“设计网站”,正版seo搜索引擎,哪些外国购物网站可以做,网站关键词结构文章目录
问题引入
1#xff1a;问题阐述
2#xff1a;问题分析
一#xff1a;从SpringBoot的自动装配
1#xff1a;SpringBootApplication介绍
2#xff1a;自动装配的核心方法
3#xff1a;核心方法的调用路径
4#xff1a;SpringSecurity核心配置
5#xf…文章目录
问题引入
1问题阐述
2问题分析
一从SpringBoot的自动装配
1SpringBootApplication介绍
2自动装配的核心方法
3核心方法的调用路径
4SpringSecurity核心配置
5SpringBoot...Configuration详解
6总结一下 大神链接作者有幸结识技术大神孙哥为好友获益匪浅。现在把孙哥视频分享给大家。 孙哥链接孙哥个人主页 作者简介一个颜值99分只比孙哥差一点的程序员 本专栏简介话不多说让我们一起干翻SpringSecurity6 本文章简介话不多说让我们讲清楚SpringSecurity6中为什么在引入SpringSecurity之后所有的请求都需要先做登录认证才可以进行访问呢 问题引入
1问题阐述 为什么在引入SpringSecurity之后所有的请求都需要先做登录认证才可以进行访问呢
2问题分析 分析清楚这个问题之前我们先从自动装配开始研究。
一从SpringBoot的自动装配
1SpringBootApplication介绍 这个注解的作用就是标志这个类是SpringBootApplication的启动类。
SpringBootApplication
public class BigtreeApplication {public static void main(String[] args) {SpringApplication.run(BigtreeApplication.class, args);}
}
Target({ElementType.TYPE})
Retention(RetentionPolicy.RUNTIME)
Documented
Inherited
SpringBootConfiguration
EnableAutoConfiguration
ComponentScan(excludeFilters {Filter(type FilterType.CUSTOM,classes {TypeExcludeFilter.class}
), Filter(type FilterType.CUSTOM,classes {AutoConfigurationExcludeFilter.class}
)}
)
public interface SpringBootApplication {AliasFor(annotation EnableAutoConfiguration.class)Class?[] exclude() default {};AliasFor(annotation EnableAutoConfiguration.class)String[] excludeName() default {};AliasFor(annotation ComponentScan.class,attribute basePackages)String[] scanBasePackages() default {};AliasFor(annotation ComponentScan.class, attribute basePackageClasses)Class?[] scanBasePackageClasses() default {};AliasFor(annotation ComponentScan.class,attribute nameGenerator)Class? extends BeanNameGenerator nameGenerator() default BeanNameGenerator.class;AliasFor( annotation Configuration.class)boolean proxyBeanMethods() default true;
} 这个注解是一个复合注解SpringBootConfiguration这个注解的作用带表了这当前这个类是一个SpringBoot配置类自动交给SpringIOC容器进行管理。 第二个注解是ComponentScan这个注解的作用是定义Spring的扫描路径的。通畅对应我们自己定义的组件例如ControllerServiceDao这些组件。 第三个注解是EnableAutoConfiguration这个注解是SpringBoot自动装配的关键注解这个注解包含两个核心注解 第一个注解是Import({AutoConfigurationImportSelector.class})这个注解的作用就是在导入当前类的同时顺便导入AutoConfigurationImportSelector这个类也加载进来。
2自动装配的核心方法
org.springframework.boot.autoconfigure.AutoConfigurationImportSelector#getCandidateConfigurations
protected ListString getCandidateConfigurations(AnnotationMetadata metadata, AnnotationAttributes attributes) {ListString configurations ImportCandidates.load(AutoConfiguration.class, getBeanClassLoader()).getCandidates();Assert.notEmpty(configurations,No auto configuration classes found in META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports. If you are using a custom packaging, make sure that file is correct.);return configurations;}
org.springframework.boot.context.annotation.ImportCandidates
public static ImportCandidates load(Class? annotation, ClassLoader classLoader) {Assert.notNull(annotation, annotation must not be null);ClassLoader classLoaderToUse decideClassloader(classLoader);String location String.format(LOCATION, annotation.getName());EnumerationURL urls findUrlsInClasspath(classLoaderToUse, location);ListString importCandidates new ArrayList();while (urls.hasMoreElements()) {URL url urls.nextElement();importCandidates.addAll(readCandidateConfigurations(url));}return new ImportCandidates(importCandidates);} 此方法执行完毕的返回值 这个配置在spring-boot-autoconfigure-3.0.12.jar包下!\META-INF\spring\包下的 org.springframework.boot.autoconfigure.AutoConfiguration.imports文件中这里边就是Spring中的各种需要自动装配的组件。其中就有很多的配置组件。 3核心方法的调用路径
main1 prio5 tid0x1 nidNA runnablejava.lang.Thread.State: RUNNABLEat org.springframework.boot.context.annotation.ImportCandidates.load(ImportCandidates.java:90)at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.getCandidateConfigurations(AutoConfigurationImportSelector.java:180)at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.getAutoConfigurationEntry(AutoConfigurationImportSelector.java:126)at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector$AutoConfigurationGroup.process(AutoConfigurationImportSelector.java:430)at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorGrouping.getImports(ConfigurationClassParser.java:796)at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorGroupingHandler.processGroupImports(ConfigurationClassParser.java:726)at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorHandler.process(ConfigurationClassParser.java:697)at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:182)at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:415)at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:287)at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:344)at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:115)at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:779)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:597)- locked 0x12a7 (a java.lang.Object)at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146)at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:733)at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:435)at org.springframework.boot.SpringApplication.run(SpringApplication.java:311)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290)at com.dashu.AlibabaApplication.main(AlibabaApplication.java:10) 这个调用路径是怎么获得的方法很简单只需要在这个核心方法的中间打上一个断点。 然后我们启动main方法等线程执行过这个方法的断点。然后我们在idea上玩一个骚操作就可以了。 然后我们在debug区域找到最上层一个方法然后我们右键Exports Thread即可。 4SpringSecurity核心配置
