High memory usage for needless(?) validation of application/octet-stream

[ellabambasek]

For ValidateRequestBody the whole body of the request gets loaded into memory via io.ReadAll (1)
The default FileBodyDecoder(2) then also just string()s the data and returns it again

In my application this, and the following validation causes a memory usage if around 10GB when uploading a 1GB file.
From what I can tell ValidateRequestBody doesn't do any useful work on application/octet-stream data(correct me if I'm wrong please)

(1) https://github.com/getkin/kin-openapi/blob/master/openapi3filter/validate_request.go#L269
(2) https://github.com/getkin/kin-openapi/blob/master/openapi3filter/req_resp_decoder.go#L1556

[juan-carvajal]

Same issue here...I even think the entire body is being read into memory more than once. Same thing but even worse is happening with the ZipFileBodyDecoder

[juan-carvajal]

It should be possible to do binary payload validation via streaming; otherwise, it is unfeasible to work with even medium files.