Spring Boot Preflight 请求未通过访问控制检查

Question

我在我的 Web 应用程序中使用 Spring Boot 和 Spring Security。现在我有一个 /api/login 端点，前端只需在请求正文中发布用户名和密码即可获取 JWT。

但我不断得到

Access to fetch at 'http://localhost:8081/api/login' from origin 'http://localhost:3001' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: It does not have HTTP ok status.

我已经在控制器类上添加了 @CrossOrigin(origins = "*",maxAge = 3600) 来解决 cors 问题，所以现在 http get 工作正常。但是由于预检，所有帖子都不起作用。我也试过了

.requestMatchers(CorsUtils::isPreFlightRequest).permitAll()

和

.and().cors();

在我的 WebSecurityConfigurerAdapter 中，但没有一个能解决问题。接下来我该怎么做？

这是完整的配置类：

package com.cyf.myblogserver.config;

import com.cyf.myblogserver.component.JwtRequestFilter;
import com.cyf.myblogserver.service.BlogUserDetailsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.web.cors.CorsUtils;

@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Autowired
    private BlogUserDetailsService BlogUserDetailsService;
    @Autowired
    JwtRequestFilter jwtRequestFilter;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(BlogUserDetailsService);
    }

    @Bean
    public PasswordEncoder passwordEncoder(){
        return NoOpPasswordEncoder.getInstance();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
                .authorizeRequests()
                .requestMatchers(CorsUtils::isPreFlightRequest).permitAll()
                .antMatchers(HttpMethod.POST,"/api/token").permitAll()
                .antMatchers(HttpMethod.GET, "/api/articles").permitAll()
                .anyRequest().authenticated().and().cors();
        http.addFilterBefore(jwtRequestFilter, UsernamePasswordAuthenticationFilter.class);
        http.headers().cacheControl();
    }

    @Bean
    public AuthenticationManager customAuthenticationManager() throws Exception {
        return authenticationManager();
    }
}

Answer 1

如果您使用的是 spring security，请为您的 cors 进行全局设置，例如：

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(HttpSecurity http) throws Exception { 
         http.
         cors().and().csrf().disable()
                .authorizeRequests()                                                                
                .antMatchers("/**").permitAll()
                .antMatchers("/login").hasRole("ADMIN")                                      
                .antMatchers("/Signup").hasRole("USER")
                .and() //add rest of your configurations
    }

    @Bean   
    public CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(Arrays.asList("http://localhost:3001")); //or add * to allow all origins
        configuration.setAllowCredentials(true);
        configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS")); //to set allowed http methods
        configuration.setAllowedHeaders(Arrays.asList("Authorization", "Cache-Control", "Content-Type"));
        configuration.setExposedHeaders(Arrays.asList("custom-header1", "custom-header2"));
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration); 
        return source; 
    }
}

当您在全局范围内提供这样的配置时，代码会更加简洁，您也可以根据需要提供配置，它将适用于所有控制器及其方法。确保 spring 自动配置工作，我们提供 cors 配置 bean 并在 spring 安全性上启用 cors，因此如果自动配置工作，spring 将自动使用我们使用配置创建的 cors bean。