org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration
AutoConfiguration
ConditionalOnClass(DefaultAuthenticationEventPublisher.class)
EnableConfigurationProperties(SecurityProperties.class)
Import({ SpringBootWebSecurityConfiguration.class, SecurityDataConfiguration.class })
public class SecurityAutoConfiguration {BeanConditionalOnMissingBean(AuthenticationEventPublisher.class)public DefaultAuthenticationEventPublisher authenticationEventPublisher(ApplicationEventPublisher publisher) {return new DefaultAuthenticationEventPublisher(publisher);}} 然后就会加载这两个组件SpringBootWebSecurityConfiguration.class, SecurityDataConfiguration.class 尤其是第一个。
5SpringBoot...Configuration详解 这里边只有一个Bean注解最终会创建一个对象SecurityFilterChain为什么最终引入了SpringSecurity依赖之后就会所有的请求都会被拦截答案就在这个方法里边。 BeanOrder(SecurityProperties.BASIC_AUTH_ORDER)SecurityFilterChain defaultSecurityFilterChain(HttpSecurity http) throws Exception {//任意Http请求都会被认证拦截http.authorizeHttpRequests().anyRequest().authenticated();//认证的时候支持form表单认证http.formLogin();//http的basic认证http.httpBasic();return http.build();}
Configuration(proxyBeanMethods false)
ConditionalOnWebApplication(type Type.SERVLET)
class SpringBootWebSecurityConfiguration {Configuration(proxyBeanMethods false)ConditionalOnDefaultWebSecuritystatic class SecurityFilterChainConfiguration {BeanOrder(SecurityProperties.BASIC_AUTH_ORDER)SecurityFilterChain defaultSecurityFilterChain(HttpSecurity http) throws Exception {http.authorizeHttpRequests().anyRequest().authenticated();http.formLogin();http.httpBasic();return http.build();}}Configuration(proxyBeanMethods false)ConditionalOnMissingBean(name BeanIds.SPRING_SECURITY_FILTER_CHAIN)ConditionalOnClass(EnableWebSecurity.class)EnableWebSecuritystatic class WebSecurityEnablerConfiguration {}}
6总结一下 基于SpringBoot的自动装配由于SpringSecurity的装配配置在SpringBoot配置环境中所以它默认会被加载加载完毕之后defaultSecurityFilterChain被调用SecurityFilterChain对象被创创建。所有的方法都会被被鉴权。 具体的方法调用路径或者叫配置路径是这样的首先是三个核心的注解
SpringBootApplication- EnableAutoConfigurationImport(AutoConfigurationImportSelector) 这样的代码就会基于下面这个调用路径
main1 prio5 tid0x1 nidNA runnablejava.lang.Thread.State: RUNNABLEat org.springframework.boot.context.annotation.ImportCandidates.load(ImportCandidates.java:90)at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.getCandidateConfigurations(AutoConfigurationImportSelector.java:180)at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector.getAutoConfigurationEntry(AutoConfigurationImportSelector.java:126)at org.springframework.boot.autoconfigure.AutoConfigurationImportSelector$AutoConfigurationGroup.process(AutoConfigurationImportSelector.java:430)at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorGrouping.getImports(ConfigurationClassParser.java:796)at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorGroupingHandler.processGroupImports(ConfigurationClassParser.java:726)at org.springframework.context.annotation.ConfigurationClassParser$DeferredImportSelectorHandler.process(ConfigurationClassParser.java:697)at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:182)at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:415)at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:287)at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:344)at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:115)at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:779)at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:597)- locked 0x12a7 (a java.lang.Object)at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146)at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:733)at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:435)at org.springframework.boot.SpringApplication.run(SpringApplication.java:311)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290)at com.dashu.AlibabaApplication.main(AlibabaApplication.java:10) 调用到这个方法里边AutoConfigurationImportSelector#getCandidateConfigurations最后查到核心组件的配置文件。这样加载到SpringSecurity的核心文件。最终调用到上边的方法导致所有的方法都得进行登录认证。
二默认认证方式的条件限制
1ConditionalOnDefaultWebSecurity 此注解显示了要想使用下面SpringSecurity的默认认证方式是有条件的。 也就是说并不是所有的Http请求都必须走默认认证。进入这个注解
Target({ ElementType.TYPE, ElementType.METHOD })
Retention(RetentionPolicy.RUNTIME)
Documented
Conditional(DefaultWebSecurityCondition.class)
public interface ConditionalOnDefaultWebSecurity {} 这个注解上边还有一个注解Conditional(DefaultWebSecurityCondition.class)
class DefaultWebSecurityCondition extends AllNestedConditions {DefaultWebSecurityCondition() {super(ConfigurationPhase.REGISTER_BEAN);}ConditionalOnClass({ SecurityFilterChain.class, HttpSecurity.class })static class Classes {}ConditionalOnMissingBean({ SecurityFilterChain.class })static class Beans {}} 在这个类当中我们定义了两种鉴权规则。第一种是基于Class他是基于类作用也就是说当前在classpath下如果有上述两个class的话就可以走默认的认证方式。在SpringSecurity中肯定是有的这也就是在引入SpringSecurity依赖之后就会走默认的配置。 第二种是基于丢失Bean的情况如果丢失了那么我们可以走默认的认证规则了。也就是说如果没有了SecurityFilterChain这个对象的话那么就不在使用默认的认证规则了。
