Spring Security之默認(rèn)的過(guò)濾器鏈及自定義Filter操作

更新時(shí)間：2021年06月22日 16:31:34 作者：咸魚(yú)最牛逼

這篇文章主要介紹了Spring Security之默認(rèn)的過(guò)濾器鏈及自定義Filter操作，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。如有錯(cuò)誤或未考慮完全的地方，望不吝賜教

Spring Security 過(guò)濾器鏈及自定義Filter

別名	類(lèi)名稱(chēng)	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(guò)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(yú)
 * @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(diào)用");
        chain.doFilter(request, response);
    }
}

配置自定義 Filter 在 Spring Security 過(guò)濾器鏈中的位置

配置很簡(jiǎn)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 后添加 AfterCsrfFilter
        http.addFilterAfter(new AfterCsrfFilter(), CsrfFilter.class);
    }

說(shuō)明：

HttpSecurity 有三個(gè)常用方法來(lái)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 之后添加 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(guò)在不同 Filter 的 doFilter() 方法中加斷點(diǎn)調(diào)試，可以判斷哪個(gè) filter 先執(zhí)行，從而判斷 filter 的執(zhí)行順序。

spring security添加自定義過(guò)濾器

1、定義自己的過(guò)濾器

2、指定位置，通過(guò)HttpSecurity的方法指定

定義過(guò)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(gè)方法，指定過(guò)濾器的位置，一個(gè)指定在誰(shuí)前面，一個(gè)指定在誰(shuí)后面。

   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(cè)試

準(zhǔn)備一個(gè)端點(diǎn)測(cè)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";
    }
}

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