在 Blazor WASM 中,如果没有恰当地设置授权检查,攻击者可能会越过此检查并访问应用程序的受限资源。以下是一种可能的解决方案:
public class AuthService
{
private readonly HttpClient _httpClient;
public AuthService(HttpClient httpClient)
{
_httpClient = httpClient;
}
public async Task IsAuthorized()
{
var response = await _httpClient.GetAsync("api/Authorize");
if(response.IsSuccessStatusCode)
{
return true;
}
return false;
}
}
builder.Services.AddScoped();
@inject AuthService AuthService
@if(await AuthService.IsAuthorized())
{
}
else
{
你没有访问此资源的权限。
}
var builder = WebAssemblyHostBuilder.CreateDefault(args);
builder.RootComponents.Add("app");
// ...
builder.Services.AddAuthorizationCore();
builder.Services.AddHttpClient("MyApp.ServerAPI", client => client.BaseAddress = new Uri(builder.HostEnvironment.BaseAddress))
.AddHttpMessageHandler();
builder.Services.AddScoped(sp => sp.GetRequiredService().CreateClient("MyApp.ServerAPI"));
builder.Services.AddScoped();
builder.Services.AddScoped();
builder.Services.AddScoped(sp =>
sp.GetRequiredService()
.CreateClient("MyApp.ServerAPI"))
.AddHttpMessageHandler();
// 将身份验证添加到 HTTP 管道中
builder.Services.AddScoped();
builder.Services.AddAuthorization(options =>
{
options.AddPolicy("RequireAuthenticatedUser", a =>
a.RequireAuthenticatedUser());
});
// ...
await builder.Build().RunAsync();
这种解决方案