HttpRespToString parses the body as string and checks the HTTP status code, it closes the body reader at the end.

JSONDecoder returns JSON decoder for given string.

JSONSize returns the size in bytes of the json encoding of i.

SplitSlice2Chunks - *recursively* splits a slice to chunks of sub slices that do not exceed max bytes size Returns a channels for receiving []T chunks and the original len of []T If []T is empty the function will return a closed chunks channel Chunks might be bigger than max size if the slice contains element(s) that are bigger than the max size this split algorithm fits for slices with elements that share more or less the same size per element uses optimistic average size splitting to enhance performance and reduce the use of json encoding for size calculations chunks channel will be closed after splitting is done.