Throw exception when request rate limiter denys request

[tianmingxing]

1. When the current limiting mechanism is triggered, the gateway responds to the status code 429 to the client, but I want the client to always accept only the 200 status code. Any error message is prompted by the response data. How can I capture this situation?
2. I tried to write a class that inherits DefaultErrorAttributes to implement, but found that this exception was not caught at all.

[ryanjbaxter]

The configuration object for the rate limiter filter allows you to configure the status code

spring-cloud-gateway/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/factory/RequestRateLimiterGatewayFilterFactory.java

Line 125 in 4ea874a

private HttpStatus statusCode = HttpStatus.TOO_MANY_REQUESTS;

[tianmingxing]

In addition to modifying the response code, I also need to define the information returned. I want to be able to return what the client can parse when triggering a current limit, as shown below:

{
  "timestamp": "2019-01-20T19:55:39.814",
  "code": 1008,
  "message": "too many connections."
}

[spencergibb]

Does your error attributes class have the proper order? https://www.baeldung.com/spring-webflux-errors

[tianmingxing]

The code I've written is shown below, and the component startup sequence is the same as in the article.

I want to catch the exception caused by the current limit, but it doesn't seem to be a mistake, so it is not caught. But I need to customize the response content in this case, otherwise the client can't parse the recognition.

[ryanjbaxter]

I dont think the rate request filter is actually returning an exception when there are too many request so I dont think the handler would come into play

spring-cloud-gateway/spring-cloud-gateway-core/src/main/java/org/springframework/cloud/gateway/filter/factory/RequestRateLimiterGatewayFilterFactory.java

Line 111 in 4ea874a

setResponseStatus(exchange, config.getStatusCode());

[tianmingxing]

1. Sorry, I don't understand what you mean.
2. I have to return what the client can understand. The process of processing the content is the same. It does not need to be handled differently for different situations. This will increase the processing of the response information by the client.