The method http.ReadRequest takes a bufio.Reader instead of an io.Reader. What is the reason behind this?
It will use buffered reader anyway. But it will not automatically wrap your io.Reader into buffer because of bufio.Reader nature - it can grab more data from underlying io.Reader that algorithm actually need. And, since underlying io.Reader cannot push back that exceed data, it will remain in that buffer. In case of autowrap that buffer would be lost after request was read and your io.Reader become corrupted. Thus, it ask you to explicitly wrap your reader to prevent data loss.