SpringCloudGateway(SCG) - CORS 설정

- SCG에서 CORS 관련 "globalcors" 속성으로 cors 설정 가능

spring:
  cloud:
    gateway:
      globalcors:
        corsConfigurations:
          '[/**]':
            allowedOrigins: "*"
            allow-credentials: false
            allowedHeaders: "*"
            allowedMethods: "*"

 

 

 

- CORS 설정 중에 아래와 같은 header contains multiple values 에러 발생 시 

Access to XMLHttpRequest at ' https://XXX' from origin 'https://YYY' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values ' https://YYY, https://YYY', but only one is allowed.

"default-filters" RETAIN_UNIQUE 설정 추가

spring:
  cloud:
    gateway:
      default-filters:
        - DedupeResponseHeader=Access-Control-Allow-Origin Access-Control-Allow-Credentials, RETAIN_UNIQUE
      globalcors:
        corsConfigurations:
          '[/**]':
            allowedOrigins: "http://localhost:8089"
            allow-credentials: true
            allowedHeaders: "*"
            allowedMethods: "*"