python单线程下实现多个socket并发过程详解

python单线程下实现多个socket并发过程详解

先看服务端的代码

import sys
# import socket
import time
import gevent
from gevent import socket
from gevent import monkey
monkey.patch_all()
#类似于python中的黑魔法，把很多模块的阻塞的变成非阻塞的，比如socket中的rece和send都变
# 为不阻塞了
 
 
def server(port):
  s = socket.socket()
  s.bind(("127.0.0.1",port))
  s.listen(2000)
  while True:
    cli,add = s.accept()
    gevent.spawn(handle_request,cli)
    #通过gevent的启动一个协程，把客户端的socket对象传进去
def handle_request(s):
  try:
    while True:
      data = s.recv(1024)
      print("收到的信息:",str(data,encoding="utf-8"))
      s.send(data)
      if not data:
 s.shutdown(socket.SHUT_WR)
 #把和客户端这个链接销毁
  except Exception as ex:
    print(ex)
  finally:
    s.close()
 
if __name__ == '__main__':
  server(8000)

在看客户端的代码，分别使用多线程和多进程实现

import socket
import gevent
import threading
import multiprocessing
'''
ip_bind = ("127.0.0.1",8000)
c = socket.socket()
c.connect(ip_bind)
while True:
  data = input("客户端:")
  c.send(bytes(data,encoding="utf-8"))
  data = c.recv(1024)
  print("服务端:",str(data,encoding="utf-8"))
 
c.close()
'''
import socket
import gevent
ip_bind = ("127.0.0.1",8000)
c = socket.socket()
c.connect(ip_bind)
def f(n):
  while True:
    # c.send(bytes(n,encoding="utf-8"))
    data = str(n)
    c.send(bytes(data,encoding="utf-8"))
    data = c.recv(1024)
    print("server:",str(data,encoding="utf-8"))
  c.close()
x = []
if __name__ == '__main__':
  l = []
  """
  多线程实现并发客户端
    for i in range(500):
     t = threading.Thread(target=f,args=[str(i),])
     t.start()
     l.append(t)
  for t in l:
     t.join()
 
  """
  # 多进程实现并发客户端
  for i in range(100):
    p = multiprocessing.Process(target=f,args=[i,])
    p.start()
    l.append(p)
  for p in l:
    p.join()

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