SocketServer.py笔记

在模块中定义__all__的作用：

只在from module import *时起作用。对from module import member没有影响。

def _eintr_retry(func, *args):
"""restart a system call interrupted by EINTR"""
while True:
try:
return func(*args)
except (OSError, select.error) as e:
if e.args[0] != errno.EINTR:
raise

BaseServer对外提供一些方法：

__init__

serve_forever

shutdown

handle_request() # if you do not use serve_forever()

fileno() # for select()

TCPServer UnixStreamServer

UDPServer UnixDatagramServer

ForkingMixIn ThreadingMixIn

ForkingTCPServer ForkingUDPServer

ThreadingTCPServer ThreadingUDPServer

BaseRequestHandler handle()

StreamRequestHandler

DatagramRequestHandler

其中StreamRequestHandler提供了rfile, wfile。可以通过读写文件的方式访问socket。

StringIO. This module implements a file-like class, that reads and writes string buffer(also known as memory files).

StringIO.write(‘xxx’)

StringIO.getvalue()