Spring-cloud-gateway: How can I get response body size of a request in gateway?

[ShahzebAnsari]

I have created a custom filter in which I want to access size of response body. Is there anyway?

[spencergibb]

Either the content length header or read the whole response body into memory.

[ShahzebAnsari]

Actually I am new to spring framework and backend.

I tried the content length header. It worked. but sometime we didn't get this header from microservice.

Could you please share a small code for your second method (read the whole response body into memory)? like in term of ServerWebExchange or ServerHttpResponse.

[fzyzcjy]

same question here. any updates?