proxy-wasm-cpp-sdk

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I deployed Envoy wasm plugin in Istio environment,  and use wasm c++ sdk to operate on http requests，I found that the current onRequestBody method does not seem to have a cache operation for the request body, what I want is to have this cache operation so that the request or response body can be accumulated to a certain size before being detected and processed.for example, I can set a buffer size of 10K, only when the request payload accumulated to 10K can trigger the processing logic. Is there any consideration for this in the future ? or Envoy already has this configuration, looking forward to your reply. Also,Does wasm currently support breakpoint debugging inside the envoy wasm sandbox using a gdb-like approach?

I think you can define a 10K buffer in stream context, if the bodysize >0, then cache it by each call onReq/RespBody. The only I worried whether it can definitively call onReq/RespBody() once it is endStream