Hi I want to have a filter header/body that makes an asynchronous call. On success, a completion handler is called. The result of this completion handler decides the output of filter header/body. I understand subrequest can be used to do this. But are there alternatives to this?
Lets say, I want to filter the body of the response to uppercase the body after 10 secs, how do I do that? This is what I tried: 1. In the body filter, create a timer, set the handler to my function, and return NGX_DONE 2. In the handler, I call the next_body_filter This works but there are edgecases that I am not sure how to handle, e.g. how to handle errors from next_body_filter, (specifically NGX_AGAIN) and so on. Pointers will be greatly appreciated. Thanks!
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