logging.statistics doesn't work in Python 3

[danielpcox]

I just set logging.statistics['WSGIserver whateverid']['Enabled'] = True and it crashed, telling me BufferReader doesn't have an attribute bytes_read, which is true. It looks like the problem stems from HTTPConnection's use of CP_makefile_PY3 in Python 3 which returns io.BufferedReader, and CP_makefile_PY2 in Python 2, which returns a custom thing that has a bytes_read attribute.

[danielpcox]

Here's the monkeypatching I'm currently doing to work around this problem:

####################################################################################
## Monkey patches for wsgiserver to fix statistics collection
####################################################################################
import io
import socket
import wsgiserver

class CP_BufferedReader(io.BufferedReader):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.bytes_read = 0
    def read(self, *args, **kwargs):
        bs = super().read(*args, **kwargs)
        self.bytes_read += len(bs)
        return bs
    def readline(self, *args, **kwargs):
        bs = super().readline(*args, **kwargs)
        self.bytes_read += len(bs)
        return bs

class CP_BufferedWriter(wsgiserver.CP_BufferedWriter):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.bytes_written = 0
    def write(self, b):
        s = super().write(b)
        self.bytes_written += s
        return s

def CP_makefile_PY3(sock, mode='r', bufsize=io.DEFAULT_BUFFER_SIZE):
    if 'r' in mode:
        return CP_BufferedReader(socket.SocketIO(sock, mode), bufsize)
    else:
        return CP_BufferedWriter(socket.SocketIO(sock, mode), bufsize)

wsgiserver.CP_makefile = CP_makefile_PY3
####################################################################################

[danielpcox]

I also get an error when I first enable statistics, and behavior gets wonky:

Exception in thread CP Server Thread-9:
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/threading.py", line 932, in _bootstrap_inner
    self.run()
  File "/root/.local/share/virtualenvs/app-4PlAip0Q/lib/python3.8/site-packages/wsgiserver.py", line 1579, in run
    self.work_time += time.time() - self.start_time
TypeError: unsupported operand type(s) for -: 'float' and 'NoneType'