基于springboot2.0 下 shiro导致post请求跨域失败

1.首先我们需要配置一下跨域

import com.factory.utils.interceptor.AuthorizationInterceptor;
import com.factory.utils.resolver.LoginUserHandlerMethodArgumentResolver;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.method.support.HandlerMethodArgumentResolver;
import org.springframework.web.servlet.config.annotation.*;

import java.util.List;


@Configuration
public class WebConfig implements WebMvcConfigurer {
    //application.properties中添加允许跨域的地址
    @Value("#{'${spring.config.allowedOrigins}'.split(',')}")
    private String[] allowedOrigins;

    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins(allowedOrigins)
                .allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS")
                .allowCredentials(true).maxAge(3600);
    }
}

当我们配置跨域之后依然会有跨域问题

2. OPTIONS 请求出现跨域

在跨域访问的场景下, 正式访问之前增加的一次预检性质访问,以确定能否正确获取所请求的资源.

通常是OPTIONS 请求正常返回status 200,然后才发起正式的GET/POST等访问,但因为Shiro配置了URL过滤, 对于OPTIONS Request也进行了拦截,所以无法继续访问.

解决方案 isAccessAllowed

让Shiro对OPTIONS Request不进行鉴权操作

import org.apache.shiro.subject.Subject;
import org.apache.shiro.web.filter.authc.FormAuthenticationFilter;
import org.apache.shiro.web.util.WebUtils;
import org.springframework.core.annotation.Order;
import org.thymeleaf.util.StringUtils;

import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

/**
 * 解决因跨域问题第一次请求为OPTIONS 导致shiro以为没有登录而返回302
 * 
 */
@Order(1000)
public class MyFormAuthCorsFilter extends FormAuthenticationFilter {

    @Override
    protected boolean onAccessDenied(ServletRequest request, ServletResponse response) throws Exception {
        // 获取当前登录
        Subject subject = getSubject(request, response);
        if (subject.getPrincipal() == null) {
            // 使用response响应流返回数据到前台（因前端需要接受json数据，注意前后端跨域问题）
            return false;
        } else {
            return true;
        }
    }

    //isAccessAllowed
    @Override
    protected boolean isAccessAllowed(ServletRequest request, ServletResponse response, Object mappedValue) {
        boolean allowed = super.isAccessAllowed(request, response, mappedValue);
        if (!allowed) {
            // 判断请求是否是options请求。
            String method = WebUtils.toHttp(request).getMethod();
            if (StringUtils.equalsIgnoreCase("OPTIONS", method)) {
                return true;
            }
        }
        return allowed;
    }
}

Map filters = new LinkedHashMap<>();
filters.put("authc", new MyFormAuthCorsFilter());
shiroFilter.setFilters(filters);