class Puma::Server

def read_body(env, client, body, cl)


for the body, otherwise a StringIO is used.
If the body is larger than MAX_BODY, a Tempfile object is used

the body and return it.
plus a potential Content-Length value +cl+, finish reading
Given the request +env+ from +client+ and the partial body +body+ 
def read_body(env, client, body, cl)
  content_length = cl.to_i
  remain = content_length - body.bytesize
  return StringIO.new(body) if remain <= 0
  # Use a Tempfile if there is a lot of data left
  if remain > MAX_BODY
    stream = Tempfile.new(Const::PUMA_TMP_BASE)
    stream.binmode
  else
    # The body[0,0] trick is to get an empty string in the same
    # encoding as body.
    stream = StringIO.new body[0,0]
  end
  stream.write body
  # Read an odd sized chunk so we can read even sized ones
  # after this
  chunk = client.readpartial(remain % CHUNK_SIZE)
  # No chunk means a closed socket
  unless chunk
    stream.close
    return nil
  end
  remain -= stream.write(chunk)
  # Raed the rest of the chunks
  while remain > 0
    chunk = client.readpartial(CHUNK_SIZE)
    unless chunk
      stream.close
      return nil
    end
    remain -= stream.write(chunk)
  end
  stream.rewind
  return stream
end