When doing IO with the underlying stream object, we should handle
the special case of ErrorKind::Interrupted, otherwise the connection
will be closed incorrectly.
Quotation from Rust doc:
An error of the [`ErrorKind::Interrupted`] kind is non-fatal and the
read operation should be retried if there is nothing else to do.
Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>
Route request according to {method, path} tuple, so we could use only
one router for each http server.
Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>