Spring Cloud Gateway后面的Camunda未返回cockpit的CSS文件

Question

我有一个Camunda实例嵌入到一个Spring Boot应用程序（称为service-workflow）中，该应用程序在一个动态端口上启动，通过Eureka向Spring Cloud注册。

Camunda服务的主要类如下：

@EnableDiscoveryClient
@SpringBootApplication
@EnableConfigurationProperties(ServiceContextConfig.class)
public class WorkflowServiceApplication {

    public static void main(String[] args) {
        SpringApplication.run(WorkflowServiceApplication.class, args);
    }
}

和配置属性：

server.port=0
eureka.client.healthcheck.enabled=true

这些服务位于本地Spring Cloud网关后面，该网关运行在使用Eureka注册主机的端口上，可以通过http://localhost:8080访问和路由

网关的代码是：

@SpringBootApplication
@EnableDiscoveryClient
public class GatewayServiceApplication {

    public static void main(String[] args) {
        SpringApplication.run(GatewayServiceApplication.class, args);
    }
}

和配置属性：

server.port=8080
spring.cloud.gateway.discovery.locator.enabled=true
spring.cloud.gateway.discovery.locator.lowerCaseServiceId=true

任何使用runtimeService的客户端都可以使用feign启动工作流，其URL为:feign.client.config.remoteruntimeService.url=service-workflow/rest/

因此，可以通过REST API的网关URL访问工作流服务。

当Camunda服务启动并被分配端口x时，我可以通过http://localhost:x/app/cockpit/default/查看驾驶舱。但是，如果我尝试通过网关（http://localhost:8080/service-workflow/app/cockpit/default/)，它将无法返回任何CSS文件，网关日志显示：

2020-09-25 16:46:00,454 DEBUG [reactor-http-nio-2] reactor.netty.http.server.HttpServer (Loggers.java:254) - [id: 0xe08516d1, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:61018] Handler is being applied: org.springframework.http.server.reactive.ReactorHttpHandlerAdapter@74cedfb5
2020-09-25 16:46:00,453 DEBUG [reactor-http-nio-8] org.springframework.web.server.adapter.HttpWebHandlerAdapter (LogFormatUtils.java:91) - [9407161c-27] HTTP GET "/app/cockpit/styles/styles.css?bust=7.12.0"
2020-09-25 16:46:00,456 DEBUG [reactor-http-nio-2] org.springframework.web.server.adapter.HttpWebHandlerAdapter (LogFormatUtils.java:91) - [e08516d1-28] HTTP GET "/app/cockpit/styles/user-styles.css?bust=7.12.0"
2020-09-25 16:46:00,455 DEBUG [reactor-http-nio-7] reactor.netty.http.server.HttpServer (Loggers.java:254) - [id: 0x125a09dc, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:61253] Handler is being applied: org.springframework.http.server.reactive.ReactorHttpHandlerAdapter@74cedfb5
2020-09-25 16:46:00,458 DEBUG [reactor-http-nio-8] org.springframework.web.reactive.handler.SimpleUrlHandlerMapping (AbstractHandlerMapping.java:183) - [9407161c-27] Mapped to ResourceWebHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/"]
2020-09-25 16:46:00,460 DEBUG [reactor-http-nio-7] org.springframework.web.server.adapter.HttpWebHandlerAdapter (LogFormatUtils.java:91) - [125a09dc-29] HTTP GET "/app/cockpit/styles/styles-components.css?bust=7.12.0"
2020-09-25 16:46:00,460 DEBUG [reactor-http-nio-2] org.springframework.web.reactive.handler.SimpleUrlHandlerMapping (AbstractHandlerMapping.java:183) - [e08516d1-28] Mapped to ResourceWebHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/"]
2020-09-25 16:46:00,463 DEBUG [reactor-http-nio-8] org.springframework.web.reactive.resource.ResourceWebHandler (ResourceWebHandler.java:324) - [9407161c-27] Resource not found
2020-09-25 16:46:00,464 DEBUG [reactor-http-nio-7] org.springframework.web.reactive.handler.SimpleUrlHandlerMapping (AbstractHandlerMapping.java:183) - [125a09dc-29] Mapped to ResourceWebHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/"]
2020-09-25 16:46:00,465 DEBUG [reactor-http-nio-2] org.springframework.web.reactive.resource.ResourceWebHandler (ResourceWebHandler.java:324) - [e08516d1-28] Resource not found
2020-09-25 16:46:00,466 DEBUG [reactor-http-nio-7] org.springframework.web.reactive.resource.ResourceWebHandler (ResourceWebHandler.java:324) - [125a09dc-29] Resource not found
2020-09-25 16:46:00,469 DEBUG [reactor-http-nio-2] org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler (CompositeLog.java:147) - [e08516d1-28] Resolved [ResponseStatusException: 404 NOT_FOUND] for HTTP GET /app/cockpit/styles/user-styles.css
2020-09-25 16:46:00,468 DEBUG [reactor-http-nio-8] org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler (CompositeLog.java:147) - [9407161c-27] Resolved [ResponseStatusException: 404 NOT_FOUND] for HTTP GET /app/cockpit/styles/styles.css
2020-09-25 16:46:00,476 DEBUG [reactor-http-nio-2] org.springframework.core.codec.CharSequenceEncoder (CompositeLog.java:147) - [e08516d1-28] Writing "<html><body><h1>Whitelabel Error Page</h1><p>This application has no configured error view, so you  (truncated)...
2020-09-25 16:46:00,479 DEBUG [reactor-http-nio-7] org.springframework.boot.autoconfigure.web.reactive.error.AbstractErrorWebExceptionHandler (CompositeLog.java:147) - [125a09dc-29] Resolved [ResponseStatusException: 404 NOT_FOUND] for HTTP GET /app/cockpit/styles/styles-components.css
2020-09-25 16:46:00,477 DEBUG [reactor-http-nio-8] org.springframework.core.codec.CharSequenceEncoder (CompositeLog.java:147) - [9407161c-27] Writing "<html><body><h1>Whitelabel Error Page</h1><p>This application has no configured error view, so you  (truncated)...
2020-09-25 16:46:00,480 DEBUG [reactor-http-nio-7] org.springframework.core.codec.CharSequenceEncoder (CompositeLog.java:147) - [125a09dc-29] Writing "<html><body><h1>Whitelabel Error Page</h1><p>This application has no configured error view, so you  (truncated)...
2020-09-25 16:46:00,480 DEBUG [reactor-http-nio-2] reactor.netty.http.server.HttpServerOperations (Loggers.java:254) - [id: 0xe08516d1, L:/0:0:0:0:0:0:0:1:8080 - R:/0:0:0:0:0:0:0:1:61018] Decreasing pending responses, now 0

Answer 1

我最终解决这个问题的方法是在网关中添加一个自定义路由：

.route("camunda", r -> r.path("/camunda/**")
        //.filters(f -> f.rewritePath("/report/(?<segment>.*)", "/${segment}"))
        .uri("lb://my-camunda-service"))