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我的 Spring Security XML 中有以下内容：

<form-login login-page="/login" 
            authentication-failure-url="/login/failure" />

我想在身份验证失败时获取用户名。我在网上读到它可以从 SPRING_SECURITY_LAST_USERNAME 获得，但我的问题是：

我如何访问它：1）spring security XML，例如

authentication-failure-url="/login/failure/SPRING_SECURITY_LAST_USERNAME"

2) 或处理 /login/failure 映射的控制器。

请帮忙。我被困住了！:(

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1 回答 1

8

它已弃用：

/**
  * @deprecated If you want to retain the username, cache it in a customized {@code AuthenticationFailureHandler}
  */
@Deprecated
public static final String SPRING_SECURITY_LAST_USERNAME_KEY = "SPRING_SECURITY_LAST_USERNAME";

所以你需要实现你自己的AuthenticationFailureHandler.

我实现了 1）策略：（记住用户名可以包含一些在 URL 中不合适的字符！）

package some.package;

import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.DefaultRedirectStrategy;
import org.springframework.security.web.RedirectStrategy;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class UsernameInURLAuthenticationFailureHandler extends SimpleUrlAuthenticationFailureHandler {

    private String urlPrefix;
    private RedirectStrategy redirectStrategy = new DefaultRedirectStrategy();
    private String formUsernameKey = UsernamePasswordAuthenticationFilter.SPRING_SECURITY_FORM_USERNAME_KEY;

    public UsernameInURLAuthenticationFailureHandler(String urlPrefix) {
        this.urlPrefix = urlPrefix;
    }

    //Failure logic:
    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
        //We inherited that method:
        saveException(request, exception);

        //Prepare URL:
        String username = request.getParameter(formUsernameKey);
        String redirectUrl = urlPrefix + username;

        //Redirect:
        redirectStrategy.sendRedirect(request, response, redirectUrl);
    }

    //Getters and setters:
    public String getUrlPrefix() {
        return urlPrefix;
    }

    public void setUrlPrefix(String urlPrefix) {
        this.urlPrefix = urlPrefix;
    }

    public String getFormUsernameKey() {
        return formUsernameKey;
    }

    public void setFormUsernameKey(String formUsernameKey) {
        this.formUsernameKey = formUsernameKey;
    }

    public RedirectStrategy getRedirectStrategy() {
        return redirectStrategy;
    }

    public void setRedirectStrategy(RedirectStrategy redirectStrategy) {
        this.redirectStrategy = redirectStrategy;
    }
}

豆：

<bean class="some.package.UsernameInURLAuthenticationFailureHandler">
        <!-- prefix: -->
        <constructor-arg value="/login/failure/"/>
</bean>

您可以轻松实施 2) 策略。只需将用户名保存为onAuthenticationFailure方法内的会话属性之一，而不是将用户名添加到 URL。

您可以轻松设置自己的处理程序：

<form-login>属性

authentication-failure-handler-ref

可用作 authentication-failure-url 的替代方案，让您在身份验证失败后完全控制导航流程。该值应该是应用程序上下文中 AuthenticationFailureHandler bean 的名称。

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于 2012-11-25T10:20:22.397 回答