為什么@AuthenticationPrincipal返回Authentication而不是主體對象？

Question

我想在我的控制器方法中使用@AuthenticationPrincipal批注檢索當前用戶。 該文檔指出以下內容：

將方法參數或方法返回值綁定到Authentication.getPrincipal（）的注釋。

但是實際上我得到了Authentication對象而不是Authentication.getPrincipal() 。

這是我的簡單控制器方法：

@RequestMapping("/")
public @ResponseBody String index(@AuthenticationPrincipal final WindowsAuthenticationToken user) {
    return String.format("Welcome to the home page, %s!", user.getName());
}

WindowsAuthenticationToken實現Authentication 。 在此實現中， getPrincipal返回WindowsPrincipal 。

上面的控制器方法有效，但是當我將參數類型更改為WindowsPrincipal並嘗試訪問網站時，出現以下錯誤頁面：

Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback.

Tue Mar 03 15:13:52 CET 2015
There was an unexpected error (type=Internal Server Error, status=500).
argument type mismatch HandlerMethod details: Controller [pkg.HomeController] Method [public java.lang.String pkg.HomeController.index(waffle.servlet.WindowsPrincipal)] Resolved arguments: [0] [type=waffle.spring.WindowsAuthenticationToken] [value=waffle.spring.WindowsAuthenticationToken@121a2581]

這是我的配置文件：

package pkg;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.annotation.web.servlet.configuration.EnableWebMvcSecurity;
import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;

import waffle.servlet.spi.BasicSecurityFilterProvider;
import waffle.servlet.spi.NegotiateSecurityFilterProvider;
import waffle.servlet.spi.SecurityFilterProvider;
import waffle.servlet.spi.SecurityFilterProviderCollection;
import waffle.spring.NegotiateSecurityFilter;
import waffle.spring.NegotiateSecurityFilterEntryPoint;
import waffle.windows.auth.impl.WindowsAuthProviderImpl;

@Configuration
@EnableWebMvcSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private NegotiateSecurityFilterEntryPoint negotiateSecurityFilterEntryPoint;

    @Autowired
    private NegotiateSecurityFilter waffleNegotiateSecurityFilter;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.exceptionHandling().authenticationEntryPoint(negotiateSecurityFilterEntryPoint).and()
                .addFilterBefore(waffleNegotiateSecurityFilter, BasicAuthenticationFilter.class).authorizeRequests()
                .anyRequest().fullyAuthenticated();
    }

    @Bean
    public WindowsAuthProviderImpl waffleAuthProvider() {
        return new WindowsAuthProviderImpl();
    }

    @Bean
    public NegotiateSecurityFilterProvider negotiateSecurityFilterProvider(
            final WindowsAuthProviderImpl waffleAuthProvider) {
        return new NegotiateSecurityFilterProvider(waffleAuthProvider);
    }

    @Bean
    public BasicSecurityFilterProvider basicSecurityFilterProvider(final WindowsAuthProviderImpl waffleAuthProvider) {
        return new BasicSecurityFilterProvider(waffleAuthProvider);
    }

    @Bean
    public SecurityFilterProviderCollection waffleSecurityFilterProviderCollection(
            final NegotiateSecurityFilterProvider negotiateSecurityFilterProvider,
            final BasicSecurityFilterProvider basicSecurityFilterProvider) {
        final SecurityFilterProvider[] providers = { negotiateSecurityFilterProvider, basicSecurityFilterProvider };

        return new SecurityFilterProviderCollection(providers);
    }

    @Bean
    public NegotiateSecurityFilterEntryPoint negotiateSecurityFilterEntryPoint(
            final SecurityFilterProviderCollection waffleSecurityFilterProviderCollection) {
        final NegotiateSecurityFilterEntryPoint entryPoint = new NegotiateSecurityFilterEntryPoint();

        entryPoint.setProvider(waffleSecurityFilterProviderCollection);

        return entryPoint;
    }

    @Bean
    public NegotiateSecurityFilter waffleNegotiateSecurityFilter(
            final SecurityFilterProviderCollection waffleSecurityFilterProviderCollection) {
        final NegotiateSecurityFilter filter = new NegotiateSecurityFilter();

        filter.setProvider(waffleSecurityFilterProviderCollection);

        return filter;
    }

}

為什么行為與應有的行為有所不同？

Answer 1

我的主要對象沒有實現UserDetails 。 因為WindowsPrincipal是外部庫的類，所以我無法對其進行任何更改。 最后，我創建了一個新的篩選器，該篩選器將WindowsPrincipal包裝在實現UserDetails的類中。 現在，我使用@AuthenticationPrincipal獲得正確的主體對象。

Answer 2

這是因為WindowsPrincipal實現Principal 。 刪除Implements子句，它將再次起作用。 我有同樣的問題，這解決了它。