Spring Security之默認的過濾器鏈及自定義Filter操作

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Spring Security 過濾器鏈及自定義Filter

別名 類名稱 Namespace Element or Attribute
CHANNEL_FILTER ChannelProcessingFilter http/intercept-url@requires-channel
SECURITY_CONTEXT_FILTER SecurityContextPersistenceFilter http
CONCURRENT_SESSION_FILTER ConcurrentSessionFilter session-management/concurrency-control
HEADERS_FILTER HeaderWriterFilter http/headers
CSRF_FILTER CsrfFilter http/csrf
LOGOUT_FILTER LogoutFilter http/logout
X509_FILTER X509AuthenticationFilter http/x509
PRE_AUTH_FILTER AbstractPreAuthenticatedProcessingFilter( Subclasses) N/A
CAS_FILTER CasAuthenticationFilter N/A
FORM_LOGIN_FILTER UsernamePasswordAuthenticationFilter http/form-login
BASIC_AUTH_FILTER BasicAuthenticationFilter http/http-basic
SERVLET_API_SUPPORT_FILTER SecurityContextHolderAwareRequestFilter http/@servlet-api-provision
JAAS_API_SUPPORT_FILTER JaasApiIntegrationFilter http/@jaas-api-provision
REMEMBER_ME_FILTER RememberMeAuthenticationFilter http/remember-me
ANONYMOUS_FILTER AnonymousAuthenticationFilter http/anonymous
SESSION_MANAGEMENT_FILTER SessionManagementFilter session-management
EXCEPTION_TRANSLATION_FILTER ExceptionTranslationFilter http
FILTER_SECURITY_INTERCEPTOR FilterSecurityInterceptor http
SWITCH_USER_FILTER SwitchUserFilter N/A

過濾器順序從上到下

自定義 Filter

自定義的 Filter 建議繼承 GenericFilterBean，本文示例：

package com.example.filter;
import org.springframework.web.filter.GenericFilterBean;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import java.io.IOException;
/**
 * @author 咸魚
 * @date 2019-05-26 18:02
 */
public class BeforeLoginFilter extends GenericFilterBean {
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        System.out.println("在 UsernamePasswordAuthenticationFilter 前調用");
        chain.doFilter(request, response);
    }
}

配置自定義 Filter 在 Spring Security 過濾器鏈中的位置

配置很簡單，本文示例：

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .authorizeRequests()
                .antMatchers("/").permitAll()
                .antMatchers("/user/**").hasAuthority("USER")
                .and()
                .formLogin().loginPage("/login").defaultSuccessUrl("/user")
                .and()
                .logout().logoutUrl("/logout").logoutSuccessUrl("/login");
        // 在 UsernamePasswordAuthenticationFilter 前添加 BeforeLoginFilter
        http.addFilterBefore(new BeforeLoginFilter(), UsernamePasswordAuthenticationFilter.class);
        // 在 CsrfFilter 後添加 AfterCsrfFilter
        http.addFilterAfter(new AfterCsrfFilter(), CsrfFilter.class);
    }

說明：

HttpSecurity 有三個常用方法來配置：

addFilterBefore(Filter filter, Class<? extends Filter> beforeFilter)

在 beforeFilter 之前添加 filter

addFilterAfter(Filter filter, Class<? extends Filter> afterFilter)

在 afterFilter 之後添加 filter

addFilterAt(Filter filter, Class<? extends Filter> atFilter)

在 atFilter 相同位置添加 filter， 此 filter 不覆蓋 filter

通過在不同 Filter 的 doFilter() 方法中加斷點調試，可以判斷哪個 filter 先執行，從而判斷 filter 的執行順序 。

spring security添加自定義過濾器

1、定義自己的過濾器

2、指定位置，通過HttpSecurity的方法指定

定義過濾器

package com.qiudaozhang.springsecurity.filter;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class RequestHeadCheckFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        var httpRequest = (HttpServletRequest) servletRequest;
        var httpResponse = (HttpServletResponse) servletResponse;
        String requestId = httpRequest.getHeader("Request-id");
        if(requestId == null || requestId.isBlank()) {
            httpResponse.setStatus(HttpServletResponse.SC_BAD_REQUEST);
            return;
        }
        filterChain.doFilter(servletRequest,servletResponse);
    }
}
package com.qiudaozhang.springsecurity.filter;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class RequestParamCheckFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        var httpRequest = (HttpServletRequest) servletRequest;
        var httpResponse = (HttpServletResponse) servletResponse;
        String timestamp = httpRequest.getParameter("timestamp");
        if(timestamp == null || timestamp.isBlank()) {
            httpResponse.setStatus(HttpServletResponse.SC_FORBIDDEN);
            return;
        }
        filterChain.doFilter(servletRequest,servletResponse);
    }
}

指定位置

HttpSecurity中有兩個方法，指定過濾器的位置，一個指定在誰前面，一個指定在誰後面。

   public HttpSecurity addFilterAfter(Filter filter, Class<? extends Filter> afterFilter) {
       this.comparator.registerAfter(filter.getClass(), afterFilter);
       return this.addFilter(filter);
   }
   public HttpSecurity addFilterBefore(Filter filter, Class<? extends Filter> beforeFilter) {
       this.comparator.registerBefore(filter.getClass(), beforeFilter);
       return this.addFilter(filter);
   }

package com.qiudaozhang.springsecurity.config;
import com.qiudaozhang.springsecurity.filter.RequestHeadCheckFilter;
import com.qiudaozhang.springsecurity.filter.RequestParamCheckFilter;
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.web.authentication.www.BasicAuthenticationFilter;
@Configuration
public class ProjectConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.addFilterBefore(
                new RequestHeadCheckFilter(),
                BasicAuthenticationFilter.class
        )
                .addFilterAfter(new RequestParamCheckFilter(),BasicAuthenticationFilter.class)
                .authorizeRequests()
                .anyRequest()
                .permitAll();
    }
}

測試

準備一個端點測試

package com.qiudaozhang.springsecurity.controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class HelloController {
    @GetMapping("hello")
    public String hello () {
        return "hello";
    }
}

在這裡插入圖片描述

當前沒有傳遞timestamp參數，所以參照約定，過濾器直接給出403.

在這裡插入圖片描述

當前頭部信息和參數信息都提供瞭，檢測通過。

實際應用場景 檢測相關的頭部，參數等等信息日志過濾器，將所有請求的相關數據記錄下來特殊的權限校驗等等。

以上為個人經驗，希望能給大傢一個參考，也希望大傢多多支持WalkonNet。

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