-ebay.xml")))
.AddScheme<AntisamyPolicy>("myspace", () => File.ReadAllTextAsync(Path.Combine(HostEnvironment.ContentRootPath, "resources/antisamy-myspace.xml")))
.AddScheme<AntisamyPolicy>("slashdot", () => File.ReadAllTextAsync(Path.Combine(HostEnvironment.ContentRootPath, "resources/antisamy-slashdot.xml")))
.AddScheme<AntisamyPolicy>("test", () => File.ReadAllTextAsync(Path.Combine(HostEnvironment.ContentRootPath, "resources/antisamy-test.xml")))
.AddScheme<JsonFilterPolicy>("DefaultPolicy", () => File.ReadAllTextAsync(Path.Combine(HostEnvironment.ContentRootPath, "resources/DefaultPolicy.json")));
;
//添加模型绑定器
services.AddControllers(options =>
{
options.ModelBinderProviders.Insert(0, new RichTextBinderProvider());
});
services.AddControllersWithViews();
}
//依赖注入
public HomeController(IFilterPolicyFactory policyFactory)
{
this.policyFactory = policyFactory;
}
public async Task<IActionResult> Test(string source) {
var policyName="ebay"//策略名称
var filter=await policyFactory.CreateHtmlFilter(policyName);//创建过滤器
var clean = filter.Filters(source);//过滤危险代码
return Content(clean);
}
//模型绑定过滤策略
public class TestModel
{
public string Name { get; set; }
[XssSchemeName("ebay")]
public RichText RichText { get; set; }
}
public IActionResult Test(TestModel model)
{
string clean = model?.RichText;//这里自动过滤危险代码
return Content(clean??string.Empty);
}
//使用参数绑定过滤策略
public IActionResult Test([XssSchemeName("ebay")] RichText richText)
{
string clean = richText;//这里自动过滤危险代码
return Content(clean??string.Empty);
}
- 使用内置的默认策略
//使用参数绑定过滤策略,这里需要添加模型绑定器
public IActionResult Test(RichText richText)
{
string clean = richText;//这里自动过滤危险代码
return Content(clean??string.Empty);
}
//这里不需要添加模型绑定器
public IActionResult Test(string source)
{
RichText richText=source;
string clean = richText;//这里自动过滤危险代码
return Content(clean??string.Empty);
}
- 指定策略
public IActionResult Test(string source)
{
var policy = new AntisamyPolicy();//json格式用JsonFilterPolicy类
policy.Init(File.ReadAllText("c:/www/resources/antisamy-ebay.xml"),"ebay");
var filter=new HtmlFilter(policy);
var clean = filter.Filters(source);//过滤危险代码
return Content(clean??string.Empty);
}