内容简介：每次在项目中使用spring-security都想调试其内部逻辑，在这里记录一下调试的入口点，以防忘记。调试的入口在另外记住一点：当spring-mvc中配有CORS，并且在spring-security配置中没有将
每次在项目中使用spring-security都想调试其内部逻辑，在这里记录一下调试的入口点，以防忘记。
正文
调试的入口在 org.springframework.security.web.DefaultSecurityFilterChain#DefaultSecurityFilterChain(org.springframework.security.web.util.matcher.RequestMatcher, java.util.List<javax.servlet.Filter>)
public DefaultSecurityFilterChain(RequestMatcher requestMatcher, List<Filter> filters) {
logger.info("Creating filter chain: " + requestMatcher + ", " + filters);
this.requestMatcher = requestMatcher;
this.filters = new ArrayList<>(filters); // 在这里加断点就能看到整个过滤器链了
}
另外记住一点：当spring-mvc中配有CORS，并且在spring-security配置中没有将 CorsConfigurationSource
明确配置到 corsFilter
这个 Bean
上时，spring-security会“借用”spring-mvc中的CORS配置，切勿配置多余的CORS，关于这个行为可从调试 org.springframework.web.filter.CorsFilter
得知（另外官方文档上也明确写了这个行为了）
...
// https://docs.spring.io/spring-security/site/docs/current/reference/htmlsingle/#cors
private CorsConfigurationSource corsConfigurationSource() {
CorsConfiguration corsConfiguration = new CorsConfiguration();
corsConfiguration.setAllowedOrigins(Arrays.asList(webConfigurationProperties.getCors().getAllowedOrigins()));
corsConfiguration.setAllowedMethods(Arrays.asList(webConfigurationProperties.getCors().getAllowedMethods()));
corsConfiguration.setAllowedHeaders(Arrays.asList(webConfigurationProperties.getCors().getAllowedHeaders()));
corsConfiguration.setExposedHeaders(Arrays.asList(webConfigurationProperties.getCors().getExposedHeaders()));
corsConfiguration.setAllowCredentials(webConfigurationProperties.getCors().getAllowCredentials());
corsConfiguration.setMaxAge(webConfigurationProperties.getCors().getMaxAge());
UrlBasedCorsConfigurationSource urlBasedCorsConfigurationSource = new UrlBasedCorsConfigurationSource();
urlBasedCorsConfigurationSource.registerCorsConfiguration(webConfigurationProperties.getCors().getMapping(), corsConfiguration);
return urlBasedCorsConfigurationSource;
}
@Bean
public CorsFilter corsFilter() {
return new CorsFilter(corsConfigurationSource());
}
...
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