I’m using Spring Cloud Gateway to route requests to several microservices, each with its own Swagger documentation. My goal is to access all the Swagger documentation via the Gateway’s Swagger UI. However, I am encountering an issue where the Swagger UI static resources are not being routed correctly.

Gateway Configuration
Here is my current application.yml configuration for the Gateway:

spring:
  application:
    name: gateway
  cloud:
    gateway:
      routes:
        - id: product
          uri: ${system-configuration.endpoints.product-service}
          predicates:
            - Path=/api/products/**
        - id: recommendation
          uri: ${system-configuration.endpoints.recommendation-service}
          predicates:
            - Path=/api/recommendations/**
        - id: review
          uri: ${system-configuration.endpoints.review-service}
          predicates:
            - Path=/api/reviews/**

springdoc:
  api-docs:
    enabled: true
  swagger-ui:
    enabled: true
    path: /swagger-ui.html
    config-url: /v3/api-docs/swagger-config
    urls:
      - url: /v3/api-docs
        name: API Gateway Service
      - name: product-service
        url: /api/products/v3/api-docs
      - name: recommendation-service
        url: /api/recommendations/v3/api-docs
      - name: review-service
        url: /api/reviews/v3/api-docs

logging:
  level:
    org.springframework.cloud.gateway: TRACE

Microservice Configuration
Each microservice has a similar Swagger configuration. Here’s an example for the product-service:

spring:
  application:
    name: product-service

springdoc:
  api-docs:
    path: /api/products/v3/api-docs
  swagger-ui:
    path: /api/products/swagger-ui.html

Issue
When I try to access the Swagger UI through the Gateway (e.g., http://localhost:8080/swagger-ui.html), I get the following error in the Gateway logs:

No RouteDefinition found for [Exchange: GET http://localhost:8080/webjars/swagger-ui/index.html]

Gateway Logs:

2024-08-03T22:08:50.590+03:00 TRACE 16148 --- [gateway] [ctor-http-nio-4] o.s.c.g.h.RoutePredicateHandlerMapping   : No RouteDefinition found for [Exchange: GET http://localhost:8080/webjars/swagger-ui/index.html]
2024-08-03T22:08:50.824+03:00 TRACE 16148 --- [gateway] [ctor-http-nio-4] o.s.c.g.f.WeightCalculatorWebFilter      : Weights attr: {}
2024-08-03T22:08:50.825+03:00 TRACE 16148 --- [gateway] [ctor-http-nio-4] o.s.c.g.h.p.PathRoutePredicateFactory    : Pattern "[/api/products/**, /api/products/v3/api-docs]" does not match against value "/webjars/swagger-ui/$%7Bserver.servlet.contextPath%7D/v3/api-docs/swagger-config"
2024-08-03T22:08:50.825+03:00 TRACE 16148 --- [gateway] [ctor-http-nio-4] o.s.c.g.h.p.PathRoutePredicateFactory    : Pattern "[/api/recommendations/**]" does not match against value "/webjars/swagger-ui/$%7Bserver.servlet.contextPath%7D/v3/api-docs/swagger-config"
2024-08-03T22:08:50.825+03:00 TRACE 16148 --- [gateway] [ctor-http-nio-4] o.s.c.g.h.p.PathRoutePredicateFactory    : Pattern "[/api/reviews/**]" does not match against value "/webjars/swagger-ui/$%7Bserver.servlet.contextPath%7D/v3/api-docs/swagger-config"
2024-08-03T22:08:50.825+03:00 TRACE 16148 --- [gateway] [ctor-http-nio-4] o.s.c.g.h.RoutePredicateHandlerMapping   : No RouteDefinition found for [Exchange: GET http://localhost:8080/webjars/swagger-ui/$%7Bserver.servlet.contextPath%7D/v3/api-docs/swagger-config]