RewritePath Spring Cloud Gateway 的 CORS 问题

Question

我有三个带有 Micronaut 的微服务和一个带有 Spring Boot 的 Spring Cloud Gateway：

1. 评估
2. 评估-Bff
3. 课程

我已经使用下面的 YAML 配置了网关：

spring:
  application:
    name: spring-api-gateway
  cloud:
    gateway:
      globalcors:
        cors-configurations:
          '[/**]':
            allowedOrigins: "*"
            allowedHeaders: "*"
            allowedMethods:
              - GET
              - POST
              - PUT
              - DELETE
              - OPTIONS
              - HEAD
              - PATCH
              - TRACE
      routes:
        - id: course-service
          uri:
            ${COURSE_SERVICE_URL:http://localhost:8081}
          predicates:
            - Path=/course/**, /swagger/**
        - id: assessment-service-get
          uri: ${ASSESSMENT_BFF_SERVICE_URL:http://localhost:8083}
          predicates:
            - Path=/assessment/**
            - Method=GET
          filters:
            - RewritePath=/assessment/, /bff/assessment/

每个微服务都启用了CORS配置，如下

micronaut.server.cors=true

没有RewritePath我就没有脸CORS。然而，当使用 RewritePath 时，请保持从前端面向 CORS

Access to XMLHttpRequest at 'http://localhost:8080/assessment' from origin 'http://localhost:4200' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Answer 1

对我来说问题是我在方法上缺少选项

spring:
  application:
    name: spring-api-gateway
  cloud:
    gateway:
      globalcors:
        cors-configurations:
          '[/**]':
            allowedOrigins: "http://localhost:4200"
            allowedHeaders: "*"
            allowedMethods:
              - GET
              - POST
              - PUT
              - DELETE
              - OPTIONS
              - HEAD
              - PATCH
      routes:
        - id: course-service
          uri:
            ${COURSE_SERVICE_URL:http://localhost:8081}
          predicates:
            - Path=/course/**, /swagger/**
        - id: assessment-service-get
          uri:
            ${COURSE_SERVICE_URL:http://localhost:8083}
          predicates:
            - Path=/assessment/**
            - Method=GET,OPTIONS <-- adding OPTIONS resolve the issue
          filters:
            - RewritePath=/assessment/?(?<segment>.*), /bff/assessment/$\{segment}
        - id: assessment-service-post-put-delete
          uri:
            ${COURSE_SERVICE_URL:http://localhost:8082}
          predicates:
            - Path=/assessment/**
            - Method=POST,PUT,DELETE,OPTIONS <-- adding OPTIONS resolve the issue